W39L020

256K

× 8 CMOS FLASH MEMORY

Publication Release Date: November 11, 2002

- 1 -

Revision A4

1. GENERAL DESCRIPTION

The W39L020 is a 2Mbit, 3.3-volt only CMOS flash memory organized as 256K

× 8 bits. For flexible

erase capability, the 2Mbits of data are divided into 4 uniform sectors of 64 Kbytes, which are
composed of 16 smaller even pages with 4 Kbytes. The byte-wide (

× 8) data appears on DQ7 - DQ0.

The device can be programmed and erased in-system with a standard 3.3V power supply. A 12-volt
V

is not required. The unique cell architecture of the W39L020 results in fast program/erase

operations with extremely low current consumption (compared to other comparable 3.3-volt flash
memory products). The device can also be programmed and erased by using standard EPROM
programmers.

2. FEATURES

Single 3.3-volt operations

- 3.3-volt Read

- 3.3-volt Erase

- 3.3-volt Program

Fast Program operation:

- Byte-by-Byte programming: 50 µS (max.)

Fast Erase operation:

- Chip Erase cycle time: 100 mS (max.)
- Sector Erase cycle time: 25mS (max.)
- Page Erase cycle time: 25mS (max.)

Read access time: 70/90 nS

4 Even sectors with 64K bytes each, which is

composed of 16 flexible pages with 4K bytes

Any individual sector or page can be erased

Hardware protection:

- Optional 16K byte or 64K byte Top/Bottom

Boot Block with lockout protection

Flexible 4K-page size can be used as

Parameter Blocks

Typical program/erase cycles: 1K/10K

Twenty-year data retention

Low power consumption

- Active current: 10 mA (typ.)

- Standby current: 5 µA (typ.)

End of program detection

- Software method: Toggle bit/Data polling

TTL compatible I/O

JEDEC standard byte-wide pinouts

Available packages: 32L PLCC, 32L TSOP (8 x

20 mm) and 32L STSOP (8 x 14 mm)

W39L020

- 2 -

3. PIN CONFIGURATIONS

DQ0

A14

A13

A11

#OE

A10

#CE

DQ7

32L PLCC

1
2
3
4
5

6
7
8
9

10
11
12

14
15

DQ0

DQ1

DQ2

#OE

A10

#CE

DQ7
DQ6
DQ5
DQ4
DQ3

32L TSOP & STSOP

A15
A12

A7
A6
A5
A4

#WE

A14

A13

A11

32
31
30
29
28
27
26
25
24

22
21
20
19
18
17

A16

A17

4. BLOCK DIAGRAM

CONTROL

OUTPUT

BUFFER

DECODER

CORE

ARRAY

#CE

#OE

#WE

A17

DQ0

DQ7

5. PIN DESCRIPTION

SYMBOL

PIN NAME

- A17

Address Inputs

DQ0

- DQ7

Data Inputs/Outputs

#CE

Chip Enable

#OE Output

Enable

#WE Write

Enable

Power

Supply

Ground

W39L020

Publication Release Date: November 11, 2002

- 3 -

Revision A4

6. FUNCTIONAL DESCRIPTION

Device Bus Operation

Read Mode
The read operation of the W39L020 is controlled by #CE and #OE, both of which have to be low for
the host to obtain data from the outputs. #CE is used for device selection. When #CE is high, the chip
is de-selected and only standby power will be consumed. #OE is the output control and is used to
gate data from the output pins. The data bus is in high impedance state when either #CE or #OE is
high. Refer to the timing waveforms for further details.

Write Mode
Device erasure and programming are accomplished via the command register. The contents of the
register serve as inputs to the internal state machine. The state machine outputs dictate the function
of the device.
The command register itself does not occupy any addressable memory location. The register is a
latch used to store the commands, along with the address and data information needed to execute the
command. The command register is written to bring #WE to logic low state, while #CE is at logic low
state and #OE is at logic high state. Addresses are latched on the falling edge of #WE or #CE,
whichever happens later; while data is latched on the rising edge of #WE or #CE, whichever happens
first. Standard microprocessor write timings are used.
Refer to AC Write Characteristics and the Erase/Programming Waveforms for specific timing
parameters.

Standby Mode
There are two ways to implement the standby mode on the W39L020 device, both using the #CE pin.

A CMOS standby mode is achieved with the

#CE

input held at

±0.5V. Under this condition the current

is typically reduced to less than 25

µA(max). A TTL standby mode is achieved with the #CE pin held at

. Under this condition the current is typically reduced to 2 mA(max).

In the standby mode the outputs are in the high impedance state, independent of the #OE input.

Output Disable Mode
With the #OE input at a logic high level (V

), output from the device is disabled. This will cause the

output pins to be in a high impedance state.

Auto-select Mode
The auto-select mode allows the reading of a binary code from the device and will identify its
manufacturer and type. This mode is intended for use by programming equipment for the purpose of
automatically matching the device to be programmed with its corresponding programming algorithm.
This mode is functional over the entire temperature range of the device.
To activate this mode, the programming equipment must force V

(11.5V to 12.5V) on address pin

A9. Two identifier bytes may then be sequenced from the device outputs by toggling address A0 from
V

to V

. All addresses are don

t cares except A0 and A1 (see "Auto-select Codes").

W39L020

- 4 -

The manufacturer and device codes may also be read via the command register, for instance, when
the W39L020

is erased or programmed in a system without access to high voltage on the A9 pin. The

command sequence is illustrated in "Auto-select Codes".

Byte 0 (A0 = V

) represents the manufacturer

s code (Winbond = DAH) and byte 1 (A0 = V

) the

device identifier code (W39L020 = B5hex). All identifiers for manufacturer and device will exhibit odd
parity with DQ7 defined as the parity bit. In order to read the proper device codes when executing the
Auto-select, A1 must be low state.

Data Protection

The W39L020

is designed to offer protection against accidental erasure or programming caused by

spurious system level signals that may exist during power transitions. During power up the device
automatically resets the internal state machine in the Read mode. Also, with its control register
architecture, alteration of the memory contents only occurs after successful completion of specific
multi-bus cycle command sequences. The device also incorporates several features to prevent
inadvertent write cycles resulting from V

power-up and power-down transitions or system noise.

Boot Block Operation

There are four alternatives to set the boot block. Either 16K-byte or 64K-byte in the top/bottom
location of this device can be locked as boot block, which can be used to store boot codes. It is
located in the last 16K/64K bytes or first 16K/64K bytes of the memory with the address range from
3C000/30000(hex) to 3FFFF(hex) for top location or 00000(hex) to 03FFF/0FFFF(hex) for bottom
location.
See Command Codes for Boot Block Lockout Enable for the specific code. Once this feature is set the
data for the designated block cannot be erased or programmed (programming lockout), other memory
locations can be changed by the regular programming method.
In order to detect whether the boot block feature is set on the first/last 16K/64K-bytes block or not,
users can perform software command sequence: enter the product identification mode (see
Command Codes for Identification/Boot Block Lockout Detection for specific code), and then read
from address 0002(hex) for first(bottom) location or 3FFF2(hex) for last(top) location. If the
DQ0/DQ1 of output data is "1," the 64Kbytes/16Kbytes boot block programming lockout feature will be
activated; if the DQ0/DQ1 of output data is "0," the lockout feature will be inactivated and the block
can be erased/programmed.
To return to normal operation, perform a three-byte command sequence (or an alternate single-byte
command) to exit the identification mode. For the specific code, see Command Codes for
Identification/Boot Block Lockout Detection.

Low V

Inhibit

To avoid initiation of a write cycle during V

power-up and power-down, the W39L020 locks out

when V

< 2.0V (see DC Characteristics section for voltages). The write and read operations are

inhibited when V

is less than 2.0V typical. The W39L020

ignores all write and read operations until

> 2,0V. The user must ensure that the control pins are in the correct logic state when V

> 2.0V

to prevent unintentional writes.

Write Pulse "Glitch" Protection
Noise pulses of less than 10 nS (typical) on #OE, #CE, or #WE will not initiate a write cycle.

W39L020

Publication Release Date: November 11, 2002

- 5 -

Revision A4

Logical Inhibit
Writing is inhibited by holding any one of #OE = V

, #CE = V

, or #WE = V

. To initiate a write cycle

#CE and #WE must be a logical zero while #OE is a logical one.

Power-up Write and Read Inhibit
Power-up of the device with #WE = #CE = V

and #OE = V

will not accept commands on the rising

edge of #WE except 5mS delay (see the power up timing in AC Characteristics). The internal state
machine is automatically reset to the read mode on power-up.

Command Definitions

Device operations are selected by writing specific address and data sequences into the command
register. Writing incorrect address and data values or writing them in the improper sequence will reset
the device to the read mode. "Command Definitions" defines the valid register command sequences.

Read Command
The device will automatically power-up in the read state. In this case, a command sequence is not
required to read data. Standard microprocessor read cycles will retrieve array data. This default value
ensures that no spurious alteration of the memory content occurs during the power transition.
The device will automatically returns to read state after completing an Embedded Program or
Embedded Erase algorithm.
Refer to the AC Read Characteristics and Waveforms for the specific timing parameters.

Auto-select Command
Flash memories are intended for use in applications where the local CPU can alter memory contents.
As such, manufacture and device codes must be accessible while the device resides in the target
system. PROM programmers typically access the signature codes by raising A9 to a high voltage.
However, multiplexing high voltage onto the address lines is not generally a desirable system design
practice.
The device contains an auto-select command operation to supplement traditional PROM programming
methodology. The operation is initiated by writing the auto-select command sequence into the
command register. Following the command write, a read cycle from address XX00H retrieves the
manufacture code of DAH. A read cycle from address XX01H returns the device code (W39L020 =
B5hex).
To terminate the operation, it is necessary to write the auto-select exit command sequence into the
register.

Byte Program Command
The device is programmed on a byte-by-byte basis. Programming is a four-bus-cycle operation. The
program command sequence is initiated by writing two "unlock" write cycles, followed by the program
set-up command. The program address and data are written next, which in turn initiate the Embedded
program algorithm. Addresses are latched on the falling edge of #CE or #WE, whichever happens
later and the data is latched on the rising edge of #CE or #WE, whichever happens first. The rising
edge of #CE or #WE (whichever happens first) begins programming using the Embedded Program

W39L020

- 6 -

Algorithm. Upon executing the algorithm, the system is not required to provide further controls or
timings. The device will automatically provide adequate internally generated program pulses and verify
the programmed cell margin.
The automatic programming operation is completed when the data on DQ7 (also used as Data
Polling) is equivalent to the data written to this bit at which time the device returns to the read mode
and addresses are no longer latched (see "Hardware Sequence Flags"). Therefore, the device
requires that a valid address to the device be supplied by the system at this particular instance of time
for Data Polling operations. Data Polling must be performed at the memory location which is being
programmed.
Any commands written to the chip during the Embedded Program Algorithm will be ignored. If a
hardware reset occurs during the programming operation, the data at that particular location will be
corrupted.
Programming is allowed in any sequence and across sector boundaries. Beware that a data "0"
cannot be programmed back to a "1". Attempting to program 0 back to 1, the toggle bit will stop
toggling. Only erase operations can convert "0"s to "1"s.
Refer to the Programming Command Flow Chart using typical command strings and bus operations.

Chip Erase Command
Chip erase is a six-bus-cycle operation. There are two "unlock" write cycles, followed by writing the
"set-up" command. Two more "unlock" write cycles are asserted, followed by the chip erase
command.
Chip erase does not require the user to program the device prior to erase. Upon executing the
Embedded Erase Algorithm command sequence the device will automatically erase and verify the
entire memory for an all one data pattern. The erase is performed sequentially on each sectors at the
same time (see "Feature"). The system is not required to provide any controls or timings during these
operations.
The automatic erase begins on the rising edge of the last #WE pulse in the command sequence and
terminates when the data on DQ7 is "1" at which time the device returns to read the mode.
Refer to the Erase Command Flow Chart using typical command strings and bus operations.

Sector/Page Erase Command
Sector/page erase is a six bus cycles operation. There are two "unlock" write cycles, followed by
writing the "set-up" command. Two more "unlock" write cycles then follows by the sector erase
command. The sector/page address (any address location within the desired sector/page) is latched
on the falling edge of #WE, while the command (30H/50H) is latched on the rising edge of #WE.
Sector/page erase does not require the user to program the device prior to erase. When erasing a
sector/page or sectors/pages the remaining unselected sectors/pages are not affected. The system is
not required to provide any controls or timings during these operations.
The automatic sector/page erase begins after the erase command is completed, right from the rising
edge of the #WE pulse for the last sector/page erase command pulse and terminates when the data
on DQ7, Data Polling, is "1" at which time the device returns to the read mode. Data Polling must be
performed at an address within any of the sectors/pages being erased.
Refer to the Erase Command flow Chart using typical command strings and bus operations.

W39L020

Publication Release Date: November 11, 2002

- 7 -

Revision A4

Write Operation Status

DQ7: Data Polling

The W39L020 device features Data Polling as a method to indicate to the host that the embedded
algorithms are in progress or completed.
During the Embedded Program Algorithm, an attempt to read the device will produce the complement
of the data last written to DQ7. Upon completion of the Embedded Program Algorithm, an attempt to
read the device will produce the true data last written to DQ7.
During the Embedded Erase Algorithm, an attempt to read the device will produce a "0" at the DQ7
output. Upon completion of the Embedded Erase Algorithm, an attempt to read the device will produce
a "1" at the DQ7 output.
For chip erase, the Data Polling is valid after the rising edge of the sixth pulse in the six #WE write
pulse sequences. For sector erase, the Data Polling is valid after the last rising edge of the sector
erase #WE pulse. Data Polling must be performed at sector addresses within any of the sectors being
erased. Otherwise, the status may not be valid.
Just prior to the completion of Embedded Algorithm operations DQ7 may change asynchronously
while the output enable (#OE) is asserted low. This means that the device is driving status information
on DQ7 at one instant of time and then that byte

s valid data at the next instant of time. Depending on

when the system samples the DQ7 output, it may read the status or valid data. Even if the device has
completed the Embedded Algorithm operations and DQ7 has a valid data, the data outputs on DQ0
DQ6 may be still invalid. The valid data on DQ0

- DQ7 will be read on the successive read attempts.

The Data Polling feature is only active during the Embedded Programming Algorithm, Embedded
Erase Algorithm, or sector erase time-out (see "Command Definitions").

DQ6: Toggle Bit

The W39L020 also features the "Toggle Bit" as a method to indicate to the host system that the
embedded algorithms are in progress or completed.
During an Embedded Program or Erase Algorithm cycle, successive attempts to read (#OE toggling)
data from the device at any address will result in DQ6 toggling between one and zero. Once the
Embedded Program or Erase Algorithm cycle is completed, DQ6 will stop toggling and valid data will
be read on the next successive attempt. During programming, the Toggle Bit is valid after the rising
edge of the fourth #WE pulse in the four write pulse sequence. For chip erase, the Toggle Bit is valid
after the rising edge of the sixth #WE pulse in the six write pulse sequence. For sector/page erase, the
Toggle Bit is valid after the last rising edge of the sector/page erase #WE pulse. The Toggle Bit is
active during the sector/page erase time-out.
Either #CE or #OE toggling will cause DQ6 to toggle.

W39L020

- 8 -

7. TABLE OF OPERATING MODES

Device Bus Operations

= 12

± 0.5V)

PIN

MODE

#CE

#OE #WE

A0 A1 A9

DQ0

- DQ7

Read V

A0 A1 A9

Dout

Write V

A0 A1 A9

Din

Standby V

X X X X X

High

X V

X X X

High Z/

Dout

Write Inhibit

X X V

X X X

High Z/

Dout

Output Disable

X X X

High

Auto select Manufacturers ID

Code

Auto select Device ID

Code

Auto-select Codes (High Voltage Method)

= 12

± 0.5V)

DESCRIPTION

#CE #OE

#WE

THE OTHER ADDRESS

DQ[7:0]

Manufacturer ID: Winbond

All Add = V

DAhex

Device ID: W39L020

A1 = V

, All other = V

B5hex

Sector Address Table

SECTOR

A17 A16

SECTOR SIZE

(KBYTES)

ADDRESS

SA0 0

0 64

00000h

- 0FFFFh

SA1 0

1 64

10000h

- 1FFFFh

SA2 1

0 64

20000h

- 2FFFFh

SA3 1

1 64

30000h

- 3FFFFh

Note: All sectors are 64K bytes in size.

W39L020

Publication Release Date: November 11, 2002

- 9 -

Revision A4

Command Definitions

COMMAND

NO. OF 1ST CYCLE 2ND CYCLE 3RD CYCLE 4TH CYCLE 5TH CYCLE 6TH CYCLE 7TH CYCLE

DESCRIPTION

Cycles Addr.

(1)

Data Addr. Data Addr. Data Addr. Data Addr. Data Addr. Data

Addr. Data

OUT

Chip Erase

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

5555 10

Sector Erase

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

(3)

Page Erase

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

(4)

Byte Program

5555 AA

2AAA 55

5555 A0

Top Boot Block
Lockout
64K/16KByte

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

5555 40/70

3FFFF XX

(5)

Bottom Boot Block
Lockout -
64K/16KByte

5555 AA

2AAA 55

5555 80

5555 AA

2AAA 55

5555 40/70

00000 XX

(5)

Product ID Entry

5555 AA

2AAA 55

5555 90

Product ID Exit

(2)

3 5555 AA

2AAA 55

5555 F0

Product ID Exit

(2)

1 XXXX F0

Notes:

1. Address Format: A14

- A0 (Hex); Data Format: DQ7 - DQ0 (Hex)

2. Either one of the two Product ID Exit commands can be used.

3. SA: Sector Address

SA = 3XXXXh for Unique Sector3
SA = 2XXXXh for Unique Sector2
SA = 1XXXXh for Unique Sector1
SA = 0XXXXh for Unique Sector0

4. PA: Page Address

PA = 3FXXXh for Page 15 in Sector3 PA = 2FXXXh for Page 15 in Sector2 PA = 1FXXXh for Page 15 in Sector1

PA = 0FXXXh for Page 15 in Sector0

PA = 3EXXXh for Page 14 in Sector3 PA = 2EXXXh for Page 14 in Sector2 PA = 1EXXXh for Page 14 in Sector1

PA = 0EXXXh for Page 14 in Sector0

PA = 3DXXXh for Page 13 in Sector3 PA = 2DXXXh for Page 13 in Sector2 PA = 1DXXXh for Page 13 in Sector1

PA = 0DXXXh for Page 13 in Sector0

PA = 3CXXXh for Page 12 in Sector3 PA = 2CXXXh for Page 12 in Sector2 PA = 1CXXXh for Page 12 in Sector1

PA = 0CXXXh for Page 12 in Sector0

PA = 3BXXXh for Page 11 in Sector3 PA = 2BXXXh for Page 11 in Sector2 PA = 1BXXXh for Page 11 in Sector1

PA = 0BXXXh for Page 11 in Sector0

PA = 3AXXXh for Page 10 in Sector3 PA = 2AXXXh for Page 10 in Sector2 PA = 1AXXXh for Page 10 in Sector1

PA = 0AXXXh for Page 10 in Sector0

PA = 39XXXh for Page 9 in Sector3

SA = 29XXXh for Page 9 in Sector2

SA = 19XXXh for Page 9 in Sector1

SA = 09XXXh for Page 9 in Sector0

PA = 38XXXh for Page 8 in Sector3

SA = 28XXXh for Page 8 in Sector2

SA = 18XXXh for Page 8 in Sector1

SA = 08XXXh for Page 8 in Sector0

PA = 37XXXh for Page 7 in Sector3

SA = 27XXXh for Page 7 in Sector2

SA = 17XXXh for Page 7 in Sector1

SA = 07XXXh for Page 7 in Sector0

PA = 36XXXh for Page 6 in Sector3

SA = 26XXXh for Page 6 in Sector2

SA = 16XXXh for Page 6 in Sector1

SA = 06XXXh for Page 6 in Sector0

PA = 35XXXh for Page 5 in Sector3

SA = 25XXXh for Page 5 in Sector2

SA = 15XXXh for Page 5 in Sector1

SA = 05XXXh for Page 5 in Sector0

PA = 34XXXh for Page 4 in Sector3

SA = 24XXXh for Page 4 in Sector2

SA = 14XXXh for Page 4 in Sector1

SA = 04XXXh for Page 4 in Sector0

PA = 33XXXh for Page 3 in Sector3

SA = 23XXXh for Page 3 in Sector2

SA = 13XXXh for Page 3 in Sector1

SA = 03XXXh for Page 3 in Sector0

PA = 32XXXh for Page 2 in Sector3

SA = 22XXXh for Page 2 in Sector2

SA = 12XXXh for Page 2 in Sector1

SA = 02XXXh for Page 2 in Sector0

PA = 31XXXh for Page 1 in Sector3

SA = 21XXXh for Page 1 in Sector2

SA = 11XXXh for Page 1 in Sector1

SA = 01XXXh for Page 1 in Sector0

PA = 30XXXh for Page 0 in Sector3

SA = 20XXXh for Page 0 in Sector2

SA = 10XXXh for Page 0 in Sector1

SA = 00XXXh for Page 0 in Sector0

5. XX: Don't care

W39L020

- 14 -

Software Product Identification and Boot Block Lockout Detection Flow Chart

Product

Identification

Entry (1)

Load data 55

address 2AAA

Load data 90

address 5555

Pause 10 S

Product

Identification

and Boot Block

Lockout

D t ti

Mode (3)

Read address = 0000

data = DA

Read address = 0001

Read address=02/3FFF2

for Bottom/Top

data:in DQ0="1" or "0"

for 64K Boot Block

or DQ1="1" or "0"

for 16K Boot Block

(4)

Product

Identification Exit(6)

Load data

address 2AAA

Load data F0

address 5555

Normal Mode

(5)

(2)

Load data AA

address 5555

Load data AA

address 5555

Pause 10 S

data = B5

Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ7

- DQ0 (Hex); Address Format: A14 - A0 (Hex)

(2) A1

- A17 = V

; manufacture code is read for A0 = V

; device code is read for A0 = V

(3) The device does not remain in identification and boot block lockout detection mode if power down.
(4) If the output data in DQ0 or DQ1= " 1 " the boot block programming lockout feature is activated; if the output data

in DQ0 or DQ1= " 0," the lockout feature is inactivated and the matched boot block can be programmed.

(5) The device returns to standard operation mode.
(6) Optional 1-byte cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout
detection.

W39L020

Publication Release Date: November 11, 2002

- 15 -

Revision A4

8. DC CHARACTERISTICS

Absolute maximum Ratings

PARAMETER RATING

UNIT

Power Supply Voltage to V

Potential

-2.0 to +4.6

Operating Temperature

0 to +70

°C

Storage Temperature

-65 to +125

°C

Voltage on Any Pin to Ground Potential Except A9

-2.0 to +4.6

Voltage on A9 Pin to Ground Potential

-2.0 to +13.0

Note: Exposure to conditions beyond those listed under Absolute maximum Ratings may adversely affect the life and reliability

of the device.

DC Operating Characteristics

= 3.3V

±0.3V, V

= 0V, T

= 0 to 70

° C)

LIMITS

PARAMETER SYM.

TEST

CONDITIONS

MIN. TYP. MAX.

UNIT

Power Supply
Current

#CE = #OE = V

, #WE = V

all DQs open
Address inputs = V

, at f = 5 MHz

- 10 20

Standby V

Current

(TTL input)

#CE = V

, all DQs open

Other inputs = V

- 1 2 mA

Standby V

Current

(CMOS input)

#CE = V

-0.3V, all DQs open

Other inputs = V

-0.3V/ V

- 5 25

µA

Input Leakage
Current

= V

to V

µA

Output Leakage
Current

OUT

= V

to V

µA

Input Low Voltage

- -0.3

0.8

Input High Voltage

- 2.0

+0.5

Output Low Voltage

= 2.1 mA

0.45

Output High Voltage

= -0.4 mA

2.4

Pin Capacitance

= 3.3V, T

= 25

° C, f = 1 MHz)

PARAMETER SYMBOL

CONDITIONS

TYP.

MAX.

UNIT

Input Capacitance

= 0V

Output Capacitance

OUT

= 0V

W39L020

Publication Release Date: November 11, 2002

- 17 -

Revision A4

AC Characteristics, continued

Read Cycle Timing Parameters

= 3.3V

±0.3V, V

= 0V, T

= 0 to 70

° C)

W39L020-70 W39L020-90

PARAMETER SYM.

MIN. MAX. MIN. MAX.

UNIT

Read Cycle Time

70 - 90 - nS

Chip Enable Access Time

- 70 - 90 nS

Address Access Time

- 70 - 90 nS

Output Enable Access Time

- 35 - 45 nS

#CE Low to Active Output

CLZ

0 - 0 - nS

#OE Low to Active Output

OLZ

0 - 0 - nS

#CE High to High-Z Output

CHZ

- 25 - 25 nS

#OE High to High-Z Output

OHZ

- 25 - 25 nS

Output Hold from Address Change

0 - 0 - nS

Write Cycle Timing Parameters

PARAMETER SYMBOL

MIN.

TYP.

MAX.

UNIT

Address Setup Time

0 - - nS

Address Hold Time

40 - - nS

#WE and #CE Setup Time

0 - - nS

#WE and #CE Hold Time

0 - - nS

#OE High Setup Time

OES

0 - - nS

#OE High Hold Time

OEH

0 - - nS

#CE Pulse Width

100 - - nS

#WE Pulse Width

100 - - nS

#WE High Width

WPH

100 - - nS

Data Setup Time

40 - - nS

Data Hold Time

10 - - nS

Byte Programming Time

- 35 50

µS

Chip Erase Cycle Time

- 50

100

Sector/Page Erase Cycle Time

- 12.5 25 mS

Note: All AC timing signals observe the following guidelines for determining setup and hold times:

(a) High level signal's reference level is V

and (b) low level signal's reference level is V

W39L020

Publication Release Date: November 11, 2002

- 23 -

Revision A4

11. ORDERING INFORMATION

PART NO.

ACCESS

TIME

(nS)

POWER SUPPLY

CURRENT MAX.

(mA)

STANDBY V

CURRENT MAX.

(mA)

PACKAGE CYCLE

W39L020P-70 70

2 32L

PLCC

W39L020P-90 90

2 32L

PLCC

W39L020T-70 70

32L TSOP (8 x 20 mm)

W39L020T-90 90

32L TSOP (8 x 20 mm)

W39L020Q-70 70

32L STSOP (8 x 14 mm)

W39L020Q-90 90

32L STSOP (8 x 14 mm)

W39L020P-70B 70

2 32L

PLCC

10K

W39L020P-90B 90

2 32L

PLCC

10K

W39L020T-70B 70

32L TSOP (8 x 20 mm)

10K

W39L020T-90B 90

32L TSOP (8 x 20 mm)

10K

W39L020Q-70B 70

32L STSOP (8 x 14 mm)

10K

W39L020Q-90B 90

32L STSOP (8 x 14 mm)

10K

Notes:
1. Winbond reserves the right to make changes to its products without prior notice.
2. Purchasers are responsible for performing appropriate quality assurance testing on products intended for use in
applications where personal injury might occur as a consequence of product failure.

12. HOW TO READ THE TOP MARKING

Example: The top marking of 32-pin TSOP W39L020T-70

line: Winbond logo

line: the part number: W39L020T-70

line: the lot number

line: the tracking code: 149 O B SA

149: Packages made in '01, week 49
O: Assembly house ID: A means ASE, O means OSE, ...etc.
B: IC revision; A means version A, B means version B, ...etc.
SA: Process code

W39L020T-70

2138977A-A12

149OBSA

W39L020

- 24 -

13. PACKAGE DIMENSIONS

32L PLCC

D H

Seating Plane

Notes:

1. Dimensions D & E do not include interlead flash.
2. Dimension b1 does not include dambar protrusion/intrusion.
3. Controlling dimension: Inches.

4. General appearance spec. should be based on final

visual inspection sepc.

Symbol

Min.

Nom.

Max.

Nom.

Min.

Dimension in Inches

Dimension in mm

b
c
D

A
A

3.56

0.50

2.80

2.67

2.93

0.71

0.66

0.81

0.41

0.46

0.56

0.20

0.25

0.35

13.89

13.97

14.05

11.35

11.43

11.51

1.27

12.45

12.95

13.46

9.91

10.41

10.92

14.86

14.99

15.11

12.32

12.45

12.57

1.91

2.29

0.004

0.095

0.090

0.075

0.495

0.490

0.485

0.595

0.590

0.585

0.430

0.410

0.390

0.530

0.510

0.490

0.050

0.453

0.450

0.447

0.553

0.550

0.547

0.014

0.010

0.008

0.022

0.018

0.016

0.032

0.026

0.028

0.115

0.105

0.110

0.020

0.140

1.12

1.42

0.044

0.056

0.10

2.41

32L TSOP (8 x 20 mm)

0.10(0.004)

Min.

Nom.

Max.

Min.

Nom.

Max.

Symbol

Note:

Controlling dimension: Millimeters

Dimension in Inches

0.047

0.006

0.041

0.039

0.037

0.007

0.008

0.009

0.005

0.006

0.007

0.720

0.724

0.728

0.311

0.315

0.319

0.780

0.787

0.795

0.020

0.016

0.020

0.024

0.031

0.000

0.004

0.002

1.20

0.05

0.15

1.05

1.00

0.95

0.17

0.12

18.30

7.90

19.80

0.40

0.00

0.20

0.23

0.15

0.17

18.40

18.50

8.00

8.10

20.00

20.20

0.50

0.60

0.80

0.10

Dimension in mm

W39L020

- 26 -

14. VERSION HISTORY

VERSION DATE PAGE

DESCRIPTION

May 2001

Initial Issued

May 31, 2002

1, 23

Add cycle of 1K

Change active current from 20 to10 mA (typ.)

Change standby current from 10 to15

µA (typ.)

Correct Power-up Write Inhibit as Power-up Write and
Read Inhibit

Add Low V

inhibit description

- 14

Correct old flow chart and add embedded algorithm

Change I

from 20/30 mA

to10/20 mA (typ./max.)

Change I

2 from 10/20

µA

to15/50

µA (typ./max.)

Change power supply current max from 30 to 20 (mA)

Add HOW TO READ THE TOP MARKING

July 10, 2002

Correct Block Erase as Sector Erase in the
Embedded Erase Algorithm

Correct Embedded #Data Polling Algorithm

Nov. 11, 2002

1, 3, 15

Change Standby Current from 15 to 5

µA (typ.) and from

50 to 25

µA (max.)

Headquarters

No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5665577
http://www.winbond.com.tw/

Taipei Office

TEL: 886-2-8177-7168
FAX: 886-2-8751-3579

Winbond Electronics Corporation America

2727 North First Street, San Jose,
CA 95134, U.S.A.
TEL: 1-408-9436666
FAX: 1-408-5441798

Winbond Electronics (H.K.) Ltd.

No. 378 Kwun Tong Rd.,
Kowloon, Hong Kong

FAX: 852-27552064

Unit 9-15, 22F, Millennium City,

TEL: 852-27513100

Please note that all data and specifications are subject to change without notice.

All the trade marks of products and companies mentioned in this data sheet belong to their respective owners.

Winbond Electronics (Shanghai) Ltd.

200336 China

FAX: 86-21-62365998

27F, 2299 Yan An W. Rd. Shanghai,

TEL: 86-21-62365999

Winbond Electronics Corporation Japan

Shinyokohama Kohoku-ku,
Yokohama, 222-0033

FAX: 81-45-4781800

7F Daini-ueno BLDG, 3-7-18

TEL: 81-45-4781881

9F, No.480, Rueiguang Rd.,

Neihu Chiu, Taipei, 114,

Taiwan, R.O.C.

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