SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

Control Inputs V

Levels are

Referenced to V

CCA

Voltage

Isolation Feature - If Either V

Input

Is at GND, Both Ports Are in the
High-Impedance State

Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications

Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.2-V to
3.6-V Power-Supply Range

off

Supports Partial-Power-Down Mode

Operation

I/Os Are 4.6-V Tolerant

Max Data Rates
- 380 Mbps (1.8-V to 3.3-V Translation)
- 260 Mbps (< 1.8-V to 3.3-V Translation)
- 260 Mbps (Translate to 2.5 V)
- 210 Mbps (Translate to 1.8 V)
- 120 Mbps (Translate to 1.5 V)
- 100 Mbps (Translate to 1.2 V)

Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II

ESD Protection Exceeds JESD 22
- 8000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

description/ordering information

This 20-bit noninverting bus transceiver uses two
separate configurable power-supply rails.

The SN74AVC20T245 is optimized to operate with V

CCA

CCB

set at 1.4 V to 3.6 V. It is operational with

CCA

CCB

as low as 1.2 V. The A port is designed to track V

CCA

. V

CCA

accepts any supply voltage from

1.2 V to 3.6 V. The B port is designed to track V

CCB

. V

CCB

accepts any supply voltage from 1.2 V to 3.6 V. This

allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V
voltage nodes.

ORDERING INFORMATION

PACKAGE

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

TSSOP - DGG

Tape and reel

SN74AVC20T245DGGR

AVC20T245

-40

C to 85

TVSOP - DGV

Tape and reel

SN74AVC20T245DGVR

WG245

-40

C to 85

VFBGA - GQL

Tape and reel

SN74AVC20T245GQLR

WG245

VFBGA - ZQL (Pb-free)

Tape and reel

SN74AVC20T245ZQLR

WG245

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available

at www.ti.com/sc/package.

DGG OR DGV PACKAGE

(TOP VIEW)

1DIR

1B1
1B2

GND

1B3
1B4

CCB

1B5
1B6
1B7

GND

1B8
1B9

1B10

2B1
2B2
2B3

GND

2B4
2B5
2B6

CCB

2B7
2B8

GND

2B9

2B10

2DIR

1OE
1A1
1A2
GND
1A3
1A4
V

CCA

1A5
1A6
1A7
GND
1A8
1A9
1A10
2A1
2A2
2A3
GND
2A4
2A5
2A6
V

CCA

2A7
2A8
GND
2A9
2A10
2OE

2005, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

description/ordering information (continued)

The SN74AVC20T245 is designed for asynchronous communication between data buses. The device transmits
data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE) input is used to disable the outputs so that the buses are
isolated.

The SN74AVC20T245 is designed so that the control (1DIR, 2DIR, 1OE, and 2OE) inputs are supplied by V

CCA

This device is fully specified for partial-power-down applications using I

off

. The I

off

circuitry disables the outputs,

preventing damaging current backflow through the device when it is powered down.

The V

isolation feature ensures that if either V

input is at GND, both ports are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE should be tied to V

through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

terminal assignments

1B1

1B2

1DIR

1OE

1A2

1A1

1B3

1B4

GND

1A4

1A3

1B5

1B6

VCCB

VCCA

1A6

1A5

1B7

1B8

GND

1A8

1A7

1B9

1B10

1A10

1A9

2B1

2B2

2A2

2A1

2B3

2B4

GND

2A4

2A3

2B5

2B6

VCCB

VCCA

2A6

2A5

2B7

2B8

GND

2A8

2A7

2B9

2B10

2DIR

2OE

2A10

2A9

FUNCTION TABLE

(each 10-bit section)

INPUTS

OPERATION

DIR

OPERATION

B data to A bus

A data to B bus

Isolation

GQL OR ZQL PACKAGE

(TOP VIEW)

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

logic diagram (positive logic)

To Nine Other Channels

1DIR

1A1

1B1

1OE

To Nine Other Channels

2DIR

2A1

2B1

2OE

Pin numbers shown are for the DGG and DGV packages.

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V

CCA

and V

CCB

-0.5 V to 4.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, V

(see Note 1): I/O ports (A port)

-0.5 V to 4.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O ports (B port)

-0.5 V to 4.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control inputs

-0.5 V to 4.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the high-impedance or power-off state, V

(see Note 1): (A port)

-0.5 V to 4.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(B port)

-0.5 V to 4.6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the high or low state, V

(see Notes 1 and 2): (A port)

-0.5 V to V

CCA

+ 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(B port)

-0.5 V to V

CCB

+ 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input clamp current, I

< 0)

-50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output clamp current, I

< 0)

-50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous output current, I

50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous current through each V

CCA

, V

CCB

, and GND

100 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

(see Note 3): DGG package

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DGV package

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GQL/ZQL package

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, T

stg

-65

C to 150

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input voltage and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
2. The output positive-voltage rating may be exceeded up to 4.6 V maximum if the output current rating is observed.
3. The package thermal impedance is calculated in accordance with JESD 51-7.

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

recommended operating conditions (see Notes 4 through 8)

VCCI

VCCO

MIN

MAX

UNIT

VCCA

Supply voltage

1.2

3.6

VCCB

Supply voltage

1.2

3.6

High-level input

Data inputs

1.2 V to 1.95 V

VCCI

0.65

VIH

High-level input
voltage

Data inputs

(see Note 7)

1.95 V to 2.7 V

1.6

VIH

voltage

(see Note 7)

2.7 V to 3.6 V

Low-level input

Data inputs

1.2 V to 1.95 V

VCCI

0.35

VIL

Low-level input
voltage

Data inputs

(see Note 7)

1.95 V to 2.7 V

0.7

VIL

voltage

(see Note 7)

2.7 V to 3.6 V

0.8

High-level input

DIR

1.2 V to 1.95 V

VCCA

0.65

VIH

High-level input
voltage

DIR

(referenced to VCCA)

1.95 V to 2.7 V

1.6

VIH

voltage

(referenced to VCCA)

(see Note 8)

2.7 V to 3.6 V

Low-level input

DIR

1.2 V to 1.95 V

VCCA

0.35

VIL

Low-level input
voltage

DIR

(referenced to VCCA)

1.95 V to 2.7 V

0.7

VIL

voltage

(referenced to VCCA)

(see Note 8)

2.7 V to 3.6 V

0.8

Input voltage

3.6

Output voltage

Active state

VCCO

Output voltage

3-state

3.6

1.2 V

-3

1.4 V to 1.6 V

-6

IOH

High-level output current

1.65 V to 1.95 V

-8

IOH

High-level output current

2.3 V to 2.7 V

-9

3 V to 3.6 V

-12

1.2 V

1.4 V to 1.6 V

IOL

Low-level output current

1.65 V to 1.95 V

IOL

Low-level output current

2.3 V to 2.7 V

3 V to 3.6 V

Input transition rise or fall rate

ns/V

Operating free-air temperature

-40

NOTES:

4. VCCI is the VCC associated with the data input port.
5. VCCO is the VCC associated with the output port.
6. All unused data inputs of the device must be held at VCCI or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

7. For VCCI values not specified in the data sheet, VIH(min) = VCCI x 0.7 V, VIL(max) = VCCI x 0.3 V.
8. For VCCI values not specified in the data sheet, VIH(min) = VCCA x 0.7 V, VIL(max) = VCCA x 0.3 V.

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Notes 9 and 10)

PARAMETER

TEST CONDITIONS

VCCA

VCCB

TA = 25

-40

C to 85

UNIT

PARAMETER

TEST CONDITIONS

VCCA

VCCB

MIN

TYP

MAX

MIN

MAX

UNIT

IOH = -100

1.2 V to 3.6 V

VCCO - 0.2 V

IOH = -3 mA

1.2 V

0.95

VOH

IOH = -6 mA

VI = VIH

1.4 V

1.05

VOH

IOH = -8 mA

VI = VIH

1.65 V

1.2

IOH = -9 mA

2.3 V

1.75

IOH = -12 mA

3 V

2.3

IOL = 100

1.2 V to 3.6 V

0.2

IOL = 3 mA

1.2 V

0.15

VOL

IOL = 6 mA

VI = VIL

1.4 V

0.35

VOL

IOL = 8 mA

VI = VIL

1.65 V

0.45

IOL = 9 mA

2.3 V

0.55

IOL = 12 mA

3 V

0.7

Control
inputs

VI = VCCA or GND

1.2 V to 3.6 V

0.025

0.25

Ioff

A or B
port

VI or VO = 0 to 3.6 V

0 V

0 to 3.6 V

0.1

Ioff

A or B
port

VI or VO = 0 to 3.6 V

0 to 3.6 V

0 V

0.1

IOZ

A or B
ports

VO = VCCO or
GND,
VI = VCCI or GND

OE = VIH

3.6 V

0.5

2.5

1.2 V to 3.6 V

ICCA

VI = VCCI or GND, IO = 0

0 V

3.6 V

-5

ICCA

VI = VCCI or GND, IO = 0

3.6 V

0 V

1.2 V to 3.6 V

ICCB

VI = VCCI or GND, IO = 0

0 V

3.6 V

ICCB

VI = VCCI or GND, IO = 0

3.6 V

0 V

-5

ICCA

)

ICCB

VI = VCCI or GND, IO = 0

1.2 V to 3.6 V

Control
inputs

VI = 3.3 V or GND

3.3 V

3.5

Cio

A or B
ports

VO = 3.3 V or GND

3.3 V

For I/O ports, the parameter IOZ includes the input leakage current.
NOTES:

9. VCCO is the VCC associated with the output port.

10. VCCI is the VCC associated with the input port.

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

switching characteristics over recommended operating free-air temperature range,
V

CCA

= 1.2 V (see Figure 1)

PARAMETER

FROM

VCCB = 1.2 V

VCCB = 1.5 V

VCCB = 1.8 V

VCCB = 2.5 V

VCCB = 3.3 V

UNIT

PARAMETER

FROM

(INPUT)

(OUTPUT)

TYP

UNIT

tPLH

3.8

3.1

2.8

2.7

3.3

tPHL

3.8

3.1

2.8

2.7

3.3

tPLH

4.1

3.8

3.6

3.5

3.4

tPHL

4.1

3.8

3.6

3.5

3.4

tPZH

6.5

tPZL

6.5

tPZH

5.6

4.4

3.8

3.3

3.2

tPZL

5.6

4.4

3.8

3.3

3.2

tPHZ

6.4

tPLZ

6.4

tPHZ

5.7

4.6

4.7

4.1

5.4

tPLZ

5.7

4.6

4.7

4.1

5.4

switching characteristics over recommended operating free-air temperature range,
V

CCA

= 1.5 V

0.1 V (see Figure 1)

PARAMETER

FROM

(INPUT)

(OUTPUT)

VCCB = 1.2 V

VCCB = 1.5 V

0.1 V

VCCB = 1.8 V

0.15 V

VCCB = 2.5 V

0.2 V

VCCB = 3.3 V

0.3 V

UNIT

PARAMETER

(INPUT)

(OUTPUT)

TYP

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

3.8

0.5

6.4

0.5

5.4

0.5

4.3

0.5

3.9

tPHL

3.8

0.5

6.4

0.5

5.4

0.5

4.3

0.5

3.9

tPLH

3.1

0.5

6.4

0.5

6.1

0.5

5.8

0.5

5.7

tPHL

3.1

0.5

6.4

0.5

6.1

0.5

5.8

0.5

5.7

tPZH

4.3

1.5

10.3

1.5

10.3

1.5

10.2

1.5

10.2

tPZL

4.3

1.5

10.3

1.5

10.3

1.5

10.2

1.5

10.2

tPZH

5.2

10.3

8.4

0.5

6.1

0.5

5.3

tPZL

5.2

10.3

8.4

0.5

6.1

0.5

5.3

tPHZ

4.5

tPLZ

4.5

tPHZ

5.1

1.5

7.8

6.4

5.9

tPLZ

5.1

1.5

7.8

6.4

5.9

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

switching characteristics over recommended operating free-air temperature range,
V

CCA

= 1.8 V

0.15 V (see Figure 1)

PARAMETER

FROM

(INPUT)

(OUTPUT)

VCCB = 1.2 V

VCCB = 1.5 V

0.1 V

VCCB = 1.8 V

0.15 V

VCCB = 2.5 V

0.2 V

VCCB = 3.3 V

0.3 V

UNIT

PARAMETER

(INPUT)

(OUTPUT)

TYP

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

3.6

0.5

6.1

0.5

3.9

0.5

3.5

tPHL

3.6

0.5

6.1

0.5

3.9

0.5

3.5

tPLH

2.8

0.5

5.4

0.5

4.7

0.5

4.6

tPHL

2.8

0.5

5.4

0.5

4.7

0.5

4.6

tPZH

3.4

8.1

7.9

tPZL

3.4

8.1

7.9

tPZH

0.5

7.9

0.5

5.7

0.5

4.8

tPZL

0.5

7.9

0.5

5.7

0.5

4.8

tPHZ

4.1

7.4

tPLZ

4.1

7.4

tPHZ

4.9

1.5

8.7

1.5

7.4

5.8

5.1

tPLZ

4.9

1.5

8.7

1.5

7.4

5.8

5.1

switching characteristics over recommended operating free-air temperature range,
V

CCA

= 2.5 V

0.2 V (see Figure 1)

PARAMETER

FROM

(INPUT)

(OUTPUT)

VCCB = 1.2 V

VCCB = 1.5 V

0.1 V

VCCB = 1.8 V

0.15 V

VCCB = 2.5 V

0.2 V

VCCB = 3.3 V

0.3 V

UNIT

PARAMETER

(INPUT)

(OUTPUT)

TYP

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

3.5

0.5

5.8

0.5

4.7

0.5

3.5

0.5

tPHL

3.5

0.5

5.8

0.5

4.7

0.5

3.5

0.5

tPLH

2.7

0.5

4.3

0.5

3.9

0.5

3.5

0.5

3.4

tPHL

2.7

0.5

4.3

0.5

3.9

0.5

3.5

0.5

3.4

tPZH

2.5

0.5

5.4

0.5

5.3

0.5

5.2

0.5

5.2

tPZL

2.5

0.5

5.4

0.5

5.3

0.5

5.2

0.5

5.2

tPZH

4.8

0.5

9.6

0.5

7.6

0.5

5.3

0.5

4.3

tPZL

4.8

0.5

9.6

0.5

7.6

0.5

5.3

0.5

4.3

tPHZ

1.1

5.2

1.1

5.2

1.1

5.2

1.1

5.2

tPLZ

1.1

5.2

1.1

5.2

1.1

5.2

1.1

5.2

tPHZ

4.7

1.2

8.2

1.2

6.9

5.3

tPLZ

4.7

1.2

8.2

1.2

6.9

5.3

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

switching characteristics over recommended operating free-air temperature range,
V

CCA

= 3.3 V

0.3 V (see Figure 1)

PARAMETER

FROM

(INPUT)

(OUTPUT)

VCCB = 1.2 V

VCCB = 1.5 V

0.1 V

VCCB = 1.8 V

0.15 V

VCCB = 2.5 V

0.2 V

VCCB = 3.3 V

0.3 V

UNIT

PARAMETER

(INPUT)

(OUTPUT)

TYP

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

3.4

0.5

5.7

0.5

4.6

0.5

3.4

0.5

2.9

tPHL

3.4

0.5

5.7

0.5

4.6

0.5

3.4

0.5

2.9

tPLH

3.3

0.5

3.9

0.5

3.5

0.5

2.9

tPHL

3.3

0.5

3.9

0.5

3.5

0.5

2.9

tPZH

2.2

0.5

4.4

0.5

4.3

0.5

4.2

0.5

4.1

tPZL

2.2

0.5

4.4

0.5

4.3

0.5

4.2

0.5

4.1

tPZH

4.7

9.6

0.5

7.5

0.5

5.1

0.5

4.1

tPZL

4.7

9.6

0.5

7.5

0.5

5.1

0.5

4.1

tPHZ

3.4

0.8

tPLZ

3.4

0.8

tPHZ

4.6

1.2

8.1

1.2

6.7

5.1

0.8

tPLZ

4.6

1.2

8.1

1.2

6.7

5.1

0.8

operating characteristics, T

= 25

PARAMETER

TEST

CONDITIONS

VCCA =

VCCB = 1.2 V

VCCA =

VCCB = 1.5 V

VCCA =

VCCB = 1.8 V

VCCA =

VCCB = 2.5 V

VCCA =

VCCB = 3.3 V

UNIT

PARAMETER

CONDITIONS

TYP

UNIT

A to B

Outputs
Enabled

CpdA

A to B

Outputs
Disabled

CL = 0,

f = 10 MHz,

CpdA

B to A

Outputs
Enabled

f = 10 MHz,

tr = tf =1 ns

B to A

Outputs
Disabled

A to B

Outputs
Enabled

CpdB

A to B

Outputs
Disabled

CL = 0,

f = 10 MHz,

CpdB

B to A

Outputs
Enabled

f = 10 MHz,

tr = tf =1 ns

B to A

Outputs
Disabled

Power-dissipation capacitance per transceiver

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

TYPICAL CHARACTERISTICS

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

= 25

C, V

CCA

= 1.2 V

Figure 1

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

t PLH

- ns

Figure 2

t PHL

- ns

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

= 25

C, V

CCA

= 1.5 V

Figure 3

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

t PLH

- ns

Figure 4

t PHL

- ns

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

= 25

C, V

CCA

= 1.8 V

Figure 5

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

t PLH

- ns

Figure 6

t PHL

- ns

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE

= 25

C, V

CCA

= 2.5 V

Figure 7

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

t PLH

- ns

Figure 8

t PHL

- ns

CL - pF

VCCB = 1.8 V

VCCB = 2.5 V
VCCB = 3.3 V

VCCB = 1.5 V

VCCB = 1.2 V

SN74AVC20T245

20 BIT DUAL SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3 STATE OUTPUTS

SCES566F - MAY 2004 - REVISED APRIL 2005

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

VOH

VOL

From Output

Under Test

(see Note A)

LOAD CIRCUIT

VCCO

Open

GND

tPLH

tPHL

Output

Control

(low-level

enabling)

Output

Waveform 1

S1 at 2

VCCO

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

tPZL

tPZH

tPLZ

tPHZ

VCCA/2

VCCI/2

VCCI

0 V

VCCO/2

VOH

VOL

0 V

VCCO/2

VOL + VTP

VCCO/2

VOH - VTP

0 V

VCCI

0 V

VCCI/2

Input

VCCA

VCCO

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

VOLTAGE WAVEFORMS

PULSE DURATION

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

Output

Input

tpd

tPLZ/tPZL

tPHZ/tPZH

Open

VCCO

GND

TEST

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR

10 MHz, ZO = 50

, dv/dt

1 V/ns.

D. The outputs are measured one at a time, with one transition per measurement.

E. tPLZ and tPHZ are the same as tdis.

F. tPZL and tPZH are the same as ten.

G. tPLH and tPHL are the same as tpd.

H. VCCI is the VCC associated with the input port.

I. VCCO is the VCC associated with the output port.

1.2 V

1.5 V

0.1 V

1.8 V

0.15 V

2.5 V

0.2 V

3.3 V

0.3 V

2 k

VCCO

0.1 V
0.1 V

0.15 V
0.15 V

0.3 V

VTP

15 pF
15 pF
15 pF
15 pF
15 pF

Figure 11. Load Circuit and Voltage Waveforms

PACKAGING INFORMATION

Orderable Device

Status

(1)

Package

Type

Package

Drawing

Pins Package

Qty

Eco Plan

(2)

Lead/Ball Finish

MSL Peak Temp

(3)

74AVC20T245DGGRE4

ACTIVE

TSSOP

DGG

2000 Green (RoHS &

no Sb/Br)

CU NIPDAU

Level-1-260C-UNLIM

74AVC20T245DGVRE4

ACTIVE

TVSOP

DGV

2000 Green (RoHS &

no Sb/Br)

CU NIPDAU

Level-1-260C-UNLIM

SN74AVC20T245DGG

PREVIEW

TSSOP

DGG

Green (RoHS &

no Sb/Br)

CU NIPDAU

Level-1-260C-UNLIM

SN74AVC20T245DGGR

ACTIVE

TSSOP

DGG

2000 Green (RoHS &

no Sb/Br)

CU NIPDAU

Level-1-260C-UNLIM

SN74AVC20T245DGVR

ACTIVE

TVSOP

DGV

2000 Green (RoHS &

no Sb/Br)

CU NIPDAU

Level-1-260C-UNLIM

SN74AVC20T245GQLR

ACTIVE

VFBGA

GQL

1000

TBD

SNPB

Level-1-240C-UNLIM

SN74AVC20T245ZQLR

ACTIVE

VFBGA

ZQL

1000 Green (RoHS &

no Sb/Br)

SNAGCU

Level-1-260C-UNLIM

(1)

The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.

(2)

Eco

Plan

The

planned

eco-friendly

classification:

Pb-Free

(RoHS)

Green

(RoHS

Sb/Br)

please

check

http://www.ti.com/productcontent

for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.

PACKAGE OPTION ADDENDUM

www.ti.com

4-Oct-2005

Addendum-Page 1

MECHANICAL DATA

MPDS006C FEBRUARY 1996 REVISED AUGUST 2000

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

DGV (R-PDSO-G**)

PLASTIC SMALL-OUTLINE

24 PINS SHOWN

3,70

3,50

4,90

5,10

DIM

PINS **

4073251/E 08/00

1,20 MAX

Seating Plane

0,05

0,15

0,25

0,50

0,75

0,23

0,13

4,30

4,50

0,16 NOM

Gage Plane

7,90

7,70

4,90

5,10

3,70

3,50

A MAX

A MIN

6,60
6,20

11,20

11,40

9,60

9,80

0,08

0,07

0,40

 8

NOTES: A. All linear dimensions are in millimeters.

B. This drawing is subject to change without notice.

C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side.
D. Falls within JEDEC: 24/48 Pins MO-153

14/16/20/56 Pins MO-194

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