The Hitachi HM62256A is a CMOS static RAM
organized 32-kword
8-bit. It realizes higher
performance and low power consumption by
employing 0.8 m Hi-CMOS process technology.
The device, packaged in a 8
14 mm TSOP with
thickness of 1.2 mm, 450-mil SOP (foot print pitch
width), 600-mil plastic DIP, or 300-mil plastic DIP,
is available for high density mounting. TSOP
package is suitable for cards, and reverse type
TSOP is also provided. It offers low power
standby power dissipation; therefore, it is suitable
for battery back up system.
Features
High speed: Fast Access time 85/100/120/150 ns
(max)
Low Power
Standby: 5 W (typ) (L/L-SL version)
Operation: 40 mW (typ) (f = 1 MHz)
Single 5 V supply
Completely static memory
No clock or timing strobe required
Equal access and cycle times
Common data input and output: Three state
output
Directly TTL compatible: All inputs and outputs
Capability of battery back up operation
Ordering Information
Type No.
Access time Package
--------------------------------------------
HM62256AP-8
85 ns
600-mil
HM62256AP-10
100 ns
28-pin
HM62256AP-12
120 ns
plastic DIP
HM62256AP-15
150 ns
(DP-28)
--------------------------------
HM62256ALP-8
85 ns
HM62256ALP-10
100 ns
HM62256ALP-12
120 ns
HM62256ALP-15
150 ns
--------------------------------
HM62256ALP-8SL
85 ns
HM62256ALP-10SL
100 ns
HM62256ALP-12SL
120 ns
HM62256ALP-15SL
150 ns
--------------------------------------------
HM62256ASP-8
85 ns
300-mil
HM62256ASP-10
100 ns
28-pin
HM62256ASP-12
120 ns
plastic DIP
HM62256ASP-15
150 ns
(DP-28NA)
--------------------------------
HM62256ALSP-8
85 ns
HM62256ALSP-10
100 ns
HM62256ALSP-12
120 ns
HM62256ALSP-15
150 ns
--------------------------------
HM62256ALSP-8SL
85 ns
HM62256ALSP-10SL 100 ns
HM62256ALSP-12SL 120 ns
HM62256ALSP-15SL 150 ns
--------------------------------------------
HM62256AFP-8T
85 ns
450-mil
HM62256AFP-10T
100 ns
28-pin
HM62256AFP-12T
120 ns
plastic SOP
HM62256AFP-15T
150 ns
(FP-28DA)
--------------------------------
HM62256ALFP-8T
85 ns
HM62256ALFP-10T
100 ns
HM62256ALFP-12T
120 ns
HM62256ALFP-15T
150 ns
--------------------------------
HM62256ALFP-8SLT
85 ns
HM62256ALFP-10SLT 100 ns
HM62256ALFP-12SLT 120 ns
HM62256ALFP-15SLT 150 ns
--------------------------------------------
1
HM62256A Series
Maintenance only
32,768-word
8-bit High Speed CMOS Static RAM
Note: This device is not available for new application.
TSOP Series
Type No.
Access time Package
--------------------------------------------
HM62256ALT-8
85 ns
8 mm
14 mm
HM62256ALT-10
100 ns
32-pin TSOP
HM62256ALT-12
120 ns
(normal type)
HM62256ALT-15
150 ns
(TFP-32DA)
------------------------------
HM62256ALT-8SL
85 ns
HM62256ALT-10SL 100 ns
HM62256ALT-12SL 120 ns
HM62256ALT-15SL 150 ns
--------------------------------------------
Pin Arrangement
Type No.
Access time Package
--------------------------------------------
HM62256ALR-8
85 ns
8 mm
14 mm
HM62256ALR-10
100 ns
32-pin TSOP
HM62256ALR-12
120 ns
(reverse type)
HM62256ALR-15
150 ns
(TFP-32DAR)
------------------------------
HM62256ALR-8SL
85 ns
HM62256ALR-10SL 100 ns
HM62256ALR-12SL 120 ns
HM62256ALR-15SL 150 ns
--------------------------------------------
HM62256AP/AFP/ASP Series
HM62256AT Series
HM62256AR Series
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
V
SS
V
WE
A13
A8
A9
A11
OE
A10
CS
I/O7
I/O6
I/O5
I/O4
I/O3
CC
(Top view)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
OE
A11
NC
A9
A8
A13
WE
V
A14
A12
A7
A6
A5
NC
A4
A3
CC
A10
CS
NC
I/O7
I/O6
I/O5
I/O4
I/O3
V
I/O2
I/O1
I/O0
A0
NC
A1
A2
SS
(Top view)
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
A3
A4
NC
A5
A6
A7
A12
A14
V
WE
A13
A8
A9
NC
A11
OE
A2
A1
NC
A0
I/O0
I/O1
I/O2
V
I/O3
I/O4
I/O5
I/O6
I/O7
NC
CS
A10
SS
(Top view)
CC
2
HM62256A Series
HM62256A Series
Pin Description
Symbol
Function
--------------------------------------------
A0 A14
Address
--------------------------------------------
I/O0 I/O7
Input/output
--------------------------------------------
CS
Chip select
--------------------------------------------
WE
Write enable
--------------------------------------------
Block Diagram
A5
A4
A3
A11
A12
A9
A8
A7
A6
I/O0
I/O7
CS
WE
OE
A0 A1 A2 A10
A14
A13
V
V
CC
SS
Row
Decoder
Memory Matrix
512 512
Column I/O
Column Decoder
Input
Data
Control
Timing Pulse Generator
Read/Write Control
Symbol
Function
--------------------------------------------
OE
Output enable
--------------------------------------------
NC
No connection
--------------------------------------------
V
CC
Power supply
--------------------------------------------
V
SS
Ground
--------------------------------------------
3
HM62256A Series
HM62256A Series
Function Table
WE
CS
OE
Mode
V
CC
current
I/O pin
Ref. cycle
----------------------------------------------------------------------------------------------
X
H
X
Not selected
I
SB
, I
SB1
High-Z
--
----------------------------------------------------------------------------------------------
H
L
H
Output disable
I
CC
High-Z
--
----------------------------------------------------------------------------------------------
H
L
L
Read
I
CC
Dout
Read cycle (1)(3)
----------------------------------------------------------------------------------------------
L
L
H
Write
I
CC
Din
Write cycle (1)
----------------------------------------------------------------------------------------------
L
L
L
Write
I
CC
Din
Write cycle (2)
----------------------------------------------------------------------------------------------
Note:
X: H or L
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
----------------------------------------------------------------------------------------------
Voltage on any pin relative to V
SS
V
T
0.5
*1
to +7.0
V
----------------------------------------------------------------------------------------------
Power dissipation
P
T
1.0
W
----------------------------------------------------------------------------------------------
Operating temperature
Topr
0 to +70
C
----------------------------------------------------------------------------------------------
Storage temperature
Tstg
55 to +125
C
----------------------------------------------------------------------------------------------
Storage temperature under bias
Tbias
10 to +85
C
----------------------------------------------------------------------------------------------
Note:
1. V
T
min = 3.0 V for pulse half-width
50 ns
Recommended DC Operating Conditions (Ta = 0 to +70C)
Parameter
Symbol
Min
Typ
Max
Unit
----------------------------------------------------------------------------------------------
Supply voltage
V
CC
4.5
5.0
5.5
V
--------------------------------------------------------------
V
SS
0
0
0
V
----------------------------------------------------------------------------------------------
Input high (logic 1) voltage
V
IH
2.2
--
6.0
V
----------------------------------------------------------------------------------------------
Input low (logic 0) voltage
V
IL
0.5
*1
--
0.8
V
----------------------------------------------------------------------------------------------
Note:
1. V
IL
min = 3.0 V for pulse half-width
50 ns
4
HM62256A Series
HM62256A Series
DC Characteristics (Ta = 0 to +70C, V
CC
= 5 V 10%, V
SS
= 0 V)
Parameter
Symbol
Min
Typ
*1
Max
Unit
Test conditions
----------------------------------------------------------------------------------------------
Input leakage current
|I
LI
|
--
--
1
A
Vin = V
SS
to V
CC
----------------------------------------------------------------------------------------------
Output leakage current
|I
LO
|
--
--
1
A
CS
= V
IH
or
OE
= V
IH
or
WE
= V
IL
,
V
I/O
= V
SS
to V
CC
----------------------------------------------------------------------------------------------
Operating V
CC
current
I
CC
--
6
15
mA
CS
= V
IL
, others = V
IH
/V
IL
Iout = 0 mA
------------------------------------------------------------------------------------
HM62256A-8
I
CC1
--
33
50
mA
min cycle, duty = 100%, I
I/O
= 0 mA
HM62256A-10
--
30
50
CS
= V
IL
, others = V
IH
/V
IL
HM62256A-12
--
27
45
HM62256A-15
--
24
40
------------------------------------------------------------------------------------
I
CC2
--
5
15
mA
Cycle time = 1s, I
I/O
= 0 mA
CS
= V
IL
, V
IH
= V
CC
, V
IL
= 0
----------------------------------------------------------------------------------------------
Standby V
CC
current
I
SB
--
0.3
2
mA
CS
= V
IH
----------------------------------------------------------------------
I
SB1
--
0.01
1
mA
Vin
0 V
----------------------------
CS
V
CC
0.2 V
--
0.3
*2
100
*2
A
----------------------------
--
0.3
*3
50
*3
A
----------------------------------------------------------------------------------------------
Output low voltage
V
OL
--
--
0.4
V
I
OL
= 2.1 mA
----------------------------------------------------------------------------------------------
Output high voltage
V
OH
2.4
--
--
V
I
OH
= 1.0 mA
----------------------------------------------------------------------------------------------
Notes: 1. Typical values are at V
CC
= 5.0 V, Ta = +25C and not guaranteed.
2. This characteristics is guaranteed only for L-version.
3. This characteristics is guaranteed only for L-SL version.
Capacitance (Ta = 25C, f = 1 MHz)
*1
Parameter
Symbol
Min
Typ
Max
Unit
Test conditions
----------------------------------------------------------------------------------------------
Input capacitance
Cin
--
--
6
pF
Vin = 0 V
----------------------------------------------------------------------------------------------
Input/output capacitance
C
I/O
--
--
8
pF
V
I/O
= 0 V
----------------------------------------------------------------------------------------------
Note:
1. This parameter is sampled and not 100% tested.
5
HM62256A Series
HM62256A Series
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