HM628128A Series
131,072-word
8-bit High Speed CMOS Static RAM
Rev. X
January 1995
The Hitachi HM628128A is a CMOS static RAM
organized 128 kword
8 bit. It realizes higher
density, higher performance and low power
consumption by employing 0.8 m Hi-CMOS
process technology.
It offers low power standby power dissipation;
therefore, it is suitable for battery back-up systems.
The device, packaged in a 525-mil SOP (460-mil
body SOP) or a 600-mil plastic DIP, or a 8
20
mm TSOP with thickness of 1.2 mm, is available
for high density mounting. TSOP package is
suitable for cards, and reverse type TSOP is also
provided.
Features
High speed
-- Fast access time: 55/70/85/100 ns (max)
Low power
-- Active: 75 mW (typ)
-- Standby: 10 W (typ)
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
2 chip selection for battery back up
ADE-XXX-XXX
Pin Arrangement
3
HM628128A Series
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
NC
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
V
SS
V
A15
CS2
WE
A13
A8
A9
A11
OE
A10
CS1
I/O7
I/O6
I/O5
I/O4
I/O3
CC
(Top View)
HM628128ALP/ALFP Series
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
A4
A5
A6
A7
A12
A14
A16
NC
V
A15
CS2
WE
A13
A8
A9
A11
SS
A3
A2
A1
A0
I/O0
I/O1
I/O2
V
I/O3
I/O4
I/O5
I/O6
I/O7
CS1
A10
OE
CC
(Top View)
HM628128ALT Series
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
A11
A9
A8
A13
WE
CS2
A15
V
NC
A16
A14
A12
A7
A6
A5
A4
SS
OE
A10
CS1
I/O7
I/O6
I/O5
I/O4
I/O3
V
I/O2
I/O1
I/O0
A0
A1
A2
A3
CC
(Top View)
HM628128ALR Series
Pin Description
Pin name
Function
A0 A16
Address
I/O0 I/O7
Input/output
CS1
Chip select 1
CS2
Chip select 2
WE
Write enable
Pin name
Function
OE
Output enable
NC
No connection
V
CC
Power supply
V
SS
Ground
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Supply voltage relative to V
SS
V
CC
0.5 to +7.0
V
Voltage on any pin relative to V
SS
*1
V
T
0.5
*2
to V
CC
+ 0.3
*3
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. With respect to V
SS
2. 3.0 V for pulse half-width
30 ns
3. Maximum voltage is 7.0V.
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 voltage
V
IH
2.2
--
V
CC
+ 0.3
V
(HM628128A-7/8/10)
V
IL
0.3
*1
--
0.8
V
Input voltage
V
IH
2.4
--
V
CC
+ 0.3
V
(HM628128A-5)
V
IL
0.3
*1
--
0.8
V
Note:
1. 3.0 V for pulse half-width
30 ns
5
HM628128A Series
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