HM62256 Hitachi Semiconductor, HM62256 Datasheet - Page 4

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HM62256

Manufacturer Part Number
HM62256
Description
32/768-word x 8-bit High Speed CMOS Static RAM
Manufacturer
Hitachi Semiconductor
Datasheet

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HM62256A Series
4
Function Table
WE
———————————————————————————————————————————————–
X
———————————————————————————————————————————————–
H
———————————————————————————————————————————————–
H
———————————————————————————————————————————————–
L
———————————————————————————————————————————————–
L
———————————————————————————————————————————————–
Note:
Absolute Maximum Ratings
Parameter
———————————————————————————————————————————————–
Voltage on any pin relative to V
———————————————————————————————————————————————–
Power dissipation
———————————————————————————————————————————————–
Operating temperature
———————————————————————————————————————————————–
Storage temperature
———————————————————————————————————————————————–
Storage temperature under bias
———————————————————————————————————————————————–
Note:
Recommended DC Operating Conditions (Ta = 0 to +70°C)
Parameter
———————————————————————————————————————————————–
Supply voltage
———————————————————————————————————————————————–
Input high (logic 1) voltage
———————————————————————————————————————————————–
Input low (logic 0) voltage
———————————————————————————————————————————————–
Note:
X: H or L
1. V
1. V
CS
H
L
L
L
L
T
IL
min = –3.0 V for pulse half-width ≤ 50 ns
min = –3.0 V for pulse half-width ≤ 50 ns
OE
X
H
L
H
L
SS
Mode
Not selected
Output disable
Read
Write
Write
Symbol
V
———————————————————————————————–
V
V
V
CC
SS
IH
IL
Symbol
V
P
Topr
Tstg
Tbias
T
T
Min
4.5
0
2.2
–0.5
V
I
I
I
I
I
SB
CC
CC
CC
CC
*1
CC
, I
current
SB1
Value
–0.5
1.0
0 to +70
–55 to +125
–10 to +85
Typ
5.0
0
*1
to +7.0
I/O pin
High-Z
High-Z
Dout
Din
Din
Max
5.5
0
6.0
0.8
HM62256A Series
Ref. cycle
Read cycle (1)–(3)
Write cycle (1)
Write cycle (2)
Unit
V
W
°C
°C
°C
Unit
V
V
V
V

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