HM62256 Hitachi Semiconductor, HM62256 Datasheet - Page 6

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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
6
AC Characteristics (Ta = 0 to +70°C, V
Test Conditions
• Input pulse levels: 0.8 V to 2.4 V
• Input and output timing refernce levels: 1.5 V
Read Cycle
Parameter
———————————————————————————————————————————————–
Read cycle time
———————————————————————————————————————————————–
Address access time
———————————————————————————————————————————————–
Chip select
access time
———————————————————————————————————————————————–
Output enable to
output valid
———————————————————————————————————————————————–
Chip selection to
output in low-Z
———————————————————————————————————————————————–
Output enable to
output in low-Z
———————————————————————————————————————————————–
Chip deselection to
output in high-Z
———————————————————————————————————————————————–
Output disable to
output in high-Z
———————————————————————————————————————————————–
Output hold from
address change
———————————————————————————————————————————————–
Symbol
t
t
t
t
t
t
t
t
t
RC
AA
ACS
OE
CLZ
OLZ
CHZ
OHZ
OH
HM62256A-8
—————– —————– —————– —————–
Min
85
10
5
0
0
5
Max
85
85
45
30
30
CC
HM62256A-10 HM62256A-12 HM62256A-15
Min
100
10
5
0
0
10
= 5 V ± 10%, unless otherwise noted.)
• Input rise and fall times: 5 ns
• Output load: 1 TTL Gate + C
Max
100
100
50
35
35
(Including scope & jig)
Min
120
10
5
0
0
10
Max
120
120
60
40
40
Min
150
10
5
0
0
10
HM62256A Series
150
150
70
50
50
Max
L
(100 pF)
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note
2
2
1, 2
1, 2

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