HM62256B Series
AC Characteristics
(Ta = 0 to +70°C, V
CC
= 5.0 V
±
10%)
Test Conditions
•
Input pulse levels: 0.8 V to 2.4 V
•
Input rise and fall time: 5 ns
•
Input and output timing reference levels: 1.5 V
•
Output load: 1 TTL Gate + C
L
(50 pF) (HM62256B-5)
1 TTL Gate + C
L
(100 pF) (HM62256B-7/8)
(Including scope & jig)
Read Cycle
HM62256B
-5
Parameter
Read cycle time
Address access time
Chip select to access time
Output enable to output valid
Chip select to output in low-Z
Output enable to output in low-Z
Chip deselect to output in high-Z
Output disable to output in high-Z
Output hold from address change
Symbol
t
RC
t
AA
t
ACS
t
OE
t
CLZ
t
OLZ
t
CHZ
t
OHZ
t
OH
Min
55
—
—
—
5
5
0
0
5
Max
—
55
55
35
—
—
20
20
—
-7
Min
70
—
—
—
10
5
0
0
5
Max
—
70
70
40
—
—
25
25
—
-8
Min
85
—
—
—
10
5
0
0
5
Max
—
85
85
45
—
—
30
30
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
2
2
1, 2
1, 2
Notes
7
HITACHI [ HITACHI SEMICONDUCTOR ]
