HM628512 Series
AC Characteristics
(Ta = 0 to +70°C, V
CC
= 5 V
±
10%, unless otherwise noted.)
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
(100 pF) (HM628512-7A/7)
1 TTL Gate + C
L
(50 pF) (HM628512-5)
(Including scope & jig)
Read Cycle
HM628512
-5
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
Symbol
t
RC
t
AA
t
CO
t
OE
t
LZ
t
OLZ
Min
55
—
—
—
10
5
0
0
10
Max
—
55
55
25
—
—
20
20
—
-7A
Min
65
—
—
—
10
5
0
0
10
Max
—
60
65
30
—
—
20
20
—
-7
Min
70
—
—
—
10
5
0
0
10
Max
—
70
70
35
—
—
25
25
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
2
2
1, 2
1, 2
Notes
Chip deselection to output in high-Z t
HZ
Output disable to output in high-Z
Output hold from address change
t
OHZ
t
OH
Notes: 1. t
HZ
and t
OHZ
are defined as the time at which the outputs achieve the open circuit conditions and are
not referred to output voltage levels.
2. This parameter is sampled and not 100% tested.
7
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