IS61C256AH 查看數據表（PDF） - Integrated Silicon Solution
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IS61C256AH Datasheet PDF : 8 Pages
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IS61C256AH
ISSI ®
READ CYCLE SWITCHING CHARACTERISTICS(1) (Over Operating Range)
Symbol Parameter
-10
-12
-15
-20
-25
Min. Max Min. Max. Min. Max. Min. Max. Min. Max. Unit
tRC Read Cycle Time
10 —
12 —
15 —
20 —
25 —
ns
tAA Address Access Time — 10
— 12
— 15
— 20
— 25
ns
tOHA Output Hold Time
2—
2—
2—
2—
2—
ns
tACE CE Access Time
— 10
— 12
— 15
— 20
— 25
ns
tDOE OE Access Time
—5
—5
—7
—8
—9
ns
OE tLZOE(2)
to Low-Z Output
0—
0—
0—
0—
0—
ns
OE tHZOE(2)
to High-Z Output — 5
—6
—7
—9
— 10
ns
CE tLZCE(2)
to Low-Z Output
2—
3—
3—
3—
3—
ns
CE tHZCE(2)
to High-Z Output — 5
—7
—8
—9
— 10
ns
CE tPU(3)
to Power-Up
0—
0—
0—
0—
0—
ns
CE tPD(3)
to Power-Down
— 10
— 12
— 15
— 18
— 20
ns
Notes:
1. Test conditions assume signal transition times of 5 ns or less, timing reference levels of 1.5V, input pulse levels of
0 to 3.0V and output loading specified in Figure 1.
2. Tested with the load in Figure 2. Transition is measured ±500 mV from steady-state voltage. Not 100% tested.
3. Not 100% tested.
AC TEST CONDITIONS
Parameter
Input Pulse Level
Input Rise and Fall Times
Input and Output Timing
and Reference Levels
Output Load
Unit
0V to 3.0V
3 ns
1.5V
See Figures 1 and 2
AC TEST LOADS
480 Ω
5V
OUTPUT
30 pF
Including
jig and
scope
Figure 1
255 Ω
4
480 Ω
5V
OUTPUT
5 pF
Including
jig and
scope
Figure 2
255 Ω
Integrated Silicon Solution, Inc. — 1-800-379-4774
SR020-1O
05/24/99
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