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AC Characteristics (VCC = 5 V + 10%, Ta = 0 to +70°C, unless otherwise noted)
AC Test Conditions:
• Input pulse levels: VSS to 3.0 V
• Input rise and fall times: 5 ns
• Input and output timing reference levels: 1.5 V
• Output load: See figure
Output Load
Read Cycle
HM6268-25
HM6268-35
HM6268-45
—————— —————— ——————
Parameter
Symbol Min
Max
Min
Max
Min
Max
Unit
Read cycle time
tRC
25
—
35
—
45
—
ns
Address access time
tAA
—25
—
35
—45
ns
Chip select access time
tACS
—25
—
35
—45
ns
Output hold from address
tOH
5—
5—
5—
ns
change
Chip selection to output in low-Z
tLZ *1
10
—
10
—
10
—
ns
Chip deselection to output in
tHZ *1
015
0
20
020
ns
high-Z
Chip selection to power up time
tPU
0—
0—
0—
ns
Chip deselection to power down
tPD
—25
—
25
—30
ns
time
Note:
1. Transition is measured +200 mV from steady state voltage with load (B).
These parameters are sampled and not 100% tested.
4
HM6268 Series
HM6268 Series
Output load (A)
Output load (B)
(tHZ , tLZ, tWZ, and tOW)
Note: 1. Including scope and jig
5 V
480
Ω
30 pF *1
255
Ω
Dout
5 V
480
Ω
5 pF *1
255
Ω
Dout
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