WCFS0808C1E
AC Test Loads and Waveforms
R1 481
Ω
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
R2
255
Ω
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
R2
255
Ω
3.0V
10%
GND
≤
t
r
R1 481
Ω
ALL INPUT PULSES
90%
90%
10%
≤
t
r
C199–5
(a)
(b)
Equivalent to:
THÉVENIN EQUIVALENT
167
Ω
1.73V
OUTPUT
Data Retention Characteristics
(
Over the Operating Range)
Parameter
V
DR
t
CDR[1]
t
R [5]
Description
V
CC
for Data Retention
Chip Deselect to Data Retention Time V
CC
= V
DR
= 2.0V,
CE > V
CC
– 0.3V,
Operation Recovery Time
V
IN
> V
CC
– 0.3V or
V
IN
< 0.3V
Conditions
Min.
2.0
0
200
Max.
Unit
V
ns
µs
Data Retention Waveform
DATA RETENTION MODE
V
CC
3.0V
t
CDR
CE
V
DR
> 2V
3.0V
t
R
Note:
5. t
R
< 3 ns for the -12 and the -15 speeds. t
R
< 5 ns for the -20 and slower speeds
6. No input may exceed V
CC
+ 0.5V.
Page 3 of 10
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