Instruction Manual

Preliminary W24256
Publication Release Date: October 1999
- 7 - Revision A1
DATA RETENTION CHARACTERISTICS
(TA = 0
°
C to 70
°
C)
PARAMETER SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT
V
DD
for Data Retention V
DR
CS ≥
V
DD
-0.2V
2.0 - 5.5 V
Data Retention Current I
DDDR
CS ≥
V
DD
-0.2V, V
DD
= 3V
- - 20
µ
A
Chip Deselect to Data
Retention Time
T
CDR
See data retention waveform 0 - - nS
Operation Recovery Time T
R
T
RC
* - - nS
*
Read Cycle Time
DATA RETENTION WAVEFORM
T
CDR
V
DD
V
IH
T
R
V
IH
CS
V
DR
2V
=
>
- 0.2V
DD
VCS
=
>
0.9 DD
V
0.9
DDV
ORDERING INFORMATION
PART NO. ACCESS
TIME
(nS)
OPERATING
CURRENT MAX.
(
mA)
STANDBY
CURRENT MAX.
(
µ
A)
PACKAGE
W24256-70L 70 60 100 600 mil DIP
W24256-70LL 70 60 50 600 mil DIP
W24256S-70L 70 60 100 330 mil SOP
W24256S-70LL 70 60 50 330 mil SOP
W24256Q-70L 70 60 100 Standard type one TSOP
W24256Q-70LL 70 60 50 Standard type one TSOP
Notes:
1. Winbond reserves the right to make changes to its products without prior notice.
2. Purchasers are responsible for performing appropriate quality assurance testing on products intended for use in applications
where personal injury might occur as a consequence of product failure.