W24257 Datasheet, PDF (7/10 Pages) Winbond – 32K X 8 CMOS STATIC RAM

W24257
DATA RETENTION CHARACTERISTICS
(TA = 0 to 70° C for LL/L; -20 to 85° C for LE )
PARAMETER
VDD for Data Retention
Data Retention Current
Chip Deselect to Data Retention Time
Operation Recovery Time
SYM. TEST CONDITIONS MIN. TYP. MAX. UNIT
VDR #CS ≥ VDD -0.2V
2.0 -
-
V
IDDDR #CS ≥ VDD -0.2V LL/LE -
- 15 µA
VDD = 3V
L
-
- 30 µA
TCDR See data retention
0-
- nS
TR Waveform
TRC* -
- nS
TRC* = Read Cycle Time
DATA RETENTION WAVEFORM
V_DD
#CS
DATA RETENTION MODE
4.5V
T_{C D R}
VIH
VD R >= 2V
#CS1 _=> V_{D D -0.2V}
4.5V
TR
VIH
ORDERING INFORMATION
PART NO.
ACCESS OPERATING STANDBY
TIME CURRENT CURRENT
(nS)
MAX. (mA) MAX. (µA)
OPERATING
TEMP.
(°C)
PACKAGE
W24257S-70LL
70
70
15
0 to 70
330 mil SOP
W24257S-70L
70
70
30
0 to 70
330 mil SOP
W24257S-70LE
70
70
15
-20 to 85 330 mil SOP
W24257Q-70LL
70
70
15
0 to 70
Standard type one TSOP
W24257Q-70L
70
70
30
0 to 70
Standard type one TSOP
W24257Q-70LE
70
70
15
-20 to 85 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.
Publication Release Date: February 2001
-7-
Revision A16