upd43256b Renesas Electronics Corporation., upd43256b Datasheet - Page 17

• Manufacturer Part Number: upd43256b
• Description: 256k-bit Cmos Static Ram 32k-word By 8-bit
• Manufacturer: Renesas Electronics Corporation.

Low V
Notes 1. 3
Data Retention Timing Chart
Note A version : 3.0 V, B version : 2.7 V
Remark The other pins (Address, /OE, /WE, I/O) can be in high impedance state.
Data retention supply voltage
Data retention supply current
Chip deselection
to data retention mode
Operation recovery time
CC
2. 2
V
CCDR
Parameter
V
V
Data Retention Characteristics (T
IL
4.5 V
IH
μ
(MAX.)
μ
(MIN.)
(MIN.)
A (T
A (T
GND
V
Note
CC
A
A
≤
≤
40 °C)
40 °C), 1
Symbol
V
t
I
CDR
CCDR
t
μ
CCDR
CDR
t
R
A (T
/CS
A
/CS ≥ V
V
≤
CC
25 °C)
= 3.0 V, /CS ≥ V
CC
Test Condition
− 0.2 V
Data Sheet M10770EJEV0DS
Data retention mode
A
/CS ≥ V
= 0 to 70 °C)
CC
− 0.2 V
CC
– 0.2 V
MIN.
2.0
0
5
μ
PD43256B-xxL
TYP.
0.5
20
MAX.
5.5
Note1
t
R
MIN.
2.0
0
5
μ
μ
μ
PD43256B-xxLL
PD43256B-Axx
PD43256B-Bxx
μ
PD43256B
TYP.
0.5
MAX.
7
5.5
Note2
17
Unit
ms
μ
ns
V
A