at60142f ATMEL Corporation, at60142f Datasheet - Page 6

• Manufacturer Part Number: at60142f
• Description: Rad Hard 512k X 8 Very Low Power Cmos Sram
• Manufacturer: ATMEL Corporation

Data Retention Mode
Data Retention Characteristics
4408F–AERO–07/07
1.
2.
Atmel CMOS RAM's are designed with battery backup in mind. Data retention voltage
and supply current are guaranteed over temperature. The following rules insure data
retention:
1. During data retention chip select CS must be held high within
2. Output Enable (OE) should be held high to keep the RAM outputs high imped-
3. During power-up and power-down transitions CS and OE must be kept between
4. The RAM can begin operation > t
Figure 1. Data Retention Timing
Parameter
V
t
t
I
CDR
R
CCDR
CCDR
ance, minimizing power dissipation.
V
voltages (3V).
CC
(2)
T
CS = V
+ 0.3V and 70% of
AVAV
= Read cycle time.
CC
Description
V
retention
Chip deselect
to data
retention time
Operation
recovery time
Data retention
current
, V
CC
IN
for data
= GND/V
V
CC
CC
.
.
t
AVAV
Min
2.0
0.0
R
–
ns after
(1)
Typ T
V
CC
0.700
reaches the minimum operation
A
–
–
–
= 25°C
V
Max
CC
1.3
–
–
–
to
V
CC
-0.2V.
Unit
mA
ns
ns
V
6