P R E L I M I N A R Y
SRAM DATA RETENTION
Parameter
Symbol
Parameter Description
Min
Typ
Max
3.3
15
Unit
V
Test Setup
VDR
VCC for Data Retention
Data Retention Current
CS1#s ≥ VCC – 0.2 V (Note 1)
1.5
VCC = 3.0 V, CE1#s ≥ VCC – 0.2 V
(Note 1)
1.0
(Note 2)
IDR
µA
tSDR
tRDR
Data Retention Set-Up Time
Recovery Time
0
ns
ns
See data retention waveforms
tRC
Notes:
1. CE1#s ≥ VCC – 0.2 V, CE2s ≥ VCC – 0.2 V (CE1#s controlled) or CE2s ≤ 0.2 V (CE2s controlled), CIOs = VSS or VCC
.
2. Typical values are not 100% tested.
Data Retention Mode
tRDR
tSDR
VCC
2.7V
2.2V
VDR
CE1#s ≥ VCC
-0.2 V
CE1#s
GND
Figure 33. CE1#s Controlled Data Retention Mode
Data Retention Mode
VCC
2.7 V
CE2s
tSDR
tRDR
VDR
<
CE2s
0.2 V
0.4 V
GND
Figure 34. CE2s Controlled Data Retention Mode
62
Am41DL32x8G
September 5, 2002