U631H256 Datasheet, PDF (3/13 Pages) List of Unclassifed Manufacturers – SoftStore 32K x 8 nvSRAM

Recommended
Operating Conditions
Power Supply Voltage
Input Low Voltage
Input High Voltage
Symbol
Conditions
V_CC
V_IL
-2 V at Pulse Width
10 ns permitted
V_IH
U631H256
Min.
4.5
-0.3
2.2
Max.
5.5
0.8
V_CC+0.3
Unit
V
V
V
DC Characteristics
Operating Supply Current^b
Symbol
Conditions
I_CC1 V_CC = 5.5 V
V_IL = 0.8 V
V_IH = 2.2 V
t_c
= 25 ns
C-Type
K-Type
Unit
Min. Max. Min. Max.
95
100 mA
Average Supply Current during I_CC2 V_CC = 5.5 V
6
STORE^c
E
≥ V_CC-0.2 V
W ≥ V_CC-0.2 V
V_IL ≤ 0.2 V
V_IH ≥ V_CC-0.2 V
7 mA
Average Supply Current
I_CC3 V_CC = 5.5 V
20
20 mA
at t_cR = 200 ns^b
W ≥ V_CC-0.2 V
(Cycling CMOS Input Levels)
V_IL ≤ 0.2 V
V_IH ≥ V_CC-0.2 V
Standby Supply Current^d
(Cycling TTL Input Levels)
I_CC(SB)1 V_CC = 5.5 V
E
≥ V_IH
t_c
= 25 ns
40
42 mA
Standby Supply Curent^d
I_CC(SB) V_CC = 5.5 V
1
(Stable CMOS Input Levels)
E
≥ V_CC-0.2 V
V_IL ≤ 0.2 V
V_IH ≥ V_CC-0.2 V
2 mA
b: I_CC1 and I_CC3 are dependent on output loading and cycle rate. The specified values are obtained with outputs unloaded
The current I_CC1 is measured for WRITE/READ - ratio of 1/2.
c: I_CC2 is the average current required for the duration of the STORE cycle (t_STORE).
d: Bringing E ≥ V_IH will not produce standby current levels until any nonvolatile cycle in progress has timed out.
The current I_CC(SB)1 is measured for WRITE/READ - ratio of 1/2.
March 31, 2006
STK Control #ML0043
3
Rev 1.0