U634H256 Datasheet, PDF (3/15 Pages) Zentrum Mikroelektronik Dresden AG – POWERSTORE 32K X 8 NVSRAM

Recommended
Operating Conditions
Power Supply Voltage^b
Input Low Voltage
Input High Voltage
U634H256
Symbol
Conditions
V_CC
V_IL
-2 V at Pulse Width
10 ns permitted
V_IH
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^c
Symbol
Conditions
I_CC1 V_CC = 5.5 V
V_IL = 0.8 V
V_IH = 2.2 V
t_c
= 25 ns
t_c
= 35 ns
t_c
= 45 ns
C-Type
K-Type
A-Type
Unit
Min. Max. Min. Max. Min. Max.
95
100
- mA
75
80
80 mA
65
70
- mA
Average Supply Current during I_CC2 V_CC = 5.5 V
STORE^c
E ≤ 0.2 V
6
7
7 mA
W ≥ V_CC-0.2 V
V_IL ≤ 0.2 V
V_IH ≥ V_CC-0.2 V
Average Supply Current during I_CC4 V_CC = 4.5 V
4
4
4 mA
PowerStore Cycle
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
t_c
= 35 ns
t_c
= 45 ns
40
42
- mA
36
38
38 mA
33
35
- mA
Operating Supply Current
I_CC3 V_CC = 5.5 V
20
20
20 mA
at t_cR = 200 ns^c
W ≥ V_CC-0.2 V
(Cycling CMOS Input Levels)
V_IL ≤ 0.2 V
V_IH ≥ V_CC-0.2 V
Standby Supply Curent^d
I_CC(SB) V_CC = 5.5 V
3
3
4 mA
(Stable CMOS Input Levels)
E
≥ V_CC-0.2 V
V_IL ≤ 0.2 V
V_IH ≥ V_CC-0.2 V
b: V_CC reference levels throughout this datasheet refer to V_CCX if that is where the power supply connection is made, or V_CAP if V_CCX is con-
nected to ground.
c: I_CC1 and I_CC3 are depedent 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.
I_CC2 is the average current required for the duration of the STORE cycle (STORE Cycle Time).
d: Bringing E ≥ V_IH will not produce standby current levels until any nonvolatile cycle in progress has timed out. See MODE SELECTION able.
The current I_CC(SB)1 is measured for WRITE/READ - ratio of 1/2.
August 15, 2006
STK Control #ML0048
3
Rev 1.1