U634H256
Recommended
Symbol
Conditions
Min.
Max.
Unit
Operating Conditions
Power Supply Voltageb
VCC
VIL
4.5
-0.3
2.2
5.5
0.8
V
V
V
-2 V at Pulse Width
10 ns permitted
Input Low Voltage
Input High Voltage
VIH
VCC+0.3
C-Type
K-Type
A/M-Type
DC Characteristics
Symbol
Conditions
Unit
Min. Max. Min. Max. Min. Max.
Operating Supply Currentc
ICC1
VCC = 5.5 V
VIL
VIH
= 0.8 V
= 2.2 V
tc
tc
tc
= 25 ns
= 35 ns
= 45 ns
95
75
65
100
80
-
80
-
mA
mA
mA
70
Average Supply Current during
STOREc
ICC2
VCC = 5.5 V
6
7
7
mA
E
≤ 0.2 V
W
≥ VCC-0.2 V
≤ 0.2 V
VIL
VIH
≥ VCC-0.2 V
Average Supply Current during
ICC4
VCC = 4.5 V
4
4
4
mA
PowerStore Cycle
VIL
VIH
= 0.2 V
≥ VCC-0.2 V
Standby Supply Currentd
(Cycling TTL Input Levels)
ICC(SB)1 VCC = 5.5 V
E
= VIH
tc
tc
tc
= 25 ns
= 35 ns
= 45 ns
40
36
33
42
38
35
-
38
-
mA
mA
mA
Operating Supply Current
at tcR = 200 nsc
ICC3
VCC = 5.5 V
20
20
20
mA
W
≥ VCC-0.2 V
(Cycling CMOS Input Levels)
VIL
VIH
≤ 0.2 V
≥ VCC-0.2 V
Standby Supply Curentd
ICC(SB) VCC = 5.5 V
3
3
4
mA
(Stable CMOS Input Levels)
E
≥ VCC-0.2 V
VIL
VIH
≤ 0.2 V
≥ VCC-0.2 V
b: VCC reference levels throughout this datasheet refer to VCCX if that is where the power supply connection is made, or VCAP if VCCX is con-
nected to ground.
c:
ICC1 and ICC3 are depedent on output loading and cycle rate. The specified values are obtained with outputs unloaded.
The current ICC1 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 ≥ VIH will not produce standby current levels until any nonvolatile cycle in progress has timed out. See MODE SELECTION able.
The current ICC(SB)1 is measured for WRITE/READ - ratio of 1/2.
3
April 21, 2004
ZMD [ Zentrum Mikroelektronik Dresden AG ]
