U634H256D1A45 View Datasheet(PDF) - Zentrum Mikroelektronik Dresden AG
Part Name
Description
Manufacturer
U634H256D1A45 Datasheet PDF : 14 Pages
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Recommended
Operating Conditions
Power Supply Voltageb
Input Low Voltage
Input High Voltage
U634H256
Symbol
Conditions
VCC
VIL
-2 V at Pulse Width
10 ns permitted
VIH
Min.
4.5
-0.3
2.2
Max.
5.5
0.8
VCC+0.3
Unit
V
V
V
DC Characteristics
Operating Supply Currentc
Symbol
Conditions
ICC1 VCC = 5.5 V
VIL = 0.8 V
VIH = 2.2 V
tc
= 25 ns
tc
= 35 ns
tc
= 45 ns
C-Type
K-Type A/M-Type
Unit
Min. Max. Min. Max. Min. Max.
95
100
- mA
75
80
80 mA
65
70
- mA
Average Supply Current during ICC2 VCC = 5.5 V
STOREc
E ≤ 0.2 V
6
7
7 mA
W ≥ VCC-0.2 V
VIL ≤ 0.2 V
VIH ≥ VCC-0.2 V
Average Supply Current during ICC4 VCC = 4.5 V
4
4
4 mA
PowerStore Cycle
VIL = 0.2 V
VIH ≥ VCC-0.2 V
Standby Supply Currentd
(Cycling TTL Input Levels)
ICC(SB)1 VCC = 5.5 V
E
= VIH
tc
= 25 ns
tc
= 35 ns
tc
= 45 ns
40
42
- mA
36
38
38 mA
33
35
- mA
Operating Supply Current
ICC3 VCC = 5.5 V
20
20
20 mA
at tcR = 200 nsc
W ≥ VCC-0.2 V
(Cycling CMOS Input Levels)
VIL ≤ 0.2 V
VIH ≥ 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 ≤ 0.2 V
VIH ≥ 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.
ICC2 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.
April 21, 2004
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