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U634H256D1C45 Datasheet(PDF) 4 Page - Zentrum Mikroelektronik Dresden AG

Part # U634H256D1C45
Description  POWERSTORE 32K X 8 NVSRAM
Download  14 Pages
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Manufacturer  ZMD [Zentrum Mikroelektronik Dresden AG]
Direct Link  http://www.zmdi.com
Logo ZMD - Zentrum Mikroelektronik Dresden AG

U634H256D1C45 Datasheet(HTML) 4 Page - Zentrum Mikroelektronik Dresden AG

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4
April 21, 2004
U634H256
DC Characteristics
Symbol
Conditions
Min.
Max.
Unit
Output High Voltage
Output Low Voltage
VOH
VOL
VCC
IOH
IOL
= 4.5 V
=-4 mA
= 8 mA
2.4
0.4
V
V
Output High Current
Output Low Current
IOH
IOL
VCC
VOH
VOL
= 4.5 V
= 2.4 V
= 0.4 V
8
-4
mA
mA
Input Leakage Current
High
Low
IIH
IIL
VCC
VIH
VIL
= 5.5 V
= 5.5 V
=
0 V
-1
1
µA
µA
Output Leakage Current
High at Three-State- Output
Low at Three-State- Output
IOHZ
IOLZ
VCC
VOH
VOL
= 5.5 V
= 5.5 V
=
0 V
-1
1
µA
µA
No.
Switching Characteristics
Read Cycle
Symbol
25
35
45
Unit
Alt.
IEC
Min. Max. Min. Max. Min. Max.
1 Read Cycle Timef
tAVAV
tcR
25
35
45
ns
2 Address Access Time to Data Validg
tAVQV
ta(A)
25
35
45
ns
3 Chip Enable Access Time to Data Valid
tELQV
ta(E)
25
35
45
ns
4 Output Enable Access Time to Data Valid
tGLQV
ta(G)
10
15
20
ns
5E HIGH to Output in High-Zh
tEHQZ
tdis(E)
10
13
15
ns
6G HIGH to Output in High-Zh
tGHQZ
tdis(G)
10
13
15
ns
7E LOW to Output in Low-Z
tELQX
ten(E)
555
ns
8G LOW to Output in Low-Z
tGLQX
ten(G)
000
ns
9 Output Hold Time after Address Change
tAXQX
tv(A)
333
ns
10 Chip Enable to Power Activee
tELICCH
tPU
000
ns
11 Chip Disable to Power Standbyd, e
tEHICCL
tPD
25
35
45
ns
SRAM Memory Operations
e: Parameter guaranteed but not tested.
f:
Device is continuously selected with E and G both LOW.
g: Address valid prior to or coincident with E transition LOW.
h: Measured
± 200 mV from steady state output voltage.


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