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AL422
AL422B
January 23, 2001
7
7.4 AC Characteristics
(VDD =5V or 3.3V, Vss=0V, TAMB = 0 to 70°C)
3.3V application
5V application
Parameter
Min
Max
Min
Max
Unit
T
WC
WCK Cycle Time
20
1000
20
1000
ns
T
WPH
WCK High Pulse Width
7
-
7
-
ns
T
WPL
WCK Low Pulse Width
7
-
7
-
ns
T
RC
RCK Cycle Time
20
1000
20
1000
ns
T
RPH
RCK High Pulse Width
7
-
7
-
ns
T
RPL
RCK Low Pulse Width
7
-
7
-
ns
T
AC
Access Time
-
15
-
15
ns
T
OH
Output Hold Time
4
-
4
-
ns
T
HZ
Output High-Z Setup Time
3
15
4
15
ns
T
LZ
Output Low-Z Setup Time
3
15
4
15
ns
T
WRS
/WRST Setup Time
5
-
6
-
ns
T
WRH
/WRST Hold Time
2
-
3
-
ns
T
RRS
/RRST Setup Time
5
-
6
-
ns
T
RRH
/RRST Hold Time
2
-
3
-
ns
T
DS
Input Data Setup Time
5
-
6
-
ns
T
DH
Input Data Hold Time
2
-
3
-
ns
T
WES
/WE Setup Time
5
-
6
-
ns
T
WEH
/WE Hold Time
2
-
3
-
ns
T
WPW
/WE Pulse Width
10
-
10
-
ns
T
RES
/RE Setup Time
5
-
6
-
ns
T
REH
/RE Hold Time
2
-
3
-
ns
T
RPW
/RE Pulse Width
10
-
10
-
ns
T
OES
/OE Setup Time
5
-
6
-
ns
T
OEH
/OE Hold Time
2
-
3
-
ns
T
OPW
/OE Pulse Width
10
-
10
-
ns
T
TR
Transition Time
2
20
3
20
ns
CI
Input Capacitance
-
7
-
7
pF
CO
Output Capacitance
-
7
-
7
pF
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