ST78C34 Exar Corporation, ST78C34 Datasheet - Page 11

• Manufacturer Part Number: ST78C34
• Description: General Purpose Parallel Printer Port With 83 Byte Fifo
• Manufacturer: Exar Corporation

AC ELECTRICAL CHARACTERISTICS
T
A
Symbol
=0° - 70° C, Vcc=5.0 V ± 10% unless otherwise specified.
Rev. 3.00
T
T
T
T
T
T
T
T
T
T
T
Tw
T
T
T
T
T
Tr
T
T
T
T
T
T
1
2
3
8
9
12
13
14
15
16
17
19
21
23
24
25
26
39
40
41
42
43
Clock high pulse duration
Clock low pulse duration
Clock rise/fall time
Chip select setup time
Chip select hold time
Data setup time
Data hold time
-IOW delay from chip select
-IOW strobe width
Chip select hold time from -IOW
Write cycle delay
Write cycle=T
Data hold time
-IOR delay from chip select
-IOR strobe width
Chip select hold time from -IOR
Read cycle delay
Read cycle=T
Delay from -IOR to data
-ACK pulse width
PD7 - PD0 setup time
PD7 - PD0 hold time
Delay from -ACK low to interrupt low
Delay from -IOR to reset interrupt
Parameter
23
15
+T
+T
25
17
6-13
Min
105
115
50
50
10
10
10
50
55
10
10
65
55
75
10
25
0
0
5
5
0
5
Limits
Typ
Max
10
35
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ST78C34
External clock
100 pF load
Conditions