XR16C872CQ EXAR [Exar Corporation], XR16C872CQ Datasheet - Page 48

• Manufacturer Part Number: XR16C872CQ
• Description: DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER
• Manufacturer: EXAR [Exar Corporation]

XR16C872
1284 Controller AC Electrical Characteristics
T
A
Symbol
=0° - 70°C (-40° - +85°C for Industrial grade packages), Vcc=3.3 - 5.0 V ± 10% unless otherwise specified.
Rev. 1.00
T20
T21
T22
T23
T24
T25
T26
T27
T28
T29
T30
T31
T32
T33
T34
T35
T36
T37
T38
T39
T40
T41
T42
T43
T44
T45
T46
T47
T48
T49
T50
PD7-PD0, STROBE#, AUTOFD#, INIT,
SLCTIN# delay from IOW# inactive
Interrupt delay from ACK#
Interrupt pre-charge pulse at release
TC pulse width
TC active to DRQx inactive
DRQx active to DACKx# active
DRQx inactive delay from DACKx#
active
PD7-PD0 setup to STROBE# active
STROBE# width
PD7-PD0 hold from STROBE# inactive
PD7-PD0 hold from BUSY inactive
STROBE# active to BUSY active
(handshake)
BUSY inactive to STROBE# active
(cycle delay)
PD7-PD0, AUTOFD# setup to STROBE#
active
PD7-PD0, AUTOFD# hold from BUSY
active
STROBE# inactive to BUSY inactive
BUSY inactive to #STROBE active
#STROBE active to BUSY active
BUSY active to #STROBE inactive
PD7-PD0, BUSY setup to ACK# active
PD7-PD0 data hold from AUTOFD#
active
ACK# inactive to AUTOFD# active
AUTOFD# active to ACK# active
ACK# active to AUTOFD# inactive
AUTOFD# inactive to ACK# inactive
Host address setup to IOW# active
Host address hold from IOW# active
Host data setup to IOW# active
Host data hold from IOW# active
IOW# active to IOCHRDY low
IOCHRDY high to Host terminate
(IOW# inactive)
Parameter
DISCONTINUED
48
Min
Limits
3.3
Max
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Min
600
600
450
680
60
80
80
80
80
80
80
40
10
10
0
0
0
0
0
0
0
0
0
0
0
Limits
5.0
Max
100
100
100
500
180
200
180
200
200
60
10
60
20
20
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
ns
ns
ns
ns
ns
ns
ns
Conditions