HFC-U Cologne Chip AG, HFC-U Datasheet - Page 36

• Manufacturer Part Number: HFC-U
• Description: Isdn HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

I/O Characteristics
March 1997
IOCHRDY
BD0-7
BUSDIR
SRD0-7
SRA0-14
/SRCS
/SRWE
C4IO
F0IO
GCI_IN
GCI_OUT
F1_A-B
IRQA-F
IIOSEL0-3
SA0-9
/AEN
/IOR
/IOW
BD0-7
ALE
SRD0-7
C4IO
F0IO
GCI_IN
GCI_OUT
/IRQ_P
IRQ_P
/WD_RES
WD_RES
RESET
Output
Input
12mA
18mA
12mA
0.4V
4mA
2mA
2mA
4mA
4mA
6mA
6mA
6mA
6mA
6mA
TTL, internal pull-up resistor
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL, internal pull-up resistor
TTL, internal pull-up resistor
TTL, internal pull-up resistor
TTL, internal pull-up resistor
open drain, external pull up resistor required
open source, external pull down resistor
required
open drain, external pull up resistor required
open source, external pull down resistor
required
CMOS Schmitt Trigger
Driver Capability
Low
24mA
0.6V
Interface Level
V
CC
High
8mA
2mA
1mA
1mA
2mA
2mA
3mA
3mA
3mA
3mA
3mA
6mA
- 0.4V
HFC-U
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