Electrical Characteristics - Citizen CBM-920II User Manual

5.4 Electrical Characteristics

(1) Input signal level
The input except RESET are CMOS signal levels. As the input side is pulled up
with a resistance of 10 kΩ, it can be used at TTL level.
CMOS Level
"HIGH" level: 4.0 V MIN
"LOW" level: 1.0 V MAX
(2) Output signal level
All inputs are TTL level. As the input side is pulled up with a resistance of 10 kΩ,
it can be used at TTL level.
"HIGH" level: 2.4 V MIN
"LOW" level: 0.4 V MAX
(3) I/O conditions
< HOST SIDE >
ACK, BUSY, PE, FAULT
TTL Level
"HIGH" level: 2.4 V MIN
"LOW" level: 0.4 V MAX
DATA
STB
RESET
< PRINTER SIDE >
10k
10k
330
102
5k
104
10k
— 30 —
(HC573 or equivalent)
(HC04 or equivalent)
102
(7406 or equivalent)
(HC05 or equivalent)