— 30 —
DATA
10k
STB
ACK, BUSY, PE, FAULT
RESET
10k
330
102 102
5k
104
10k
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 TTL Level
“HIGH” level: 4.0 V MIN “HIGH” level: 2.4 V MIN
“LOW” level: 1.0 V MAX “LOW” level: 0.4 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 > < PRINTER SIDE >
(HC573 or equivalent)
(HC04 or equivalent)
(7406 or equivalent)
(HC05 or equivalent)
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