User Manual

CONFIDENTIAL

No ASR – NP – 14836 – 01 12/

9.2 Electrical characteristics

1) Output condition (TXD, RTS, DTR)

2) Input condition (RXD, CTS, DSR)

9.3 Voltage level

Notes

1) Input condition is average figure of voltage, to identify a given signal as Mark or Space.

2) Difference between Output & Input condition is due to taking account of signal to noise efficiency during

transmission.

3) Maximum length of cable :It depends on the FCC Part15 examination.

(Therefore, it is still preparing it.)

Name Space Mark Condition

Meaning 0/on 1/off

Output condition +5V ~ +15V (+9.7Vtyp) -15V ~ -5V (-9.7Vtyp) RL=3 K ~ 7 K ohm

Input condition >=+3V <= -3V Rin=3 K ~ 7 K ohm

-12V

+12V

ICL3243E (intersil)

or equivalent

OUT

Vcc (+5V)

ICL3243E (intersil)

or equivalent