Black Box IC470A - IC473 A, IC630 A, and IC631 A Models

37
C.2 IC473A, IC630A, and IC631A Models
TRANSMITTED DATA
CLAMPED TO 1v p–p
OUTPUT
BUFFER
SURGE
PROTECTION
SURGE
PROTECTION
SURGE
PROTECTION
SURGE
PROTECTION
OUTPUT
BUFFER
ACTIVE
FILTER
SCHMITT
TRIGGER
RCV+
RCV–
GND
XMT–
XMT+
5
3 2 1 4
>>
>
> >
>
> >
>>
>>
SG
DSR
TD
DTR
CD
CTS
RTS
TD
RD
3 DATA
2 7 1 4
3
6 5
8
–V
+V
POWER SUPPLY
+V
APPENDIX C: Block Diagrams
NOTE: The RCV+ line is held negative with respect to RCV– when no data is being received.