MAS7838 ETC, MAS7838 Datasheet - Page 7

• Manufacturer Part Number: MAS7838
• Description: SYNCHRONOUS TO ASYNCHRONOUS CONVERTER SAC CMOS
• Manufacturer: ETC

TXD
RXD
RS232C
selection
jumpers
mode
470pF
470pF
4.75k
3 x
TTL/V28
78189A
TTL/V28
75189A
+5v
+5v
+12v
ASY/SYN Select
-12v
Ext. Signal Rate
Char. Length
Char. Length
+5v
RDO
TDI
XHST
TSL
*) Optional timing from the
synchronous modem.
In this case CR 1 can be
eliminated.
MAS7838 simplified application:
V.28 interface for synchronous modem
9
13
1
12
7
5
6
11
MAS7838
+5v
16
8
14
15
10
4
2
3
CR 1
TDO
RXC
TXC
RDI
TTL-Level
TTL-Level
TTL-Level
TTL-Level
22pF
9.8304MHz
22pF
*)
16 x TXC
Modem
Timing
Circuit
Synchronous
20 September, 2000
Modem
RXC
DA7838.002
TXC
7 (9)