LTC1344A

Features:

Software-Selectable Cable Termination for:
RS232 (V.28)
RS423 (V.10)
RS422 (V.11)
RS485
RS449
EIA530
EIA530-A
V.35
V.36
X.21
Outputs Won't Load the Line with Power Off


Application

Data Networking
CSU and DSU
Data Routers


Pinout




Specifications

Positive Supply Voltage (VCC)...................................  7V
Negative Supply Voltage (VEE)........................... 13.2V
Input Voltage
(Logic Inputs)................... (V_EE 0.3V) to (V_CC  + 0.3V) 
Input Voltage (Load Inputs)................................ 18V
Power Dissipation..............................................600mW
Operating Temperature Range
LTC1344AC.................................................. 0 C to 70 C
LTC1344AI.............................................. 40 C to 85 C
Storage Temperature Range................  65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C


Description

The LTC^(R) 1344A features six software-selectable multiprotocol cable terminators. Each terminator can be configured as an RS422 (V.11) 100W  minimum differen- tial load, V.35 T-network load or an open circuit for use with RS232 (V.28) or RS423 (V.10) transceivers that provide their own termination. When combined with the LTC1543 and LTC1544, the LTC1344A forms a complete software-selectable multiprotocol serial port. A data bus latch feature allows sharing of the select lines between multiple interface ports.

The LTC1344A is similar to the LTC1344 except for a difference in the Mode Selection table.

The LTC1344A is available in a 24-lead SSOP.