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Part Number 74C922-SO

Copyright © 2014 ABCircuits. Revised September 2014 Page 1 of 6

SI14 IC

Serial Input IC For 14 Bits of Input

General Description

The SI14 IC is designed to provide 14 bits of input data to connect to RS-232, RS-485, USB,

Ethernet or directly to your UART. Inputs can be from switches, relay contacts, logic,

optocouplers or a transistor switched to ground. The SI14 has internal pull resistors on the inputs

to minimize additional parts. The SI14 IC transmits data anytime the inputs change or after a

delay of 100 or 1000 mS. The output of the SI14 is standard asynchronous format, using 8 bits, 1

stop and no parity at 9600 BPS. Other formats and encoding are available, contact the factory.

A .1 uF bypass capacitor is suggested across the VDD and VSS pins. The part uses the standard

20 pin .3 inch width SOIC package. This part may be paired with the SO14 chip to achieve 14

bits of input and output, except on RS-485 interfaces.

Features

14 bits of data.

RS-485, USB or Ethernet or UART.

contacts, optocouplers, and logic.

typical.

inputs.

Applications