SIO7 Datasheet, PDF (1/7 Pages) ABCircuits – Serial input/output IC for 7 bits of input and 7 bits of output

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SIO7 IC
Serial input/output IC for 7 bits of input and 7 bits of
output
General Description
The SIO7 IC is designed to provide 7 bits of input and output data to connect to RS-232, USB,
Ethernet or directly to your UART. Outputs can be used to drive relays, logic, optocouplers or a
transistors. Inputs can be from switches, relay contacts, logic, optocouplers or a transistor
switched to ground. The SIO7 has internal pull resistors on the inputs to minimize additional
parts. The SIO7 IC transmits data anytime the inputs change or every of 100 mS. The serial
format to the SIO7 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. A full duplex data channel is required, do not use RS -485 or a half duplex data channel
with this part. The SAIO7 IC may be used if your design requires a half duplex data channel.
Features
• Asynchronous serial control for 7
bits of input and 7 bits of output.
• Can connect with RS-232, USB or
Ethernet or UART.
• Inputs can be switches, relay
contacts, optocouplers, and logic.
• On chip input pull up resistors on
inputs.
• Outputs can be used to drive relays,
transistors, optocouplers, and logic.
• No external parts required.
• Low power consumption 5 mA
typical.
• Supply voltage 2.4 to 5.25 volts.
• All timing internally generated.
• TTL and CMOS compatible outputs.
• Part is in full production.
• SOIC and DIP 20 Pin Package.
• ROHS Compliant
• Low EMI
Applications
• Input Output Expansion
• Remote control
• Process control
• Building Automation
• Off site monitoring
• Security systems
• Internet of things
• Machine control
Part Number 74C922-SO
Copyright © 2014 ABCircuits. Revised September 2014 Page 1 of 7