Description

The USAR SerialCoderTM UR5HC703 is an extremely low-power, “off-the-shelf” serial keyboard encoder. Robust, tiny and flexible, the IC is a good match for any application where the use of complicated keyboard protocols are not required and where asynchronous serial interface hardware is available.

Features

• 8 x 16 Matrix Encoding

• 9600 Baud 8N1Serial Data Format

• IC is independent of the keyboard layout

• Zero-PowerTM operation, transparent to the Host

• Average current consumption of less than 1µA at room temperature; 10µA at 85°C

• Customized versions available

• TTL/CMOS Output-only Asynchronous Serial Interface to the Host (direct connection to the UART)

• Very simple serial protocol — Two-Byte Identification String on power-up; single-Byte Matrixposition for each key-press or key-release

• Robust algorithm for Ghost-key elimination

Applications

• Built-in keyboards for HH PDAs/Organizers

• Add-on accessory keyboards for Palm and H/PC Devices

• Portable Personal Computers

• Instrumentation

• Remote Control

• Cellular Phones