ZHX2022

FIR Transceiver

PS021802-1005

1

Description

Whether you need to mount the IrDA transceiver so that its communication is par-

allel or perpendicular to the plane of the PCB, the ZiLOG ZHX2022 is the solution

for applications in portable products, such as USB Adapters, notebook PCs, print-

ers, mobile phones, digital cameras, handheld devices, or personal data assis-

tants (PDAs). Designed to support all IrDA data rates up to 4 Mbits/second as well

as LocalTalk™ and Sharp ASK™ modes, the transceiver combines an infrared

emitting diode (IRED) emitter, a PIN photodiode detector, an IRED driver, and an

integrated AGC (Automatic Gain Control) and amplification receive circuit in a sin-

gle, miniature package.

The ZiLOG ZHX2022 provides an efficient implementation of the IrDA-Data 1.4

standard in a small footprint format. Application circuit space is also minimized, as

only three external components (current-limiting resistor, terminating resistor, and

a decoupling capacitor) are required to implement a complete IrDA transceiver

solution.

The ZHX2022 is capable of both mode select and legacy-mode bandwidth

switching.

Features

shutdown current < 5 µA over full temperature range

Control

is controlled, no single fault to be considered