Electronic Design

IrDA-Compatible Transceiver Cuts Component Count

Compliant with version 1.3 of the IrDA standard for data transmission up to 4 Mbits/s, ZiLog's ZHX2010 fast infrared (FIR) transceiver requires half as many external components as comparable devices. This transceiver comes with a built-in current source, eliminating the need for an external resistor, and a differential front end. By improving the device's noise rejection, the differential front end gets rid of up to three external filter components, including a hard-to-obtain tantalum capacitor.

According to ZiLog, the ZHX2010 is the first FIR transceiver with the same footprint as Infineon's IRMS6400. The companies have agreed to dual-source selected devices in their IrDA-compatible data-transceiver product families, yielding this compatibility. Additionally, the transceiver can operate at data rates as low as 2.4 kbits/s for backward compatibility with legacy devices.

The ZHX2010 is offered in a 9.8- by 4.8- by 4.0-mm surface-mount package. It operates from a supply voltage of 2.7 to 5.25 V while consuming just 2 mA at 2.7 V. Current consumption typically drops to about 50 nA in the shutdown mode. Also, the device incorporates on-chip LED protection to prevent accidental emitter burnout.

Sample and production quantities are available now, with lead times of eight to 10 weeks for larger orders. Unit pricing in 50,000-piece quantities for U.S. delivery is $2.35.

ZiLog Inc., 910 E. Hamilton Ave., Suite 110, Campbell, CA 95008; Kate Moore, (408) 558-8473; www.zilog.com.

TAGS: Components
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