NEC Barracuda Service Manual page 25

Barracuda PDA Maintenance
1.2.2.5 Infrared Component: CHX 1200
The CHX1200 is an Low Power SIR (IrMC) Transceiver. The CALIBRE CHX1200 is an ideal transceiver
for mobile communication applications in today's ultra-compact power conscious portable products, such as
mobile phones, pagers or PDA's. Specifically designed to support IrDA-IrMC Low power SIR mode, the
transceiver combines an IRED emitter, a PIN photodiode detector, a digital AC coupled LED driver and a fully
differential receiver/decoder in a single, miniature package. The CALIBRE CHX1200 provides an efficient
implementation of the low power SIR standard in a small footprint format. Application circuit space is also
minimized, as only one capacitor is required to complete the solution.
Features
Compliant to IrDA SIR Specification 1.2 Low Power SIR (Minimum Link Distance 20cm)
Low supply voltage range, 2.7 to 3.6V
0.2mA (max) Shutdown
Low Power ,95uA (typ.) @ 3.3V
Ultra small form factor (6.8mm L x 2.8mm W x 2.2mm H)
External components : one capacitor
Extended Operating Temp. Range (-30 to + 85 oC)
Pin Compaitble with HP HSDL-3201 and Sharp GP2W0104YP
I LED =35mA @ 3.6 mW/sr
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