UCC5342 Datasheet, PDF (1/5 Pages) Texas Instruments – IrDA 115.2kbps Transceiver

UCC5342
IrDA 115.2kbps Transceiver
PRELIMINARY
FEATURES
• Supports IrDA Standard to 115kbps
Data Rates
• 3V to 5V Operation
• Wide Dynamic Receiver Range from
200nA to 50mA Typical
• IrDA Compliant I/O
• 500mA LED Driver
• Very Low Quiescent Current in Active
Mode (250µA Typical)
• Ultra Low Quiescent Current in Sleep
Mode (0.5µA Typical)
• Compatible with IrDA Detector Diodes
DESCRIPTION
The UCC5342 IrDA (Infrared Data Association) Transceiver supports
the analog section of the IrDA standard. The receiver has a limiting
transresistance amplifier to detect a current signal from a PIN diode
and drives RXX pulses to a UART. The amplifier is capable of input cur-
rents ranging from 200nA to 50mA. The amplifier is bandpass limited to
reduce interference from other IR sources.
The output of the receiver is designed to drive CMOS and TTL levels,
for direct interfacing to IrDA compliant UARTs and Super I/O devices.
Internal resistors are provided for decoupling the detector diode supply,
thus minimizing the number of external components required.
The transmitter portion of the chip has a low impedance open drain
MOSFET output. It is capable of sinking 300mA from an output LED at
3V, and 500mA at 5V.
BLOCK DIAGRAM
14 pin version
1/98
µ
UDG-97164