MC13173 Datasheet, PDF (1/18 Pages) Motorola, Inc – INFRARED TRANSCEIVER

Order this document by MC13173/D
Infrared Integrated
Transceiver IC
MC13173
The MC13173 is a low power infrared integrated system (IRIS). It is a
unique blend of a split IF wideband FM receiver and a specialized infrared
LED transmitter. This device was designed to provide communications
between portable computers via a half duplex infrared link at data rates up to
200 kbps.
The receiver includes a mixer, IF amplifier and limiter and data slicer. The
IF amplifier is split to accommodate two low cost cascaded filters. The RSSI
output is derived by summing the output of both IF sections.
The transmitter section includes a frequency synthesizer, FSK modulator,
harmonic low pass filter and an IR LED driver.
• Transmitter Operates in Two Modes:
– On/Off Pulsing for Remote Control
– FSK Modulation at 1.4 MHz for Data Communications
• Over 70 dB of RSSI Range
• Split IF for Improved Filtering and Extended RSSI Range
• Digitally controlled Via a Six Line Interface Bus
• Individual Circuit Blocks Can Be Powered Down When Not In Use for
Power Conservation
INFRARED
TRANSCEIVER
SEMICONDUCTOR
TECHNICAL DATA
32
FTB SUFFIX
PLASTIC PACKAGE
1
CASE 873
(Thin QFP)
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC13173FTB TA = – 40° to +85°C TQFP–32
12 M 1
V _EE1 2
Simplified Block Diagram
32 kHz Ma
Ref PLL
32
31
Tx 14 MHz
PLL Ref
T
30
29
28
Data
IR LED
In
E Driver
27 26 25
Master
VCO/PLL
FSK
Modulator
Mode Select
Harmonic
LPF
Driver
24
LED Driver
Feedback
23 VEE3
R3
RF In1 4
RF In2 5
Mixer
Out
6
VCC1 ₇
IF In ⁸
Mixer
Data Slicer
VReg1
IF
Amplifier
Limiter
VReg2
9
10 11 12
13 14 15 16
IF
IF
Dec1 Dec2
IF
Out
VCC2
Lim
In
Lim Lim RSSI
Dec1 Dec2
This device contains 914 active transistors.
22 _{Data Out}
21 ^VEE2
20
Data
Slicer In
19 Demod
18 Quad Coil
17
Carrier
Detect
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 0
1