The SAA3049A from Philips Semiconductor has been discontinued. Therefor arises the need for a equivalent replacement. This page describes a solution using a 8051 MCU.
Table of contents:
|Vcc||2.5V - 5.5V||2.7V - 6.0V|
|Icc max. @ 3V||0.7mA||2mA|
|Iol sink pin||-12mA||-20mA|
|Iol sink chip||-100mA||-80mA|
|pullup resistor||external||weak internal, except P1.0 & P1.1|
some application may require an additional stronger external pullup
|reset circuit||resistor, cap, diode||cap|
|mode selection||via ack pin circuit||dedicated mode pin|
|address input||non inverted||inverted (closed switch to GND = 1)|
|IR-code||REC80 or RC5||RC5 only, no code selection pin|
|RC5 decoder and transmitter with AT89C2051, including source code, I have received a report, claiming that it has problems with certain signals||Wagner Lipnharski|
|Universal Infrared Remote Control with AT89C2051, including source code||Lawrence Mazza|
|RC5 decoder, PIC, in Dutch||Tom Michiels|
The part description in schematics is read as follows:
part type + value in exponential form + package description + subpart number in package
for example: C1040805,1 means Capacitor, 100nF, package SMD 0805, first subpart in package
Disclaimer: No warranty at all!
Copyright by Martin Clausen, Germany.
Contact the author: mc AT rotgradpsi DOT de