Description
Features:
Four independent information channels; two analog and two digital
Completely self-contained
Minimum of external parts
Operation from 50 kHz to 72 MHz
Highly selective and sensitive superhet design
Operates from four 1.5V cells
Excellent supply noise rejection
100 mA digital output drivers
Crystal controlled
Interfaces directly with standard hobby servos
Application
Toys and hobby craft
Energy saving, remotely switched lighting systems
Burgler alarms
Industrial and consumer remote data links
IR data links
Remote slide projector control
Specifications
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage 7V
Package Dissipation (Note 2) 1600 mW
Voltage @ Pin 7, 8, 9, 10, 11 or 12 V+
Operating Temperature Range -25 to +85
Storage Temperature Range -65 to +150
Lead Temperature (Soldering, 10 sec.) 260
Description
The LM1872 is a complete RF receiver/decoder for radio control applications. The device is well suited for use at either 27 MHz, 49 MHz or 72 MHz in controlling various toys or hobby craft such as cars, boats, tanks, trucks, robots, planes, and trains. The crystal controlled superhet design offers both good sensitivity and selectivity. When operated in conjunction with the companion transmitter, LM1872, it provides four independent information channels. Two of these channels are analog pulse width modulated (PWM) types, while the other two are simple ON/OFF digital channels with 100 mA drive capability. Either channel type can be converted to the other form through simple external circuitry such that up to 4 analog or up to 4 digital channels could be created. Few external parts are required to complement the self-contained device which includes local oscillator, mixer, IF detector, AGC, sync output drivers, and all decoder logic on-chip.
LM1872 Data Sheet
