Last Updated on February 7, 2024 by
General 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, LM1871, 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. A few external parts are required to complement the self-contained device which includes a local oscillator, mixer, IF detector, AGC, sync output drivers, and all decoder logic on-chip.
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
Specifications:
Applications
- Toys and hobby craft
- Energy saving remotely switched lighting systems
- Burglar alarms
- Industrial and consumer remote data links
- IR data links
- Remote slide projector control