LM1872 National Semiconductor, LM1872 Datasheet

LM1872

Manufacturer Part Number

LM1872

Description

Radio Control Receiver/Decoder

Manufacturer

National Semiconductor

Datasheet

1.LM1872.pdf (20 pages)

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1872N

Manufacturer:

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM1872N

Manufacturer:

MIT

Quantity:

5 510

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C 1995 National Semiconductor Corporation

LM1872 Radio Control Receiver Decoder

General Description

The LM1872 is a complete RF receiver decoder for radio

control applications The device is well suited for use at ei-

ther 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 chan-

nels with 100 mA drive capability Either channel type can

be converted to the other form through simple external cir-

cuitry such that up to 4 analog or up to 4 digital channels

could be created Few external parts are required to com-

plement the self-contained device which includes local os-

cillator mixer IF detector AGC sync output drivers and all

decoder logic on-chip

Circuit Block and Connection Diagram

TL H 7912

See NS Package Number N18A

Order Number LM1872N

Dual-In-Line Package

Bottom View

Features

Applications

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

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

TL H 7912 – 1

RRD-B30M115 Printed in U S A

February 1989

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