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LM1872 Datasheet

  • LM1872

  • Radio Control Receiver/Decoder

  • 20頁

  • NSC

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LM1872 Radio Control Receiver Decoder
February 1989
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
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
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
Applications
Y
Y
Y
Y
Y
Y
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
Circuit Block and Connection Diagram
Dual-In-Line Package
TL H 7912 鈥?
Bottom View
Order Number LM1872N
See NS Package Number N18A
C
1995 National Semiconductor Corporation
TL H 7912
RRD-B30M115 Printed in U S A

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