LM3661AM NSC [National Semiconductor], LM3661AM Datasheet

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LM3661AM

Manufacturer Part Number
LM3661AM
Description
LM3361A Low Voltage/Power Narrow Band FM IF System
Manufacturer
NSC [National Semiconductor]
Datasheet
1.LM3661AM.pdf (6 pages)
C 1995 National Semiconductor Corporation
LM3361A Low Voltage Power Narrow Band FM IF System
General Description
The LM3361A contains a complete narrow band FM de-
modulation system operable to less than 2V supply voltage
Blocks within the device include an oscillator mixer FM IF
limiting amplifier FM demodulator op amp scan control
and mute switch The LM3361A is similar to the MC3361
with the following improvements the LM3361A has higher
voltage swing both at the op amp and audio outputs It also
has lower nominal drain current and a squelch circuit that
draws significantly less current than the MC3361 Device
pinout functions are identical with some slightly different op-
erating characteristics
Block Diagram and Test Circuit
Order Number LM3661AM
See NS Package Number
M16A or N16E
or LM3361AN
TL H 5586
T1-TOKO RMC-2A6597HM
CF-MURATA CFU 455E
Features
Y
Y
Y
Y
Y
Y
Functions at low supply voltage (less than 2V)
Highly sensitive (
High audio output (increased 6 dB over MC3361)
Low drain current (2 8 mA typ V
Minimal drain current increase when squelched
Low external parts count
b
3 dB limiting at 2 0 V input typical)
CC
e
RRD-B30M115 Printed in U S A
3 6V)
August 1989
TL H 5586 – 1

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LM3661AM Summary of contents

Page 1

... MC3361 Device pinout functions are identical with some slightly different op- erating characteristics Block Diagram and Test Circuit Order Number LM3661AM or LM3361AN See NS Package Number M16A or N16E C 1995 National Semiconductor Corporation ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Package Dissipation (Note 1) Power Supply Voltage ( Input Voltage ( ...

Page 3

Typical Performance Characteristics (Test Circuits 5586 – 2 ...

Page 4

Internal Schematic 4 ...

Page 5

Applications Information (See Internal Schematic) OSCILLATOR The Colpitts type oscillator is internally biased with a regu- lated current source which assures proper operation over a wide supply range The collector base and emitter termi- nals are at pins 4 1 ...

Page 6

Physical Dimensions inches (millimeters) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life ...

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