LM567C

Manufacturer Part NumberLM567C
DescriptionTone Decoder
ManufacturerNational Semiconductor
LM567C datasheet
 


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LM567/LM567C
Tone Decoder
General Description
The LM567 and LM567C are general purpose tone decoders
designed to provide a saturated transistor switch to ground
when an input signal is present within the passband. The
circuit consists of an I and Q detector driven by a voltage
controlled oscillator which determines the center frequency
of the decoder. External components are used to indepen-
dently set center frequency, bandwidth and output delay.
Features
n 20 to 1 frequency range with an external resistor
n Logic compatible output with 100 mA current sinking
capability
n Bandwidth adjustable from 0 to 14%
Connection Diagrams
Metal Can Package
Top View
Order Number LM567H or LM567CH
See NS Package Number H08C
© 2004 National Semiconductor Corporation
n High rejection of out of band signals and noise
n Immunity to false signals
n Highly stable center frequency
n Center frequency adjustable from 0.01 Hz to 500 kHz
Applications
n Touch tone decoding
n Precision oscillator
n Frequency monitoring and control
n Wide band FSK demodulation
n Ultrasonic controls
n Carrier current remote controls
n Communications paging decoders
Dual-In-Line and Small Outline Packages
00697501
See NS Package Number M08A
See NS Package Number N08E
DS006975
February 2003
00697502
Top View
Order Number LM567CM
Order Number LM567CN
www.national.com

LM567C Summary of contents