LM567 National Semiconductor, LM567 Datasheet
LM567
Manufacturer Part Number
LM567
Description
Tone Decoder
Manufacturer
National Semiconductor
Datasheet
1.LM567.pdf
(8 pages)
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© 1999 National Semiconductor Corporation
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 cir-
cuit consists of an I and Q detector driven by a voltage con-
trolled 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
n Bandwidth adjustable from 0 to 14%
Connection Diagrams
capability
Order Number LM567H or LM567CH
See NS Package Number H08C
Metal Can Package
Top View
DS006975
DS006975-1
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
See NS Package Number M08A
See NS Package Number N08E
Order Number LM567CM
Order Number LM567CN
Top View
DS006975-2
www.national.com
May 1999
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