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PDF LM567 Data sheet ( Hoja de datos )
| Número de pieza | LM567 | |
| Descripción | Tone Decoder | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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May 1999
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
capability
n Bandwidth adjustable from 0 to 14%
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
Connection Diagrams
Metal Can Package
Dual-In-Line and Small Outline Packages
DS006975-1
Top View
Order Number LM567H or LM567CH
See NS Package Number H08C
DS006975-2
Top View
Order Number LM567CM
See NS Package Number M08A
Order Number LM567CN
See NS Package Number N08E
© 1999 National Semiconductor Corporation DS006975
www.national.com
1 page  
Typical Applications
Touch-Tone Decoder
Component values (typ)
R1 6.8 to 15k
R2 4.7k
R3 20k
C1 0.10 mfd
C2 1.0 mfd 6V
C3 2.2 mfd 6V
C4 250 mfd 6V
DS006975-5
5 www.national.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LM567.PDF ] | |
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