NSC LM567CN, LM567CMX Datasheet

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 indepen­dently 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

DS006975-1

Top View

Order Number LM567H or LM567CH

See NS Package Number H08C

Dual-In-Line and Small Outline Packages

DS006975-2

Top View

Order Number LM567CM

See NS Package Number M08A

Order Number LM567CN

See NS Package Number N08E

May 1999

LM567/LM567C Tone Decoder

© 1999 National Semiconductor Corporation DS006975 www.national.com

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage Pin 9V
Power Dissipation (Note 2) 1100 mW
V

8

15V

V

3

−10V

V

3

V4+ 0.5V

Storage Temperature Range −65˚C to +150˚C

Operating Temperature Range

LM567H −55˚C to +125˚C
LM567CH, LM567CM, LM567CN 0˚C to +70˚C

Soldering Information

Dual-In-Line Package

Soldering (10 sec.) 260˚C

Small Outline Package

Vapor Phase (60 sec.) 215˚C
Infrared (15 sec.) 220˚C

See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.

Electrical Characteristics

AC Test Circuit, T

A

=

25˚C, V

+

=

5V

Parameters Conditions

LM567 LM567C/LM567CM

Units

Min Typ Max Min Typ Max

Power Supply Voltage Range 4.75 5.0 9.0 4.75 5.0 9.0 V
Power Supply Current Quiescent R

L

= 20k 6 8 7 10 mA

Power Supply Current Activated R

L

= 20k 11 13 12 15 mA
Input Resistance 18 20 15 20 kΩ
Smallest Detectable Input Voltage I

L

= 100 mA, fi=f

o

20 25 20 25 mVrms

Largest No Output Input Voltage I

C

= 100 mA, fi=f

o

10 15 10 15 mVrms

Largest Simultaneous Outband Signal to
Inband Signal Ratio

66dB

Minimum Input Signal to Wideband Noise
Ratio

B

n

= 140 kHz

−6 −6 dB

Largest Detection Bandwidth 12 14 16 10 14 18

%

of f

o

Largest Detection Bandwidth Skew 1 2 2 3

%

of f

o

Largest Detection Bandwidth Variation
with Temperature

±

0.1

±

0.1

%

/˚C

Largest Detection Bandwidth Variation
with Supply Voltage

4.75–6.75V

±

1

±

2

±

1

±

5

%

V

Highest Center Frequency 100 500 100 500 kHz
Center Frequency Stability (4.75–5.75V) 0

<

T

A

<

70

−55

<

T

A

<

+125

35

±

60

35

±

140

35

±

60

35

±

140

ppm/˚C
ppm/˚C

Center Frequency Shift with Supply
Voltage

4.75V–6.75V

4.75V–9V

0.5 1.0

2.0

0.4 2.0

2.0

%

/V

%

/V

Fastest ON-OFF Cycling Rate f

o

/20 fo/20

Output Leakage Current V

8

= 15V 0.01 25 0.01 25 µA
Output Saturation Voltage e

i

= 25 mV, I8=30mA

e

i

= 25 mV, I8= 100 mA

0.2

0.6

0.4

1.0

0.2

0.6

0.4

1.0

V

Output Fall Time 30 30 ns
Output Rise Time 150 150 ns

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func­tional, but do not guarantee specific performance limits. Electrical Characteristics state DC andAC electrical specifications under particular test conditions which guar­antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is
given, however, the typical value is a good indication of device performance.

Note 2: The maximum junction temperature of the LM567 and LM567C is 150˚C. For operating at elevated temperatures, devices in the TO-5 package must be de­rated based on a thermal resistance of 150˚C/W, junction to ambient or 45˚C/W, junction to case. For the DIP the device must be derated based on a thermal resis­tance of 110˚C/W, junction to ambient. For the Small Outline package, the device must be derated based on a thermal resistance of 160˚C/W, junction to ambient.

Note 3: Refer to RETS567X drawing for specifications of military LM567H version.

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Schematic Diagram

Typical Performance Characteristics

DS006975-3

Typical Frequency Drift

DS006975-10

Typical Bandwidth Variation

DS006975-11

Typical Frequency Drift

DS006975-12

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