Lm567

LM567,LM567C

LM567/LM567C Tone Decoder

Literature Number: SNOSBQ4B

LM567/LM567C

October 13, 2011

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
controlledoscillator which determines the center frequency of
the decoder. External components are used to independently
set center frequency, bandwidth and output delay.

Features
■ 20 to 1 frequency range with an external resistor
■ Logic compatible output with 100 mA current sinking
capability

■ Bandwidth adjustable from 0 to 14%

■
■
■
■

High rejection of out of band signals and noiseImmunity to false signals
Highly stable center frequency
Center frequency adjustable from 0.01 Hz to 500 kHz

Applications
■
■
■
■
■
■
■

Touch tone decoding
Precision oscillator
Frequency monitoring and control
Wide band FSK demodulation
Ultrasonic controls
Carrier current remote controls
Communications paging decoders

Connection Diagrams
Metal Can Package

Dual-In-Line andSmall Outline Packages

697501

Top View
Order Number LM567H or LM567CH
See NS Package Number H08C

© 2011 National Semiconductor Corporation

697502

Top View
Order Number LM567CM
See NS Package Number M08A
Order Number LM567CN
See NS Package Number N08E

6975

6975 Version 4 Revision 4

www.national.com
Print Date/Time: 2011/10/13 13:08:05

LM567/LM567C Tone DecoderOBSOLETE

LM567/LM567C

LM567H
LM567CH, LM567CM, LM567CN
Soldering Information
Dual-In-Line Package

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
Power Dissipation (Note 2)
V8
V3
V3
Storage Temperature RangeOperating Temperature Range

−55°C to +125°C
0°C to +70°C

  Soldering (10 sec.)
Small Outline Package

260°C

  Vapor Phase (60 sec.)

9V
1100 mW
15V
−10V
V4 + 0.5V
−65°C to +150°C

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 CharacteristicsAC Test Circuit, TA = 25°C, V+ = 5V
Parameters

LM567

Conditions

LM567C/LM567CM

Units

Min

Max

Min

Typ

Max

4.75

Power Supply Voltage Range

Typ
5.0

9.0

4.75

5.0

9.0

V

Power Supply Current Quiescent

RL = 20k

6

8

7

10

mA

Power Supply Current Activated

RL = 20k

11

13

12

15

mA

25

mVrms

Input Resistance18

Smallest Detectable Input Voltage

IL = 100 mA, fi = fo

Largest No Output Input Voltage

IC = 100 mA, fi = fo

20
20

10

15
25

20

Largest Detection Bandwidth

12

mVrms

6

dB

−6

Minimum Input Signal to Wideband Noise Bn = 140 kHz
Ratio

15

6

Largest Simultaneous Outband Signal to
Inband Signal Ratio

15

10

−6

dB

LargestDetection Bandwidth Variation
with Temperature

14

16

1

Largest Detection Bandwidth Skew

10

4.75–6.75V

±1

Highest Center Frequency

100

Center Frequency Stability (4.75–5.75V)

0 < TA < 70
−55 < TA < +125

Center Frequency Shift with Supply
Voltage

4.75V–6.75V
4.75V–9V

Fastest ON-OFF Cycling Rate

18

% of fo

3

% of fo

±0.1
±2

500

±1
100%/°C
±5

%V

1.0
2.0

fo/20

500

kHz

35 ± 60
35 ± 140

35 ± 60
35 ± 140
0.5

14
2

2

±0.1

Largest Detection Bandwidth Variation
with Supply Voltage

kΩ

20

ppm/°C
ppm/°C

0.4

2.0
2.0

%/V
%/V

fo/20

Output Leakage Current

V8 = 15V

0.01

25

0.01

25

µA

Output Saturation Voltage

ei = 25 mV, I8 = 30 mA
ei = 25 mV, I8 = 100...