LMC568CM National Semiconductor, LMC568CM Datasheet

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LMC568CM

Manufacturer Part Number
LMC568CM
Description
Low Power Phase-Locked Loop
Manufacturer
National Semiconductor
Datasheet

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© 2004 National Semiconductor Corporation
LMC568
Low Power Phase-Locked Loop
General Description
The LMC568 is an amplitude-linear phase-locked loop con-
sisting of a linear VCO, fully balanced phase detectors, and
a carrier detect output. LMCMOS
for high performance with low power consumption.
The VCO has a linearized control range of
demodulation of FM and FSK signals. Carrier detect is indi-
cated when the PLL is locked to an input signal greater than
26 mVrms. LMC568 applications include FM SCA and TV
second audio program decoders, FSK data demodulators,
and voice pagers.
Typical Application
LMCMOS
is a trademark of National Semiconductor Corporation.
(100 kHz input frequency, refer to notes pg. 3)
technology is employed
Order Number LMC568CM or LMC568CN
DS009135
See NS Package Number M08A or N08E
±
30% to allow
Features
n Demodulates
n Carrier Detect Output with hysteresis
n Operation to 500 kHz input frequency
n Low THD — 0.5% typ. for
n 2V to 9V supply voltage range
n Low supply current drain
±
15% deviation FM/FSK signals
±
10% deviation
00913501
www.national.com
May 1999

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LMC568CM Summary of contents

Page 1

... Carrier Detect Output with hysteresis n Operation to 500 kHz input frequency n Low THD — 0.5% typ. for ± 30% to allow supply voltage range n Low supply current drain Order Number LMC568CM or LMC568CN See NS Package Number M08A or N08E DS009135 May 1999 ± 15% deviation FM/FSK signals ± ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage, Pin 3 Supply Voltage, Pin 4 Output Voltage, Pin 8 Voltage at All Other Pins Output Current, Pin 8 Package Dissipation Operating Temperature Range (T ...

Page 3

Electrical Characteristics Test Circuit 25˚ 5V, RtCt #2, Sw. 1 Pos. 0; and no input unless otherwise noted Symbol Parameter Signal to Noise Ratio Typical Application Circuit Remove Modulation, Measure N)/N ...

Page 4

Notes to Typical Application SUPPLY DECOUPLING The decoupling of supply pin 4 becomes more critical at high supply voltages with high operating frequencies, requiring placed as close to possible to pin 4. Also, due to pin voltages ...

Page 5

LMC568 Typical Performance Characteristics Pull-In Range as a Function of C2 (Continued) 00913509 5 www.national.com ...

Page 6

... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted SO Package (M) Order Number LMC568CM NS Package Number M08A Molded Dual-In-Line Package (N) Order Number LMC568CN NS Package Number N08E 6 ...

Page 7

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’ ...

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