TLC2934

3.3 V 130 MHZ VCO, PHASE FREQUENCY DETECTOR

SLAS306 – NOVEMBER 2000

1

POST OFFICE BOX 655303

–

Ring Oscillator Using Only One

– 100 MHz to 130 MHz

Includes a High-Speed Edge-Triggered

Detector With Internal Charge Pump

Mode

Terminal)

TLC2932, TLC2933

description

The TLC2934, a mixed signal IC designed for phase-locked-loop (PLL) systems, is composed of a

voltage-controlled oscillator (VCO) and an edge-triggered-type phase frequency detector (PFD).

The internal VCO is based on the TLC2932 and TLC2933s ring oscillator. It oscillates in wider frequency with

lower supply voltage, and it has stable oscillating performance. The oscillation function, provided by only one

external resistor connection, supplies bias to the VCI internal circuit. Oscillator range is covered from 10 MHz

to 130 MHz with a 3.3-V supply voltage. The VCO has an inhibit function to stop oscillation and for the

power-down mode.

The internal PFD, a high-speed rising edge triggered type, has an internal charge pump with a high-impedance

output buffer. The PFD detects phase difference between the reference frequency input and the signal

frequency input from the VCO output through an external counter device. This functions the same as TLC2932

and TLC2933. The PFD also has the inhibit function for stop phase comparison and for power-down mode.

block diagram

Through

or 1/2

Ring

Oscillator

Bias

Control

VCO

PFD

Ring

Oscillator

TLC29341PW

f(OSC)

PFD OUT

Bias Supply

Control Voltage

VCO INHIBIT

Reference Input

Comparison Input

PFD INHIBIT

Copyright

© 2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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SELECT

VCO OUT

FIN -A

FIN -B

PFD OUT

LOGIC GND

VCO GND

VCO INHIBIT

PFD INHIBIT

TEST

PW PACKAGE

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