LC72131KM View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LC72131KM

CMOS IC PLL Frequency Synthesizer

SANYO -> Panasonic 

LC72131K, 72131KM

Continued from preceding page.

Symbol

Pin No.

LC72131K LC72131KM

PD

18

16

Type

Charge pump

output

AIN

19

AOUT

20

17

LPF amplifier

18

transistors

Functions

PLL charge pump output

When the frequency generated by dividing the local oscillator

frequency by N is higher than the reference frequency, a high

level is output from the PD pin.

Similarly, when that frequency is lower, a low level is output.

The PD pin goes to the high impedance state when the

frequencies match.

The n-channel MOS transistor used for the PLL active

low-pass filter.

Circuit configuration

IFIN

12

11

IF counter

Accepts an input in the frequency range 0.4 to 12MHz.

The input signal is directly transmitted to the IF counter.

The result is output starting the MSB of the IF counter using the

DO pin.

Four measurement periods are supported: 4, 8, 32, and 64ms.

DI Control Data (Serial Data Input) Structure

[1] IN1 mode

address

DI

00010100

First Data IN1

[2] IN2 mode

address

DI

10010100

First Data IN2

No.A0788-8/22

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