SM5158 データシートの表示（PDF） - Nippon Precision Circuits

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SM5158

Serial input PLL frequency synthesizer

Nippon Precision Circuits  

BLOCK DIAGRAM

SM5158AS

XIN

XOUT

DATA

CLK

LE

FIN

16 BIT COUNTER

16 BIT LATCH

17 BIT SHIFT REGISTER

PHASE

DETECTOR

16 BIT LATCH

16 BIT N COUNTER

LOCK

DETECTOR

CHARGE

PUMP

BUFFER

FR

LD

DOA

DOP

OR

OV

FV

PIN DESCRIPTION

Number Name

Description

1

XIN To connect external crystal and capacitor, or external clock input pin.

2

XOUT To connect external crystal and capacitor,or oscilator output signal can be available at this pin.

3

FV Buffered input frequency divider output.phase detector input

4

VDD Positive supply pin. Apply +2.7 to 5.5 Volts.

5

DOP Charge pump output for passive lowpass filter. Single ended tristate output.

6

VSS Ground.

7

LD Lock detector output. Logic Low when PLL is unlocked.

8

FIN Comparison frequency input.Internal feedback resistor for AC coupling.

Input frequency range 20MHz to 200MHz.

9

CLK Shift register clock input.

10 DATA Serial data input.

11

LE Latch enable input.

12

DOA Chrage pump output for active lowpass filter. Single ended tristate output.

13

FR Buffered reference frequency devider output. Phase detector input.

14 TEST Test pin. Left open.

15

OV Buffered phase detector output to a differential lowpass filter.

16

OR Buffered phase detector output to a differential lowpass filter.

NIPPON PRECISION CIRCUITS-2

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