843201-375 datasheet(1/19 Pages) IDT

Part #	843201-375

Description	FemtoClock짰 Crystal-to-LVPECL 375MHz Frequency Margining Synthesizer

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Manufacturer	IDT [Integrated Device Technology]

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FemtoClock

® Crystal-to-LVPECL 375MHz

Frequency Margining Synthesizer

843201-375

DATASHEET

843201-375 REVISION A 8/21/15

1

2

3

4

5

6

7

8

Q

nQ

VCCO

VCC

VEE

MR

nPLL_SEL

nc

16

15

14

13

12

11

10

9

VCC

MODE

nc

XTAL_IN

XTAL_OUT

MARGIN

VEE

nc

GENERAL DESCRIPTION

The 843201-375 is a low phase-noise frequency margining

synthesizer. In the default mode, the device nominally generates a

375MHz LVPECL output clock signal from a 25MHz crystal input.

There is also a frequency margining mode available where the

device can be conﬁgured, using control pins, to vary the output

frequency up or down from nominal by 5%. The 843201-375 is

provided in a 16-pin TSSOP package.

FEATURES

• One 375MHz nominal LVPECL output

• Crystal oscillator interface designed for 25MHz, 18pF parallel

resonant crystal

• Output frequency can be varied ± 5% from nominal

• VCO range: 700MHz - 800MHz

• RMS phase jitter @ 375MHz, using a 25MHz crystal

(12kHz - 20MHz): 0.72ps (typical) @ 3.3V

• Output supply modes

Core/Output

3.3V/3.3V

3.3V/2.5V

2.5V/2.5V

• 0°C to 70°C ambient operating temperature

• Available in lead-free (RoHS 6) package

• Functional replacement part 8T49N241-dddNLGI

BLOCK DIAGRAM

PIN ASSIGNMENT

843201-375

16-Lead TSSOP

4.4mm x 5.0mm x 0.92mm

package body

G Package

Top View

1

0

1

Phase

Detector

VCO

700 - 800MHz

÷30

(÷57, ÷63)

OSC

Predivider

÷2

Q

nQ

Pulldown

25MHz

Pulldown

nPLL_SEL

XTAL_IN

XTAL_OUT

MODE

MARGIN

MR

Similar Part No. - 843201-375

Manufacturer	Part #	Datasheet	Description
Renesas Technology Corp	843201-375	470Kb / 20P	FemtoClock® Crystal-to-LVPECL 375MHz Frequency Margining Synthesizer 8/21/15

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843201-375 Datasheet(PDF) 1 Page - Integrated Device Technology

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