SI52142-A01AGM Silicon_Laboratories, SI52142-A01AGM Datasheet

SI52142-A01AGM

Manufacturer Part Number

SI52142-A01AGM

Description

Specifications: Type: Clock/Frequency Generator, Fanout Buffer (Distribution), Multiplexer ; PLL: Yes with Bypass ; Main Purpose: PCI Express (PCIe) ; Input: Clock, Crystal ; Output: Clock ; Number of Circuits: 1 ; Ratio - Input Output: 1 3 ; Differe

Manufacturer

Silicon_Laboratories

Datasheet

1.SI52142-A01AGM.pdf (20 pages)

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PCI-E

Features



Applications



Description

The Si52142 is a spread-controlled PCIe clock generator that can source

two PCIe clocks and a 25 MHz reference clock. The device has three

hardware output enable control inputs for enabling the respective outputs

on the fly while powered on along with the hardware input for spread

spectrum and frequency control on outputs. In addition to the hardware

control pins, I

optimum clock signal integrity through skew and edge rate control on true,

compliment, or both differential outputs as well as amplitude control.

Functional Block Diagram

Preliminary 0.1 12/11

PCI-Express Gen 1, Gen 2 &

Gen 3 compliant

Low power push-pull type

differential output buffers

Integrated resistors on differential

clocks

Dedicated output enable

hardware pin for each clock

Hardware selectable spread

control

Two PCI-Express clocks

25 MHz reference clock

Network attached storage

Multi-function printer

UTPUT

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

XIN/CLKIN

OE_REF

SS [1:0]

OE [1:0]

SDATA

XOUT

SCLK

XPRESS

C programmability is also available to promptly achieve

Control & Memory

Control

E N E R A T O R WITH

RAM

(SSC)

PLL1



1, G

25 MHz crystal input or clock

input

capabilities

Triangular spread spectrum

profile for maximum

electromagnetic interference

(EMI) reduction

Industrial temperature

–40 to 85

3.3 V power supply

24-pin QFN package

Wireless access point

Routers

Divider

C support with readback

25 MH

2 & G

DIFF0

DIFF1

REF

3 C

EFERENCE

Patents pending

Notes:

1. Internal 100 kohm pull-up.

2. Internal 100 kohm pull-down.

OE_DIFF0

VDD_REF

VDD_DIFF

VSS_REF

OE_REF

L O C K

REF

Ordering Information:

Pin Assignments

S i 5 2 1 4 2

See page 18

GND

W O

L O C K

OE_DIFF1

VDD_DIFF

DIFF1

DIFF0

Si52142

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