SI52142-A01AGM datasheet, PDF - EEWORLD Datasheet

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SI52142-A01AGM: DescriptionPCI Express（PCIe）时钟/频率发生器，扇出缓冲器（分配），多路复用器 IC 200MHz 1 输出 24-QFN（4x4）; Categorysemiconductor clock and timing; File Size2MB，23 Pages; ManufacturerSkyworks; Websitehttp://www.skyworksinc.com

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SI52142-A01AGM Overview

PCI Express（PCIe）时钟/频率发生器，扇出缓冲器（分配），多路复用器 IC 200MHz 1 输出 24-QFN（4x4）

SI52142-A01AGM Parametric

Parameter Name	Attribute value
category
Maker	Skyworks
series	-
Package	tray
PLL	yes
The main purpose	PCI Express（PCIe）
enter	clock, crystal
output	HCSL
Number of circuits	1
Ratio - Input:Output	1：3
Differential - Input:Output	No/Yes
Frequency - maximum	200MHz
Voltage - Power supply	3.135V ~ 3.465V
Operating temperature	-40°C ~ 85°C
Installation type	surface mount type
Package/casing	24-WFQFN Exposed Pad
Supplier device packaging	24-QFN（4x4）
Basic product number	SI52142

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Si 52142xx

PC I- E

XPRESS

1 , G

2 , & G

E N

3 T

-O

UTP UT

L OCK

ENERATOR WITH

2 5 MH

E F E R E N C E

LOCK

Features



PCI-Express Gen 1, Gen 2, Gen 3,



and Gen 4 common clock compliant



Gen 3 SRNS Compliant



Two 100 MHz, 125 MHz, or 200 MHz



differential clock outputs



Supports Serial ATA (SATA) at

100 MHz



Low power, push-pull HCSL

compatible differential outputs

No termination resistors required



Dedicated output enable hardware

pins for each clock output



Dedicated hardware pins for spread



spectrum and frequency control on

differential outputs

Up to two PCI-Express clocks

25 MHz reference clock output

25 MHz crystal input or clock input

Signal integrity tuning

C support with readback

capabilities

Triangular spread spectrum profile

for maximum electromagnetic

interference (EMI) reduction

Industrial temperature

–40 to 85 °C

3.3 V power supply

24-pin QFN package

Ordering Information:

See page 18.

Pin Assignments

Applications



Network attached storage

Multi-function printer



Wireless access point

Routers

VDD_REF

REF

VDD_CORE

VSS_CORE

XIN/CLKIN

SDATA

XOUT

Description

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

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

output enable pins for enabling the respective outputs, and two hardware pins to

control spread spectrum and frequency on PCIe clock outputs. In addition to the

hardware control pins, I

C programmability is also available to dynamically control

skew, edge rate, and amplitude on the true, compliment, or both differential

signals on the PCIe clock outputs. This control feature enables optimal signal

integrity as well as optimal EMI signature on the PCIe clock outputs.

Refer to AN636 for signal integrity and configurability. Measuring PCIe clock jitter

is quick and easy with the Skyworks Solutions PCIe Clock Jitter Tool. Download it

for free at

https://www.skyworksinc.com/en/application-pages/pci-express-learn-

ing-center.

SCLK

18 OE_DIFF1

17 VDD_DIFF

16 DIFF1

15 DIFF1

14 DIFF0

13 DIFF0

OE_REF

VSS_REF

OE_DIFF0

VDD_DIFF

GND

Notes:

1. Internal 100 kohm pull-up.

2. Internal 100 kohm pull-down.

Patents pending

Functional Block Diagram

XIN/CLKIN

XOUT

REF

DIFF0

PLL1

(SSC)

Divider

DIFF1

SCLK

SDATA

OE_REF

OE [1:0]

SS [1:0]

Control & Memory

Control

RAM

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

Rev. 1.4 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 23, 2021

VDD_DIFF

SS0

SS1

Si52142xx

ABLE

Section

ONTENTS

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.1. Crystal Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2. OE Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2.3. OE Assertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4. OE Deassertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5. SS[1:0] Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3. Test and Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4. Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1. I2C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2. Data Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5. Pin Descriptions: 24-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

8. Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

Rev. 1.4 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 23, 2021

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