SI52144-A01AGM Silicon_Laboratories, SI52144-A01AGM Datasheet

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SI52144-A01AGM

Manufacturer Part Number
SI52144-A01AGM
Description
Specifications: Type: Clock/Frequency Generator, Fanout Buffer (Distribution), Multiplexer ; PLL: Yes ; Main Purpose: PCI Express (PCIe) ; Input: Clock, Crystal ; Output: Clock ; Number of Circuits: 1 ; Ratio - Input Output: 1 4 ; Differential - Inpu
Manufacturer
Silicon_Laboratories
Datasheet

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PCI-E
O
Features
Applications
Description
The Si52144 is a spread-controlled PCIe clock generator that can source
four PCIe clocks simultaneously. The device has four hardware output
enable control inputs for enabling the respective differential outputs on the
fly while powered on along with the spread control hardware pin to enable
spread for EMI reduction. In addition to the hardware control pins, I
programmability is also available to promptly achieve 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 Rev. 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
Four PCI-Express Clocks
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 [3:0]
SDATA
SSON
XOUT
SCLK
XPRESS
Control & Memory
G
Control
E N E R A T O R
RAM
G
(SSC)
PLL
EN
Copyright © 2011 by Silicon Laboratories
1, G
25 MHz crystal input or clock
input
I
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
2
Divider
C support with readback
EN
o
C
2 , & G
DIFF1
DIFF3
DIFF0
DIFF2
EN
2
C
3 C
Patents pending
Notes:
1. Internal 100 kohm pull-up.
2. Internal 100 kohm pull-down.
SSON
OE1
VDD
VSS
OE2
VDD
Ordering Information:
LOCK
1
2
1
1
2
3
4
5
6
Pin Assignments
S i 5 2 1 4 4
24
7
See page 18
23
8
22
9
GND
25
Q
21
10
20
11
UAD
12
19
18
17
16
15
14
13
OE3
VDD
DIFF3
DIFF3
DIFF2
DIFF2
Si52144
1

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