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SI52131-A11A 데이터시트(PDF) 1 Page - Silicon Laboratories

부품명 SI52131-A11A
상세설명  No termination resistors required
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제조업체  SILABS [Silicon Laboratories]
홈페이지  http://www.silabs.com
Logo SILABS - Silicon Laboratories

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Rev 1.0 3/13
Copyright © 2013 by Silicon Laboratories
Si52131-A11A
Si52131-A11A
PCI-E XPRESS G EN1, G EN2, & G EN3 TWO O UTPUT C LOCK G ENER-
ATOR WITH
25 MH Z R EFERENCE C LOCK & A CTIVE L OW OE P INS
Features
Applications
Description
Si52131-A11A is a high-performance, PCIe clock generator that can
source two PCIe clocks and a buffered 25 MHz reference clock from a
25 MHz crystal or clock input. The PCIe clock outputs are compliant to
PCIe Gen 1, Gen 2, and Gen 3 specifications. The device has three
active low output enable pins for enabling and disabling each output. The
device features two input select pins for frequency selection and spread
control. The small footprint and low power consumption makes Si52131-
A11A the ideal clock solution for consumer and embedded applications.
Functional Block Diagram
PCI-Express Gen1, Gen2 &
Gen3 Compliant
Supports Serial ATA (SATA) at
100 MHz
Low power differential output
buffers
No termination resistors required
Dedicated active low output
enable pins for each output
Pin selectable spread control
Selectable frequencies: 100, 125,
and 200 MHz
Up two PCI-Express clocks
25 MHz reference clock
25 MHz Crystal Input or Clock
input
I2C support with readback
capabilities
Triangular spread spectrum
profile for maximum
electromagnetic interference
(EMI) reduction
Extended Temperature
–40 to 85oC
3.3 V Power supply
24-pin QFN package
Network Attached Storage
Multi-function Printer
Ideal for Thunderbolt applications
Wireless Access Point
Routers
Control
RAM
Control & Memory
XIN/CLKIN
XOUT
SCLK
SDATA
SSC [1:0]
OE#_DIFF [1:0]
DIFF0
DIFF1
25MHz
PLL1
(SSC)
OE#_REF
Divider
Patents pending
Ordering Information:
See page 17
Pin Assignments
VDD_REF
REF
OE_REF
1
VSS_REF
VDD_DIFF
OE_DIFF0
1
1
2
3
4
5
6
24
23
22
21
20
19
7
8
9
10
11
12
18
17
16
15
14
13
25
GND
OE_DIFF1
1
VDD_DIFF
DIFF1
DIFF1
DIFF0
DIFF0
Note
1. Internal 100 k-ohm pull-down resistor


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