SI5366 datasheet(9/20 Pages) SILABS

No. de pieza	SI5366

Descripción Electrónicos	PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR

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Fabricante Electrónico	SILABS [Silicon Laboratories]

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Si5366

Preliminary Rev. 0.2

9

13

57

CS0_C3A

CS1_C4A

I/O

LVCMOS

Input Clock Select/CKINn Active Clock Indicator.

If manual clock selection mode is chosen (AUTOSEL = L), the

CS[1:0] pins function as the manual input clock selector con-

trol.

These inputs are internally deglitched to prevent inadvertent

clock switching during changes in the CSn input state.

If automatic clock detection is chosen (AUTOSEL = M or H),

these pins function as the CKINn active clock indicator output.

0 = CKINn is not the active input clock.

1 = CKINn is currently the active input clock to the PLL.

This pin has a weak pull-down.

16

17

XA

XB

IANALOG

External Crystal or Reference Clock.

External crystal should be connected to these pins to use inter-

nal oscillator based reference. If external reference is used,

apply reference clock to XA input and leave XB pin floating.

External reference must be from a high-quality clock source

(TCXO, OCXO). Frequency of crystal or external clock is set by

the RATE pin. When used with an external 38.88 MHz refer-

ence, AC couple to XA and leave XB as a no connect.

20

FS_SW

I

LVCMOS

FSYNC Inputs to Clock Selection Enable.

If CK_CONF = 1, this pin enables the use of the CKIN3 and

CKIN4 loss-of-signal indicators as inputs to the clock selection

state machine.

0 = Do not use CKIN3 and CKIN4 LOS indicators as inputs to

the clock selection state machine.

1 = Use CKIN3 and CKIN4 LOS indicators as inputs to the

clock selection state machine.

This pin has a weak pull-down.

21

FS_ALIGN

I

LVCMOS

FSYNC Alignment Control.

If CK_CONF = 1, a logic high on this pin causes the FS_OUT

phase to be realigned to the rising edge of the currently active

input sync (CKIN3 or CKIN4).

0 = No realignment.

1 = Realignment.

This pin has a weak pull-down.

22

AUTOSEL

I

3-Level

Manual/Automatic Clock Selection.

Three level input that selects the method of input clock selec-

tion to be used.

L = Manual.

M = Automatic non-revertive.

H = Automatic revertive.

Table 3. Si5366 Pin Descriptions (Continued)

Pin #

Pin Name

I/O

Signal Level

Description

CS[1:0]

Active Input Clock

00

CKIN1

01

CKIN2

10

CKIN3

11

CKIN4

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Descripción similar - SI5366

Fabricante Electrónico	No. de pieza	Datasheet	Descripción Electrónicos
Skyworks Solutions Inc.	SI5366	613Kb / 31P	PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR Rev. 1.0
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