FS6131 Ver la hoja de datos (PDF) - ON Semiconductor
Número de pieza
componentes Descripción
Fabricante
FS6131 Datasheet PDF : 44 Pages
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FS6131
XTUNE
(optional)
XIN
XOUT
(optional)
REF
FBK
ADDR
SCL
SDA
XCT[3:0],
XLVTEN
VCXO
Control
ROM
VCXO
Divider
REFDIV[11:0]
0 (fREF)
1
REFDSRC
Reference
Divider
(NR)
PDREF
0
1
1
0
PDFBK
I2C
Interface
Registers
XLROM[2:0]
XLPDEN,
XLSWAP
CRYSTAL LOOP
XLCP[1:0]
Phase-
Frequency
Detector
UP
Charge
Pump
DOWN
MLCP[1:0]
VCOSPD,
OSCTYPE
LFTC
Internal
Loop
Filter
0
1
EXTLF
STAT[1:0]
CLF
CLP
RLF
EXTLF
(optional)
Lock
CMOS
1
Detect
0
GBL
POST3[1:0]
POST2[1:0]
POST1[1:0]
LOCK/
IPRG
(optional)
Phase-
Frequency
Detector
UP
Charge
Pump
DOWN
Voltage
Controlled
Oscillator
Feedback
Divider (NF)
FBKDIV[13:0]
11
01
10
00
FBKDSRC[1:0]
11
01
00
10
Clock
Gobbler
OUTMUX[1:0]
(fVCO)
Post
Divider
(NPx)
CMOS/PECL
Output
MAIN LOOP
FS6131
CLKP
(fCLK)
CLKN
Figure 2: Block Diagram
Table 1: Pin Descriptions
Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DIU = Input with Internal Pull-Up; DID = Input with Internal Pull-Down;
DIO = Digital Input/Output; DI-3 = Three-Level Digital Input, DO = Digital Output; P = Power/Ground; # = Active Low pin
Pin
Type
Name
Description
1
DI
SCL
Serial interface clock (requires an external pull-up)
2
DIO
SDA
Serial interface data input/output (requires an external pull-up)
3
DI
ADDR
Address select bit (see Section 5.2.1)
4
P
VSS
Ground
5
AI
XIN
VCXO feedback
6
AO
XOUT
VCXO drive
7
AI
XTUNE
VCXO tune
8
P
VDD
Power supply (+5V)
9
DIO
LOCK/IPRG
Lock indicator / PECL current drive programming
10
AI
EXTLF
External loop filter
11
P
VSS
Ground
12
DI
REF
Reference frequency input
13
DI
FBK
Feedback input
14
P
VDD
Power supply (+5V)
15
DO
CLKP
Differential clock output (+)
16
DO
CLKN
Differential clock output (-)
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