FS6131-01 Datasheet, PDF (1/39 Pages) List of Unclassifed Manufacturers – Programmable Line Lock Clock Generator IC

FS6131-01
Programmable Line Lock Clock Generator IC
1.0 Features
• Complete programmable control via I²C^ä-bus
• Selectable CMOS or PECL compatible outputs
• External feedback loop capability allows genlocking
• Tunable VCXO loop for jitter attenuation
• Commercial (FS6131-01) and industrial (FS6131-01i)
temperature versions available
3.0 Applications
• Frequency Synthesis
• Line-Locked and Genlock Applications
• Clock Multiplication
• Telecom Jitter Attenuation
Figure 1: Pin Configuration
2.0 Description
The FS6131-01 is a monolithic CMOS clock genera-
tor/regenerator IC designed to minimize cost and compo-
nent count in a variety of electronic systems. Via the I²C-
bus interface, the FS6131-01 can be adapted to many
clock generation requirements.
The ability to tune the on-board voltage-controlled crystal
oscillator (VCXO), the length of the Reference and Feed-
back Dividers, their granularity, and the flexibility of the
Post Divider make the FS6131-01 the most flexible
stand-alone phase-locked loop (PLL) clock generator
available.
SCL 1
SDA 2
ADDR 3
VSS 4
XIN 5
XOUT 6
XTUNE 7
VDD 8
16 CLKN
15 CLKP
14 VDD
13 FBK
12 REF
11 VSS
10 EXTLF
9 LOCK/IPRG
16-pin 0.150" SOIC
Figure 2: Block Diagram
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
(N_R)
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]
C_LF
C_LP
R_LF
EXTLF
(optional)
Lock
CMOS
1
Detect
0
POST3[1:0]
POST2[1:0]
GBL
POST1[1:0]
LOCK/
IPRG
(optional)
Phase-
Frequency
Detector
UP
Charge
Pump
DOWN
Voltage
Controlled
Oscillator
Feedback
Divider (N_F)
FBKDIV[13:0]
11
01
10
00
FBKDSRC[1:0]
11
01
00
10
Clock
Gobbler
OUTMUX[1:0]
(f_VCO)
Post
Divider
(N_Px)
CMOS/PECL
Output
MAIN LOOP
FS6131
CLKP
(f_CLK)
CLKN
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specifications as may be required to permit improvements in the design of its products.