fs6131 AMI Semiconductor, Inc., fs6131 Datasheet - Page 2

• Manufacturer Part Number: fs6131
• Description: Fs6131-01g Programmable Line Lock Clock Generator Ic
• Manufacturer: AMI Semiconductor, Inc.

FS6131-01/FS6131-01g Programmable Line Lock Clock Generator IC
Table 1: Pin Descriptions
Key: AI = Analog Input; AO = Analog Output; DI = Digital Input; DI
DIO = Digital Input/Output; DI-3 = Three-Level Digital Input, DO = Digital Output; P = Power/Ground; # = Active Low pin
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AMI Semiconductor
www.amis.com
(optional)
XOUT
FBK
SDA
REF
SCL
XTUNE
(optional)
XIN
ADDR
1
Type
DI
DIO
DI
P
AI
AO
AI
P
DIO
AI
P
DI
DI
P
DO
DO
0
Specifications subject to change without notice
REFDSRC
– Rev. 3.0, Jan. 08
Interface
(f
REF
VCXO
I
2
)
C
XCT[3:0],
XLVTEN
Reference
REFDIV[11:0]
Divider
(N
Name
SCL
SDA
ADDR
VSS
XIN
XOUT
XTUNE
VDD
LOCK/IPRG
EXTLF
VSS
REF
FBK
VDD
CLKP
CLKN
R
)
Registers
Control
Divider
VCXO
1
0
ROM
0
1
PDREF
PDFBK
Frequency
XLROM[2:0]
Detector
Phase-
Description
Serial interface clock (requires an external pull-up)
Serial interface data input/output (requires an external pull-up)
Address select bit (see Section 5.2.1)
Ground
VCXO feedback
VCXO drive
VCXO tune
Power supply (+5V)
Lock indicator / PECL current drive programming
External loop filter
Ground
Reference frequency input
Feedback input
Power supply (+5V)
Differential clock output (+)
Differential clock output (-)
Frequency
Detector
Phase-
XLPDEN,
XLSWAP
Divider
Feedback
FBKDIV[13:0]
Figure 2: Block Diagram
DOWN
UP
(N
CRYSTAL LOOP
Charge
MLCP[1:0]
Pump
F
)
DOWN
UP
2
Charge
XLCP[1:0]
Pump
FBKDSRC[1:0]
U
= Input with Internal Pull-Up; DI
11
Controlled
Oscillator
Voltage
OSCTYPE
VCOSPD,
01
10
00
00
01
10
(f
VCO
11
)
OUTMUX[1:0]
MAIN LOOP
Gobbler
EXTLF
Clock
GBL
Internal
Loop
Filter
0
LFTC
1
POST3[1:0]
POST2[1:0]
POST1[1:0]
Divider
(N
Post
Px
D
)
= Input with Internal Pull-Down;
Detect
STAT[1:0]
FS6131
Lock
CMOS/PECL
Output
1
0
CMOS
C
R
LF
LF
C
EXTLF
(optional)
LOCK/
IPRG
(optional)
CLKP
CLKN
LP
(f
Data Sheet
CLK
)