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| 型號(hào)： | FS6131-01 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Programmable Line Lock Clock Generator IC |
| 中文描述： | 可編程線鎖定時(shí)鐘發(fā)生器IC |
| 文件頁(yè)數(shù)： | 32/39頁(yè) |
| 文件大小： | 435K |
| 代理商： | FS6131-01 |
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32
FS6131-01
Programmable Line Lock Clock Generator IC
12.0 Device Application:
Stand-Alone Clock Generation
The length of the reference and feedback dividers, their
granularity, and the flexibility of the post Divider make the
FS6131 the most flexible monolithic stand-alone PLL
clock generation device available. The effective block
diagram of the FS6131 when programmed for Stand-
Alone mode is shown in Figure 30.
The source of the Feedback Divider in the Stand-Alone
mode is the output of the VCO. By dividing the input ref-
erence frequency down by Reference Divider (N
R
), then
multiplying it up in the Main Loop through the Feedback
Divider (N
F
), and finally dividing the Main Loop output
frequency by the Post Divider (N
Px
), we have the defining
relationship for this mode. The equation for the output
clock frequency (f
CLK
) can be written as
N
f
f
=
Px
R
F
REF
CLK
N
N
1
,
(Eqn.1)
where the reference source frequency (f
REF
) can be either
supplied by the VCXO or applied to the REF pin.
Great flexibility is permitted in the programming of the
FS6131 to achieve exact desired output frequencies
since three integers are involved in the computation.
12.1
A Visual BASIC program is available to completely pro-
gram the FS6131 based on the given parameters.
Suppose that the reference source frequency is
14.318MHz and the desired output frequency is 100MHz.
First, factor the 14.318MHz reference frequency (which is
four times the NTSC television color sub-carrier) into
prime numbers. The exact expression is
Example Calculation
11
7
5
3
2
81
.
14318181
1
7
2
5
×
×
×
=
=
REF
f
.
Figure 30: Block Diagram: Stand-Alone Clock Generation
FS6131
VCXO
Divider
(optional)
(optional)
CRYSTAL LOOP
MAIN LOOP
VCXO
XOUT
XIN
Control
ROM
XTUNE
(optional)
Reference
Divider
(N
R
)
Phase-
Frequency
Detector
Charge
Pump
DOWN
UP
REF
FBK
Phase-
Frequency
Detector
Charge
Pump
DOWN
UP
Internal
Loop
Filter
EXTLF
I
2
C
Interface
SCL
SDA
ADDR
Registers
POST3[1:0]
POST2[1:0]
POST1[1:0]
REFDIV[11:0]
EXTLF
PDREF
PDFBK
VCOSPD,
OSCTYPE
LFTC
MLCP[1:0]
XLCP[1:0]
XLROM[2:0]
XLPDEN,
XLSWAP
REFDSRC
XCT[3:0],
XLVTEN
(f
REF
)
(f
VCO
)
LOCK/
IPRG
(optional)
Post
Divider
(N
Px
)
Voltage
Controlled
Oscillator
Lock
Detect
CMOS
STAT[1:0]
OM[1:0]
Clock
Gobbler
GBL
Feedback
Divider
(N
F
)
FBKDIV[14:0]
FBKDSRC[1:0]
CMOS/PECL
Output
CLKN
(f
CLK
)
CLKP
R
LF
C
LF
R
IPRG
C
LP
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FS6131-01G | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Programmable Line Lock Clock Generator IC |
| FS6131-01G-XTD | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| FS6131-01G-XTP | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| FS6131-01I-XTD | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK (IND) RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
| FS6131-01I-XTP | 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 I2C PROG PLL CLK IND RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56 |
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