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FS7140-01 Datasheet(PDF) 1 Page - AMI SEMICONDUCTOR

Part # FS7140-01
Description  Programmable Phase-Locked Loop Clock Generator
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Manufacturer  AMI [AMI SEMICONDUCTOR]
Direct Link  http://www.amis.com
Logo AMI - AMI SEMICONDUCTOR

FS7140-01 Datasheet(HTML) 1 Page - AMI SEMICONDUCTOR

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AMI Semiconductor - Rev. 3.0
www.amis.com
FS7140-01 / FS7140-01g / FS7145 Programmable Phase-Locked Loop Clock Generator Data Sheet
1.0 Features
• Extremely flexible and low-jitter phase-locked loop (PLL)
frequency synthesis
• No external loop filter components needed
• 150MHz CMOS or 340MHz PECL outputs
• Completely configurable via I2C™-bus
• Up to four FS7140 or FS7145 can be used on a single
I2C-bus
• 3.3V operation
• Independent on-chip crystal oscillator and external
reference input
• Very low "cumulative" jitter
1
16
2
3
4
5
6
7
8
15
14
13
12
11
10
9
IPRG
1
16
2
3
4
5
6
7
8
15
14
13
12
11
10
9
n/c
VSS
REF
n/c
VDD
CLKP
CLKN
SCL
SDA
ADDR0
VSS
XIN
XOUT
ADDR1
VDD
1
16
2
3
4
5
6
7
8
15
14
13
12
11
10
9
IPRG
n/c
VSS
REF
SYNC
VDD
CLKP
CLKN
SCL
SDA
ADDR0
VSS
XIN
XOUT
ADDR1
VDD
Figure 1: Pin Configuration:
16-pin (0.150”) SOIC, 16-pin (5.3mm) SSOP
2.0 Description
The FS7140 / FS7145 is a monolithic CMOS clock gen-
erator/regenerator IC designed to minimize cost and
component count in a variety of electronic systems. Via the I2C-
bus interface, the FS714x can be adapted to many clock
generation requirements.
The length of the reference and feedback dividers, their fine
granularity, and the flexibility of the post divider make the
FS714x the most flexible stand-alone phase-locked loop (PLL)
clock generator available.
FS7140 / FS7145
Crystal
Oscillator
XOUT
XIN
Reference
Divider
(N
R)
Phase-
Frequency
Detector
Charge
Pump
UP
DOWN
REF
Feedback
Divider (N
F)
Loop
Filter
I2C
Interface
SCL
SDA
ADDR[1:0]
Registers
IPRG
Post
Divider
(N
Px)
Voltage
Controlled
Oscillator
CMOS/PECL
Output
CLKN
CLKP
SYNC
(FS7145 only)
Sync
Control
Figure 2: Device Block Diagram
3.0 Applications
• Precision frequency synthesis
• Low-frequency clock multiplication
• Video line-locked clock generation
• Laser beam printers (FS7145)


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