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843002AGI-01LFT

Description
Clock Synthesizer / Jitter Cleaner 2 LVPECL OUT SYNTHESIZER
Categorysemiconductor    Analog mixed-signal IC   
File Size304KB,17 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
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843002AGI-01LFT Overview

Clock Synthesizer / Jitter Cleaner 2 LVPECL OUT SYNTHESIZER

843002AGI-01LFT Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerIDT (Integrated Device Technology, Inc.)
Product CategoryClock Synthesizer / Jitter Cleaner
RoHSDetails
Mounting StyleSMD/SMT
Package / CaseTSSOP-20
PackagingReel
Height1 mm
Length6.5 mm
Width4.4 mm
Factory Pack Quantity3000
Unit Weight0.006737 oz
FemtoClocks® Crystal-to-
3.3V, 2.5V LVPECL Frequency Synthesizer
G
ENERAL
D
ESCRIPTION
The 843002I-01 is a 2 output LVPECL synthesizer optimized to
generate Ethernet reference clock frequencies. Using a 25MHz
18pF parallel resonant crystal, the following frequencies can be
generated based on the 2 frequency select pins (F_SEL[1:0]):
156.25MHz, 125MHz, and 62.5MHz. The 843002I-01 uses
IDT’s FemtoClock
®
low phase noise VCO technology and can
achieve 1ps or lower typical rms phase jitter, easily meeting
Ethernetjitter requirements. The 843002I-01 is packaged in a
small 20-pin TSSOP package.
843002I-01
DATASHEET
F
EATURES
• Two 3.3V or 2.5V LVPECL outputs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
• Supports the following output frequencies:
156.25MHz, 125MHz and 62.5MHz
• VCO range: 560MHz - 680MHz
• RMS phase jitter @ 156.25MHz, using a 25MHz crystal
(1.875MHz-20MHz): 0.55ps (typical)
• Output skew: 30ps (maximum)
• Supply Voltage Modes
Core/Outputs
3.3/3.3
2.5/2.5
• -40°C to 85°C ambient operating temperature
• Available in lead-free RoHS-compliant package
F
REQUENCY
S
ELECT
F
UNCTION
T
ABLE
Inputs
F_SEL1
0
0
1
1
F_SEL0
0
1
0
1
M Divider
Value
25
25
25
25
N Divider
Value
4
5
10
5
Output Frequency
(25MHz Ref.)
156.25 (default)
125
62.5
125
P
IN
A
SSIGNMENT
nc
V
CCO
Q0
nQ0
MR
nPLL_SEL
nc
V
CCA
F_SEL0
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CCO
Q1
nQ1
V
EE
V
CC
nXTAL_SEL
REF_CLK
XTAL_IN
XTAL_OUT
F_SEL1
843002I-01
B
LOCK
D
IAGRAM
F_SEL[1:0]
Pulldown
nPLL_SEL
Pulldown
2
20-Lead TSSOP
6.5mm x 4.4mm x 0.92mm
package body
G Package
Q0
Top View
F_SEL[1:0]
00
01
10
11
÷4
(default)
÷5
÷10
÷5
nQ0
REF_CLK
Pulldown
1
1
Q1
nQ1
25MHz
XTAL_IN
XTAL_OUT
nXTAL_SEL
Pulldown
OSC
0
Phase
Detector
VCO
625MHz
(w/25MHz
Reference)
0
M = 25 (fixed)
MR
Pulldown
843002I-01 REVISION A 2/20/15
1
©2015 Integrated Device Technology, Inc.
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