EEWORLDEEWORLDEEWORLD

Part Number

Search

843003AGT

Description
FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
File Size360KB,21 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
Download Datasheet Compare View All

843003AGT Overview

FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER

FemtoClocks™ Crystal-to-3.3V LVPECL
Frequency Synthesizer
843003
DATA SHEET
General Description
The 843003 is a 3 differential output LVPECL Synthesizer
designed to generate Ethernet refer- ence clock frequencies.
Using a 31.25MHz or 26.041666MHz, 18pF parallel resonant
crystal, the following frequencies can be generated based on the
settings of 4 fre- quency select pins (DIV_SEL[A1:A0],
DIV_SEL[B1:B0]): 625MHz, 312.5MHz, 156.25MHz, and
125MHz. The 843003 has 2 output banks, Bank A with 1
differential LVPECL output pair and Bank B with 2 differential
LVPECL output pairs.
The two banks have their own dedicated frequency select pins and
can be independently set for the frequencies mentioned above.
The 843003 uses IDT’s 3
rd
generation low phase noise VCO
technology and can achieve 1ps or lower typical rms phase jitter,
easily meeting Ethernet jitter requirements. The 843003 is
packaged in a small 24-pin TSSOP package.
Features
Three 3.3V LVPECL outputs on two banks, A Bank with one
LVPECL pair and B Bank with 2 LVPECL output pairs
Using a 31.25MHz or 26.041666 crystal, the two output banks
can be independently set for 625MHz, 312.5MHz, 156.25MHz
or 125MHz
Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
VCO range: 560MHz – 700MHz
RMS phase jitter @ 156.25MHz (1.875MHz - 20MHz):
0.51ps (typical)
Offset
Noise Power
100Hz ................ -96.8 dBc/Hz
1kHz .................. -119.1 dBc/Hz
10kHz ................ -126.4 dBc/Hz
100kHz .............. -127.0 dBc/Hz
Pin Assignment
DIV_SELB0
VCO_SEL
MR
V
CCO_A
QA0
nQA0
OEB
OEA
FB_DIV
V
CCA
V
CC
DIV_SELA0
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
DIV_SELB1
V
CCO_B
QB0
nQB0
QB1
nQB1
XTAL_SEL
TEST_CLK
XTAL_IN
XTAL_OUT
V
EE
DIV_SELA1
Full 3.3V supply mode
0°C to 70°C ambient operating temperature
Industrial temperature available upon request
Available in ead-free (RoHS 6) package
843003
24-Lead TSSOP
4.4mm x 7.8mm x 0.925mm
package body
G Package
Block Diagram
OEA
Pullup
DIV_SELA[1:0]
Pulldown:Pullup
VCO_SEL
Pullup
TEST_CLK
Pulldown
00
01
10
11
÷1
÷2
(default)
÷4
÷5
2
QA0
0
nQA0
0
XTAL_IN
OSC
XTAL_OUT
XTAL_SEL
Pullup
1
Phase
Detector
VCO
625MHz
1
QB0
FB_DIV
0 = ÷20 (default)
1 = ÷24
00
01
10
11
÷1
÷2
÷4
(default)
÷5
nQB0
QB1
nQB1
FB_DIV
Pulldown
DIV_SELB[1:0]
Pullup:Pulldown
MR
Pulldown
OEB
Pullup
2
843003 Rev A 4/7/15
1
©2015 Integrated Device Technology, Inc.

843003AGT Related Products

843003AGT 843003AG
Description FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER FEMTOCLOCKS™ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
2008 Highlights: Future Hot Applications of GPS
Since 2004, the navigation market in Europe and the United States has shown a rapid growth momentum, with an annual growth rate of more than 100%. While the European and American markets are growing w...
1ying Automotive Electronics
Looking for a good and cheap serial port expansion chip for 51 microcontroller
I am looking for a good and cheap serial port expansion chip. It can be used on 51 microcontrollers to expand one serial port to more than 4. Thank you....
wellee Embedded System
How does Ring0 call Nt* series service routines?
I want to use the native API NtQuerySystemInformation in my driver, but it always returns 0xc0000005 error, while calling ZwQuerySystemInformation works fine. Someone said that the parameter of Nt* sh...
2315862 Embedded System
Rookie - How to calm our hearts in learning!
I am new to operating systems and I don't know anything. I read a lot of books. How can we get started and improve? Moderators, please point out a bright road for a novice like me! ! ! ! ! !...
long10112 Embedded System
How to implement 0-999 counting with Xilinx? Please guide
How to implement 0-999 counting with Xilinx? Please guide...
笨鸟的世界 Analog electronics
Quartus II
Can I use the same entity name in different projects?...
CRRBravery FPGA/CPLD

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2482  2543  2548  1901  2382  50  52  39  48  1 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号