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8T49N004A-072NLGI8

Description
Clock Generators & Support Products Prog FemtoClock NG LVPECL/LVDS 4-Output
Categorysemiconductor    Analog mixed-signal IC   
File Size756KB,37 Pages
ManufacturerIDT (Integrated Device Technology)
Environmental Compliance
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8T49N004A-072NLGI8 Overview

Clock Generators & Support Products Prog FemtoClock NG LVPECL/LVDS 4-Output

8T49N004A-072NLGI8 Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerIDT (Integrated Device Technology)
Product CategoryClock Generators & Support Products
RoHSDetails
PackagingReel
Factory Pack Quantity2500
Programmable FemtoClock
®
NG LVPECL/LVDS
Clock Generator with 4-Outputs
IDT8T49N004I
DATASHEET
General Description
The IDT8T49N004I is a four output Clock Generator with selectable
LVDS or LVPECL outputs. The IDT8T49N004I can generate any one
of four frequencies from a single crystal or reference clock. The four
frequencies are selected from the Frequency Selection Table (Table
3A) and are programmed via I
2
C interface. The four predefined
frequencies are selected in the user application by two frequency
selection pins. Note the desired programmed frequencies must be
used with the corresponding crystal or clock frequency as indicated
in Table 3A.
Excellent phase noise performance is maintained with IDT’s Fourth
Generation FemtoClock
®
NG PLL technology, which delivers
sub-400fs RMS phase jitter.
Features
Fourth Generation FemtoClock NG PLL technology
Four selectable LVPECL or LVDS outputs via I
2
C
CLK, nCLK input pair can accept the following differential input
levels: LVPECL, LVDS, HCSL
FemtoClock NG VCO Range: 1.91GHz - 2.5GHz
RMS phase jitter at 156.25MHz (12kHz - 20MHz):
228fs (typical)
RMS phase jitter at 156.25MHz (10kHz - 1MHz): 175fs (typical)
Full 2.5V or 3.3V power supply
I
2
C programming interface
PCI Express (2.5Gb/s), Gen 2 (5Gb/s), and Gen 3 (8Gb/s)
jitter compliant
-40°C to 85°C ambient operating temperature
Lead-free (RoHS 6) packaging
Pin Assignment
V
CCO
nQ2
nQ3
24 23 22 21 20 19 18 17
16
15
14
13
12
11
10
9
1
V
EE
2
Q0
3
nQ0
4
V
CCO
5
Q1
6
nQ1
7
V
EE
8
nc
V
EE
Q2
Q3
FSEL1
V
CC
SCLK
SDATA
V
EE
25
26
27
28
29
30
31
32
V
EE
V
EE
FSEL0
nCLK
CLK
V
EE
XTAL_OUT
XTAL_IN
V
CCA
LOCK
V
EE
V
CC
CLK_SEL
IDT8T49N004I
32-Lead VFQFN
5mm x 5mm x 0.925mm package body
3.15mm x 3.15mm E-Pad
NL Package
IDT8T49N004ANLGI REVISION A OCTOBER 15, 2013
1
©2013 Integrated Device Technology, Inc.
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