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8T49N008A-000NLGI8

Description
IC CLK GEN LVDS/LVPECL 40VFQFN
Categorysemiconductor    Analog mixed-signal IC   
File Size472KB,38 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
Environmental Compliance
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8T49N008A-000NLGI8 Overview

IC CLK GEN LVDS/LVPECL 40VFQFN

8T49N008A-000NLGI8 Parametric

Parameter NameAttribute value
PLLWith bypass
entercrystal
outputLVPECL
Number of circuits1
Ratio - Input:Output1:8
Differential - Input:OutputNo/Yes
Frequency - maximum200MHz
Frequency divider/multiplieryes/no
Voltage - Power2.375 V ~ 3.465 V
Operating temperature-40°C ~ 85°C
Installation typesurface mount
Package/casing40-VFQFN Exposed Pad
Supplier device packaging40-VQFN(6x6)
Programmable FemtoClock
®
NG LVPECL/LVDS
Clock Generator with 8-Outputs
IDT8T49N008I
DATASHEET
General Description
The IDT8T49N008I is an eight output Clock Synthesizer with
selectable LVDS or LVPECL outputs. The IDT8T49N008I can
synthesize 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
Eight selectable LVPECL or LVDS outputs
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 (2.5 Gb/S), Gen 2 (5 Gb/s) and Gen 3 (8 Gb/s) jitter
compliant
-40°C to 85°C ambient operating temperature
Lead-free (RoHS 6) packaging
Pin Assignment
Q4
nQ4
Q5
nQ5
V
CCO
Q6
nQ6
Q7
nQ7
V
EE
30 29 28 27 26 25 24 23 22 21
V
EE
SCLK
SDATA
V
EE
V
CCA
LOCK
V
EE
V
CC
CLK_SEL
V
EE
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9 10
20
19
18
17
16
15
14
13
12
11
FSEL1
V
CC
V
EE
ADDR_SEL
FSEL0
nCLK
CLK
V
EE
XTAL_OUT
XTAL_IN
IDT8T49N008I
40-Lead VFQFN
6mm x 6mm x 0.925mm package body
4.65mm x 4.65mm E-Pad
NL Package
IDT8T49N008ANLGI REVISION A FEBRUARY 13, 2014
1
Q0
nQ0
Q1
nQ1
V
CCO
Q2
nQ2
Q3
nQ3
V
EE
©2014 Integrated Device Technology, Inc.

8T49N008A-000NLGI8 Related Products

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Description IC CLK GEN LVDS/LVPECL 40VFQFN IC CLK GEN LVDS/LVPECL 40VFQFN IC CLK GEN LVDS/LVPECL 40VFQFN
PLL With bypass With bypass With bypass
enter crystal HCSL,LVDS,LVPECL HCSL, LVDS, LVPECL, Crystal
output LVPECL LVPECL LVPECL
Number of circuits 1 1 1
Ratio - Input:Output 1:8 1:8 1:8
Differential - Input:Output No/Yes Yes Yes Yes Yes
Frequency - maximum 200MHz 100MHz 156.25MHz
Frequency divider/multiplier yes/no yes/no yes/no
Voltage - Power 2.375 V ~ 3.465 V 2.375 V ~ 3.465 V 2.375 V ~ 3.465 V
Operating temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Installation type surface mount surface mount surface mount
Package/casing 40-VFQFN Exposed Pad 40-VFQFN Exposed Pad 40-VFQFN Exposed Pad
Supplier device packaging 40-VQFN(6x6) 40-VQFN(6x6) 40-VQFN(6x6)
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