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844008AKI-46LFT

Description
Clock Generators u0026 Support Products 8 LVDS OUT CLOCK SYNTHESIZER
Categorysemiconductor    Analog mixed-signal IC   
File Size304KB,16 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
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844008AKI-46LFT Overview

Clock Generators u0026 Support Products 8 LVDS OUT CLOCK SYNTHESIZER

844008AKI-46LFT Parametric

Parameter NameAttribute value
Product CategoryClock Generators & Support Products
ManufacturerIDT (Integrated Device Technology, Inc.)
RoHSDetails
Package / CaseVFQFPN-32
PackagingCut Tape
PackagingReel
Height1 mm
Length5 mm
Moisture SensitiveYes
Factory Pack Quantity2500
Width5 mm
FemtoClock
®
Crystal-to-LVDS
Clock Generator
G
ENERAL
D
ESCRIPTION
The 844008I-46 is a 10Gb Ethernet Clock Generator and a member
of the HiPerClocks™ family of high performance devices from
IDT. The 844008I-46 can synthesize 156.25MHz or 100MHz with
a 25MHz crystal. It has a total of 8 LVDS outputs. The 844008I-46
has excellent phase jitter performance and is packaged in a 32
Lead VFQFN package, making it ideal for use in systems with
limited board space.
844008I-46
DATA SHEET
F
EATURES
• Eight differential LVDS outputs
• Crystal oscillator interface designed for 18pF parallel resonant
crystals
• Supports the following output frequencies:
156.25MHz or 100MHz
• VCO frequency: 625MHz or 600MHz
• RMS phase jitter @ 156.25MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.45ps (typical)
• Full 2.5V supply mode
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) packages
• For functional replacement part use 8T49N285
F
REQUENCY
S
ELECT
F
UNCTION
T
ABLE
Input
XTAL Frequency
(MHz)
25
25
FREQ_SEL
0
1
FB Divider
÷25
÷24
Output Divider
÷4
÷6
VCO (MHz)
625
600
Output Frequency (MHz)
156.25 (default)
100
B
LOCK
D
IAGRAM
OE
Pullup
25MHz
8
P
IN
A
SSIGNMENT
FREQ_SEL
XTAL_OUT
XTAL_IN
GND
V
DDA
V
DD
XTAL_IN
OSC
Phase
Detector
VCO
625MHz or
600MHz
÷4
or
÷6
Q0:Q7
nQ0:nQ7
Q0
nQ0
1
2
3
4
nc
nc
8
XTAL_OUT
32 31 30 29 28 27 26 25
24
nc
OE
GND
nQ7
Q7
V
DDO
nQ6
Q6
FB =
÷
25 or
÷
24
GND
Q1
nQ1
V
DDO
Q2
nQ2
ICS844008I-46
23
22
FREQ_SEL
Pulldown
32-Lead VFQFN
21
5mm x 5mm x 0.925mm pack-
5
20
age body
6
19
K Package
7
Top View
18
8
9 10 11 12 13 14 15 16
Q3
nQ3
GND
Q4
nQ4
Q5
V
DDO
nQ5
17
844008I-46 REVISION A 11/6/15
1
©2015 Integrated Device Technology, Inc.
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