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844008BYI-15LFT

Description
Clock Generators u0026 Support Products 8 LVDS OUT SYNTHESIZER
Categorysemiconductor    Analog mixed-signal IC   
File Size290KB,15 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
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844008BYI-15LFT Overview

Clock Generators u0026 Support Products 8 LVDS OUT SYNTHESIZER

844008BYI-15LFT Parametric

Parameter NameAttribute value
Product CategoryClock Generators & Support Products
ManufacturerIDT (Integrated Device Technology, Inc.)
RoHSDetails
PackagingCut Tape
PackagingReel
Moisture SensitiveYes
Factory Pack Quantity2000
FemtoClock
®
Crystal-to-LVDS
Frequency Synthesizer
G
ENERAL
D
ESCRIPTION
The 844008I-15 is an 8 output LVDS Synthesizer optimized to
generate PCI Express™ reference clock frequencies and is a
member of the high performance clock solutions from IDT. Using a
25MHz parallel resonant crystal, the following frequencies can be
generated based on F_SEL pin: 100MHz or 125MHz. The 844008I-
15 uses IDT’s 3
rd
generation low phase noise VCO technology
and can achieve <1ps typical rms phase jitter, easily meeting PCI
Express jitter requirements. The 844008I-15 is packaged in a 32-
pin LQFP package.
844008I-15
DATASHEET
F
EATURES
• Eight LVDS outputs
• Crystal oscillator interface
• Supports the following output frequencies:
100MHz or 125MHz
• VCO: 500MHz
• RMS phase jitter @ 125MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.42ps (typical)
• Full 3.3V supply modes
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package
F
REQUENCY
S
ELECT
F
UNCTION
T
ABLE
Input
Input
Frequency
(MHz)
25MHz
25MHz
M Divider
Value
20
20
N Divider
Value
4
5
M/N Divider
Value
5
4
Output
Frequency
(MHz)
125
100 (default)
F_SEL
0
1
B
LOCK
D
IAGRAM
OE1
Pullup
P
IN
A
SSIGNMENT
XTAL_OUT
nPLL_SEL
XTAL_IN
GND
V
DDA
OE1
OE2
Q0
V
DD
nQ0
Q1
32 31 30 29 28 27 26 25
Q0
nQ0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
F_SEL
Q3
nQ3
V
DD
GND
Q4
nQ4
MR
24
23
Q7
nQ7
V
DD
Q6
nQ6
GND
Q5
nQ5
nPLL_SEL
Pulldown
1
XTAL_IN
25MHz
nQ1
Q2
OSC
XTAL_OUT
Phase
Detector
VCO
500MHz
(w/25MHz
Reference)
V
DD
Q1
nQ1
GND
Q2
ICS844008I-15
32-Lead LQFP
7mm x 7mm x 1.4mm
package body
Y Package
Top View
22
21
20
19
18
17
0
÷4
÷5
nQ2
Q3
nQ3
M =
÷
20 (fixed)
Q4
nQ4
Q5
nQ5
Q6
nQ6
Q7
nQ2
MR
Pulldown
F_SEL
OE2
Pullup
Pullup
nQ7
844008I-15 REVISION B 7/2/15
1
©2015 Integrated Device Technology, Inc.

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844008BYI-15LFT 844008BYI-15LF
Description Clock Generators u0026 Support Products 8 LVDS OUT SYNTHESIZER Clock Generators u0026 Support Products 8 LVDS OUT SYNTHESIZER
Product Category Clock Generators & Support Products Clock Generators & Support Products
Manufacturer IDT (Integrated Device Technology, Inc.) IDT (Integrated Device Technology, Inc.)
RoHS Details Details
Moisture Sensitive Yes Yes
Factory Pack Quantity 2000 250
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