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IDT5V926A Datasheet(PDF) 1 Page - Integrated Device Technology

Part No. IDT5V926A
Description  Single Output Clock Generator
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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Single Output Clock Generator
IDT5V926A
DATA SHEET
IDT5V926A REVISION A JUNE 11, 2009
1
©2009 Integrated Device Technology, Inc.
DESCRIPTION:
The IDT5V926A is a low-cost, low skew, low jitter, and
high-performance clock multiplier with a reference clock
from either a lower frequency crystal or clock input. It has
been specially designed to interface with Gigabit Ethernet
and Fast Ethernet applications by providing a 125MHz
clock from 25MHz input. It can be programmed to provide
output frequencies ranging from 48MHz to 160MHz, with
input frequencies ranging from 6MHz to 80MHz.
The IDT5V926A includes an internal RC filter that pro-
vides excellent jitter characteristics and eliminates the
need for external components. When using the optional
crystal input, the device accepts a 10 - 40MHz fundamental
mode crystal with a maximum equivalent series resistance
of 50
Ω.
FEATURES:
• 3V to 3.6V operating voltage
• 48MHz to 160MHz output frequency range
• Input from fundamental crystal oscillator or external
source
• Internal PLL feedback (loading the feedback output
relative to the other outputs, will adjust the propagation
delay between REF inputs and outputs)
• Select inputs (S[1:0]) for FB divide selection (multiply
ratio of 2, 3, 4, 4.25, 5, 6, 6.25, and 8)
• Low jitter
• PLL bypass for testing and power-down control
(S1 = H, S0 = H, powers part down <500µA)
• Available in TSSOP package
• Pin and function compatible to IDT5V926
APPLICATIONS:
• Gigabit ethernet
• Router
• Network switches
• SAN
• Instrumentation
• Fibre channel
FUNCTIONAL BLOCK DIAGRAM
X1/REF
X2
CRYSTAL
OSCILLATOR
PHASE
DETECTOR
CHARGE
PUMP
LOOP
FILTER
VCO
SELECT MODE
QOUT
QREF
S1
S0
OE
VCO DIVIDE
1/N
REFE
0
1




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