Quad Output Clock Generator - IDT
Description
IDT5V927 QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
QUAD OUTPUT CLOCK GENERATOR
IDT5V927
FEATURES:
• • • • • • • •
3V to 3.
6V operating voltage 50MHz to 160MHz output frequency range Input from fundamental crystal oscillator or external source Internal PLL feedback (loading feedback output relative to other outputs, adjusts 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 <500µ A) Available in TSSOP package
The IDT5V927 is a low-cost, low skew, low jitter, and high-performance clock synthesizer.
It has been specially designed to interface with Gigabit Ethernet (125MHz), Fibre Channel (106.
25MHz), and OC-3 (155.
52MHz) applications.
It can be programmed to provide output frequencies ranging from 50MHz to 160MHz, with input frequencies ranging from 6.
25MHz to 80MHz.
The IDT5V927 includes an internal RC filter that provides excellent jitter characteristics and eliminates the need for external components.
When using the optional crystal input, the chip accepts a 10 - 40MHz fundamental mode crystal with a maximum equivalent series resistance of 50Ω.
DESCRIPTION:
APPLICATIONS:
• • • • • • Gigabit ethernet Router Network switches SAN Instrumentation Fibre channel
FUNCTIONAL BLOCK DIAGRAM
OE VCO DIVIDE 1/N
REF
PHASE DETECTOR
CHARGE PUM P
LOO P FILTER
VCO
Q0
Q1 0 Q2 1 Q3 X2 CRYSTAL O SCILLATO R X1
SELECT M O DE
S1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
S0
INDUSTRIAL TEMPERATURE RANGE
1
c 2003 Integrated Device Technology, Inc.
FEBRUARY 2003
DSC 5853/6
IDT5V927 QUAD OUTPUT CLOCK GENERATOR
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
REF X1 X2 VDD Q0 GND Q1 VDDQ 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 S0 S1 OE GND Q3 GND Q2 VDDQ
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VDD/VDDQ VI IO TSTG TJ Description Supply Voltage ...
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