CY2DP1504 Datasheet, PDF (1/14 Pages) Cypress Semiconductor – 1:4 LVPECL Fanout Buffer with Selectable Clock Input

CY2DP1504
1:4 LVPECL Fanout Buffer
with Selectable Clock Input
Features
■ Select one of two low-voltage positive emitter-coupled logic
(LVPECL) input pairs to distribute to four LVPECL output pairs
■ 30 ps maximum output-to-output skew
■ 480-ps maximum propagation delay
■ 0.15-ps maximum additive RMS phase jitter at 156.25 MHz
(12-kHz to 20-MHz offset)
■ Up to 1.5-GHz operation
■ Synchronous clock enable function
■ 20-pin thin shrunk small outline package (TSSOP)
■ 2.5-V or 3.3-V operating voltage^[1]
■ Commercial and industrial operating temperature range
Functional Description
The CY2DP1504 is an ultra-low noise, low-skew,
low-propagation delay 1:4 LVPECL fanout buffer targeted to
meet the requirements of high-speed clock distribution
applications. The CY2DP1504 can select between two separate
LVPECL input clock pairs using the IN_SEL pin. The
synchronous clock enable function ensures glitch-free output
transitions during enable and disable periods. The device has a
fully differential internal architecture that is optimized to achieve
low additive jitter and low skew at operating frequencies of up to
1.5 GHz.
Logic Block Diagram
V_DD
V_SS
IN0
IN0#
IN1
IN1#
IN_SEL
CLK_EN
100k
VDD
100k
Q
D
Q0
Q0#
Q1
Q1#
Q2
Q2#
Q3
Q3#
Note
1. Input AC-coupling capacitors are required for voltage-translation applications.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-56215 Rev. *F
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 10, 2011
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