SY89831U Datasheet, PDF (1/11 Pages) Micrel Semiconductor – ULTRA-PRECISION 1:4 LVPECL FANOUT BUFFER/TRANSLATOR WITH INTERNAL TERMINATION

Micrel, Inc.
ULTRA-PRECISION 1:4 LVPECL
FANOUT BUFFER/TRANSLATOR
WITH INTERNAL TERMINATION
Precision Edge®
Precision E^SYd⁸g⁹e^83®1U
SY89831U
FEATURES
s Guaranteed AC performance over temperature
and voltage:
• DC-to > 2.0GHz throughput
• <450ps propagation delay (IN-to-Q)
• < 20ps within-device skew
• < 225ps rise/fall time
s Ultra-low jitter design:
• < 1ps_RMS cycle-to-cycle jitter
• < 1ps_RMS random jitter
• < 10ps_PP deterministic jitter
• < 10ps_PP total jitter (clock)
s Unique patent-pending input termination and VT pin
accepts DC- and AC-coupled differential inputs
s 800mV, 100K LVPECL output swing
s Power supply 2.5V ±5% or 3.3V ±10%
s Industrial temperature range: –40°C to +85°C
s Available in 16-pin (3mm × 3mm) MLF^® package
APPLICATIONS
Precision Edge^®
DESCRIPTION
The SY89831U is a high-speed, 2GHz differential
LVPECL 1:4 fanout buffer optimized for ultra-low skew
applications. Within device skew is guaranteed to be less
than 20ps (5ps typ.) over supply voltage and temperature.
The differential input buffer has a unique internal termination
design that allows access to the termination network through
a VT pin. This feature allows the device to easily interface
to different logic standards. A VREF–AC reference output is
included for AC-coupled applications.
The SY89831U is a part of Micrel's high-speed clock
synchronization family. For applications that require a
different I/O combination, consult Micrel’s website at
www.micrel.com, and choose from a comprehensive product
line of high-speed, low-skew fanout buffers, translators and
clock generators.
s Processor clock distribution
s SONET clock distribution
s Fibre Channel clock distribution
s Gigabit Ethernet clock distribution
FUNCTIONAL BLOCK DIAGRAM
1:4
IN
50Ω
VT
50Ω
/IN
VREF-AC
EN
(TTL/CMOS)
DQ
TYPICAL PERFORMANCE
155MHz Output
Q0
/Q0
/Q
Q1
/Q1
Q2
Q
/Q2
T_A = 25°C
V_CC = 3.3V
V_EE GND
V_IN = 800mV
Q3
TIME (1ns/div.)
/Q3
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
M9999-020707
[e-mail] or [phone]
1
Rev.: D Amendment: /0
Issue Date: February 2007