SY89834U Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 2.5V/3.3V TWO INPUT , 1GHz LVTTL/CMOS-TO-LVPECL 1:4 FANOUT BUFFER/TRANSLATOR

2.5V/3.3V TWO INPUT , 1GHz
LVTTL/CMOS-TO-LVPECL
Precision Edge™
SY89834U
1:4 FANOUT BUFFER/TRANSLATOR
FEATURES
s Guaranteed AC performance over temperature
and voltage:
• > 1.0GHz f_MAX
• < 20ps within-device skew
• < 225ps rise/fall times
s Low jitter design:
• Cycle-to-cycle: < 1ps (rms)
• Total jitter: < 10ps (pk-pk)
s Low voltage 2.5V and 3.3V supply operation
s Four differential 100k LVPECL outputs
s Wide operating temperature range: –40°C to +85°C
s Includes a 2:1 MUX select input
s Accepts single-ended TTL/CMOS inputs and
provides four LVPECL outputs
s Available in 16-pin (3mm × 3mm) MLF™ package
Precision Edge™
DESCRIPTION
The SY89834U is a high-speed, 2GHz LVTTL/CMOS-to-
LVPECL fanout buffer/translator optimized for high-speed
ultra-low skew applications. The input stage is designed to
accept two single-ended LVTTL/CMOS compatible signals
that feed into a 2:1 MUX. The selected input is translated
and distributed as four differential 100K compatible LVPECL
outputs. Within device skew is guaranteed to be less than
20ps over supply voltage and temperature.
The single-ended input buffers accept TTL/CMOS logic
levels. The internal threshold of the buffers is defined as
V_CC/2_.
The SY89834U is a part of Micrel's high-speed Precision
Edge™ 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.
APPLICATIONS
s Processor clock distribution/translation
s SONET clock distribution/translation
s Fibre Channel clock distribution/translation
s Gigabit Ethernet clock distribution/translation
s Single-ended ASIC-to-differential communication
IC signal translation
FUNCTIONAL BLOCK DIAGRAM
SEL
IN1
(LVTTL/CMOS)
IN2
(LVTTL/CMOS)
EN
2 Single-Ended
Clock/Data Inputs
1
MUX
0
DQ
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
4 Differential
LVPECL Outputs
Precision Edge is a trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
1
Rev.: C Amendment: /0
Issue Date: February 2003