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PDF SY58021U Data sheet ( Hoja de datos )
| Número de pieza | SY58021U | |
| Descripción | FANOUT BUFFER/ TRANSLATOR | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SY58021U (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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Micrel, Inc.
4GHz, 1:4 LVPECL FANOUT
BUFFER/ TRANSLATOR
WITH INTERNAL TERMINATION
Precision Edge®
Precision ESdY5g8e0®21U
SY58021U
FEATURES
Precision 1:4, LVPECL fanout buffer
Guaranteed AC performance over temperature/
voltage:
• >4GHz fMAX (clock)
• <100ps tr / tf Times
• <300ps tpd
• <15ps max skew
Low jitter performance
• <10pspp total jitter (clock)
• <1psrms random jitter (data)
• <10pspp deterministic jitter (data)
Accepts an input signal as low as 100mV
Unique input termination and VT pin accepts
DC-coupled and AC-coupled differential inputs:
LVPECL, LVDS, and CML
100k LVPECL compatible 800mV swing output
Power supply 2.5V ±5% and 3.3V ±10%
–40°C to +85°C temperature range
Available in 16-pin (3mm × 3mm) MLF™ package
APPLICATIONS
s All SONET and All GigE clock distribution
s Fibre Channel clock and data distribution
s Backplane distribution
s High-end, low skew, multiprocessor synchronous
clock distribution
FUNCTIONAL BLOCK DIAGRAM
Precision Edge®
DESCRIPTION
The SY58021U is a 2.5V/3.3V precision, high-speed, fully
differential 1:4 LVPECL fanout buffer. Optimized to provide
four identical output copies with less than 15ps of skew and
less than 10pspp total jitter, the SY58021U can process
clock signals as fast as 4GHz.
The differential input includes Micrel’s unique, 3-pin input
termination architecture interfaces to differential LVPECL,
CML, and LVDS signals (AC- or DC-coupled) as small as
100mV without any level-shifting or termination resistor
networks in the signal path. For AC-coupled input interface
applications, an on-board output reference voltage (VREF-
AC) is provided to bias the VT pin. The outputs are 100k
LVPECL compatible, with extremely fast rise/fall times
guaranteed to be less than 100ps.
The SY58021U operates from a 2.5V ±5% supply or
3.3V ±10% supply and is guaranteed over the full industrial
temperature range (–40°C to +85°C). For applications that
require faster rise/fall times, or greater bandwidth, consider
the SY58022U 1:4 fanout buffer with 400mV LVPECL output
swing, or the SY58020U 1:4 CML fanout buffer. The
SY58021U is part of Micrel’s high-speed, Precision Edge®
product line.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
TYPICAL PERFORMANCE
IN
50Ω
VT
50Ω
/IN
VREF-AC
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
Precision Edge is a registered trademark of Micrel , Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
M9999-062405
[email protected] or (408) 955-1690
1
1.25GHz Output
TIME (100ps/div.)
Rev.: D Amendment: /0
Issue Date: June 2005
1 page  
Micrel, Inc.
TYPCIAL OPERATING CHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 100mV, TA = 25°C, unless otherwise stated.
Amplitude
vs. Frequency
900
800
700
600
500
400
300
200
100
0
FREQUENCY (MHz)
Propagation Delay vs.
Input Voltage Swing
194
192
190
188
186
184
182
180
178
176
174
0 200 400 600 800 1000 1200
INPUT VOLTAGE SWING (mV)
Skew
vs. Temperature
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
Precision Edge®
SY58021U
Propagation Delay vs.
Temperature
184
183
182
181
180
179
178
177
176
-60 -40 -20 0 20 40 60 80 100
TEMPERATURE (°C)
M9999-062405
[email protected] or (408) 955-1690
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet SY58021U.PDF ] | |
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