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PDF SY89832U Data sheet ( Hoja de datos )
| Número de pieza | SY89832U | |
| Descripción | ULTRA-PRECISION 1:4 LVDS FANOUT BUFFER/TRANSLATOR | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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SY89832U
2.5V Ultra-Precision 1:4 LVDS Fanout
Buffer/Translator with Internal Termination
Precision Edge®
General Description
The SY89832U is a 2.5V, high-speed, 2GHz differential,
low voltage differential swing (LVDS) 1:4 fanout buffer
optimized for ultra-low skew applications. Within device
skew is guaranteed to be less than 20ps 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 SY89832U is a part of Micrel's high-speed clock
synchronization family. For 3.3V applications, see
SY89833L or SY89833AL. 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.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
Guaranteed AC performance over temperature and
voltage:
DC-to >2.0GHz throughput
<570ps propagation delay (IN-to-Q)
<20ps within-device skew
<200ps rise/fall time
Ultra-low jitter design:
81fsRMS phase jitter
Unique, patented input termination and VT pin accepts
DC- and AC-coupled inputs
High-speed LVDS outputs
2.5V voltage supply operation
Industrial temperature range: –40C to +85C
Available in a 16-pin (3mm × 3mm) QFN package
Applications
Processor clock distribution
SONET clock distribution
Fibre Channel clock distribution
Gigabit Ethernet clock distribution
Functional Block Diagram
Typical Performance
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 10, 2014
Revision 3.0
[email protected] or (408) 955-1690
1 page  
Micrel, Inc.
LVDS Outputs DC Electrical Characteristics(7)
VCC = 2.5V ±5%, RL = 100Ω across the outputs; TA = –40°C to +85°C.
Symbol Parameter
Condition
VOUT
VDIFF_OUT
Output Voltage Swing
Differential Output Voltage Swing
See Figure 4.
See Figure 5.
VOCM
∆ VOCM
Output Common Mode Voltage
Change in Common Mode Voltage
SY89832U
Min.
250
500
1.125
−50
Typ.
325
650
Max.
1.275
50
Units
mV
mV
V
mV
LVTTL/CMOS DC Electrical Characteristics(7)
VCC = 2.5V ±5%, TA = –40°C to +85°C.
Symbol Parameter
Condition
VIH Input HIGH Voltage
VIL Input LOW Voltage
IIH Input HIGH Current
IIL Input LOW Current
Min.
2.0
0
−125
−300
Typ.
Max.
VCC
0.8
30
Units
V
V
µA
µA
AC Electrical Characteristics(9)
VCC = 2.5V ±5% or 3.3V ±10%, RL = 100Ω across the outputs; TA = –40°C to +85°C unless otherwise stated.
Symbol Parameter
Condition
Min.
Typ.
Max.
Units
fMAX
tpd
tSKEW
Maximum Frequency
Propagation Delay
Within-Device Skew
Part-to-Part Skew
IN-to-Q
VOUT ≥ 200mV
VIN < 400mV
VIN ≥ 400mV
Note 10
Note 11
2.0 2.5
GHz
370
470 570
ps
300
410 500
ps
5 20 ps
200 ps
tS
tH
tJITTER
Set-Up Time
EN to IN, /IN Note 12
Hold Time
EN to IN, /IN Note 12
Additive Phase Jitter
Carrier = 622MHz
Integration Range: 12kHz – 20MHz
Carrier = 250MHz
Integration Range: 12kHz – 20MHz
300
500
81
195
ps
ps
fs
fs
Output Rise/Fall Times
tr, tf (20% to 80%)
At full output swing.
70
150 200
ps
Notes:
9. High-frequency AC parameters are guaranteed by design and characterization.
10. Within device skew is measured between two different outputs under identical input transitions.
11. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and no skew at the edges at the respective
inputs.
12. Set-up and hold times apply to synchronous applications that intend to enable/disable before the next clock cycle. For asynchronous applications,
set-up and hold times do not apply.
September 10, 2014
5 Revision 3.0
[email protected] or (408) 955-1690
5 Page 
Micrel, Inc.
Input Interface Applications
SY89832U
Figure 6. DC-Coupled CML
Input Interface
Figure 7. AC-Coupled CML
Input Interface
Figure 8. DC-Coupled LVPECL
Input Interface
(*Bypass with 0.01µF to GND)
Figure 9. AC-Coupled LVPECL
Input Interface
Figure 10. LVDS Input Interface
Figure 11. AC-Coupled LVDS
Input Interface
September 10, 2014
11 Revision 3.0
[email protected] or (408) 955-1690
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet SY89832U.PDF ] | |
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