PDF SY89546U Data sheet ( Hoja de datos )

Número de pieza	SY89546U
Descripción	3.2Gbps DIFFERENTIAL 4:1 LVDS MULTIPLEXER
Fabricantes	Micrel Semiconductor
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No Preview Available ! www.DataSheet.co.kr Micrel, Inc. 2.5V, 3.2Gbps DIFFERENTIAL 4:1 LVDS MULTIPLEXER WITH 1:2 FANOUT AND INTERNAL TERMINATION Precision Edge® Precision ESdY8g9e5®46U SY89546U FEATURES Selects among four differential inputs Provides two copies of the selected input Guaranteed AC performance over temp and voltage: • DC-to > 3.2Gbps data rate throughput • < 620ps In-to-Out tpd • < 150ps tr/tf Unique input isolation design minimizes crosstalk Ultra-low jitter design: • < 1psRMS random jitter • < 10psPP deterministic jitter • < 10psPP total jitter (clock) • < 0.7psRMS crosstalk-induced jitter Internal input termination Unique input termination and VT pin accepts DC- coupled and AC-coupled inputs (LVDS, LVPECL, CML) 350mV LVDS output swing Power supply 2.5V ±5% –40°C to +85°C temperature range Available in 32-pin (5mm x 5mm) MLF® package APPLICATIONS SONET/SDH multi-channel select applications Fibre Channel applications GigE applications TYPICAL PERFORMANCE Output Amplitude vs. Frequency 400 350 300 250 200 150 100 50 00 1000 2000 3000 4000 5000 6000 FREQUENCY (MHz) Precision Edge® DESCRIPTION The SY89546U is a precision, high-speed 4:1 differential multiplexer that provides two copies of the selected input. The high speed LVDS (350mV) compatible outputs with a guaranteed throughput of up to 3.2Gbps over temperature and voltage. The SY89546U differential inputs include Micrel’s unique, 3-pin 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, both AC- and DC-coupled without external resistor-bias and termination networks. The result is a clean, stub-free, low jitter interface solution. The SY89546U operates from a single 2.5V supply, and is guaranteed over the full industrial temperature range (–40°C to +85°C). For applications that require a 3.3V supply, consider the SY89547L. Or, for applications that only require one differential output, consider the SY89544U or SY89545L. The SY89546U is part of Micrel’s Precision Edge® product family. All support documentation can be found on Micrel’s web site at www.micrel.com. FUNCTIONAL BLOCK DIAGRAM IN0 50Ω VT0 50Ω /IN0 IN1 50Ω VT1 50Ω /IN1 IN2 50Ω VT2 50Ω /IN2 IN3 50Ω VT3 50Ω /IN3 4:1 MUX 0 1:2 Fanout 1 MUX 2 S1 3 S0 Q0 /Q0 LVDS Q1 /Q1 Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-082407 [email protected] or (408) 955-1690 1 SEL0 (CMOS/TTL) SEL1 (CMOS/TTL) Rev.: C Amendment: /0 Issue Date: August 2007 Datasheet pdf - http://www.DataSheet4U.net/ 1 page www.DataSheet.co.kr Micrel, Inc. Precision Edge® SY89546U AC ELECTRICAL CHARACTERISTICS(10) VCC = 2.5V ±5%; TA = –40°C to +85°C; RL = 100ý across Q and /Q, unless otherwise stated. Symbol Parameter Condition fMAX tpd Maximum Operating Frequency Differential Propagation Delay VOUT ž 200mV IN-to-Q SEL-to-Q NRZ Data Clock tSKEW Input-to-Input Skew Note 11 Output-to-Output Skew Note 12 Part-to-Part Skew Note 13 tJITTER Data Random Jitter (RJ) Note 14 Deterministic Jitter (DJ) Note 15 Clock Total Jitter (TJ) Note 16 Cycle-to-Cycle Jitter Note 17 Crosstalk Crosstalk-Induced Jitter Note 18 tr, tf Output Rise / Fall Time (20% to 80%) At full output swing Min Typ Max Units 3.2 Gbps 4 GHz 330 430 530 ps 200 400 700 ps 4 20 ps 8 20 ps 200 ps 1 psRMS 10 psPP 10 psPP 1 psRMS 0.7 psRMS 35 80 150 ps Notes: 10. Measured with 100mV input swing. See “Timing Diagrams” section for definition of parameters. High frequency AC parameters are guaranteed by design and characterization. 11. Input-to-input skew is the difference in time from an input-to-output in comparison to any other input-to-output. In addition, the input-to-input skew does not include the output skew. 12. Output-to-output skew is measured between two different outputs under identical input transitions. 13. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective inputs. Total skew is calculated as the RMS (Root Mean Square) of the input skew and output skew. 14. Random jitter is measured with a K28.7 comma detect character pattern, measured at 1.25Gbps and 3.2Gbps. 15. Deterministic jitter is measured at 1.25Gbps and 3.2Gbps, with both K28.5 and 223–1 PRBS pattern. 16. Total jitter definition: with an ideal clock input of frequency - fMAX, no more than one output edge in 1012 output edges will deviate by more than the specified peak-to-peak jitter value. 17. Cycle-to-cycle jitter definition: the variation of periods between adjacent cycles, Tn-Tn-1 where T is the time between rising edges of the output signal. 18. Crosstalk is measured at the output while applying two similar clock frequencies to adjacent inputs that are asynchronous with respect to each other at the inputs. M9999-082407 [email protected] or (408) 955-1690 5 Datasheet pdf - http://www.DataSheet4U.net/ 5 Page

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