Precision Edge ULTRA-PRECISION 1:8 FANOUT Micrel, Inc. SY58033U Precision Edge bUFFER WITH 400mV LVPECL OUTPUTS SY58033U AND INTERNAL TERMINATION FEATURES Precision 1:8, 400mV LVPECL fanout buffer Low-jitter performance: Precision Edge 76fs phase jitter (typ) RMS DESCRIPTION Guaranteed AC performance over temperature and voltage: The SY58033U is a 2.5V/3.3V precision, high-speed, fully Clock frequency range: DC to 5.5GHz differential 400mV LVPECL 1:8 fanout buffer. The SY58033U <80ps t / t times is optimized to provide eight identical output copies with r f <280ps t less than 20ps of skew and only 76fs phase jitter. It can pd RMS <20ps skew process clock signals as fast as 5.5GHz. 100k LVPECL compatible outputs The differential input includes Micrels unique, 3-pin input termination architecture that allows the SY58033U to directly Fully differential inputs/outputs interface to LVPECL, CML, and LVDS differential signal Accepts an input signal as low as 100mV (AC- or DC-coupled) without any level-shifting or termination Unique input termination and V pin accepts T resistor networks in the signal path. The result is a clean, DC-coupled and AC-coupled differential inputs: stub-free, low-jitter solution. The LVPECL (100k temperature (LVPECL, LVDS, and CML) compensated) outputs feature a 400mV typical swing into Power supply 2.5V 5% or 3.3V 10% 50 ohms loads, and provide an extremely fast rise/fall time guaranteed to be less than 80ps. Industrial temperature range: 40C to +85C The SY58033U operates from a 2.5V 5% supply or Available in 32-pin (5mm x 5mm) QFN Package 3.3V 10% supply and is guaranteed over the full industrial temperature range (40C to +85C). Other high-speed 1:8 fanout buffers include the CML SY58031U and the 800mV LVPECL SY58032U. The SY58033U is part of Micrels high- speed, Precision Edge product line. All support documentation can be found on Micrels web site at www.micrel.com. APPLICATIONS FUNCTIONAL bLOCk DIAGRAM All SONET and all GigE clock distribution All Fibre Channel clock and data distribution Network routing engine timing distribution High-end, low-skew multiprocessor synchronous clock distribution United States Patent No. RE44,134 Precision Edge is a registered trademark of Micrel, Inc. Rev.: F Amendment: /0 M9999-072810 1 Issue Date: October 2011 hbwhelp micrel.com or (408) 955-1690 Precision Edge Micrel, Inc. SY58033U PACAGE/ORDERING INFORMAk TION (1) Ordering Information Package Operating Package Part Number Type Range Marking (3) SY58033UMG QFN-32 Industrial SY58033U with Pb-Free Pb-Free bar-line indicator (2, 3) SY58033UMGTR QFN-32 Industrial SY58033U with Pb-Free Pb-Free bar-line indicator Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC electricals only. A All devices are Pb-Free. 2. Tape and Reel. 3. Pb-Free package recommended for new designs. 32-Pin QFN (QFN-32) PIN DESCRIPTION Pin Number Pin Name Pin Function 3, 6 IN, /IN Differential Signal Input: Each pin of this pair internally terminates with 50 to the V pin. Note that this input will default to an indeterminate state if left open. T See Input Interface Applications section. 4 VT Input Termination Center-Tap: Each input terminates to this pin. The V pin provides a T center-tap for each input (IN, /IN) to the termination network for maximum interface flexibility. See Input Interface Applications section. 2, 7, 17, 24 GND, Ground. Exposed pad must be connected to a ground plane that is the same potential Exposed Pad as the ground pin. 1, 8, 9, 16, VCC Positive Power Supply: Bypass with 0.1F 0.01F low ESR capacitors as close to the 18, 23, 25, 32 pins as possible. 31, 30, 29, 28, 27, Q0, /Q0, Q1, /Q1, 400mV LVPECL Differential Output Pairs: Differential buffered output copy of the 26, 22, 21, 20, 19, Q2, /Q2, Q3, /Q3 input signal. The LVPECL output swing is typically 400mV into 50. Unused 15, 14, 13, 12, Q4, /Q4, Q5, /Q5, output pairs may be left floating with no impact on jitter. See LVPECL Output section. 11, 10 Q6, /Q6, Q7, /Q7 5 VREF-AC Bias Reference Voltage: Equal to V 1.2V (approx.), and used for AC-coupled CC applications. See Input Interface Applications section. When using V , bypass REF-AC with 0.01F capacitor to V . Maximum sink/source current is 0.5mA. CC M9999-072810 2 hbwhelp micrel.com or (408) 955-1690