PI6C4911504-03 High Performance LVPECL Fanout Buffer Features Description ÎÎ4 LVPECL outputs The PI6C4911504-03 is a high performance fanout buffer device which supports up to 1.5GHz frequency. PI6C4911504-03 features selectable single-ended clock or crystal inputs and translates to four LVPECL outputs. The outputs are synchronized with input clock during asynchronous assertion /deassertion of CLK_EN pin. PI6C4911504-03 is ideal for crystal or LVCMOS/ LVTTL to LVPECL translation. Typical clock translation and distribution applications are data-communications and telecommunications.This device is ideal for systems that need to distribute low jitter clock signals to multiple destinations. ÎÎUp to 1.5GHz output frequency ÎÎUltra low additive phase jitter: < 0.03 ps (typ) (differential 156.25MHz, 12KHz to 20MHz integration range) ÎÎTwo selectable inputs ÎÎLow delay from input to output (Tpd typ. 1.5ns) ÎÎ2.5V / 3.3V power supply ÎÎIndustrial temperature support ÎÎTSSOP-20 package Applications ÎÎNetworking systems including switches and Routers ÎÎHigh frequency backplane based computing and telecom platforms Pin Configuration (20-Pin TSSOP) Block Diagram 1 20 Q0 CLK_EN 2 19 NQ0 CLK_SEL 3 18 VCC CLK 4 17 Q1 NC 5 16 NQ1 Xtal1 6 15 Q2 Xtal2 7 14 NQ2 NC 8 13 VCC NC 9 12 Q3 VCC 10 11 NQ3 VEE 13-0104 1 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer Pinout Table Pin # Pin Name 1 VEE Power 2 CLK_EN Input Pullup Clock output enable/ disable 3 CLK_SEL Input Pulldown Clock input source selection pin 4 CLK Input Pulldown Clock input 5 NC - No Connect 6 XTAL1 Input Xtal input 7 XTAL2 Output Xtal output 8, 9 NC - No connect 10, 13, 18 VCC Power Power supply Output LVPECL output clock Output LVPECL output clock Output LVPECL output clock nQ3 11, 12 Q3 nQ2 14, 15 Q2 nQ1 16, 17 Q1 Type Description Negative power supply nQ0 19, 20 Output Q0 Note: Pullup and Pulldown are for internal input resistors LVPECL output clock Function Table Table 1: Clock source input select function CLK_SEL Function 0 CLK is the selected reference input 1 XTAL is the selected input Table 2: Clock output select function CLK_EN Function 0 All outputs disabled. Qx disabled low, nQx disabled High. 1 All outputs enabled. 13-0104 2 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested) Storage temperature....................................................-55 to +150ºC Supply Voltage to Ground Potential (VCC).......... -0.5 to +4.65V Inputs (Referenced to GND)............................... -0.5 to Vcc+0.5V Clock Output (Referenced to GND).................. -0.5 to Vcc+0.5V Soldering Temperature (Max of 10 seconds).....................+260ºC Latch up...................................................................................200mA Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Power Supply Characteristics and Operating Conditions Symbol Parameter VCC Supply Voltage IDD Power Supply Current TA Ambient Operating Temperature 13-0104 Test Condition Min. Typ. Max. Units 3.135 3.465 V 2.375 2.625 V 130 mA 85 °C All outputs unloaded -40 3 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer DC Electrical Specifications - LVCMOS Inputs Symbol Parameter Conditions Min. VIH Input high voltage VCC=3.3V VIL Input low voltage VIH VIL Typ. Max. Units 2.0 VCC+0.3 V VCC=3.3V -0.3 0.8 V Input high voltage VCC=2.5V 1.7 VCC+0.3 V Input low voltage VCC=2.5V -0.3 0.7 V CLK, CLK_SEL 150 uA CLK_EN 10 uA Input High current IIH CLK, CLK_SEL -10 uA CLK_EN -150 uA Input Low current IIL CIN Input capacitance 4 pF R PULLUP/ Input pullup and pulldown resistor 50 kΩ PULLDOWN DC Electrical Specifications- LVPECL Outputs Parameter Description Output High voltage VOH Conditions Min. Typ. Max. VCC=3.3V 2.1 2.6 VCC=2.5V 1.3 1.75 VCC=3.3V 1.0 1.8 VCC=2.5V 0.4 0.8 13-0104 V V Output Low voltage VOL Units 4 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer AC Electrical Specifications – Differential Outputs Parameter Description Conditions Min. Typ. FOUT Clock output frequency LVPECL Tr Output rise time From 20% to 80% 150 ps Tf Output fall time From 80% to 20% 150 ps TODC Output duty cycle VPP Output swing Single-ended Tj Buffer additive jitter RMS TSK Output Skew TPD Propagation Delay TOD Valid to HiZ 200 ns TOE HiZ to valid 200 ns 48 LVPECL outputs Max. Units 1500 MHz 52 400 4 outputs devices, outputs in same bank, with same load, at DUT. % mV 0.03 ps 25 ps 1500 ps Notes: All parameters are measured with CMOS input of 266MHz unless stated otherwise 13-0104 5 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer Crystal Characteristics Parameters Test Conditions Min. Max. Units 50 MHz Equivalent Series Resistance (ESR) 50 Ω Shunt Capacitance 7 pF Drive Level 1 mW Mode of Oscillation Fundamental Frequency 13-0104 Typ. 12 6 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer Output Skew Propagation Delay Output Skew TSK Propagation Delay TPD VOH CLK CLK TPLH TPHL Qn VOH TPLHx TPHLx Qn TSK TSK TF VOH VOL VOL TR VOL Qn+1 VOH VOL TPLHy TPHLy TSK = TPLHy - TPLHx or TSK = TPHLy - TPHLx TSK = TPLH2 - TPLH1 or TSK = TPHL2 - TPHL1 13-0104 7 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer Configuration Test Load Board Termination for LVPECL 13-0104 8 PI6C4911504-03 Rev. B 06/24/2013 PI6C4911504-03 High Performance LVPECL Fanout Buffer Packaging Mechanical: 20-Contact TSSOP (L) DATE: 05/03/12 DESCRIPTION: 20-pin, 173mil Wide TSSOP Notes: 1. Refer JEDEC MO-153F/AC 2. Controlling dimensions in millimeters 3. Package outline exclusive of mold flash and metal burr PACKAGE CODE: L DOCUMENT CONTROL #: PD-1311 REVISION: F 12-0373 Ordering Information Ordering Number Package Code Package Description PI6C4911504-03LIE L Pb-free & Green 20-Contact TSSOP • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free and Green • X suffix = Tape/Reel 13-0104 9 PI6C4911504-03 Rev. B 06/24/2013