PI6C20800B PI6C4911504-01 High Performance LVPECL Fanout Buffer Features Description 4 LVPECL outputs e PTh I6C4911504-01 is a high performance fanout buffer device which supports up to 1.5GHz frequency. This device is ideal for Up to 1.5GHz output frequency systems that need to distribute low jitter clock signals to mul- Ultra low additive phase jitter: < 0.04 ps (typ) tiple destinations. Two selectable inputs Low delay from input to output (Tpd typ. < 1.0ns) Applications 2.5V / 3.3V power supply Networking systems including switches and Routers Industrial temperature support High frequency backplane based computing and telecom TSSOP-20 package platforms Block Diagram Pin Configuration (20-Pin TSSOP) Pullup SYNC OE D GND 20 1 Q0+ Q LE Q0+ SYNC OE 19 Q0- 2 Q0- Pulldown IN SEL 18 3 V REF IN0+ DD Pullup 0 REF IN0- Q1+ REF IN0+ 4 17 Q1+ Q1- Pulldown REF IN1+ 1 Pullup REF IN1- 16 Q1- REF IN0- 5 Q2+ 15 REF IN1+ 6 Q2+ Q2- Pulldown IN SEL 14 REF IN1- 7 Q2- Q3+ Q3- 13 nc 8 V DD 12 nc 9 Q3+ 11 V 10 Q3- DD www.pericom.com PI6C4911504-01 Rev A 2/27/15 15-0027 1PI6C4911504-01 High Performance LVPECL Fanout Buffer Pinout Table Pin Pin Name Type Description 1 GND Power Ground Synchronous clock enable. When High, clock 2 SYNC OE Input Pullup outputs follow REF IN. When low, Q+ outputs are forced low, Q- are forced high 3 IN SEL Input Pulldown Clock input source selection pin REF IN0+ Pulldown 4, 5 Input Differential clock input 0 REF IN0- Pullup REF IN1+ Pulldown 6, 7 Input Differential clock input 1 REF IN1- Pullup 8, 9 NC - No connect 10, 13, 18 V Power Power supply DD Q3+ 11, 12 Output LVPECL output clock 3 Q3- Q2+ 14, 15 Output LVPECL output clock 2 Q2- Q1+ 16, 17 Output LVPECL output clock 1 Q1- Q0+ 19, 20 Output LVPECL output clock 0 Q0- Function Table Table 1: Clock source input select function IN SEL Function 0 REF IN0 is the selected reference input 1 REF IN1 is the selected reference input Table 2: SYNC OE select function SYNC OE Function 0 All outputs disabled. Q+ disabled low, Q- disabled High. 1 All outputs enabled. Pin Characteristics Symbol Parameter Min Typ Max Units R Input Pullup Resistor 50 k PULLUP R Input Pulldown Resistor 75 k PULLDOWN www.pericom.com PI6C4911504-01 Rev A 2/27/15 15-0027 2