PI6C49X0208 High Performance 1:8 Multi-Voltage CMOS Buffer Features Applications 8 single-ended outputs Fanout Buffer Networking systems including switches and Routers Up to 200MHz output frequency High frequency backplane based computing and telecom Ultra low output additive jitter = 0.01ps (typ.) platforms Selectable reference inputs support Xtal (10~50MHz), single- ended and differential Description Low output skew ~ 50ps (typ.) The PI6C49X0208 is a high performance multi-voltage 8-outputs 2.5V / 3.3V operation CMOS Fanout Buffer with internal Crystal Oscillator. The XTAL User configurable output VDDO in different banks: range is from 10MHz to 50MHz. The device has a wide range of Mixed 3.3V core, 2.5V, 1.8V or 1.5V output operating operating voltages of 2.5V and 3.3V. The device also provides user supply selectable output VDD option, which provides excellent flexibilities Mixed 2.5V core, 1.8V, 1.5V or 1.2V output operating to users. This device is ideal for systems that need to distribute low supply jitter clock signals to multiple destinations. Industrial temperature range: 40C to +85C Packaging (Pb-free & Green available): 32-pin TQFN (ZH) Pin Configuration Block Diagram IN SEL0 IN SEL1 ENABLE VDDO 1 24 CLK7 CLK0 Sync 2 23 V XIN V DDO DDO Crystal 3 22 CLK6 CLK1 Oscillator 4 21 GNDO GNDO XOUT 8 Clock Input 5 20 CLK5 CLK0~7 CLK2 Control Circuit 6 19 VDDO VDDO IN0 7 18 IN0 CLK3 CLK4 8 17 NC NC IN1 IN1 *IN0 can be single end ref clock0 and IN0 internal bias as Vdd/2 *IN1 can be single end ref clock1 and IN1 internal bias as Vdd/2 *IN-SEL 0:1 select XTAL, IN1/1 and IN0/0 input PI6C49X0208 Rev A 01/08/13 12-0308 1 9 32 GNDO GNDO 31 10 V ENABLE DD 30 11 XIN IN SEL0 12 29 XOUT IN SEL1 28 13 IN0 IN1 27 14 IN0 IN1 15 26 GND GND 25 16 GNDO GNDOPI6C49X0208 High Performance 1:8 Multi-Voltage CMOS Buffer Pin Description Pin Pin Name Type Description 1, 3, 5, 7, 18, CLK0~7 Clock Outputs Output 20, 22, 24 2, 6, 19, 23 V Output Power Supplier DDO Power 4, 9, 16, 21, 25, GNDO Power Core Ground 32 8, 17 NC - No Connect 15, 26 GND Power Output Ground 10 V Core Power Supplier DD Power 11 XIN Crystal interface Input 12 XOUT Crystal interface Output 13 IN0 Pull-down Diff or Single End Input Pull-up/ Pull- When IN0 is single end IN0 internal bias 14 IN0 Input down as Vdd/2 Pull-up/ Pull- When IN1 is single end IN1 internal bias 27 IN1 Input down as Vdd/2 28 IN1 Pull-down REF1 Diff or Single End Input IN-SEL 0:1 select XTAL, IN1/1 and IN0/ 30, 29 IN SEL 0:1 Input Pull-down IN0 input Synchronous active high Output Enable, 31 ENABLE Input LVCMOS/TTL Input Mode Selection Logic IN SEL0 IN SEL1 Selected Input 1 1 XTAL 0 1 XTAL 1 0 IN1/1 Diff or Single End 0 0 IN0/0 Diff or Single End Input/Output Operation State Input State Output State IN 0:1 , IN 0:1 open Logic Low IN 0:1 , IN 0:1 both to ground Logic Low IN 0:1 =High, IN 0:1 =Low Logic High IN 0:1 =Low, IN 0:1 =High Logic Low Output Mode Selection ENABLE Output CLK0~7 GND High-impedance VDD Enabled PI6C49X0208 Rev A 01/08/13 12-0308 2