1-to-12, Differential HCSL Fanout Buffer 8V31012 DATA SHEET General Description Features The 8V31012 is a 1-to-12 Differential HCSL Fanout Buffer. The Twelve differential HCSL outputs 8V31012 is designed to translate any differential signal levels to Translates any differential input signal (LVPECL, LVHSTL, LVDS, differential HCSL output levels. An external reference resistor is HCSL) to HCSL levels without external bias networks used to set the value of the current supplied to an external Maximum output frequency: 250MHz load/termination resistor. The load resistor value is chosen to equal Output skew: 265ps (typical) the value of the characteristic line impedance of 50 . The 8V31012 V 850mV (maximum) is characterized at an operating supply voltage of 3.3V. : OH Full 3.3V supply voltage The differential HCSL outputs, accurate crossover voltage and duty cycle make the 8V31012 ideal for interfacing to PCI Express and Available in lead-free (RoHS 6) package FBDIMM applications. -40C to 85C ambient operating temperature Block Diagram Pin Assignment CLK nCLK 48 47 46 45 44 43 42 41 40 39 38 37 Q0 Q6 1 36 Q0 V DD nQ0 nQ6 2 35 nQ9 nQ0 34 3 V Q9 DD Q7 Q1 33 4 GND nQ7 nQ1 Q1 5 32 nQ8 nQ1 Q2 Q8 31 6 Q8 GND nQ2 nQ8 8V31012 7 30 V Q2 DD 8 29 nQ7 nQ2 Q3 Q9 28 nQ9 nQ3 9 V Q7 DD 27 10 Q3 V DD Q10 Q4 11 26 nQ3 nQ6 nQ10 nQ4 25 12 V Q6 DD 13 14 15 16 17 18 19 20 21 22 23 24 Q11 Q5 nQ11 nQ5 IREF 48-pin,7mmx7mmVFQFNPackage 8V31012 REVISION 1 10/21/15 1 2015 Integrated Device Technology, Inc. GND V DD IREF nc nQ11 Q4 nQ4 Q11 V V DD DD Q5 nQ10 nQ5 Q10 V nc DD V V DD DD nc nCLK V CLK DD GND GND8V31012 DATA SHEET Pin Description and Pin Characteristic Tables Table 1. Pin Descriptions Number Name Type Description 1 Q0 Output Differential output pair. Differential HCSL interface levels. 2 nQ0 Output Differential output pair. Differential HCSL interface levels. 3V Power Power supply pin. DD 4 Q1 Output Differential output pair. Differential HCSL interface levels. 5 nQ1 Output Differential output pair. Differential HCSL interface levels. 6GND Power Power supply ground. 7 Q2 Output Differential output pair. Differential HCSL interface levels. 8 nQ2 Output Differential output pair. Differential HCSL interface levels. 9V Power Power supply pin. DD 10 Q3 Output Differential output pair. Differential HCSL interface levels. 11 nQ3 Output Differential output pair. Differential HCSL interface levels. 12 V Power Power supply pin. DD 13 GND Power Power supply ground. External fixed precision resistor (950) from this pin to ground provides a reference current 14 IREF Input used for differential current-mode Qx, nQx clock outputs. 15 Q4 Output Differential output pair. Differential HCSL interface levels. 16 nQ4 Output Differential output pair. Differential HCSL interface levels. 17 V Power Power supply pin. DD 18 Q5 Output Differential output pair. Differential HCSL interface levels. 19 nQ5 Output Differential output pair. Differential HCSL interface levels. 20 V Power Power supply pin. DD 21 V Power Power supply pin. DD 22 nc unused No connect. 23 V Power Power supply pin. DD 24 GND Power Power supply ground. 25 Q6 Output Differential output pair. Differential HCSL interface levels. 26 nQ6 Output Differential output pair. Differential HCSL interface levels. 27 V Power Power supply pin. DD 28 Q7 Output Differential output pair. Differential HCSL interface levels. 29 nQ7 Output Differential output pair. Differential HCSL interface levels. 30 V Power Power supply pin. DD 1-TO-12, DIFFERENTIAL HCSL FANOUT BUFFER 2 REVISION 1 10/21/15