ICS85357-11 Datasheet | ICST

.. Integrated Circuit Systems, Inc. 4:1 OR 2:1, CRYSTAL OSCILLATOR-TO-3.3V LVPECL / ECL MULTIPLEXER Features - 1 differential 3.3V LVPECL output - 4:1 or 2:1 Crystal Oscillator Multiplexer - Supports parallel resonant crystals with a frequency range of 10MHz - 25MHz. The oscillator circuit is optimized for parallel resonant mode, and will require external capacitance - Maximum output frequency up to 25MHz - LVCMOS SEL0 and SEL1 inputs have internal pulldown resistors - Part-to-part skew: 150ps (maximum) - Propagation delay: 2ns (maximum) - LVPECL mode operating voltage supply range: VCC = 3.135V to 3.465V, VEE = 0V - ECL mode operating voltage supply range: VCC = 0V, VEE = -3.135V to -3.465V - 0°C to 70°C ambient operating temperature - Industrial temperature information available upon request GENERAL DESCRIPTION The ICS85357-11 is a 4:1 or 2:1, Crystal Oscillator-to-3.3V LVPECL / ECL Multiplexer and Hi Per Clock S™ is a member of the Hi Per Clock S™ family of High Performance Clock Solutions from ICS. The ICS85357-11 has 4 selectable crystal inputs. The device can support 10MHz - 25MHz parallel resonant crystals by connecting external capacitors between XTALIN/XTALOUT and ground. The select pins have internal pulldown resistors and leaving one input unconnected (pulled to logic low by the internal resistor) will transform the device into a 2:1 multiplexer. The SEL1 lead is the most significant line and the binary number applied to the select pins will select the same numbered data input (i.e., 00 selects XTALIN0/XTALOUT0). ,&6 BLOCK DIAGRAM PIN ASSIGNMENT VCC XTALIN0 XTALOUT0 XTALIN1 XTALOUT1 XTALIN2 XTALOUT2 XTALIN3 XTALOUT3 VEE 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC SEL1 SEL0 VCC Q0 n Q0 VCC nc nc VEE XTALIN0 OSC XTALOUT0 XTALIN1 OSC XTALOUT1 XTALIN2 OSC XTALOUT2 XTALIN3 OSC XTALOUT3 SEL1 SEL0 11 10 01 Q0 n Q0 00 20-Lead TSSOP 4.40mm x 6.50mm x 0.92mm body package G Package Top View 85357AG-11 .icst....