The 85357-11 is a 4:1 or 2:1, Crystal Oscillator-to-3.3V LVPECL / ECL Multiplexer . The 85357-11 has 4 selectable crystal inputs. The device can support 10MHz to 27MHz 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).


  • One differential 3.3V LVPECL output
  • 4:1 or 2:1 Crystal Oscillator Multiplexer
  • Supports parallel resonant crystals with a frequency range of 10MHz to 27MHz. The oscillator circuit is optimized for parallel resonant mode, and will require external capacitance
  • Maximum output frequency: 27MHz
  • LVCMOS/LVTTL SEL0 and SEL1 inputs have internal pulldown resistors
  • 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
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Package Buy Sample
85357AG-11LF Obsolete TSSOP 20 C Yes Tube Package Info
85357AG-11LFT Obsolete TSSOP 20 C Yes Reel Package Info

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
PCN# N0612-02 Datasheet Change Datasheet Change Notice PDF 12 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PDN# : CQ-15-01 (R1) Quarter PDN for Declined Market Product Discontinuation Notice PDF 550 KB
PDN# : CQ-15-01 Quarter PDN for Declined Market Product Discontinuation Notice PDF 547 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB