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72T3645 - Block Diagram


1K x 36 TeraSync FIFO, 2.5V

The 72T3645 is a 1K x 36 TeraSync 2.5V FIFO memory with clocked read and write controls and a flexible Bus-Matching x36/x18/x9 data flow. TeraSync FIFOs are particularly appropriate for network, video, telecommunications, data communications and other applications that need to buffer large amounts of data and match busses of unequal sizes. There are two possible timing modes of operation with these devices: IDT Standard mode and First Word Fall Through mode.


  • User selectable HSTL/LVTTL Input and/or Output
  • 2.5V LVTTL or 1.8V, 1.5V HSTL Port Selectable Input/Ouput voltage
  • 3.3V Input tolerant
  • Program programmable flags by either serial or parallel means
  • Big-Endian/Little-Endian user selectable byte representation
  • Auto power down minimizes standby power consumption
  • Master Reset clears entire FIFO
  • Partial Reset clears data, but retains programmable settings
  • Empty, Full and Half-Full flags signal FIFO status
  • Output enable puts data outputs into high impedance state
  • JTAG port, provided for Boundary Scan function
  • Available in 208-pin and 240-pin PBGA packages
  • Easily expandable in depth and width
  • Independent Read and Write Clocks (permit reading and writing simultaneously)
  • Industrial temperature range (–40C to +85C) is available

Product Specification

Core Voltage (V)Bus Width (bits)Density (Kb)Pkg. CodeInterfaceI/O TypeI/O Frequency (MHz)Cycle Time (ns)OrganizationTemp. RangeArchitectureAccess Time (ns)
2.53636BB208, BBG208Synchronous1.5 V HSTL, 2.5 V LVTTL, 3.3 V LVTTL150.00, 200.00, 225.001K x 36-40 to 85°C, 0 to 70°CUni-directional

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
72T3645L4-4BBObsoleteBB208PBGA208CNoTrayCheck Availability
72T3645L4-4BBGObsoleteBBG208PBGA208CYesTrayCheck Availability
72T3645L5BBObsoleteBB208PBGA208CNoTrayCheck Availability
72T3645L5BBIObsoleteBB208PBGA208INoTrayCheck Availability
72T3645L6-7BBObsoleteBB208PBGA208CNoTrayCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
72T3645-72T36125 Datasheet Datasheet PDF 484 KB Feb 4, 2009
Apps Notes & White Papers
AN-360V:Verilog code ex. for Xilinx ApNote XAPP628 Application Note TXT 14 KB Jul 31, 2006
PDN# : FS-15-02R1 PRODUCT DISCONTINUANCE NOTCE Product Discontinuation Notice PDF 546 KB Jul 23, 2015
PDN# : FS-15-02 Product Discontinuance Notice Product Discontinuation Notice PDF 548 KB May 21, 2015
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
show all (9)
PCN#: TB-0512-01 Reel Color Changed from Blue to Black Product Change Notice PDF 729 KB Dec 16, 2005
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 14, 2004
PCN#: A-0403-03, BGA package family Product Change Notice PDF 38 KB Dec 9, 2004
PCN#: A-0309-05, new m/c-G770 & d/a-2300 material Product Change Notice PDF 211 KB Oct 16, 2003
PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 10, 2003
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 2001

Software & Tools

Title Type Format File Size Datesort icon
72T3645 IBIS Model - IBIS ZIP 27 KB Jan 16, 2003