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72825 - Block Diagram


1K x 18 DualSync FIFO, 5.0V

The 72825 is a 1K x 18 First-In, First-Out memory with clocked read and write controls. It is functionally equivalent to two 72225 FIFOs in a single package with all associated control, data, and flag lines assigned to independent pins and would be applicable for a wide variety of data buffering needs, such as optical disk controllers, Local Area Networks (LANs), and interprocessor communication. Each of the two FIFOs has an 18-bit input and output port. The Read Clock can be tied to the Write Clock for single clock operation or the two clocks can run asynchronous of one another for dual-clock operation.


  • Ideal for the following applications:
  • Network switching
  • Two level prioritization of parallel data
  • Bidirectional data transfer
  • Bus matching between 18 bit and 36 bit data paths
  • Width expansion to 36 bit per package
  • Depth expansion to 8,192 words per package
  • 10ns read/write cycle time, 6.5ns access time
  • IDT Standard or First Word Fall Through timing
  • Single or double register buffered Empty and Full Flags
  • Easily expandable in depth and width
  • Asynchronous or coincident Read and Write clocks
  • Async or sync programmable Almost Empty and Almost Full flags with default settings
  •  Half
  • Full flag capability
  • Available in 128-pin TQFP and 121 PBGA packages
  • Industrial temperature range (–40C to +85C) is available

Product Specification

Core Voltage (V)Bus Width (bits)Density (Kb)Pkg. CodeInterface
51818PK128, PKG128, BG121, BGG121Synchronous

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
72825LB10PFActivePK128TQFP128CNoTrayCheck Availability
72825LB10PF8ActivePK128TQFP128CNoReelCheck Availability
72825LB10PFGActivePKG128TQFP128CYesTrayCheck Availability
72825LB10PFG8ActivePKG128TQFP128CYesReelCheck Availability
72825LB15BGActiveBG121PBGA121CNoTrayCheck Availability
72825LB15BG8ActiveBG121PBGA121CNoReelCheck Availability
72825LB15BGGActiveBGG121PBGA121CYesTrayCheck Availability
72825LB15PFActivePK128TQFP128CNoTrayCheck Availability
72825LB15PF8ActivePK128TQFP128CNoReelCheck Availability
72825LB15PFGIPreviewPKG128TQFP128IYesTrayCheck Availability
72825LB15PFGI8PreviewPKG128TQFP128IYesReelCheck Availability
72825LB15PFIPreviewPK128TQFP128INoTrayCheck Availability
72825LB15PFI8PreviewPK128TQFP128INoReelCheck Availability
72825LB25BGActiveBG121PBGA121CNoTrayCheck Availability
72825LB25BG8ActiveBG121PBGA121CNoReelCheck Availability
72825LB25PFActivePK128TQFP128CNoTrayCheck Availability
72825LB25PF8ActivePK128TQFP128CNoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
72805-72845 Datasheet Datasheet PDF 259 KB May 23, 2016
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China Product Change Notice PDF 164 KB May 10, 2006
PCN#: TB-0512-01 Reel Color Changed from Blue to Black Product Change Notice PDF 729 KB Dec 16, 2005
show all (17)
PCN A-0506-03; Packing Material Change Product Change Notice PDF 290 KB Jul 19, 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#G-0302-05, New mold compound EME-G700 series Product Change Notice PDF 65 KB Mar 20, 2003
PCN#: G-0302-06, New die attach 3230 from Ablestik Product Change Notice PDF 150 KB Mar 20, 2003
PCN# F0202-04R1: Wafer Fabrication Site Change Product Change Notice PDF 50 KB Jun 1, 2002
PCN# G-0110-06 REV.1 Mold Compound Product Change Notice PDF 48 KB Apr 26, 2002
PCN# F-0203-04: Auto Mold Process Product Change Notice PDF 37 KB Mar 19, 2002
PCN# G-0110-06 Mold Compound Product Change Notice PDF 47 KB Dec 14, 2001
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 2001
PCN# G0003-03, Shipping changed (tray to tube) Product Change Notice PDF 20 KB Mar 20, 2000
PCN# G9911-05, To qualify low alpha mold compound. Product Change Notice PDF 44 KB Nov 18, 1999

Software & Tools

Title Type Format File Size Datesort icon
72825 HSPICE Model - HSPICE application/x-tar 32 KB Jun 29, 1999
72825 IBIS Model - IBIS ZIP 11 KB Jan 22, 1999