256 x 18 DualSync FIFO, 5.0V

The 72805 is a 256 x 18 First-In, First-Out memory with clocked read and write controls. It is functionally equivalent to two 72205 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.

Features

  • 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 Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
72805LB10PF Active PK128 TQFP 128 C No Tray Availability
72805LB10PF8 Active PK128 TQFP 128 C No Reel Availability
72805LB15PF Active PK128 TQFP 128 C No Tray Availability
72805LB15PF8 Active PK128 TQFP 128 C No Reel Availability
72805LB15PFI Preview PK128 TQFP 128 I No Tray Availability
72805LB15PFI8 Preview PK128 TQFP 128 I No Reel Availability
72805LB25PF Active PK128 TQFP 128 C No Tray Availability
72805LB25PF8 Active PK128 TQFP 128 C No Reel Availability
72805LB10PFG Active PKG128 TQFP 128 C Yes Tray Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
72805-72845 Datasheet - Datasheet PDF 259 KB May 22, 2016
PCNs & PDNs
PCN# : A1606-02 Add Greatek Taiwan as Alternate Assembly - Product Change Notice PDF 567 KB Aug 25, 2016
PCN# G-0110-06 Mold Compound - Product Change Notice PDF 47 KB Dec 13, 2001
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products - Product Change Notice PDF 80 KB Dec 13, 2004
A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China - Product Change Notice PDF 164 KB May 9, 2006
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w - Product Change Notice PDF 24 KB Nov 13, 2012
PCN# G0106-01, Moisture Sensitive Label Change - Product Change Notice PDF 274 KB Jun 10, 2001
PCN#: A-0310-01, Green Products - Product Change Notice PDF 26 KB Oct 9, 2003
PCN#: A-0403-03, BGA package family - Product Change Notice PDF 38 KB Dec 8, 2004
PCN# G0003-03, Shipping changed (tray to tube) - Product Change Notice PDF 20 KB Mar 19, 2000
PCN#: G-0302-06, New die attach 3230 from Ablestik - Product Change Notice PDF 150 KB Mar 19, 2003
PCN#G-0302-05, New mold compound EME-G700 series - Product Change Notice PDF 65 KB Mar 19, 2003
PCN# G9911-05, To qualify low alpha mold compound. - Product Change Notice PDF 44 KB Nov 17, 1999
PCN A-0506-03; Packing Material Change - Product Change Notice PDF 290 KB Jul 18, 2005
PCN#: A-0309-05, new m/c-G770 & d/a-2300 material - Product Change Notice PDF 211 KB Oct 15, 2003
PCN#: TB-0512-01 Reel Color Changed from Blue to Black - Product Change Notice PDF 729 KB Dec 15, 2005
PCN# G-0110-06 REV.1 Mold Compound - Product Change Notice PDF 48 KB Apr 25, 2002
PCN# F-0203-04: Auto Mold Process - Product Change Notice PDF 37 KB Mar 18, 2002
PCN# F0202-04R1: Wafer Fabrication Site Change - Product Change Notice PDF 50 KB May 31, 2002

Software & Tools

Title Other Languages Type Format File Size Date
72805 HSPICE - Model - HSPICE TAR 32 KB Jun 28, 1999
72805 IBIS - Model - IBIS ZIP 11 KB Jan 21, 1999