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72845 - Block Diagram

72845

4K x 18 DualSync FIFO, 5.0V

The 72845 is a 4K x 18 First-In, First-Out memory with clocked read and write controls. It is functionally equivalent to two 72245 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 Specification

Core Voltage (V)Bus Width (bits)Density (Kb)Pkg. Code
51872PK128

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
72845LB10PFActivePK128TQFP128CNoTrayCheck Availability
72845LB10PF8ActivePK128TQFP128CNoReelCheck Availability
72845LB15PFActivePK128TQFP128CNoTrayCheck Availability
72845LB15PF8ActivePK128TQFP128CNoReelCheck Availability
72845LB15PFIActivePK128TQFP128INoTrayCheck Availability
72845LB15PFI8ActivePK128TQFP128INoReelCheck Availability
72845LB25PFActivePK128TQFP128CNoTrayCheck Availability
72845LB25PF8ActivePK128TQFP128CNoReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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72805-72845 Datasheet Datasheet PDF 259 KB May 23, 2016
PCNs & PDNs
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PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
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A-0603-04 Transfer TQFP and PQFP from ASAT HK to ASAT China Product Change Notice PDF 164 KB May 10, 2006
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PCN A-0506-03; Packing Material Change Product Change Notice PDF 290 KB Jul 19, 2005
show all (15)
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PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 14, 2004
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PCN#: A-0309-05, new m/c-G770 & d/a-2300 material Product Change Notice PDF 211 KB Oct 16, 2003
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PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 10, 2003
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PCN#G-0302-05, New mold compound EME-G700 series Product Change Notice PDF 65 KB Mar 20, 2003
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PCN#: G-0302-06, New die attach 3230 from Ablestik Product Change Notice PDF 150 KB Mar 20, 2003
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PCN# F0202-04R1: Wafer Fabrication Site Change Product Change Notice PDF 50 KB Jun 1, 2002
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PCN# G-0110-06 REV.1 Mold Compound Product Change Notice PDF 48 KB Apr 26, 2002
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PCN# F-0203-04: Auto Mold Process Product Change Notice PDF 37 KB Mar 19, 2002
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PCN# G-0110-06 Mold Compound Product Change Notice PDF 47 KB Dec 14, 2001
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PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 2001
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PCN# G0003-03, Shipping changed (tray to tube) Product Change Notice PDF 20 KB Mar 20, 2000
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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
locked
72845 HSPICE Model - HSPICE application/x-tar 32 KB Jun 29, 1999
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72845 IBIS Model - IBIS ZIP 11 KB Jan 22, 1999