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72271 - Block Diagram


32K x 9 SuperSync FIFO, 5.0V

The 72271 is a 32K x 9 SuperSync FIFO memory with clocked read and write controls. The Frequency Select pin (FS) has been removed, thus it is no longer necessary to select which of the two clock inputs, RCLK or WCLK, is running at the higher frequency. The period required by the retransmit operation and the first word data latency period is now fixed and short. (The variable clock cycle counting delay associated with the latency period found on previous SuperSync devices has been eliminated on this SuperSync family.)


  • Pin-compatible with the 722x1 SuperSync FIFOs
  • 10ns read/write cycle time (8ns access time)
  • Fixed, low first word data latency time
  • Auto power down minimizes standby power consumption
  • Retransmit operation with fixed, low first word data latency time
  • Empty, Full and Half-Full flags signal FIFO status
  • Programmable Almost-Empty and Almost-Full flags
  • Easily expandable in depth and width
  • Independent Read and Write clocks (permit reading and writing simultaneously)
  • Available in 64-pin TQFP and STQFP packages
  • 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)
59288PN64, PP64, PNG64Synchronous5.0 V TTL50.00, 66.00, 100.0032K x 9-40 to 85°C, 0 to 70°CUni-directional

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
72271LA10PFActivePN64TQFP64CNoTrayCheck Availability
72271LA10PF8ActivePN64TQFP64CNoReelCheck Availability
72271LA10PFGActivePNG64TQFP64CYesTrayCheck Availability
72271LA10PFG8ActivePNG64TQFP64CYesReelCheck Availability
72271LA10TFActivePP64TQFP64CNoTrayCheck Availability
72271LA10TF8ActivePP64TQFP64CNoReelCheck Availability
72271LA15PFActivePN64TQFP64CNoTrayCheck Availability
72271LA15PF8ActivePN64TQFP64CNoReelCheck Availability
72271LA15PFINot Recommended
PN64TQFP64INoTrayCheck Availability
72271LA15PFI8Not Recommended
PN64TQFP64INoReelCheck Availability
72271LA15TFActivePP64TQFP64CNoTrayCheck Availability
72271LA15TF8ActivePP64TQFP64CNoReelCheck Availability
72271LA15TFIActivePP64TQFP64INoTrayCheck Availability
72271LA15TFI8ActivePP64TQFP64INoReelCheck Availability
72271LA20PFActivePN64TQFP64CNoTrayCheck Availability
72271LA20PF8ActivePN64TQFP64CNoReelCheck Availability
72271LA20PFINot Recommended
PN64TQFP64INoTrayCheck Availability
72271LA20PFI8Not Recommended
PN64TQFP64INoReelCheck Availability
72271LA20TFNot Recommended
PP64TQFP64CNoTrayCheck Availability
72271LA20TF8Not Recommended
PP64TQFP64CNoReelCheck Availability
72271LA20TFIActivePP64TQFP64INoTrayCheck Availability
72271LA20TFI8ActivePP64TQFP64INoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
72261LA/72271LA Datasheet Datasheet PDF 440 KB Jul 25, 2013
PCN# : A1606-02 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 567 KB Aug 26, 2016
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
show all (17)
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# F0509-01: Datasheet Update Product Change Notice PDF 94 KB Oct 18, 2005
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-0310-01, Green Products Product Change Notice PDF 26 KB Oct 10, 2003
PCN#: G-0302-06, New die attach 3230 from Ablestik Product Change Notice PDF 150 KB Mar 20, 2003
PCN#G-0302-05, New mold compound EME-G700 series Product Change Notice PDF 65 KB Mar 20, 2003
PCN# G-0206-08, Orientation of square PQFP & TQFP Product Change Notice PDF 150 KB Jun 17, 2002
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# 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# 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
72271 HSPICE Model - HSPICE application/x-tar 40 KB Jun 30, 1999
72271LA IBIS Model - IBIS ZIP 10 KB Jun 11, 2007