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72V235 - Block Diagram


2K x 18 SyncFIFO, 3.3V

The 72V235 is a 2K x 18 first-in, first-out memory with clocked read and write controls. It is a 3.3V version of the 72235 FIFO and is applicable for a wide variety of data buffering needs, such as optical disk controllers, Local Area Networks (LANs), and interprocessor communication. It has 18-bit input and output ports. The Read Clock(RCLK) 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.


  • 10 ns read/write cycle time
  • 5V input tolerant
  • 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
  • Asynchronous or synchronous programmable Almost-Empty and Almost-Full flags with default settings
  • Half-Full flag capability
  • Output enable puts output data bus in high-impedance state
  • 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)
3.31836PPG64, PP64, PN64, PNG64Synchronous3.3 V LVTTL50.00, 66.00, 100.002K x 18-40 to 85°C, 0 to 70°CUni-directional

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
72V235L10PFActivePN64TQFP64CNoTrayCheck Availability
72V235L10PF8ActivePN64TQFP64CNoReelCheck Availability
72V235L10PFGActivePNG64TQFP64CYesTrayCheck Availability
72V235L10PFG8ActivePNG64TQFP64CYesReelCheck Availability
72V235L10TFActivePP64TQFP64CNoTrayCheck Availability
72V235L10TF8ActivePP64TQFP64CNoReelCheck Availability
72V235L10TFGActivePPG64TQFP64CYesTrayCheck Availability
72V235L10TFG8ActivePPG64TQFP64CYesReelCheck Availability
72V235L15PFActivePN64TQFP64CNoTrayCheck Availability
72V235L15PF8ActivePN64TQFP64CNoReelCheck Availability
72V235L15PFIActivePN64TQFP64INoTrayCheck Availability
72V235L15PFI8ActivePN64TQFP64INoReelCheck Availability
72V235L15TFActivePP64TQFP64CNoTrayCheck Availability
72V235L15TF8ActivePP64TQFP64CNoReelCheck Availability
72V235L15TFGIActivePPG64TQFP64IYesTrayCheck Availability
72V235L15TFGI8ActivePPG64TQFP64IYesReelCheck Availability
72V235L15TFINot Recommended
PP64TQFP64INoTrayCheck Availability
72V235L15TFI8Not Recommended
PP64TQFP64INoReelCheck Availability
72V235L20PFActivePN64TQFP64CNoTrayCheck Availability
72V235L20PF8ActivePN64TQFP64CNoReelCheck Availability
72V235L20TFActivePP64TQFP64CNoTrayCheck Availability
72V235L20TF8ActivePP64TQFP64CNoReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
72V205-72V245 Datasheet Datasheet PDF 401 KB Mar 21, 2013
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
show all (19)
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
PCN# : A-0610-02 ASAT China as Alternate Facility for CABGA/CVBGA/FPBGA/TQFP/PQFP Product Change Notice PDF 252 KB Oct 19, 2006
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
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-0302-05, 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# 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
72V235 HSPICE Model - HSPICE application/x-tar 32 KB Jun 29, 1999
72V235 IBIS Model - IBIS ZIP 10 KB Apr 21, 1999