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IDT72041L40J Datasheet(PDF) 1 Page - Integrated Device Technology

Part # IDT72041L40J
Description  CMOS ASYNCHRONOUS FIFO WITH RETRANSMIT 1K x 9, 2K x 9, 4K x 9
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT72041L40J Datasheet(HTML) 1 Page - Integrated Device Technology

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Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DECEMBER 1996
©1996 Integrated Device Technology, Inc.
DSC-2677/7
5.09
1
FEATURES:
• First-In/First-Out Dual-Port memory
• Bit organization
IDT72021—1K x 9
IDT72031—2K x 9
IDT72041—4K x 9
• Ultra high speed
IDT72021—25ns access time
IDT72031—35ns access time
IDT72041—35ns access time
• Easily expandable in word depth and/or width
• Asynchronous and simultaneous read and write
• Functionally equivalent to IDT7202/03/04 with Output
Enable (
OE) and Almost Empty/Almost Full Flag (AEF)
• Four status flags: Full, Empty, Half-Full (single device
mode), and Almost Empty/Almost Full (7/8 empty or 7/8
full in single device mode)
• Output Enable controls the data output port
• Auto-retransmit capability
• Available in 32-pin DIP and PLCC
• Military product compliant to MIL-STD-883, Class B
• Industrial temperature range (-40oC to +85oC) is avail
able, tested to military electrical specifications
DESCRIPTION:
IDT72021/031/041s are high-speed, low-power, dual-port
memory devices commonly known as FIFOs (First-In/First-
Out). Data can be written into and read from the memory at
independent rates. The order of information stored and ex-
tracted does not change, but the rate of data entering the FIFO
might be different than the rate leaving the FIFO. Unlike a
Static RAM, no address information is required because the
read and write pointers advance sequentially. The IDT72021/
031/041s can perform asynchronous and simultaneous read
and write operations. There are four status flags, (
HF, FF, EF,
AEF) to monitor data overflow and underflow. Output Enable
(
OE) is provided to control the flow of data through the output
port. Additional key features are Write (
W), Read (R), Retrans-
mit (
RT), First Load (FL), Expansion In (XI) and Expansion Out
(
XO). The IDT72021/031/041s are designed for those appli-
cations requiring data control flags and Output Enable (
OE) in
multiprocessing and rate buffer applications.
The IDT72021/031/041s are fabricated using IDT’s CMOS
technology. Military grade product is manufactured in compli-
ance with the latest version of MIL-STD-883, Class B, for high
reliability systems.
IDT72021
IDT72031
IDT72041
CMOS ASYNCHRONOUS FIFO WITH
RETRANSMIT
1K x 9, 2K x 9, 4K x 9
W
R
XI
2677 drw 01
WRITE
CONTROL
WRITE
POINTER
READ
POINTER
RESET
LOGIC
READ
CONTROL
FLAG
LOGIC
EXPANSION
LOGIC
DATA INPUT
(D0–D8)
RAM
ARRAY
1024 x 9
2048 x 9
4096 x 9
1
2
DATA OUTPUTS
(Q0–Q8)
THREE-
STATE
BUFFERS
1024/
2048/
4096
AEF
EF
FF
FL/RT
XO/HF
RS
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
FUNCTIONAL BLOCK DIAGRAM
For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.


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