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IDT72131 Datasheet(PDF) 1 Page - Integrated Device Technology

Part # IDT72131
Description  CMOS PARALLEL-TO-SERIAL FIFO 2048 X 9 4096 X 9
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT72131 Datasheet(HTML) 1 Page - Integrated Device Technology

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Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGES
DECEMBER 1996
©1996 Integrated Device Technology, Inc.
DSC-2751/6
5.34
1
DESCRIPTION:
The IDT72131/72141 are high-speed, low power parallel-
to-serial FIFOs. These FIFOs are ideally suited to serial
communications applications, tape/disk controllers, and local
area networks (LANs). The IDT72131/72141 can be config-
ured with the IDTs serial-to-parallel FIFOs (IDT72132/72142)
for bidirectional serial data buffering.
The FIFO has a 9-bit parallel input port and a serial output
port. Wider and deeper parallel-to-serial data buffers can be
built using multiple IDT72131/72141 chips. IDTs unique
Flexishift serial expansion logic (SOX,
NR) makes width
expansion possible with no additional components. These
FIFOs will expand to a variety of word widths including 8, 9, 16,
and 32 bits. The IDT72131/141 can also be directly connected
for depth expansion.
Five flags are provided to monitor the FIFO. The full and
empty flags prevent any FIFO data overflow or underflow
conditions. The almost-full (7/8), half-full, and almost empty
(1/8) flags signal memory utilization within the FIFO.
The IDT72131/72141 is fabricated using IDTs high-speed
submicron CMOS technology.
FEATURES:
35ns parallel port access time, 45ns cycle time
50MHz serial port shift rate
Expandable in depth and width with no external
components
Programmable word lengths including 7-9, 16-18, 32-36
bit using Flexishift
™ serial output without using any
additional components
Multiple status flags: Full, Almost-Full (1/8 from full),
Half-Full, Almost Empty (1/8 from empty), and Empty
Asynchronous and simultaneous read and write
operations
Dual-Port zero fall-through architecture
Retransmit capability in single device mode
Produced with high-performance, low power CMOS
technology
Available in 28-pin plastic DIP
Industrial temperature range (-40oC to +85oC) is avail-
able, tested to military electrical specifications
FUNCTIONAL BLOCK DIAGRAM
CMOS PARALLEL-TO-SERIAL FIFO
2048 X 9
4096 X 9
IDT72131
IDT72141
5
6
7
8
9
10
11
12
FF
W
D4
D3
1
2
3
4
26
25
24
23
22
21
20
19
Vcc
18
17
16
15
P28-1
&
C28-3
D5
D2
D1
D
XI
SOX
D6
D7
D8
FL/RT
RS
EF
XO/HF
SOCP
SO
AEF
GND
13
14
28
27
Q 4
GND
Q8
Q7
Q6
NR
2751 drw 02a
0
PIN CONFIGURATION
DIP
TOP VIEW
2751 drw 01
D0-D
RAM ARRAY
2048 x 9
4096 x 9
WRITE
POINTER
NEXT READ
POINTER
FLAG
LOGIC
EF
AEF
/HF
FF
NR
8
W
RESET LOGIC
RS
EXPANSION
LOGIC
XI
FL/RT
XO/
SERIAL OUTPUT
CIRCUITRY
SOCP
SOX
SO
Q4 Q6 Q7 Q8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.


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