IDT72V82L15PA datasheet(1/11 Pages) IDT

Part #	IDT72V82L15PA

Description	3.3 Volt CMOS DUAL ASYNCHRONOUS FIFO DUAL 512 x 9, DUAL 1,024 x 9 DUAL 2,048 x 9, DUAL 4,096 X 9

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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1

1999

Integrated Device Technology, Inc.

DSC-3966/-

©

August 1999

IDT72V81

IDT72V82

IDT72V83

IDT72V84

IDT72V85

3.3 Volt CMOS DUAL ASYNCHRONOUS FIFO

DUAL 512 x 9, DUAL 1,024 x 9

DUAL 2,048 x 9, DUAL 4,096 X 9

DUAL 8,192 X 9

FEATURES:

♦

♦ The IDT72V81 is equivalent to two IDT72V01 - 512 x 9 FIFOs

♦

♦ The IDT72V82 is equivalent to two IDT72V02 - 1,024 x 9 FIFOs

♦

♦ The IDT72V83 is equivalent to two IDT72V03 - 2,048 x 9 FIFOs

♦

♦ The IDT72V84 is equivalent to two IDT72V04 - 4,096 x 9 FIFOs

♦

♦ The IDT72V85 is equivalent to two IDT72V05 - 8,192 x 9 FIFOs

♦

♦ Low power consumption

— Active: 330 mW (max.)

— Power-down: 18 mW (max.)

♦

♦ Ultra high speed—15 ns access time

♦

♦ Asynchronous and simultaneous read and write

♦

♦ Offers optimal combination of data capacity, small foot print

and functional flexibility

♦

♦ Ideal for bidirectional, width expansion, depth expansion, bus-

matching, and data sorting applications

♦

♦ Status Flags: Empty, Half-Full, Full

♦

♦ Auto-retransmit capability

♦

♦ High-performance CEMOS™ technology

♦

♦ Space-saving TSSOP package

♦

♦ Industrial temperature range (–40

°°°°°C to +85°°°°°C) is available

DESCRIPTION:

TheIDT72V81/72V82/72V83/72V84/72V85aredual-FIFOmemoriesthat

loadandemptydataonafirst-in/first-outbasis.Thesedevicesarefunctionaland

compatible to two IDT72V01/72V02/72V03/72V04/72V05 FIFOs in a single

package with all associated control, data, and flag lines assigned to separate

pins. The devices use Full and Empty flags to prevent data overflow and

underflowandexpansionlogictoallowforunlimitedexpansioncapabilityinboth

word size and depth.

The reads and writes are internally sequential through the use of ring

pointers, with no address information required to load and unload data. Data

is toggled in and out of the devices through the use of the Write (

W) and Read

(

R) pins.

The devices utilize a 9-bit wide data array to allow for control and parity

bitsattheuser’soption.Thisfeatureis especiallyusefulindatacommunications

applications where it is necessary to use a parity bit for transmission/reception

errorchecking.ItalsofeaturesaRetransmit(

RT)capabilitythatallowsforreset

of the read pointer to its initial position when

RT is pulsed low to allow for

retransmission from the beginning of data. A Half-Full Flag is available in the

single device mode and width expansion modes.

These FIFOs are fabricated using IDT’s high-speed CMOS technology.

They are designed for those applications requiring asynchronous and simul-

taneous read/writes in multiprocessing and rate buffer applications.

FUNCTIONAL BLOCK DIAGRAM

WA

WRITE

CONTROL

READ

CONTROL

RA

FLAG

LOGIC

EXPANSION

LOGIC

XIA

WRITE

POINTER

RAM

ARRAY A

512 x 9

1,024 x 9

2,048 x 9

4,096 x 9

8,192 x 9

READ

POINTER

DATA INPUTS

RESET

LOGIC

THREE-

STATE

BUFFERS

DATA

OUTPUTS

RSA

FLA/RTA

XOA/HFA

FFA

EFA

WB

WRITE

CONTROL

READ

CONTROL

RB

FLAG

LOGIC

EXPANSION

LOGIC

XIB

WRITE

POINTER

READ

POINTER

DATA INPUTS

RESET

LOGIC

THREE-

STATE

BUFFERS

DATA

OUTPUTS

RSB

FLB/RTB

3966 drw 01

XOB/HFB

FFB

EFB

(DA0-DA8)

(QA0-QA8)

(QB0-QB8)

(DB0-DB8)

RAM

ARRAY A

512 x 9

1,024 x 9

2,048 x 9

4,096 x 9

8,192 x 9

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