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DSC-2661/12

© 2001 Integrated Device Technology, Inc.

MAY 2001

CMOS ASYNCHRONOUS FIFO

2,048 x 9, 4,096 x 9

8,192 x 9, 16,384 x 9

32,768 x 9, 65,536 x 9

IDT7203

IDT7204

IDT7205

IDT7206

IDT7207

IDT7208

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

COMMERCIAL, MILITARY AND INDUSTRIAL TEMPERATURE RANGES

FEATURES:

— Active: 660mW (max.)

— Power-down: 44mW (max.)

(IDT7203), and 5962-89568 (IDT7204) are listed on this function

DESCRIPTION:

The IDT7203/7204/7205/7206/7207/7208 are dual-port memory buffers

with internal pointers that load and empty data on a first-in/first-out basis. The

device uses Full and Empty flags to prevent data overflow and underflow and

expansionlogictoallowforunlimitedexpansioncapabilityinbothwordsizeand

depth.

DataistoggledinandoutofthedevicethroughtheuseoftheWrite(

W)and

Read (

R) pins.

The device's 9-bit width provides a bit for a control or parity at the user’s

option. It also features a Retransmit (

RT)capabilitythatallowsthereadpointer

to be reset to its initial position when

RT is pulsed LOW. A Half-Full Flag is

available in the single device and width expansion modes.

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

They are designed for applications requiring asynchronous and simultaneous

read/writes in multiprocessing, rate buffering and other applications.

Militarygradeproductismanufacturedincompliancewiththelatestrevision

of MIL-STD-883, Class B.

FUNCTIONAL BLOCK DIAGRAM

°C to +85°C) is available

(plastic packages only)

W

WRITE

CONTROL

READ

CONTROL

R

FLAG

LOGIC

EXPANSION

LOGIC

XI

WRITE

POINTER

RAM ARRAY

2,048 x 9

4,096 x 9

8,192 x 9

16,384 x 9

32,768 x 9

65,536 x 9

READ

POINTER

DATA INPUTS

RESET

LOGIC

THREE-

STATE

BUFFERS

DATA OUTPUTS

EF

FF

XO/HF

RS

FL/RT

0

0

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