COMMERCIAL TEMPERATURE RANGES

DECEMBER 1996

©1996 Integrated Device Technology, Inc.

DSC-3274/1

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

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 expansion logic to allow for

unlimited expansion capability in both word size and depth.

Data is toggled in and out of the device through the use of

the Write (

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) capa-

bility that allows the read pointer 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.

The IDT7208 is fabricated using IDT’s high-speed CMOS

technology. It is designed for applications requiring asynchro-

nous and simultaneous read/writes in multiprocessing, rate

buffering, and other applications.

FUNCTIONAL BLOCK DIAGRAM

Integrated Device Technology, Inc.

FEATURES:

• 65536 x 9 storage capacity

• High-speed: 15ns access time

• Low power consumption

— Active: 660mW (max.)

— Power-down: 44mW (max.)

• Asynchronous and simultaneous read and write

• Fully expandable in both word depth and width

• Pin and functionally compatible with IDT720x family

• Status Flags: Empty, Half-Full, Full

• Retransmit capability

• High-performance CMOS technology

able, tested to military electrical specifications

DESCRIPTION:

The IDT7208 is a monolithic dual-port memory buffer with

W

WRITE

CONTROL

READ

CONTROL

R

FLAG

LOGIC

EXPANSION

LOGIC

XI

WRITE

POINTER

RAM ARRAY

65,536 x 9

READ

POINTER

DATA INPUTS

RESET

LOGIC

THREE-

STATE

BUFFERS

DATA OUTPUTS

EF

FF

XO/HF

RS

FL/RT

0

0

3274 drw 01

•

•

•

•

•

•

•

•

For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.

5.06

1

CMOS ASYNCHRONOUS FIFO

65,536 x 9

ADVANCED

INFORMATION

IDT7208