Integrated Device Technology, Inc.

FEATURES:

• Free-running CLKA and CLKB may be asynchronous or

coincident (permits simultaneous reading and writing of

data on a single clock edge)

• 64 x 36 storage capacity

• Synchronous data buffering from Port A to Port B

• Mailbox bypass register in each direction

• Programmable Almost-Full (

AF) and Almost-Empty (AE)

flags

• Microprocessor Interface Control Logic

• Full Flag (

FF) and Almost-Full (AF) flags synchronized by

CLKA

• Empty Flag (

EF) and Almost-Empty (AE) flags synchro-

nized by CLKB

• Passive parity checking on each Port

• Parity Generation can be selected for each Port

• Supports clock frequencies up to 67MHz

COMMERCIAL TEMPERATURE RANGE

MAY 1997

©1997 Integrated Device Technology, Inc.

DSC-3024/4

IDT723611

CMOS SyncFIFO

64 x 36

• Fast access times of 10ns

• Available in 132-pin Plastic Quad Flatpack (PQF) or

space-saving 120-pin Thin Quad Flatpack (PF)

• Low-power advanced CMOS technology

able, tested to military elecrical specifications

DESCRIPTION:

The IDT723611 is a monolithic, high-speed, low-power,

CMOS Synchronous (clocked) FIFO memory which supports

clock frequencies up to 67MHz and has read access times as

fast as 10ns. The 64 x 36 dual-port FIFO buffers data from Port

A to Port B. The FIFO has flags to indicate empty and full

conditions, and two programmable flags, Almost-Full (

AF) and

Almost-Empty (

AE), to indicate when a selected number of

words is stored in memory. Communication between each

port can take place through two 36-bit mailbox registers. Each

FUNCTIONAL BLOCK DIAGRAM

Mail 2

Register

Mail 1

Register

Write

Pointer

Read

Pointer

Status Flag

Logic

CLKA

CSA

W/

RA

ENA

MBA

Port-A

Control

Logic

Reset

Logic

RST

PEFA

MBF2

CLKB

CSB

W/

RB

ENB

MBB

Port-B

Control

Logic

MBF1

EF

AE

36

FF

AF

3024 drw 01

Programmable

Flag Offset

Registers

Parity

Gen/Check

FIFO

ODD/

EVEN

PGA

Parity

Gen/Check

PGB

PEFB

36

64 x 36

SRAM

•

SyncFIFO is a trademark and the IDT logo is a registered trademark of Integrated Device Technology, Inc.

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