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IDT723673

CMOS SyncFIFO™ WITH BUS-MATCHING 2,048 x 36 4,096 x 36 8,192 x 36

Integrated Device Technology 

CMOS SyncFIFOTM WITH BUS-MATCHING

2,048 x 36

4,096 x 36

8,192 x 36

IDT723653

IDT723663

IDT723673

FEATURES

• Memory storage capacity:

IDT723653 – 2,048 x 36

IDT723663 – 4,096 x 36

IDT723673 – 8,192 x 36

• Clock frequencies up to 83 MHz (8 ns access time)

• Clocked FIFO buffering data from Port A to Port B

• IDT Standard timing (using EF and FF) or First Word Fall

Through Timing (using OR and IR flag functions)

• Programmable Almost-Empty and Almost-Full flags; each has

five default offsets (8, 16, 64, 256 and 1,024)

• Serial or parallel programming of partial flags

• Port B bus sizing of 36 bits (long word), 18 bits (word) and 9 bits

(byte)

• Big- or Little-Endian format for word and byte bus sizes

• Retransmit Capability

• Reset clears data and configures FIFO, Partial Reset clears data

but retains configuration settings

• Mailbox bypass registers for each FIFO

• Free-running CLKA and CLKB may be asynchronous or

coincident (simultaneous reading and writing of data on a single

clock edge is permitted)

• Easily expandable in width and depth

• Auto power down minimizes power dissipation

• Available in a space-saving 128-pin Thin Quad Flatpack (TQFP)

• Pin compatible with the lower density parts, IDT723623/723633/

723643

• Industrial temperature range (–40°C to +85°C) is available

FUNCTIONAL BLOCK DIAGRAM

CLKA

CSA

W/RA

ENA

MBA

Port-A

Control

Logic

RS1

RS2

PRS

RT

RTM

FIFO1

Mail1,

Mail2,

Reset

Logic

36

FIFO

Retransmit

Logic

A0-A35

Mail 1

Register

36

RAM ARRAY

2,048 x 36

36

4,096 x 36

8,192 x 36

Write

Pointer

Read

Pointer

MBF1

36

B0-B35

FF/IR

AF

Status Flag

Logic

EF/OR

AE

FS2

FS0/SD

FS1/SEN

36

Programmable Flag

Timing

Offset Registers

Mode

13

MBF2

Mail 2

Register

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

COMMERCIAL TEMPERATURE RANGE

1

 2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.

36

Port-B

Control

Logic

FWFT

CLKB

CSB

W/RB

ENB

MBB

BE

BM

SIZE

5610 drw01

NOVEMBER 2003

DSC-5610/4

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