IDT73720

更新时间： 2024-10-01 22:55:27

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
8页	78K
描述
16-BIT TRI-PORT BUS EXCHANGER

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IDT73720 数据手册

IDT73720/A

16-BIT TRI-PORT

BUS EXCHANGER

Integrated Device Technology, Inc.

FEATURES:

DESCRIPTION:

• High-speed 16-bit bus exchange for interbus communica-

tion in the following environments:

— Multi-way interleaving memory

— Multiplexed address and data busses

• Direct interface to R3051 family RISChipSet

— R3051 family of integrated RISController CPUs

— R3721 DRAM controller

The IDT73720/A Bus Exchanger is a high speed 16-bit bus

exchange device intended for inter-bus communication in

interleaved memory systems and high performance multi-

plexed address and data busses.

The Bus Exchanger is responsible for interfacing between

the CPU A/D bus (CPU address/data bus) and multiple

memory data busses.

• Data path for read and write operations

• Low noise 12mA TTL level outputs

• Bidirectional 3-bus architecture: X, Y, Z

— One CPU bus: X

— Two (interleaved or banked) memory busses:Y & Z

— Each bus can be independently latched

• Byte control on all three busses

The 73720/A uses a three bus architecture (X, Y, Z), with

control signals suitable for simple transfer between the CPU

bus (X) and either memory bus (Y or Z). The Bus Exchanger

featuresindependentreadandwrite latchesforeachmemory

bus, thus supporting a variety of memory strategies. All three

ports support byte enable to independently enable upper and

lower bytes.

• Source terminated outputs for low noise and undershoot

control

• 68-pin PLCC and 80-pin PQFP package

• High-performance CMOS technology.

FUNCTIONAL BLOCK DIAGRAM

OEYL

Y0:7

LEXY

Y-WRITE

LATCH

Y8:15

(Even Path)

OEYU

LEYX

Y-READ

LATCH

OEXL

OEXU

PATH

OEXL

OEYU

OEYL

OEZU

OEZL

X0:7

T/R

BUS CONTROL

OEU

OEL

X8:15

OEXU

Z-READ

LATCH

LEZX

OEZL

OEZU

Z0:7

Z-WRITE

LATCH

LEXZ

Z8:15

(Odd Path)

2527 drw 01

Figure 1. 73720 Block Diagram

NOTE:

1. Logic equations for bus control:

OEXU = T/R* . OEU*; OEXL = T/R* . OEL*; OEYU = T/R . PATH . OEU*

OEYL = T/R . PATH . OEL*; OEZU = T/R . PATH* . OEU*; OEZL = T/R . PATH* . OEL*

RISChipSet, RISController, R305x, R3051, R3052 are trademarks and the IDT logo is a registered trademark of Integrated Device Technology, Inc.

COMMERCIAL TEMPERATURE RANGE

AUGUST 1995

1995 Integrated Device Technology, Inc.

11.5

DSC-2046/6

12 3 4 5 6 7 8

中文翻译

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与IDT73720相关器件

型号	品牌	获取价格	描述	数据表
IDT73720A	IDT	获取价格	16-BIT TRI-PORT BUS EXCHANGER
IDT73720AJ	IDT	获取价格	16-BIT TRI-PORT BUS EXCHANGER
IDT73720AJ8	IDT	获取价格	Bus Exchanger, 73 Series, 1-Func, 16-Bit, True Output, CMOS, PQCC68, PLASTIC, LCC-68
IDT73720APQF	IDT	获取价格	16-BIT TRI-PORT BUS EXCHANGER
IDT73720APQF9	IDT	获取价格	Bus Exchanger, 73 Series, 1-Func, 16-Bit, True Output, CMOS, PQFP80, PLASTIC, QFP-80
IDT73720J	IDT	获取价格	16-BIT TRI-PORT BUS EXCHANGER
IDT73720J8	IDT	获取价格	Bus Exchanger, 73 Series, 1-Func, 16-Bit, True Output, CMOS, PQCC68, PLASTIC, LCC-68
IDT73720PQ	IDT	获取价格	暂无描述
IDT73720PQF	IDT	获取价格	16-BIT TRI-PORT BUS EXCHANGER
IDT73720PQF8	IDT	获取价格	Bus Exchanger, 73 Series, 1-Func, 16-Bit, True Output, CMOS, PQFP80, PLASTIC, QFP-80

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