DP8441VLJ-40 datasheet(1/46 Pages) NSC

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Giải thích chi tiết về linh kiện	microCMOS Programmable 16/64 Mbit Dynamic RAM Controller/Driver

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TLF11718

February 1995

DP8440-40DP8440-25DP8441-40DP8441-25

microCMOS Programmable 1664 Mbit

Dynamic RAM ControllerDriver

General Description

The DP844041 Dynamic RAM Controllers provide an easy

interface between dynamic RAM arrays and 8- 16- 32- and

64-bit microprocessors The DP844041 DRAM Controllers

generate all necessary control and timing signals to suc-

cessfully interface and design dynamic memory systems

With significant enhancements over the DP84202122

predecessors the DP844041 are suitable for high perform-

ance memory systems These controllers support page and

burst accesses for fast page static column and nibble

DRAMs Refreshes and accesses are arbitrated on chip

RAS low time during refresh and RAS precharge time are

guaranteed by these controllers Separate precharge coun-

ters for each RAS output avoid delayed back to back ac-

cesses due to precharge when using memory interleaving

Programmable features make the DP844041 DRAM Con-

trollers flexible enough to fit many memory systems

Features

Y

40 MHz and 25 MHz operation

Y

Page detection

Y

Automatic CPU burst accesses

Y

Support 141664 Mbits DRAMs

Y

High capacitance drivers for RAS CAS WE and Q out-

puts

Y

Support for fast page static column and nibble mode

DRAMs

Y

High precision PLL based delay line

Y

Byte enable for word size up to 32 bits on the DP8440

or 64 bits on the DP8441

Y

Automatic Internal Refresh

Y

Staggered RAS-Only refresh

Y

Burst and CAS-before-RAS refresh

Y

Error scrubbing during refresh

Y

TRI-STATE

outputs

Y

Easy interface to all major microprocessors

Block Diagram

TLF11718 – 1

FIGURE 1

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M75Printed in U S A

Số phần tương tự - DP8441VLJ-40

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	DP8402A	319Kb / 18P	DP8402A/DP8403/DP8404/DP8405 32-Bit Parallel Error Detection and Correction Circuits (EDACs)
	DP8402AD	319Kb / 18P	DP8402A/DP8403/DP8404/DP8405 32-Bit Parallel Error Detection and Correction Circuits (EDACs)
	DP8402AV	319Kb / 18P	DP8402A/DP8403/DP8404/DP8405 32-Bit Parallel Error Detection and Correction Circuits (EDACs)
	DP8403	319Kb / 18P	DP8402A/DP8403/DP8404/DP8405 32-Bit Parallel Error Detection and Correction Circuits (EDACs)
	DP8403D	319Kb / 18P	DP8402A/DP8403/DP8404/DP8405 32-Bit Parallel Error Detection and Correction Circuits (EDACs)

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nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	DP8420A	824Kb / 58P	microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
	DP8420V	824Kb / 60P	microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
	DP8430V	770Kb / 56P	microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
Texas Instruments	THCT4502B	127Kb / 2P	DYNAMIC RAM CONTROLLER
Integrated Silicon Solu...	IS41LV16400	143Kb / 19P	4Mx16 (64-MBIT) DYNAMIC RAM WITH EDO PAGE MODE
	IS42S16400	675Kb / 55P	1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM
	IS42S16400B	566Kb / 55P	1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM
Cypress Semiconductor	CY62187EV30	374Kb / 12P	64 Mbit (4M x 16) Static RAM
Integrated Silicon Solu...	IS42S16400E	848Kb / 55P	1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM
Integrated Silicon Solu...	IS45S16400E	849Kb / 55P	1 Meg Bits x 16 Bits x 4 Banks (64-MBIT) SYNCHRONOUS DYNAMIC RAM

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