MC-45D32CC721KFA-C80 查看數據表（PDF） - NEC => Renesas Technology

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MC-45D32CC721KFA-C80

32 M-WORD BY 72-BIT DDR SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE

NEC => Renesas Technology 

PRELIMINARY DATA SHEET

MOS INTEGRATED CIRCUIT

MC-45D32CC721

32 M-WORD BY 72-BIT DDR SYNCHRONOUS DYNAMIC RAM MODULE

UNBUFFERED TYPE

Description

The MC-45D32CC721 is a 33,554,432 words by 72 bits DDR synchronous dynamic RAM module on which 18

pieces of 128M DDR SDRAM: µPD45D128842 are assembled.

These modules provide high density and large quantities of memory in a small space without utilizing the surface-

mounting technology on the printed circuit board.

Decoupling capacitors are mounted on power supply line for noise reduction.

Features

• 33,554,432 words by 72 bits organization (ECC type)

• Clock frequency

Part number

/CAS latency

Clock frequency

(MAX.)

Module type

MC-45D32CC721KFA-C75

CL = 2.5

133 MHz

DDR SDRAM

CL = 2

100 MHz

Unbuffered DIMM

MC-45D32CC721KFA-C80

CL = 2.5

125 MHz

Design specification

CL = 2

100 MHz

Rev.0.9 compliant

• Fully Synchronous Dynamic RAM with all signals except DM, DQS and DQ referenced to a positive clock edge

• Double Data Rate interface

Differential CLK (/CLK) input

Data inputs and DM are synchronized with both edges of DQS

Data outputs and DQS are synchronized with a cross point of CLK and /CLK

• Quad internal banks operation

• Possible to assert random column address in every clock cycle

• Programmable Mode register set

/CAS latency (2, 2.5)

Burst length (2, 4, 8)

Wrap sequence (Sequential / Interleave)

• Automatic precharge and controlled precharge

• CBR (Auto) refresh and self refresh

• 2.5 V ± 0.2 V Power supply for VDD

• 2.5 V ± 0.2 V Power supply for VDDQ

• SSTL_2 compatible with all signals

• 4,096 refresh cycles / 64 ms

• Burst termination by Precharge command and Burst stop command

• 184-pin dual in-line memory module (Pin pitch = 1.27 mm)

• Unbuffered type

• Serial PD

The information in this document is subject to change without notice. Before using this document, please

confirm that this is the latest version.

Not all devices/types available in every country. Please check with local NEC representative for

availability and additional information.

Document No. M14900EJ1V0DS00 (1st edition)

Date Published June 2000 NS CP(K)

Printed in Japan

©

2000

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