MC-458CB647XFA-A75 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

View to exact match

MC-458CB647XFA-A75

8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE

NEC => Renesas Technology 

DATA SHEET

MOS INTEGRATED CIRCUIT

MC-458CB647

8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE

UNBUFFERED TYPE

5 Description

The MC-458CB647EFA, MC-458CB647PFA and MC-458CB647XFA are 8,388,608 words by 64 bits synchronous

dynamic RAM module on which 4 pieces of 128M SDRAM: µPD45128163 are assembled.

This module provides 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

• 8,388,608 words by 64 bits organization

• Clock frequency and access time from CLK

Part number

MC-458CB647EFA-A75

MC-458CB647PFA-A75

5 MC-458CB647XFA-A75

/CAS latency

CL = 3

CL = 2

CL = 3

CL = 2

CL = 3

CL = 2

Clock frequency

(MAX.)

133 MHz

100 MHz

133 MHz

100 MHz

133 MHz

100 MHz

Access time from CLK

(MAX.)

5.4 ns

6.0 ns

5.4 ns

6.0 ns

5.4 ns

6.0 ns

• Fully Synchronous Dynamic RAM, with all signals referenced to a positive clock edge

• Pulsed interface

• Possible to assert random column address in every cycle

• Quad internal banks controlled by BA0 and BA1 (Bank Select)

• Programmable burst-length (1, 2, 4, 8 and full page)

• Programmable wrap sequence (sequential / interleave)

• Programmable /CAS latency (2, 3)

• Automatic precharge and controlled precharge

• CBR (Auto) refresh and self refresh

• All DQs have 10 Ω ± 10 % of series resistor

• Single 3.3 V ± 0.3 V power supply

• LVTTL compatible

• 4,096 refresh cycles /64 ms

• Burst termination by Burst Stop command and Precharge command

• 168-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. M14279EJ4V0DS00 (4th edition)

Date Published September 2000 NS CP(K)

The mark • shows major revised points.

Printed in Japan

©

1999

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