MC-458CB646F-A80 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

MC-458CB646F-A80

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

NEC => Renesas Technology 

DATA SHEET

MOS INTEGRATED CIRCUIT

MC-458CB646

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

UNBUFFERED TYPE

Description

The MC-458CB646 is a 8,388,608 words by 64 bits synchronous dynamic RAM module on which 8 pieces of 64M

SDRAM: µPD4564841 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

/CAS latency Clock frequency Access time from CLK

Power consumption (MAX.)

(MAX.)

(MAX.)

Active

Standby

MC-458CB646F-A80

CL = 3

125 MHz

6 ns

3,888 mW

14.4 mW

CL = 2

100 MHz

6 ns

3,744 mW

(CMOS level input )

MC-458CB646F-A10

CL = 3

100 MHz

6 ns

3,888 mW

CL = 2

77 MHz

7 ns

3,744 mW

MC-458CB646LFA-A80

CL = 3

125 MHz

6 ns

3,888 mW

CL = 2

100 MHz

6 ns

3,744 mW

MC-458CB646LFA-A10

CL = 3

100 MHz

6 ns

3,888 mW

CL = 2

77 MHz

7 ns

3,744 mW

• 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. M13049EJ5V0DS00 (5th edition)

Date Published February 1999 NS CP(K)

The mark • shows major revised points.

Printed in Japan

©

1997

Share Link: