MC-45D32DA721 Datasheet, PDF (1/16 Pages) Elpida Memory – 32 M-WORD BY 72-BIT DDR SYNCHRONOUS DYNAMIC RAM MODULE REGISTERED TYPE

PRELIMINARY DATA SHEET
MOS INTEGRATED CIRCUIT
MC-45D32DA721
32 M-WORD BY 72-BIT DDR SYNCHRONOUS DYNAMIC RAM MODULE
REGISTERED TYPE
Description
The MC-45D32DA721 is a 33,554,432 words by 72 bits DDR synchronous dynamic RAM module on which 18
pieces of 128M DDR SDRAM: µPD45D128442 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-45D32DA721KF-C75
CL = 2.5
133 MHz
DDR Registered DIMM
CL = 2
100 MHz
Design specification Rev. 0.6 compliant
MC-45D32DA721KF-C80
CL = 2.5
125 MHz
CL = 2
100 MHz
MC-45D32DA721KFA-C75
CL = 2.5
133 MHz
DDR Registered DIMM
CL = 2
100 MHz
Design specification Rev. 0.9 compliant
MC-45D32DA721KFA-C80
CL = 2.5
125 MHz
CL = 2
100 MHz
• 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
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 Elpida Memory, Inc. for
availability and additional information.
Document No. E0037N10 (1st edition)
(Previous No. M14825EJ2V0DS00)
Date Published January 2001 CP (K)
Printed in Japan
Elpida Memory, Inc. is a joint venture DRAM company of NEC Corporation and Hitachi, Ltd.