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184PIN DDR400 Unbuffered DIMM

256MB With 32Mx8 CL2.5

Transcend Information Inc.

Placement

Description

The JM334D643A-50 is a 32M x 64bits Double Data Rate

SDRAM high-density for DDR400.The JM334D643A-50

consists of 8pcs CMOS 32Mx8 bits Double Data Rate

SDRAMs in 66 pin TSOP-II 400mil packages and a 2048

bits serial EEPROM on a 184-pin printed circuit board.

The JM334D643A-50 is a Dual In-Line Memory Module

and is intended for mounting into 184-pin edge connector

sockets.

Synchronous design allows precise cycle control with the

use of system clock. Data I/O transactions are possible

on both edges of DQS. Range of operation frequencies,

programmable latencies allow the same device to be

useful for a variety of high bandwidth, high performance

memory system applications.

Features

• Power supply: VDD: 2.6V ± 0.1V, VDDQ: 2.6V ± 0.1V

• Max clock Freq: 200MHZ.

• Double-data-rate architecture; two data transfers per

clock cycle

• Differential clock inputs (CK and /CK)

• DLL aligns DQ and DQS transition with CK transition

• Auto and Self Refresh 7.8us refresh interval.

• Data I/O transactions on both edge of data strobe.

• Edge aligned data output, center aligned data

• Serial Presence Detect (SPD) with serial EEPROM

• SSTL-2 compatible inputs and outputs.

• MRS cycle with address key programs.

PCB: 09-2430

CAS Latency (Access from column address): 2.5

Burst Length (2,4,8)

Data Sequence (Sequential & Interleave)

1 2 3 4 5 6 ... 11 12

Inhaltsverzeichnis

Seite 1

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 1Placement Description The JM

Seite 2

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 10SIMPLIFIED TRUTH TABLE (V=V

Seite 3 - Pinouts:

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 11SERIAL PRESENCE DETECT SPECI

Seite 4 - CK2,/CK2

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 1243 DDR SDRAM Maximum Device

Seite 5

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 2Dimensions Side Millimeters

Seite 6 - DC CHARACTERISTICS

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 3Pinouts:Pin No Pin Name Pin N

Seite 7 - Unit Note

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 4Block Diagram A0~A12,BA0,BA1

Seite 8

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 5ABSOLUTE MAXIMUM RATINGS Para

Seite 9

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 6DC CHARACTERISTICS (Recommend

Seite 10 - Transcend Information Inc

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 7AC OPERATING CONDITIONS Par

Seite 11

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 8AC TIMING PARAMETERS & SP

Seite 12

JJJMMM333333444DDD666444333AAA---555000 184PIN DDR400 Unbuffered DIMM 256MB With 32Mx8 CL2.5 Transcend Information Inc. 9Control &Address input pu

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