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240PIN DDR2 533 Unbuffered DIMM

256MB With 32Mx16 CL4

Transcend Information Inc.

Description

The JM335Q644A-5 is a 32M x 64bits DDR2-533

Unbuffered DIMM. The JM335Q644A-5 consists of 4 pcs

32Mx16bits DDR2 SDRAMs in 60 ball FBGA packages

and a 2048 bits serial EEPROM on a 240-pin printed

circuit board. The JM335Q644A-5 is a Dual In-Line

Memory Module and is intended for mounting into 240-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

• RoHS compliant products

• JEDEC standard 1.8V ± 0.1V Power supply

• VDDQ=1.8V ± 0.1V

• Max clock Freq: 267MHZ; 533Mb/S/Pin.

• Posted CAS

• Programmable CAS Latency: 3,4,5

• Programmable Additive Latency :0, 1,2,3 and 4

• Write Latency (WL) = Read Latency (RL)-1

• Burst Length: 4,8(Interleave/nibble sequential)

• Programmable sequential / Interleave Burst Mode

• Bi-directional Differential Data-Strobe (Single-ended

data-strobe is an optional feature)

• Off-Chip Driver (OCD) Impedance Adjustment

• MRS cycle with address key programs.

• On Die Termination

• Serial presence detect with EEPROM

Placement

PCB: 09-2450

1 2 3 4 5 6 ... 10 11

Sommario

Pagina 1

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 1Description The JM335Q644A-5 is

Pagina 2

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 10SERIAL PRESENCE DETECT SPECIFIC

Pagina 3 - Pinouts:

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 1137 Internal write to read comma

Pagina 4 - Block Diagram

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 2Dimensions Side Millimeters I

Pagina 5

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 3Pinouts: Pin No Pin Name Pin No

Pagina 6

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 4Block Diagram /CS0DQS3DM3/DQS3VD

Pagina 7 - Unit Note

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 5Absolute Maximum DC Ratings Para

Pagina 8

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 6IDD Specification parameters Def

Pagina 9

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 7 Input AC Logic Level Parameter

Pagina 10 - Transcend Information Inc

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 8Timing Parameters & Specific

Pagina 11 - JM335Q644A-5

JJJMMM333333555QQQ666444444AAA---555 240PIN DDR2 533 Unbuffered DIMM256MB With 32Mx16 CL4 Transcend Information Inc. 9Four Activate Window for 2KB pag

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