Datasheet

ManualsBrandsTranscend Manualscomputer componentsJM334S643A-75

256MB 168PIN PC133 CL3

SDRAM DIMM With 32M X 8 3.3VOLT

Description

The JM334S643A-75 is a 32M x 64bits Synchronous

Dynamic RAM high-density for PC-133. The

JM334S643A-75 consists of 8pcs CMOS 32Mx8 bits

Synchronous DRAMs in TSOP-II 400mil packages and

a 2048 bits serial EEPROM on a 168-pin printed circuit

board. The JM334S643A-75 is a Dual In-Line Memory

Module and is intended for mounting into 168-pin edge

connector sockets.

Synchronous design allows precise cycle control with

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

on every clock cycle. 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

• Performance Range: PC-133

• Conformed to JEDEC Standard 4 clocks.

• Burst Mode Operation.

• Auto and Self Refresh.

• CKE Power Down Mode.

• DQM Byte Masking (Read/Write)

• Serial Presence Detect (SPD) with serial EEPROM

• LVTTL compatible inputs and outputs.

• Single 3.3V ± 0.3V power supply.

• MRS cycle with address key programs.

Latency (Access from column address)

Burst Length (1,2,4,8 & Full Page)

Data Sequence (Sequential & Interleave)

• All inputs are sampled at the positive going edge of

the system clock.

Placement

PCB: 09-7303

Transcend information Inc. 1

Summary of content (11 pages)

PAGE 1
256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 Description Placement The JM334S643A-75 is a 32M x 64bits Synchronous Dynamic RAM high-density for PC-133. The JM334S643A-75 consists of 8pcs CMOS 32Mx8 bits Synchronous DRAMs in TSOP-II 400mil packages and a 2048 bits serial EEPROM on a 168-pin printed circuit board. The JM334S643A-75 is a Dual In-Line Memory Module and is intended for mounting into 168-pin edge connector sockets.
PAGE 2
56MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 Dimensions Side Pin Identification Millimeters Symbol Inches Function A 133.35±0.40 5.250±0.016 A0~A12, BA0,BA1 Address input B 65.67000 2.585000 DQ0~DQ63 Data Input / Output. C 23.49000 0.925000 D 8.89000 0.350000 CLK0, CLK2 Clock Input. E 3.00000 0.118000 CKE0 Clock Enable Input. F 29.21±0.200 1.150±0.0080 /CS0, /CS2 Chip Select Input. G 19.7800 0.778000 /RAS Row Address Strobe H 15.78 0.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 Pinouts: Pin No 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Pin Name Vss DQ0 DQ1 DQ2 DQ3 Vcc DQ4 DQ5 DQ6 DQ7 DQ8 Vss DQ9 DQ10 DQ11 DQ12 DQ13 Vcc DQ14 DQ15 NC NC Vss NC NC Vcc /WE DQM0 DQM1 /CS0 NC Vss A0 A2 A4 A6 A8 A10 BA1 Vcc Vcc CLK0 Transcend information Inc.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.
PAGE 5
256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 ABSOLUTE MAXIMUM RATINGS Parameter Voltage on any pin relative to Vss Symbol VIN, VOUT Value -1.0~4.6 Unit V Voltage on VDD supply to Vss VDD, VDDQ -1.0~4.6 V TSTG -55~+150 °C Power dissipation PD 8 W Short circuit current IOS 50 mA Storage temperature Mean time between failure MTBF 50 Note: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 AC OPERATING TEST CONDITIONS (VDD = 3.3V±0.3V, TA = 0 to 70°C) Parameter AC Input levels (VIH/VIL) Input timing measurement reference level Input rise and fall time Output timing measurement reference level Output load condition Value Unit 2.4/0.4 V 1.4 V tr/tf=1/1 ns 1.4 V See Fig. 2 Vtt=1.4V 3.3V 50 Ohm 1200 Ohm VOH (DC)=2.4V, IOH=-2mA VOL (DC)=0.4V, I OL=2mA Output Output Z0=50 Ohm 50pF 50pF 870 Ohm (Fig.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 AC CHARACTERISTICS (AC operating conditions unless otherwise noted) Refer to the individual component, not the whole module. Parameter Symbol Min Max Unit Note 7.5 1000 ns 1 5.4 ns 1, 2 CLK cycle time CAS latency=3 tCC CLK to valid output delay CAS latency=3 tSAC Output data hold time CAS latency=3 tOH 2.7 ns 2 CLK high pulse width tCH 2.5 ns 3 CLK low pulse width tCL 2.5 ns 3 Input setup time tSS 1.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 SIMPLIFIED TRUTH TABLE COMMAND CKEn-1 CKEn Register Mode Register Set Refresh Auto Refresh Self Refresh Entry Exit Bank Active & Row Addr.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 Serial Presence Detect Specification Serial Presence Detect Byte No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36-61 62 63 64-71 72 73-90 91-92 Function Described Standard Specification 128bytes 256bytes SDRAM 13 10 1 bank 64bits 0 LVTTL3.3V 7.5ns 5.4ns None 7.8us/Self Refresh X8 64bit 1 clock 1,2,4,8 & Full page 4 bank 3 0 clock 0 clock Non Buffer Prec All, Auto Prec, R/W Burst 7.
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256MB 168PIN PC133 CL3 SDRAM DIMM With 32M X 8 3.3VOLT JM334S643A-75 93-94 95-98 99-125 126 127 128~ Manufacturing Date Assembly Serial Number Manufacturer Specific Data Intel Specification Frequency Intel Specification CAS# Latency/Clock Signal Support Unused Storage Locations Transcend information Inc.