WED3DG644V-D1 查看數據表（PDF） - White Electronic Designs Corporation

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WED3DG644V-D1

32MB – 4Mx64 SDRAM, UNBUFFERED

White Electronic Designs Corporation 

White Electronic Designs

WED3DG644V-D1

32MB – 4Mx64 SDRAM, UNBUFFERED

FEATURES

„ PC100 and PC133 compatible

„ Burst Mode Operation

„ Auto and Self Refresh capability

„ LVTTL compatible inputs and outputs

„ Serial Presence Detect with EEPROM

„ Fully synchronous: All signals are registered on the

positive edge of the system clock

„ Programmable Burst Lengths: 1, 2, 4, 8 or Full

Page

„ 3.3V ± 0.3V Power Supply

„ 144 Pin SO-DIMM JEDEC

• D1: 27.94 (1.10”)

DESCRIPTION

The WED3DG644V is a 4Mx64 synchronous DRAM

module which consists of four 4Mx16 SDRAM components

in TSOP II package, and one 2Kb EEPROM in an 8

pin TSOP package for Serial Presence Detect which

are mounted on a 144 pin SO-DIMM multilayer FR4

Substrate.

* This product is subject to change without notice.

NOTE: Consult factory for availability of:

• RoHS compliant products

• Vendor source control options

• Industrial temperature option

PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)

Pin Front Pin Back Pin Front Pin Back Pin Back Pin Back

1 VSS 2 VSS 51 DQ14 52 DQ46 95 DQ21 96 DQ53

3 DQ0 4 DQ32 53 DQ15 54 DQ47 97 DQ22 98 DQ54

5 DQ1 6 DQ33 55 VSS 56 VSSv 99 DQ23 100 DQ55

7 DQ2 8 DQ34 57 NC 58 NC 101 VCC 102 VCC

9 DQ3 10 DQ35 59 NC 60 NC 103 A6 104 A7

11 VCC 12 VCC

105 A8 106 BA0

13 DQ4 14 DQ36 VOLTAGE KEY 107 VSS 108 VSS

15 DQ5 16 DQ37

109 A9 110 BA1

17 DQ6 18 DQ38 61 CLK0 62 CKE0 111 A10/AP 112 A11

19 DQ7 20 DQ39 63 VCC 64 VCC 113 VCC 114 VCC

21 VSS 22 VSS 65 RAS# 66 CAS# 115 DQM2 116 DQM6

23 DQM0 24 DQM4 67 WE# 68 *CKE1 117 DQM3 118 DQM7

25 DQM1 26 DQM5 69 CS0# 70 *A12 119 VSS 120 VSS

27 VCC 28 VCC 71 *CS1# 72 *A13 121 DQ24 122 DQ56

29 A0 30 A3 73 DNU 74 *CK1 123 DQ25 124 DQ57

31 A1 32 A4 75 VSS 76 VSS 125 DQ26 126 DQ58

33 A2 34 A5 77 NC 78 NC 127 DQ27 128 DQ59

35 VSS 36 VSS 79 NC 80 NC 129 VCC 130 VCC

37 DQ8 38 DQ40 81 VCC 82 VCC 131 DQ28 132 DQ60

39 DQ9 40 DQ41 83 DQ16 84 DQ48 133 DQ29 134 DQ61

41 DQ10 42 DQ42 85 DQ17 86 DQ49 135 DQ30 136 DQ62

43 DQ11 44 DQ43 87 DQ18 88 DQ50 137 DQ31 138 DQ63

45 VCC 46 VCC 89 DQ19 90 DQ51 139 VSS 140 VSS

47 DQ12 48 DQ44 91 VSS 92 VSS 141 **SDA 142 **SCL

49 DQ13 50 DQ45 93 DQ20 94 DQ52 143 VCC 144 VCC

A0 – A11

BA0-1

DQ0-63

CLK0

CKE0

CS0#

RAS#

CAS#

WE#

DQM0-7

VCC

VSS

*VREF

SDA

SCL

DNU

NC

PIN NAMES

Address input (Multiplexed)

Select Bank

Data Input/Output

Clock input

Clock Enable input

Chip select Input

Row Address Strobe

Column Address Strobe

Write Enable

DQM

Power Supply (3.3V)

Ground

Power supply for reference

Serial data I/O

Serial clock

Do not use

No Connect

* These pins are not used in this module.

** These pins should be NC in the system

which does not support SPD.

June 2006

Rev. 3

1

White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

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