Pinout of DDR1, DDR2, DDR3 RAM connectors

Memory DDR SDRAM DIMM (184 pin, Unbuffered)

Memory module DDR SDRAM DIMM (184 pin, Unbuffered)

Memory module dimensions DDR SDRAM DIMM (184 pin, Unbuffered)
Memory module dimensions DDR SDRAM DIMM (184 pin, Unbuffered)

Pinout of DDR SDRAM DIMM connector (184 pin, Unbuffered) Download PDF

Slot pin #

Name

Description

1

VREF

Power supply for reference

2

DQ0

Data input / output

3

VSS

Ground

4

DQ1

Data input / output

5

DQS0

Data strobe input / output

6

DQ2

Data input / output

7

VDD

Power supply (2,5V)

8

DQ3

Data input / output

9

NC

Not connected

10

NC

Not connected

11

VSS

Ground

12

DQ8

Data input / output

13

DQ9

Data input / output

14

DQS1

Data strobe input / output

15

VDD

Power supply (2,5V)

16

CK1

Clock input

17

CK1#

Clock input

18

VSS

Ground

19

DQ10

Data input / output

20

DQ11

Data input / output

21

CKE0

Clock enable input

22

VDD

Power supply (2,5V)

23

DQ16

Data input / output

24

DQ17

Data input / output

25

DQS2

Data strobe input / output

26

VSS

Ground

27

A9

Address input (multiplexed)

28

DQ18

Data input / output

29

A7

Address input (multiplexed)

30

VDD

Power supply (2,5V)

31

DQ19

Data input / output

32

A5

Address input (multiplexed)

33

DQ24

Data input / output

34

VSS

Ground

35

DQ25

Data input / output

36

DQS3

Data strobe input / output

37

A4

Address input (multiplexed)

38

VDD

Power supply (2,5V)

39

DQ26

Data input / output

40

DQ27

Data input / output

41

A2

Address input (multiplexed)

42

VSS

Ground

43

A1

Address input (multiplexed)

44

CB0

Not connected

45

CB1

Not connected

46

VDD

Power supply (2,5V)

47

DQS8

Data strobe input / output

48

A0

Address input (multiplexed)

49

CB2

Not connected

50

VSS

Ground

51

CB3

Not connected

52

BA1

Bank select address

53

DQ32

Data input / output

54

VDD

Power supply (2,5V)

55

DQ33

Data input / output

56

DQS4

Data strobe input / output

57

DQ34

Data input / output

58

VSS

Ground

59

BA0

Bank select address

60

DQ35

Data input / output

61

DQ40

Data input / output

62

VDD

Power supply (2,5V)

63

WE#

Write enable

64

DQ41

Data input / output

65

CAS#

Column address strobe

66

VSS

Ground

67

DQS5

Data strobe input / output

68

DQ42

Data input / output

69

DQ43

Data input / output

70

VDD

Power supply (2,5V)

71

NC

Not connected

72

DQ48

Data input / output

73

DQ49

Data input / output

74

VSS

Ground

75

CK2#

Clock input

76

CK2

Clock input

77

VDD

Power supply (2,5V)

78

DQS6

Data strobe input / output

79

DQ50

Data input / output

80

DQ51

Data input / output

81

VSS

Ground

82

NC

Not connected

83

DQ56

Data input / output

84

DQ57

Data input / output

85

VDD

Power supply (2,5V)

86

DQS7

Data strobe input / output

87

DQ58

Data input / output

88

DQ59

Data input / output

89

VSS

Ground

90

NC

Not connected

91

SDA

Serial data I/O

92

SCL

Serial clock

93

VSS

Ground

94

DQ4

Data input / output

95

DQ5

Data input / output

96

VDD

Power supply (2,5V)

97

DQS9

Data strobe input / output

98

DQ6

Data input / output

99

DQ7

Data input / output

100

VSS

Ground

101

NC

Not connected

102

NC

Not connected

103

NC

Not connected

104

VDD

Power supply (2,5V)

105

DQ12

Data input / output

106

DQ13

Data input / output

107

DQS10

Data strobe input / output

108

VDD

Power supply (2,5V)

109

DQ14

Data input / output

110

DQ15

Data input / output

111

CKE1

Clock enable input

112

VDD

Power supply (2,5V)

113

NC

Not connected

114

DQ20

Data input / output

115

A12

Address input (multiplexed)

116

VSS

Ground

117

DQ21

Data input / output

118

A11

Address input (multiplexed)

119

DQS11

Data strobe input / output

120

VDD

Power supply (2,5V)

121

DQ22

Data input / output

122

A8

Address input (multiplexed)

123

DQ23

Data input / output

124

VSS

Ground

125

A6

Address input (multiplexed)

126

DQ28

Data input / output

127

DQ29

Data input / output

128

VDD

Power supply (2,5V)

129

DQS12

Data strobe input / output

130

A3

Address input (multiplexed)

131

DQ30

Data input / output

132

VSS

Ground

133

DQ31

Data input / output

134

CB4

Not connected

135

CB5

Not connected

136

VDD

Power supply (2,5V)

137

CK0

Clock input

138

CK0#

Clock input

139

VSS

Ground

140

DQS17

Data strobe input / output

141

A10

Address input (multiplexed)

142

CB6

Not connected

143

VDD

Power supply (2,5V)

144

CB7

Not connected

145

VSS

Ground

146

DQ36

Data input / output

147

DQ37

Data input / output

148

VDD

Power supply (2,5V)

149

DQS13

Data strobe input / output

150

DQ38

Data input / output

151

DQ39

Data input / output

152

VSS

Ground

153

DQ44

Data input / output

154

RAS#

Row address strobe

155

DQ45

Data input / output

156

VDD

Power supply (2,5V)

157

S0#

Chip select input

158

S1#

Chip select input

159

DQS14

Data strobe input / output

160

VSS

Ground

161

DQ46

Data input / output

162

DQ47

Data input / output

163

NC

Not connected

164

VDD

Power supply (2,5V)

165

DQ52

Data input / output

166

DQ53

Data input / output

167

NC

Not connected

168

VDD

Power supply (2,5V)

169

DQS15

Data strobe input / output

170

DQ54

Data input / output

171

DQ55

Data input / output

172

VDD

Power supply (2,5V)

173

NC

Not connected

174

DQ60

Data input / output

175

DQ61

Data input / output

176

VSS

Ground

177

DQS16

Data strobe input / output

178

DQ62

Data input / output

179

DQ63

Data input / output

180

VDD

Power supply (2,5V)

181

SA0

Address in EEPROM

182

SA1

Address in EEPROM

183

SA2

Address in EEPROM

184

VDDSPD

Serial EEPROM power supply (2,3-3,6V)

Memory DDR2 SDRAM DIMM Unbuffered Module (240 pin)

Memory DDR2 SDRAM DIMM (240 pin, Unbuffered)
Memory DDR2 SDRAM DIMM (240 pin, Unbuffered)

240 pin DDR2 connector

240 pin DDR2 connector
240 pin DDR2 connector

Memory DDR2 SDRAM DIMM Unbuffered Module (240 pin) Download

Connector##

Description

Connector#

Description

1

VREF

121

VSS

2

VSS

122

DQ4

3

DQ0

123

DQ5

4

DQ1

124

VSS

5

VSS

125

DM0

6

/DQS0

126

NC

7

DQS0

127

VSS

8

VSS

128

DQ6

9

DQ2

129

DQ7

10

DQ3

130

VSS

11

VSS

131

DQ12

12

DQ8

132

DQ13

13

DQ9

133

VSS

14

VSS

134

DM1

15

/DQS1

135

NC

16

DQS1

136

VSS

17

VSS

137

CK1

18

NC

138

/CK1

19

NC

139

VSS

20

VSS

140

DQ14

21

DQ10

141

DQ15

22

DQ11

142

VSS

23

VSS

143

DQ20

24

DQ16

144

DQ21

25

DQ17

145

VSS

26

VSS

146

DM2

27

/DQS2

147

NC

28

DQS2

148

VSS

29

VSS

149

DQ22

30

DQ18

150

DQ23

31

DQ19

151

VSS

32

VSS

152

DQ28

33

DQ24

153

DQ29

34

DQ25

154

VSS

35

VSS

155

DM3

36

/DQS3

156

NC

37

DQS3

157

VSS

38

VSS

158

DQ30

39

DQ26

159

DQ31

40

DQ27

160

VSS

41

VSS

161

NC

42

NC

162

NC

43

NC

163

VSS

44

VSS

164

NC

45

NC

165

NC

46

NC

166

VSS

47

VSS

167

NC

48

NC

168

NC

49

NC

169

VSS

50

VSS

170

VDDQ

51

VDDQ

171

CKE1

52

CKE0

172

VDD

53

VDD

173

NC

54

NC

174

NC

55

NC

175

VDDQ

56

VDDQ

176

A12

57

A11

177

A9

58

A7

178

VDD

59

VDD

179

A8

60

A5

180

A6

61

A4

181

VDDQ

62

VDDQ

182

A3

63

A2

183

A1

64

VDD

184

VDD

KEY

65

VSS

185

CK0

66

VSS

186

/CK0

67

VDD

187

VDD

68

NC

188

A0

69

VDD

189

VDD

70

A10/AP

190

BA1

71

BA0

191

VDDQ

72

VDDQ

192

/RAS

73

/WE

193

/CS0

74

/CAS

194

VDDQ

75

VDDQ

195

ODT0

76

/CS1

196

A13

77

ODT1

197

VDD

78

VDDQ

198

VSS

79

VSS

199

DQ36

80

DQ32

200

DQ37

81

DQ33

201

VSS

82

VSS

202

DM4

83

/DQS4

203

NC

84

DQS4

204

VSS

85

VSS

205

DQ38

86

DQ34

206

DQ39

87

DQ35

207

VSS

88

VSS

208

DQ44

89

DQ40

209

DQ45

90

DQ41

210

VSS

91

VSS

211

DM5

92

/DQS5

212

NC

93

DQS5

213

VSS

94

VSS

214

DQ46

95

DQ42

215

DQ47

96

DQ43

216

VSS

97

VSS

217

DQ52

98

DQ48

218

DQ53

99

DQ49

219

VSS

100

VSS

220

CK2

101

SA2

221

/CK2

102

NC

222

VSS

103

VSS

223

DM6

104

/DQS6

224

NC

105

DQS6

225

VSS

106

VSS

226

DQ54

107

DQ50

227

DQ55

108

DQ51

228

VSS

109

VSS

229

DQ60

110

DQ56

230

DQ61

111

DQ57

231

VSS

112

VSS

232

DM7

113

/DQS7

233

NC

114

DQS7

234

VSS

115

VSS

235

DQ62

116

DQ58

236

DQ63

117

DQ59

237

VSS

118

VSS

238

VDDSPD

119

SDA

239

SA0

120

SCL

240

SA1

Memory DDR3 SDRAM DIMM Unbuffered Module (240 pin)

240 pin DDR3 connector

Pin descriptions and other pinout information can be found in the documentation for Micron DDR3 memory modules. Download

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