CYM74S551PM-50C View Datasheet(PDF) - Cypress Semiconductor
Part Name
Description
Manufacturer
CYM74S551PM-50C Datasheet PDF : 8 Pages
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PRELIMINARY
CYM74B550
CYM74P550A
CYM74S550, CYM74S551
Pin Configuration
Dual Read-Out SIMM (DIMM)
Top View
GND 81
D63
82
D61
83
VCC5
84
D59
85
D57
86
D55
87
GND 88
D53
89
D51
90
D49
91
VCC5
92
D47
93
D45
94
GND 95
D43
96
D41
97
D39
98
D37
99
GND 100
D35 101
D33 102
D31 103
D29 104
GND 105
D27 106
D25 107
VCC5 108
D23 109
D21 110
D19 111
GND 112
D17 113
D15 114
D13 115
GND 116
D11 117
VCC5 118
D9 119
D7 120
GND 121
D5 122
1 GND
2 D62
3 D60
4 NC (74B550) / VCC3 (74P550A, 74S55X)
5 D58
6 D56
7 D54
8 GND
9 D52
10 D50
11 D48
12
13
NC
D46
(74B550)
/
VCC3
(74P550A,
74S55X)
14 D44
15 GND
16 D42
17 D40
18 D38
19 D36
20 GND
21 D34
22 D32
23 D30
24 D28
25 GND
26 D26
27 D24
28 NC (74B550) / VCC3 (74P550A, 74S55X)
29 D22
30 D20
31 D18
32 GND
33 D16
34 D14
35 D12
36 GND
37
D10
38
39
NC
D8
(74B550)
/
VCC3
(74P550A,
74S55X)
40 D6
41 GND
42 D4
VCC5 123
D3 124
D1 125
VCC5 126
(74P550A, 74S55X) ADSC / (74B550) ECA4 127
(74P550A, 74S55X) SYNCS0 / (74B550) ECAWE 128
ECDOE 129
(74P550A, 74S55X) WE0 / (74B550) CS0 130
GND 131
(74P550A, 74S55X) WE2 / (74B550) CS2 132
(74P550A, 74S55X) WE4 / (74B550) CS4 133
VCC5 134
(74P550A, 74S55X) WE6 / (74B550) CS6 135
(74P550A, 74S55X) CLK / (74B550) NC 136
GND 137
DIRTYWE 138
(74P550A, 74S55X) A3 / (74B550) NC 139
A5 140
A7 141
GND 142
A9 143
A11 144
A13 145
VCC5 146
A15 147
A17 148
(Reserved A19) NC 149
GND 150
DIRTYI 151
TAG 0 152
VCC5 153
TAG 2 154
TAG 4 155
GND 156
TAG 6 157
PD0 158
PD2 159
VCC5 160
43 NC (74B550) / VCC3 (74P550A, 74S55X)
44 D2
45 D0
46 NC (74B550) / VCC3 (74P550A, 74S55X)
47 OCA4 (74B550) / ADV(74P550A, 74S55X)
48 OCAWE(74B550) / SYNCS1 (74P550A, 74S55X)
49 OCDOE
50 CS1 (74B550) / WE1 (74P550A, 74S55X)
51 GND
52 CS3 (74B550) / WE3 (74P550A, 74S55X)
53 CS5 (74B550) / WE5 (74P550A, 74S55X)
54 NC (74B550) / VCC3 (74P550A, 74S55X)
55 CS7 (74B550) / WE7 (74P550A, 74S55X)
56 HACALE (74B550) / ADSP(74P550A, 74S55X)
57 GND
58 TAGWE
59 NC (74B550) / A4 (74P550A, 74S55X)
60 A6
61 A8
62 GND
63
A10
64
A12
65
A14
66
67
NC
A16
(74B550)
/
VCC3
(74P550A,
74S55X)
68
A18
69 NC (Reserved A20)
70 GND
71 DIRTY O
72 TAG 1
73
NC (74B550) / VCC3 (74P550A, 74S55X)
74 TAG 3
75 TAG 5
76 GND
77 TAG 7
78
PD1
79
PD3
80
NC (74B550) / VCC3 (74P550A, 74S55X)
74b550-4
4
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