72 pin ECC SO-DIMM Pinout

[30-pin SIMM] [72-pin SIMM] [72-pin SODIMM] [72-pin ECC SIMM]
[Memory Module Signal Assignments]

72-Pin Memory Module Signal Assignments

Personal Computer Memory Module description, 72 pin SO-DIMM Pin out.
SO-DIMM memory is normally found in portable Computers; Notbooks, Laptops, and Moble Workstations.
SO-DIMM modules are an enhanced version of DIMM modules. 72-pin SO-DIMM's are about half the size as 72-pin DIMM modules.

72-pin SODIMM memory modules have been obsolete for some time now. 72-pin SODIMM memory modules should not be used in new designs.
In fact SIMM memory sticks may no longer be purchased as a new product, used sticks are about the only option.
Refer to the main Computer Memory Modules page for an updated listing of current memory module formats.
After 2005/2006 DDR/DDR2 formats started in mass production.

72-pin ECC SIMM Memory Module
Pin #	Non-Parity	Parity	Signal Description
1	VSS	VSS	Ground
2	DQ0	DQ0	Data 0
3	DQ1	DQ1	Data 1
4	DQ2	DQ2	Data 2
5	DQ3	DQ3	Data 3
6	DQ4	DQ4	Data 4
7	DQ5	DQ5	Data 5
8	DQ6	DQ6	Data 6
9	DQ7	DQ7	Data 7
10	VCC	VCC	+5 VDC
11	PD1	PD1	Presence Detect 1
12	A0	A0	Address 0
13	A1	A1	Address 1
14	A2	A2	Address 2
15	A3	A3	Address 3
16	A4	A4	Address 4
17	A5	A5	Address 5
18	A6	A6	Address 6
19	A10	A10	Address 10
20	n/c	PQ8	Data 8 (Parity 1)
21	DQ9	DQ9	Data 9
22	DQ10	DQ10	Data 10
23	DQ11	DQ11	Data 11
24	DQ12	DQ12	Data 12
25	DQ13	DQ13	Data 13
26	DQ14	DQ14	Data 14
27	DQ15	DQ15	Data 15
28	A7	A7	Address 7
29	A11	A11	Address 11
30	VCC	VCC	+5 VDC
31	A8	A8	Address 8
32	A9	A9	Address 9
33	/RAS3	RAS3	Row Address Strobe 3
34	/RAS2	RAS2	Row Address Strobe 2
35	DQ16	DQ16	Data 16
36	n/c	PQ17	Data 17 (Parity 2)
37	DQ18	DQ18	Data 18
38	DQ19	DQ19	Data 19
39	VSS	VSS	Ground
40	/CAS0	CAS0	Column Address Strobe 0
41	/CAS2	CAS2	Column Address Strobe 2
42	/CAS3	CAS3	Column Address Strobe 3
43	/CAS1	CAS1	Column Address Strobe 1
44	/RAS0	RAS0	Row Address Strobe 0
45	/RAS1	RAS1	Row Address Strobe 1
46	A12	A12	Address 12
47	/WE	WE	Read/Write
48	A13	A13	Address 13
49	DQ20	DQ20	Data 20
50	DQ21	DQ21	Data 21
51	DQ22	DQ22	Data 22
52	DQ23	DQ23	Data 23
53	DQ24	DQ24	Data 24
54	DQ25	DQ25	Data 25
55	n/c	PQ26	Data 26 (Parity 3)
56	DQ27	DQ27	Data 27
57	DQ28	DQ28	Data 28
58	DQ29	DQ29	Data 29
59	DQ31	DQ31	Data 31
60	DQ30	DQ30	Data 30
61	VCC	VCC	+5 VDC
62	DQ32	DQ32	Data 32
63	DQ33	DQ33	Data 33
64	DQ34	DQ34	Data 34
65	n/c	PQ35	Data 35 (Parity 4)
66	PD2	PD2	Presence Detect 2
67	PD3	PD3	Presence Detect 3
68	PD4	PD4	Presence Detect 4
69	PD5	PD5	Presence Detect 1
70	PD6	PD6	Presence Detect 6
71	PD7	PD7	Presence Detect 7
72	VSS	VSS	Ground

The approximate board size. 2.375" x 1.0"
Data width is 32 bits per memory stick.

SIMM: Single Inline Memory Module
SO DIMM: Small Outline Dual Inline Memory Module, normally found in Computer Laptops [Note Books]
FPM:Fast Page Mode: (asynchronous) Obsolete, faster than normal DRAM, used in 386/486 computers.
EDO: Extended Data Out: (asynchronous) A superset of FPM, just faster than FPM.
All 72 pin SODIMMs use either EDO or FPM memory. 72 pin SODIMM modules are obsolete and no longer used.
72 pin SODIMMs have an alignment notch on the bottom left to side.
Additional 72 pin module pinouts
72 pin ECC SIMM pin out
72 pin SIMM pin out

The main Computer Memory Modules information page. For electronic device manufacturers see one of these pages:
Memory IC manufacturers
Memory Module manufacturers
Additional electronic Equipment manufacturers may be found by selecting the OEM Equipment icon below.
Component manufacturers [including memory IC manufacturers] may be found by selecting the Components icon below.
Also refer to an alphabetic listing of Companies that manufacture parts Components, listed in order.

Navigation: Engineering Home > OEM Equipment Vendors > Computer Gear > Memory Modules > Memory Module Pinout > 72 pin SIMM with ECC.


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