72 Pin Simm Modules
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72 pin SIMM modules are obsolete and no longer used. SIMM modules were replaced by DIMM memory modules. The pinout for 72 pin SIMM memory is listed in the table below. 72-pin memory modules have been obsolete for some time now. 72-pin memory modules should not be used in new designs. Refer to the main Computer Memory Modules page for an updated listing of current memory module formats. DDR/DDR2 formats are in mass production.
Single Inline Memory Module [SIMM] Pin 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
Non-Parity VSS DQ0 DQ16 DQ1 DQ17 DQ2 DQ18 DQ3 DQ19 VCC n/c A0 A1 A2 A3 A4 A5 A6 A10 DQ4 DQ20 DQ5 DQ21 DQ6 DQ22 DQ7 DQ23 A7
Parity VSS DQ0 DQ16 DQ1 DQ17 DQ2 DQ18 DQ3 DQ19 VCC n/c A0 A1 A2 A3 A4 A5 A6 A10 DQ4 DQ20 DQ5 DQ21 DQ6 DQ22 DQ7 DQ23 A7
72 PIN SIMM Description Ground Data 0 Data 16 Data 1 Data 17 Data 2 Data 18 Data 3 Data 19 +5 VDC Not connected Address 0 Address 1 Address 2 Address 3 Address 4 Address 5 Address 6 Address 10 Data 4 Data 20 Data 5 Data 21 Data 6 Data 22 Data 7 Data 23 Address 7
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
A11 VCC A8 A9 /RAS3 /RAS2 n/c n/c n/c n/c VSS /CAS0 /CAS2 /CAS3 /CAS1 /RAS0 /RAS1 n/c /WE n/c DQ8 DQ24 DQ9 DQ25 DQ10 DQ26 DQ11 DQ27 DQ12 DQ28 VCC DQ29 DQ13 DQ30 DQ14 DQ31 DQ15 n/c PD1 PD2 PD3 PD4 n/c VSS
A11 VCC A8 A9 /RAS3 /RAS2 PQ3 PQ1 PQ2 PQ4 VSS /CAS0 /CAS2 /CAS3 /CAS1 /RAS0 /RAS1 n/c /WE n/c DQ8 DQ24 DQ9 DQ25 DQ10 DQ26 DQ11 DQ27 DQ12 DQ28 VCC DQ29 DQ13 DQ30 DQ14 DQ31 DQ15 n/c PD1 PD2 PD3 PD4 n/c VSS
Address 11 +5 VDC Address 8 Address 9 Row Address Strobe 3 Row Address Strobe 2 Parity bit 3 (for the 3rd byte, bits 16-23) Parity bit 1 (for the 1st byte, bits 0-7) Parity bit 2 (for the 2nd byte, bits 8-15) Parity bit 4 (for the 4th byte, bits 24-31) Ground Column Address Strobe 0 Column Address Strobe 2 Column Address Strobe 3 Column Address Strobe 1 Row Address Strobe 0 Row Address Strobe 1 Not connected Read/Write Not connected Data 8 Data 24 Data 9 Data 25 Data 10 Data 26 Data 11 Data 27 Data 12 Data 28 +5 VDC Data 29 Data 13 Data 30 Data 14 Data 31 Data 15 Not connected Presence Detect 1 Presence Detect 2 Presence Detect 3 Presence Detect 4 Not connected Ground
SIMM Size PD2 PD1 Size GND GND 4 or 64 MB GND NC 2 or 32 MB NC GND 1 or 16 MB NC NC 8 MB SIMM Access time PD4 PD3 Access time GND GND 50, 100 ns GND NC 80 ns NC GND 70 ns NC NC 60 ns The edge connector pin-outs for the 72 PIN SIMM [Single Inline Memory Module] is listed in the table above. The follow up tables provide the size and access times. Notes: A9 is a N/C on 256k and 512k modules. A10 is a N/C on 256k, 512k, 1M and 4M modules. RAS1/RAS3 are N/C on 256k, 1M and 4M modules. Data width is 32 bits per memory stick [the front 72 pins and back 72 fingers on the card are connected together]
The approximate board size. 4.25" x 1.0" SIMM: Single Inline Memory Module. SIMM's have pins on the front and back of the card, but they are connected together. DRAM: Dynamic Random Access Memory 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 SIMMs use either EDO or FPM memory. 72 pin SIMM modules are obsolete and no longer used. 72 pin SIMMs have an alignment notch on the bottom left to side, and a notch in the center of the PWB. Additional 72 pin module pinouts 72 pin ECC SIMM pin out {This web site} 72 pin SO DIMM pin out {This web site} Back to 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, or component manufacturers may be found by selecting the Components icon below. Electronic Engineering Key words: 72 pin ECC SIMM Pinout, Pin-Out, Pin Outs, DIMM: Dual Inline Memory Module, Electrical Standard, DRAM: Dynamic Random Access Memory, Interface Standard, Specification, Spec, Electrical Interface, Semiconductor IC manufacturers, Physical Interface, Engineering Description, electrical
characteristics, Pin descriptions, Component Manufacturers, Vendors, Signal Names, Connector, Computer, 2row, Computer Bus, Descriptions, Signal Names, Obsolete, No longer in production, out-dated, replaced, Obsoleted, Out of production.
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www.interfacebus.com
72 pin SIMM modules are obsolete and no longer used. SIMM modules were replaced by DIMM memory modules. The pinout for 72 pin SIMM memory is listed in the table below. 72-pin memory modules have been obsolete for some time now. 72-pin memory modules should not be used in new designs. Refer to the main Computer Memory Modules page for an updated listing of current memory module formats. DDR/DDR2 formats are in mass production.
Single Inline Memory Module [SIMM] Pin 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
Non-Parity VSS DQ0 DQ16 DQ1 DQ17 DQ2 DQ18 DQ3 DQ19 VCC n/c A0 A1 A2 A3 A4 A5 A6 A10 DQ4 DQ20 DQ5 DQ21 DQ6 DQ22 DQ7 DQ23 A7
Parity VSS DQ0 DQ16 DQ1 DQ17 DQ2 DQ18 DQ3 DQ19 VCC n/c A0 A1 A2 A3 A4 A5 A6 A10 DQ4 DQ20 DQ5 DQ21 DQ6 DQ22 DQ7 DQ23 A7
72 PIN SIMM Description Ground Data 0 Data 16 Data 1 Data 17 Data 2 Data 18 Data 3 Data 19 +5 VDC Not connected Address 0 Address 1 Address 2 Address 3 Address 4 Address 5 Address 6 Address 10 Data 4 Data 20 Data 5 Data 21 Data 6 Data 22 Data 7 Data 23 Address 7
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
A11 VCC A8 A9 /RAS3 /RAS2 n/c n/c n/c n/c VSS /CAS0 /CAS2 /CAS3 /CAS1 /RAS0 /RAS1 n/c /WE n/c DQ8 DQ24 DQ9 DQ25 DQ10 DQ26 DQ11 DQ27 DQ12 DQ28 VCC DQ29 DQ13 DQ30 DQ14 DQ31 DQ15 n/c PD1 PD2 PD3 PD4 n/c VSS
A11 VCC A8 A9 /RAS3 /RAS2 PQ3 PQ1 PQ2 PQ4 VSS /CAS0 /CAS2 /CAS3 /CAS1 /RAS0 /RAS1 n/c /WE n/c DQ8 DQ24 DQ9 DQ25 DQ10 DQ26 DQ11 DQ27 DQ12 DQ28 VCC DQ29 DQ13 DQ30 DQ14 DQ31 DQ15 n/c PD1 PD2 PD3 PD4 n/c VSS
Address 11 +5 VDC Address 8 Address 9 Row Address Strobe 3 Row Address Strobe 2 Parity bit 3 (for the 3rd byte, bits 16-23) Parity bit 1 (for the 1st byte, bits 0-7) Parity bit 2 (for the 2nd byte, bits 8-15) Parity bit 4 (for the 4th byte, bits 24-31) Ground Column Address Strobe 0 Column Address Strobe 2 Column Address Strobe 3 Column Address Strobe 1 Row Address Strobe 0 Row Address Strobe 1 Not connected Read/Write Not connected Data 8 Data 24 Data 9 Data 25 Data 10 Data 26 Data 11 Data 27 Data 12 Data 28 +5 VDC Data 29 Data 13 Data 30 Data 14 Data 31 Data 15 Not connected Presence Detect 1 Presence Detect 2 Presence Detect 3 Presence Detect 4 Not connected Ground
SIMM Size PD2 PD1 Size GND GND 4 or 64 MB GND NC 2 or 32 MB NC GND 1 or 16 MB NC NC 8 MB SIMM Access time PD4 PD3 Access time GND GND 50, 100 ns GND NC 80 ns NC GND 70 ns NC NC 60 ns The edge connector pin-outs for the 72 PIN SIMM [Single Inline Memory Module] is listed in the table above. The follow up tables provide the size and access times. Notes: A9 is a N/C on 256k and 512k modules. A10 is a N/C on 256k, 512k, 1M and 4M modules. RAS1/RAS3 are N/C on 256k, 1M and 4M modules. Data width is 32 bits per memory stick [the front 72 pins and back 72 fingers on the card are connected together]
The approximate board size. 4.25" x 1.0" SIMM: Single Inline Memory Module. SIMM's have pins on the front and back of the card, but they are connected together. DRAM: Dynamic Random Access Memory 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 SIMMs use either EDO or FPM memory. 72 pin SIMM modules are obsolete and no longer used. 72 pin SIMMs have an alignment notch on the bottom left to side, and a notch in the center of the PWB. Additional 72 pin module pinouts 72 pin ECC SIMM pin out {This web site} 72 pin SO DIMM pin out {This web site} Back to 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, or component manufacturers may be found by selecting the Components icon below. Electronic Engineering Key words: 72 pin ECC SIMM Pinout, Pin-Out, Pin Outs, DIMM: Dual Inline Memory Module, Electrical Standard, DRAM: Dynamic Random Access Memory, Interface Standard, Specification, Spec, Electrical Interface, Semiconductor IC manufacturers, Physical Interface, Engineering Description, electrical
characteristics, Pin descriptions, Component Manufacturers, Vendors, Signal Names, Connector, Computer, 2row, Computer Bus, Descriptions, Signal Names, Obsolete, No longer in production, out-dated, replaced, Obsoleted, Out of production.
