184 pin RDRAM RIMM Edge Pinout

Personal Computer Memory Module description, 184-pin RDIMM Pin out.
The 184-pin DIMM have 94 pins per PWB side, on each face of the DIMM.

The pinout [signal assignments] for the 184-pin RDIMM is provided in the table below.

**184-Pin RDRAM DIMM PinOut**
Pad #	Signal name	Pad #	Signal name	Pad #	Signal name	Pad #	Signal name
A1	Gnd	B1	Gnd	A47	NC	B47	NC
A2	LDQA8	B2	LDQA7	NC	NC	B48	NC
A3	Gnd	B3	Gnd	NC	NC	B49	NC
A4	LDQA6	B4	LDQA5	NC	NC	B50	NC
A5	Gnd	B5	Gnd	A51	Vref	B51	Vref
A6	LDQA4	B6	LDQA3	A52	Gnd	B52	Gnd
A7	Gnd	B7	Gnd	A53	SCL	B53	SA0
A8	LDQA2	B8	LDQA1	A54	Vdd	B54	Vdd
A9	Gnd	B9	Gnd	A55	SDA	B55	SA1
A10	LDQA0	B10	LCFM	A56	SVdd	B56	SVdd
A11	Gnd	B11	Gnd	A57	SWP	B57	SA2
A12	LCTMN	B12	LCFMN	A58	Vdd	B58	Vdd
A13	Gnd	B13	Gnd	A59	RSCK	B59	RCMD
A14	LCTM	B14	NC	A60	Gnd	B60	Gnd
A15	Gnd	B15	Gnd	A61	RDQB7	B61	RDQB8
A16	NC	B16	LROW2	A62	Gnd	B62	Gnd
A17	Gnd	B17	Gnd	A63	RDQB5	B63	RDQB6
A18	LROW1	B18	LROW0	A64	Gnd	B64	Gnd
A19	Gnd	B19	Gnd	A65	RDQB3	B65	RDQB4
A20	LCOL4	B20	LCOL3	A66	Gnd	B66	Gnd
A21	Gnd	B21	Gnd	A67	RDQB1	B67	RDQB2
A22	LCOL2	B22	LCOL1	A68	Gnd	B68	Gnd
A23	Gnd	B23	Gnd	A69	RCOL0	B69	RDQB0
A24	LCOL0	B24	LDQB0	A70	Gnd	B70	Gnd
A25	Gnd	B25	Gnd	A71	RCOL2	B71	RCOL1
A26	LDQB1	B26	LDQB2	A72	Gnd	B72	Gnd
A27	Gnd	B27	Gnd	A73	RCOL4	B73	RCOL3
A28	LDQB3	B28	LDQB4	A74	Gnd	B74	Gnd
A29	Gnd	B29	Gnd	A75	RROW1	B75	RROW0
A30	LDQB5	B30	LDQB6	A76	Gnd	B76	Gnd
A31	Gnd	B31	Gnd	A77	NC	B77	RROW2
A32	LDQB7	B32	LDQB8	A78	Gnd	B78	Gnd
A33	Gnd	B33	Gnd	A79	RCTM	B79	NC
A34	LSCK	B34	LCMD	A80	Gnd	B80	Gnd
A35	Vcmos	B35	Vcmos	A81	RCTMN	B81	RCFMN
A36	SOUT	B36	SIN	A82	Gnd	B82	Gnd
A37	Vcmos	B37	Vcmos	A83	RDQA0	B83	RCFM
A38	NC	B38	NC	A84	Gnd	B84	Gnd
A39	Gnd	B39	Gnd	A85	RDQA2	B85	RDQA1
A40	NC	B40	NC	A86	Gnd	B86	Gnd
A41	Vdd	B41	Vdd	A87	RDQA4	B87	RDQA3
A42	Vdd	B42	Vdd	A88	Gnd	B88	Gnd
A43	NC	B43	NC	A89	RDQA6	B89	RDQA5
A44	NC	B44	NC	A90	Gnd	B90	Gnd
A45	NC	B45	NC	A91	RDQA8	B91	RDQA7
A46	NC	B46	NC	A92	Gnd	B92	Gnd

The approximate board size. 5.25" x 1.375" x 0.05 [133.35mm x 34.93mm x 1.27mm]

Note the pins labeled NC; mean No connection, so no traces need to run to those pins, freeing up board space.

SIMM: Single Inline Memory Module
DRAM: Dynamic Random Access Memory
SO DIMM: Small Outline Dual Inline Memory Module
SDRAM:: Synchronous DRAM (Random Access Memory), Synchronous to Positive Clock Edge.
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.

Return to the main Computer Memory Modules information page. For electronic device manufacturers see one of these pages:
Memory IC manufacturers
Memory Module manufacturers
Memory Module Acronyms
IC Memory Acronyms
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.

Editor note, I have not looked for any vendors producing this RDRAM DIMM,
So there may be manufacturers still making this style of Dual Inline Memory Module.
However I need to point out that this type of DIMM is Out-of-Date, and possibly obsolete.
Being Out-of-Date does not change the fact that the Rambus Pinout, Signal names and pin descriptions are still valid.

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