JEDEC Standard No. 309-S0-RCC
-i-
DDR5 SODIMM Raw Card Annex C
Contents
Page
1 Scope ................................................................................................................................................. 1
2 DDR5 Small Outline DIMM Design File ......................................................................................... 1
3 Module Configuration ....................................................................................................................... 1
4 SDRAM Configuration ..................................................................................................................... 2
5 Supported Speeds .............................................................................................................................. 2
6 Design Deviations ............................................................................................................................. 2
7 General Layout .................................................................................................................................. 3
8 Functional Block Diagram ................................................................................................................ 4
9 Sideband Bus Routing ....................................................................................................................... 6
10 Clock Input Net Structure ................................................................................................................. 6
11 Address and Command Net Structure Routing ................................................................................. 7
12 Control Net Structure Routing .......................................................................................................... 9
13 Data Net Structure Routing - DQ, DQS_t, DQS_c, DM_n............................................................... 9
14 DIMM Impedance Profile ............................................................................................................... 11
15 ALERT_n and RESET_n Net Structure Routing ............................................................................ 12
16 Loading and Test Points .................................................................................................................. 13
17 Cross Section Recommendations .................................................................................................... 14
Tables
Table 1 — DDR5 SODIMM Design File ..................................................................................................... 1
Table 2 — Module Configuration ................................................................................................................. 1
Table 3 — SDRAM Configuration ............................................................................................................... 2
Table 4 — Supported Speeds ........................................................................................................................ 2
Table 5 — Design Deviations ....................................................................................................................... 2
Table 6 — Trace Lengths for Host and Local Signals .................................................................................. 6
Table 7 — Trace Lengths for Clock to SDRAM Load Net Structures ......................................................... 7
Table 8 — Trace Lengths for Address and Command Net Structures .......................................................... 8
Table 9 — Trace Lengths for Control Net Structures ................................................................................... 9
Table 10 — Trace Lengths for DQS[7:0]_t, DQS[7:0]_c, DQ[63:0], DM[7:0]_N ..................................... 10
Table 11 — Voltage Operating Conditions ................................................................................................. 11