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AM3352: DDR3 Vtt regulator

Nomo
Guru 16800 points
Part Number: AM3352
Other Parts Discussed in Thread: TPS51200

Hello,

Must DDR3 termination regulator (e.g. TPS51200) be used for the point-to-point DDR3 topologies (e.g. single x16 DDR3 IC)?
I think that using the termination regulator is not mandatory; because Figure 7-48 in the datasheet shows that case.

Best Regards,

Nomo

  • 0
    TI__Guru**** 393215 points

    Figure 7-48 shows 16-Bit DDR3 interface using one 16-bit DDR3 device without Vtt termination. Neither termination resistors nor regulator are used in this case. However take note of section 7.7.2.3.3.9 comments:

    "Figure 7-48 provides an example DDR3 schematic with a single 16-bit DDR3 memory device that does not have VTT termination on the address and control signals. A typical DDR3 point-to-point topology may provide acceptable signal integrity without VTT termination. System performance should be verified by performing signal integrity analysis using specific PCB design details before implementing this topology."

  • 0 in reply to Biser Gatchev-XID
    Guru 16800 points

    Hello Biser-san,

    Thank you for your reply.

    Everything is clear.

    Best Regards,

    Nomo