214-Pin Micro-DIMM-DDR2-SDRAM Modules MDIMM DDR2 ... - UBiio

Internet Data SheetHYS64T[32/64]0[0/2]0HM–[3S/3.7/5]–AMicro-DIMM DDR2 SDRAM ModulesTABLE 17ODT AC Character. and Operating Conditions for DDR2-533 & DDR2-400Symbol Parameter / Condition Values Unit NoteMin.Max.t AOND ODT turn-on delay 2 2 t CKt AON ODT turn-on t AC.MIN t AC.MAX + 1 ns nst AONPD ODT turn-on (Power-Down Modes) t AC.MIN + 2 ns 2 t CK + t AC.MAX + 1 ns nst AOFD ODT turn-off delay 2.5 2.5 t CKt AOF ODT turn-off t AC.MIN t AC.MAX + 0.6 ns nst AOFPD ODT turn-off (Power-Down Modes) t AC.MIN + 2 ns 2.5 t CK + t AC.MAX + 1 ns ns1)2)t ANPD ODT to Power Down Mode Entry Latency 3 — t CKt AXPD ODT Power Down Exit Latency 8 — t CK1) ODT turn on time min is when the device leaves high impedance and ODT resistance begins to turn on. ODT turn on time max is whenthe ODT resistance is fully on. Both are measured from t AOND , which is interpreted differently per speed bin. For DDR2-400/533, t AOND is10 ns (= 2 x 5 ns) after the clock edge that registered a first ODT HIGH if t CK = 5 ns.2) ODT turn off time min. is when the device starts to turn off ODT resistance. ODT turn off time max is when the bus is in high impedance.Both are measured from t AOFD . Both are measured from t AOFD , which is interpreted differently per speed bin. For DDR2-400/533, t AOFD is12.5 ns (= 2.5 x 5 ns) after the clock edge that registered a first ODT HIGH if t CK = 5 ns.Rev. 1.11, 2006-11 2703062006-HT1R-Z2PY