Rev. 1.11 - UBiio

More documents

Recommendations

Info

Internet Data Sheet 7.4 ODT AC Electrical Characteristics This chapter describes the ODT AC electrical characteristics. HY[B/I]18T256[40/80/16]0B[C/F](L) 256-Mbit Double-Data-Rate-Two SDRAM TABLE 59 ODT AC Characteristics and Operating Conditions for DDR2-533 and DDR2-400 Symbol Parameter / Condition Values Unit Note Min. Max. t AOND ODT turn-on delay 2 2 t CK t AON ODT turn-on t AC.MIN t AC.MAX + 1 ns ns 1) t AONPD ODT turn-on (Power-Down Modes) t AC.MIN + 2 ns 2 t CK + t AC.MAX + 1 ns ns t AOFD ODT turn-off delay 2.5 2.5 t CK t AOF ODT turn-off t AC.MIN t AC.MAX + 0.6 ns ns t AOFPD ODT turn-off (Power-Down Modes) t AC.MIN + 2 ns 2.5 t CK + t AC.MAX + 1 ns ns 2) t ANPD ODT to Power Down Mode Entry Latency 3 — t CK t AXPD ODT Power Down Exit Latency 8 — t CK 1) 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 when the ODT resistance is fully on. Both are measured from t AOND , which is interpreted differently per speed bin. For DDR2-400/533, t AOND is 10 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 is 12.5 ns (= 2.5 x 5 ns) after the clock edge that registered a first ODT HIGH if t CK = 5 ns. TABLE 60 ODT AC Characteristics and Operating Conditions for DDR2-667 and DDR2-800 Symbol Parameter / Condition Values Unit Note Min. Max. t AOND ODT turn-on delay 2 2 n CK 1) t AON ODT turn-on t AC.MIN t AC.MAX + 0.7 ns ns t AONPD ODT turn-on (Power-Down Modes) t AC.MIN + 2 ns 2 t CK + t AC.MAX + 1 ns ns 1) t AOFD ODT turn-off delay 2.5 2.5 n CK 1) t AOF ODT turn-off t AC.MIN t AC.MAX + 0.6 ns ns t AOFPD ODT turn-off (Power-Down Modes) t AC.MIN + 2 ns 2.5 t CK + t AC.MAX + 1 ns ns 1) t ANPD ODT to Power Down Mode Entry Latency 3 — n CK 1) t AXPD ODT Power Down Exit Latency 8 — n CK 1) 1) New units, “t CK.AVG ” and “n CK ”, are introduced in DDR2-667 and DDR2-800. Unit “t CK.AVG ” represents the actual t CK.AVG of the input clock under operation. Unit “n CK ” represents one clock cycle of the input clock, counting the actual clock edges. Note that in DDR2-400 and DDR2-533, “t CK ” is used for both concepts. Example: t XP = 2 [n CK ] means; if Power Down exit is registered at T m , an Active command may be registered at T m + 2, even if (T m + 2 - T m ) is 2 x t CK.AVG + t ERR.2PER(Min) . 2) 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 when the ODT resistance is fully on. Both are measured from t AOND , which is interpreted differently per speed bin. For DDR2-667/800, t AOND is 2 clock cycles after the clock edge that registered a first ODT HIGH counting the actual input clock edges. 3) 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 , which is interpreted differently per speed bin. For DDR2-667/800, if t CK(avg) = 3 ns is assumed, t AOFD is 1.5 ns (= 0.5 x 3 ns) after the second trailing clock edge counting from the clock edge that registered a first ODT LOW and by counting the actual input clock edges. 1)2) 1)3) Rev. 1.11, 2007-07 62 11172006-LBIU-F1TN
Internet Data Sheet 8 Package Dimensions HY[B/I]18T256[40/80/16]0B[C/F](L) 256-Mbit Double-Data-Rate-Two SDRAM This chapter contains the package dimension figures. FIGURE 11 Package Outline P(G)-TFBGA-60 Notes 1. Drawing according to ISO 8015 2. Dimensions in mm 3. General tolerances +/- 0.15 Rev. 1.11, 2007-07 63 11172006-LBIU-F1TN
Page 1 and 2:
July 2007 HY[B/I]18T256400B[C/F](L)
Page 3 and 4:
Internet Data Sheet HY[B/I]18T256[4
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12: Internet Data Sheet HY[B/I]18T256[4
Page 21 and 22: Internet Data Sheet 3 Functional De
Page 43 and 44: Internet Data Sheet 7 Timing Charac
Page 59 and 60: Internet Data Sheet 7.3 Jitter Defi
Page 61: Internet Data Sheet HY[B/I]18T256[4
Page 65 and 66: Internet Data Sheet 9 Product Nomen
Page 71: Internet Data Sheet Edition 2007-07
show all

Rev. 1.11 - UBiio

Create successful ePaper yourself

Delete template?

Save as template?