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HYB18T512400B2C Scheda tecnica(PDF) 42 Page - Qimonda AG |
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HYB18T512400B2C Scheda tecnica(HTML) 42 Page - Qimonda AG |
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42 / 69 page  Internet Data Sheet Rev. 1.12, 2007-05 42 10062006-YPTZ-CDR7 HY[B/I]18T512[40/80/16]0B2[C/F](L) 512-Mbit Double-Data-Rate-Two SDRAM TABLE 42 Speed Grade Definition Speed Bins for DDR2–667 TABLE 43 Speed Grade Definition Speed Bins for DDR2–533C Speed Grade DDR2–667C DDR2–667D Unit Note QAG Sort Name –3 –3S CAS-RCD-RP latencies 4–4–4 5–5–5 t CK Parameter Symbol Min. Max. Min. Max. — Clock Frequency @ CL = 3 t CK 585 8ns 1)2)3)4) 1) Timings are guaranteed with CK/CK differential Slew Rate of 2.0 V/ns. For DQS signals timings are guaranteed with a differential Slew Rate of 2.0 V/ns in differential strobe mode and a Slew Rate of 1 V/ns in single ended mode. Timings are further guaranteed for normal OCD drive strength (EMRS(1) A1 = 0) under the “Reference Load for Timing Measurements”. 2) The CK/CK input reference level (for timing reference to CK/CK) is the point at which CK and CK cross. The DQS / DQS, RDQS / RDQS, input reference level is the crosspoint when in differential strobe mode; The input reference level for signals other than CK/CK, DQS / DQS, RDQS / RDQS is defined. 3) Inputs are not recognized as valid until V REF stabilizes. During the period before VREF stabilizes, CKE = 0.2 x VDDQ is recognized as low. 4) The output timing reference voltage level is V TT. @ CL = 4 t CK 383.75 8 ns 1)2)3)4) @ CL = 5 t CK 383 8ns 1)2)3)4) Row Active Time t RAS 45 70000 45 70000 ns 1)2)3)4)5) 5) t RAS.MAX is calculated from the maximum amount of time a DDR2 device can operate without a refresh command which is equal to 9 x tREFI. Row Cycle Time t RC 57 — 60 — ns 1)2)3)4) RAS-CAS-Delay t RCD 12 — 15 — ns 1)2)3)4) Row Precharge Time t RP 12 — 15 — ns 1)2)3)4) Speed Grade DDR2–533C Unit Note QAG Sort Name –3.7 CAS-RCD-RP latencies 4–4–4 t CK Parameter Symbol Min. Max. — Clock Frequency @ CL = 3 t CK 58 ns 1)2)3)4) 1) Timings are guaranteed with CK/CK differential Slew Rate of 2.0 V/ns. For DQS signals timings are guaranteed with a differential Slew Rate of 2.0 V/ns in differential strobe mode and a Slew Rate of 1 V/ns in single ended mode. Timings are further guaranteed for normal OCD drive strength (EMRS(1) A1 = 0) under the “Reference Load for Timing Measurements”. 2) The CK/CK input reference level (for timing reference to CK/CK) is the point at which CK and CK cross. The DQS / DQS, RDQS / RDQS, input reference level is the crosspoint when in differential strobe mode; The input reference level for signals other than CK/CK, DQS / DQS, RDQS / RDQS is defined. @ CL = 4 t CK 3.75 8 ns 1)2)3)4) @ CL = 5 t CK 3.75 8 ns 1)2)3)4) Row Active Time t RAS 45 70000 ns 1)2)3)4)5) Row Cycle Time t RC 60 — ns 1)2)3)4) RAS-CAS-Delay t RCD 15 — ns 1)2)3)4) Row Precharge Time t RP 15 — ns 1)2)3)4) |
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