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EBD52UC8AMFA-6B Datasheet(PDF) 11 Page - Elpida Memory |
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EBD52UC8AMFA-6B Datasheet(HTML) 11 Page - Elpida Memory |
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11 / 18 page  EBD52UC8AMFA Preliminary Data Sheet E0454E10 (Ver. 1.0) 11 Pin Capacitance (TA = 25°C, VDD = 2.5V ± 0.2V) Parameter Symbol Pins max. Unit Notes Input capacitance CI1 Address, /RAS, /CAS, /WE, /CS, CKE 120 pF Input capacitance CI2 CK, /CK 85 pF Data and DQS input/output capacitance CO DQ, DQS 20 pF AC Characteristics (TA = 0 to +70 °°°°C, VDD, VDDQ = 2.5V ± 0.2V, VSS = 0V) (DDR SDRAM Component Specification) Parameter Symbol min. max. Unit Notes Clock cycle time (CL = 2) tCK 7.5 12 ns 10 (CL = 2.5) tCK 6 12 ns CK high-level width tCH 0.45 0.55 tCK CK low-level width tCL 0.45 0.55 tCK CK half period tHP min (tCH, tCL) — tCK DQ output access time from CK, /CK tAC –0.7 0.7 ns 2, 11 DQS output access time from CK, /CK tDQSCK –0.6 0.6 ns 2, 11 DQS to DQ skew tDQSQ — 0.45 ns 3 DQ/DQS output hold time from DQS tQH tHP – tQHS — ns Data hold skew factor tQHS — 0.55 ns Data-out high-impedance time from CK, /CK tHZ –0.7 0.7 ns 5, 11 Data-out low-impedance time from CK, /CK tLZ –0.7 0.7 ns 6, 11 Read preamble tRPRE 0.9 1.1 tCK Read postamble tRPST 0.4 0.6 tCK DQ and DM input setup time tDS 0.45 — ns 8 DQ and DM input hold time tDH 0.45 — ns 8 DQ and DM input pulse width tDIPW 1.75 — ns 7 Write preamble setup time tWPRES 0 — ns Write preamble tWPRE 0.25 — tCK Write postamble tWPST 0.4 0.6 tCK 9 Write command to first DQS latching transition tDQSS 0.75 1.25 tCK DQS falling edge to CK setup time tDSS 0.2 — tCK DQS falling edge hold time from CK tDSH 0.2 — tCK DQS input high pulse width tDQSH 0.35 — tCK DQS input low pulse width tDQSL 0.35 — tCK Address and control input setup time tIS 0.75 — ns 8 Address and control input hold time tIH 0.75 — ns 8 Address and control input pulse width tIPW 2.2 — ns 7 Mode register set command cycle time tMRD 2 — tCK Active to Precharge command period tRAS 42 120000 ns Active to Active/Auto refresh command period tRC 60 — ns Auto refresh to Active/Auto refresh command period tRFC 72 — ns |
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