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H5PS1G63JFRS6C Datasheet(PDF) 14 Page - Hynix Semiconductor |
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H5PS1G63JFRS6C Datasheet(HTML) 14 Page - Hynix Semiconductor |
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14 / 62 page  Rev. 1.7 / Nov. 2011 14 Release H5PS1G63JFR Series 3.3.3 OCD default characteristics Note : 1. Absolute Specifications ( Toper; VDD = +1.8V ±0.1V, VDDQ = +1.8V ±0.1V) 2. Impedance measurement condition for output source dc current: VDDQ=1.7V; VOUT=1420mV; (VOUT- VDDQ)/Ioh must be less than 23.4 ohms for values of VOUT between VDDQ and VDDQ-280mV. Impedance measurement condition for output sink dc current: VDDQ = 1.7V; VOUT = 280mV; VOUT/Iol must be less than 23.4 ohms for values of VOUT between 0V and 280mV. 3. Mismatch is absolute value between pull-up and pull-dn, both are measured at same temperature and voltage. 4. Slew rate measured from vil(ac) to vih(ac). 5. The absolute value of the slew rate as measured from DC to DC is equal to or greater than the slew rate as measured from AC to AC. This is guaranteed by design and characterization. 6. This represents the step size when the OCD is near 18 ohms at nominal conditions across all process corners/variations and represents only the DRAM uncertainty. A 0 ohm value(no calibration) can only be achieved if the OCD impedance is 18 ohms +/- 0.75 ohms under nominal conditions. Output Slew rate load: 7. DRAM output slew rate specification applies to 400, 533 and 667 MT/s speed bins. 8. Timing skew due to DRAM output slew rate mis-match between DQS / DQS and associated DQs is included in tDQSQ and tQHS specification. Description Parameter Min Nom Max Unit Notes Output impedance - - - ohms 1 Output impedance step size for OCD calibration 0 1.5 ohms 6 Pull-up and pull-down mismatch 0 4 ohms 1,2,3 Output slew rate Sout 1.5 - 5 V/ns 1,4,5,6,7,8 VTT 25 ohms Output (Vout) Reference point |
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