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HYM368025S-50 Datasheet(PDF) 9 Page - Siemens Semiconductor Group |
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HYM368025S-50 Datasheet(HTML) 9 Page - Siemens Semiconductor Group |
9 / 10 page Semiconductor Group 9 HYM 368025S/GS-50/-60 8M × 36-Bit EDO-Module Notes: 1) All voltages are referenced to V SS. Vil may undershoot to -2.0 V for pulse width of less than or equal to 4 ns. Pulse width is measured at 50% points with amplitude measured peak to the DC reference. 2) I CC1, ICC3, ICC4 and ICC6 depend on cycle rate. 3) I CC1 and ICC4 depend on output loading. Specified values are obtained with the output open. 4) Address can be changed once or less while RAS = Vil. In case of ICC4 it can be changed once or less during a hyper page mode (EDO) cycle. 5) An initial pause of 200 µs is required after power-up followed by 8 RAS cycles of which at least one cycle has to be a refresh cycle, before proper device operation is achieved. In case of using the internal refresh counter, a minimum of 8 CAS-before-RAS initialization cycles instead of 8 RAS cycles are required. 6) AC measurements assume t T = 2 ns. 7) V IH (min.) and VIL (max.) are reference levels for measuring timing of input signals. Transition times are also measured between V IH and VIL. 8) Measured with the specified current load and 100 pF at Vol = 0.8 V and Voh = 2.0 V. Access time is determined by the latter of tRAC, tCAC, tAA,tCPA . tCAC is measured from tristate. . 9) Operation within the t RCD (max.) limit ensures that tRAC (max.) can be met. tRCD (max.) is specified as a reference point only. If t RCD is greater than the specified tRCD (max.) limit, then access time is controlled by tCAC. 10) Operation within the t RAD (max. ) limit ensures that tRAC (max.) can be met. tRAD (max.) is specified as a reference point only. If t RAD is greater than the specified tRAD (max.) limit, then access time is controlled by tAA. 11) Either t RCH or tRRH must be satisfied for a read cycle. 12) t OFF (max.) define the time at which the output achieves the open-circuit conditions and are not referenced to output voltage levels. t OFF is referenced from the rising edge of RAS or CAS, whichever occurs last. 13) t WCS is not a restrictive operating parameter. This is included in the data sheet as electrical characteristics only. If t WCS > tWCS (min.) , the cycle is an early write cycle and data out pin will remain open-circuit (high impedance) through the entire cycle. 14) These parameters are referenced to the CAS leading edge. |
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