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IDT70V16S20PF Datasheet(PDF) 7 Page - Integrated Device Technology |
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IDT70V16S20PF Datasheet(HTML) 7 Page - Integrated Device Technology |
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7 / 18 page  6.42 IDT70V16/5S/L High-Speed 3.3V 16/8K x 9 Dual-Port Static RAM Industrial and Commercial Temperature Ranges 7 ELIMINARY PRELIMINARY AC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range(4) 70V16/5X15 Com'l Only 70V16/5X20 Com'l & Ind 70V16/5X25 Com'l Only Unit Symbol Parameter Min.Max.Min.Max. Min.Max. READ CYCLE tRC Read Cycle Time 15 ____ 20 ____ 25 ____ ns tAA Address Access Time ____ 15 ____ 20 ____ 25 ns tACE Chip Enable Access Time(3) ____ 15 ____ 20 ____ 25 ns tABE Byte Enable Access Time(3) ____ 15 ____ 20 ____ 25 ns tAOE Output Enable Access Time(3) ____ 10 ____ 12 ____ 13 ns tOH Output Hold from Address Change 3 ____ 3 ____ 3 ____ ns tLZ Output Low-Z Time (1,2) 3 ____ 3 ____ 3 ____ ns tHZ Output High-Z Time (1,2) ____ 10 ____ 12 ____ 15 ns tPU Chip Enable to Power Up Time (1,2) 0 ____ 0 ____ 0 ____ ns tPD Chip Disable to Power Down Time (1,2) ____ 15 ____ 20 ____ 25 ns tSOP Semaphore Flag Update Pulse ( OE or SEM)10 ____ 10 ____ 10 ____ ns tSAA Semaphore Address Access(3) ____ 15 ____ 20 ____ 25 ns 5669 tbl 11 tRC R/ W CE ADDR tAA OE 5669 drw 06 (4) tACE (4) tAOE (4) (1) tLZ tOH (2) tHZ (3,4) tBDD DATAOUT BUSYOUT VALID DATA (4) Waveform of Read Cycles(5) NOTES: 1. Timing depends on which signal is asserted last, OE or CE. 2. Timing depends on which signal is de-asserted first, CE or OE. 3. tBDD delay is required only in cases where the opposite port is completing a write operation to the same address location. For simultaneous read operations BUSY has no relation to valid output data. 4. Start of valid data depends on which timing becomes effective last: tAOE, tACE, tAA or tBDD. 5. SEM = VIH. NOTES: 1. Transition is measured 0mV from Low or High-impedance voltage with Output Test Load (Figure 2). 2. This parameter is guaranteed by device characterization, but is not production tested. 3. To access RAM, CE = VIL and SEM = VIH. To access semaphore, CE = VIH and SEM = VIL. 4. 'X' in part number indicates power rating (S or L). |
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