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IDT70P34L25PFI Datasheet(PDF) 11 Page - Integrated Device Technology |
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IDT70P34L25PFI Datasheet(HTML) 11 Page - Integrated Device Technology |
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11 / 22 page  6.42 IDT70P35/34L (IDT70T25/24L) ADVANCED High-Speed 1.8V 8/4K x 18 (8/4K x 16) Dual-Port Static RAM Industrial and Commercial Temperature Ranges 11 NOTES: 1. Timing depends on which signal is asserted last, OE, CE, LB, or UB. 2. Timing depends on which signal is de-asserted first, CE, OE, LB, or UB. 3. tBDD delay is required only in case where 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 tABE , tAOE, tACE, tAA or tBDD. 5. SEM = VIH. AC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range NOTES: 1. Transition is measured 0mV from Low or High-impedance voltage with Output Test Load (Figure 1). 2. This parameter is guaranteed by device characterization, but is not production tested. 3. To access RAM, CE = VIL, UB or LB = VIL, and SEM = VIH. To access semaphore, CE = VIH or UB & LB = VIH, and SEM = VIL. 70P35/34L20 (70P25/24L20) Com'l Only 70P35/34L25 (70P25/24L25) Com'l & Ind Unit Symbol Parameter Min. Max. Min. Max. READ CYCLE tRC Read Cycle Time 20 ____ 25 ____ ns tAA Address Access Time ____ 20 ____ 25 ns tACE Chip Enable Access Time(3) ____ 20 ____ 25 ns tABE Byte Enable Access Time(3) ____ 20 ____ 25 ns tAOE Output Enable Access Time(3) ____ 12 ____ 13 ns tOH Output Hold from Address Change 3 ____ 3 ____ ns tLZ Output Low-Z Time(1,2) 3 ____ 3 ____ ns tHZ Output High-Z Time(1,2) ____ 12 ____ 15 ns tPU Chip Enable to Power Up Time(1,2) 0 ____ 0 ____ ns tPD Chip Disable to Power Down Time(1,2) ____ 20 ____ 25 ns tSOP Semaphore Flag Update Pulse (OE or SEM)10 ____ 10 ____ ns tSAA Semaphore Address Access(3) ____ 20 ____ 25 ns 5683 tbl 11 Waveform of Read Cycles(5) tRC R/ W CE ADDR tAA OE UB, LB 5683 drw 09 (4) tACE (4) tAOE (4) tABE (4) (1) tLZ tOH (2) tHZ (3,4) tBDD DATAOUT BUSYOUT VALID DATA (4) , |
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