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IDT70T15A20BF Datasheet(PDF) 7 Page - Integrated Device Technology |
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IDT70T15A20BF Datasheet(HTML) 7 Page - Integrated Device Technology |
7 / 18 page 6.42 IDT70T16/5L High-Speed 2.5V 16/8K x 9 Dual-Port Static RAM Industrial and Commercial Temperature Ranges 7 PRELIMINARY AC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range 70T16/5L20 Com 'l Only 70T16/5L25 Com 'l & Ind Unit Sym bol Param eter Min. Max. Min. Max. READ CYCLE tRC Re ad Cy c le Tim e 20 ___ _ 25 ___ _ ns tAA Ad d re ss Acce ss Time ___ _ 20 ___ _ 25 ns tACE Chip Enab le Acce ss Time (3) ___ _ 20 ___ _ 25 ns tAB E Byte Enab le Acce ss Time (3) ___ _ 20 ___ _ 25 ns tAOE O utp ut Enab le Acce ss Time (3) ___ _ 12 ___ _ 13 ns tOH O utp ut Ho ld fro m A d d re s s Chang e 3 ___ _ 3 ___ _ ns tLZ O utp ut Lo w-Z Tim e (1,2) 3 ___ _ 3 ___ _ ns tHZ Outp ut Hig h-Z Tim e (1,2) ___ _ 12 ___ _ 15 ns tPU Chip E nab le to P o we r Up Tim e (1,2) 0 ___ _ 0 ___ _ ns tPD Chip Dis ab le to P o we r Do wn Tim e (1,2) ___ _ 20 ___ _ 25 ns tSOP S e mapho re F lag Up date P uls e ( OE or SEM)10 ___ _ 10 ___ _ ns tSAA Se map ho re Ad d re ss Acce ss (3) ___ _ 20 ___ _ 25 ns 5 663 tb l 11 Waveform of Read Cycles(5) tRC R/ W CE ADDR tAA OE 5663 drw 05 (4) tACE (4) tAOE (4) (1) tLZ tOH (2) tHZ (3,4) tBDD DATAOUT BUSYOUT VALID DATA (4) NOTES: 1. Transition is measured 0mV from Low or High-impedance voltage with Output Test Load (Figure1). 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. 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. |
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