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72V245L10TFG Datasheet(PDF) 2 Page - Integrated Device Technology |
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72V245L10TFG Datasheet(HTML) 2 Page - Integrated Device Technology |
2 / 25 page 2 IDT72V205/72V215/72V225/72V235/72V245 3.3V CMOS SyncFIFOTM 256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18 COMMERCIALANDINDUSTRIAL TEMPERATURERANGES MARCH 2013 PIN CONFIGURATIONS TQFP (PN64-1, order code: PF) STQFP (PP64-1, order code: TF) TOP VIEW DESCRIPTION (CONTINUED) PIN 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Q14 Q13 GND Q12 Q11 VCC Q10 Q9 GND Q8 Q7 Q6 Q5 GND Q4 VCC 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 4294 drw 02 ThesynchronousFIFOshavetwofixedflags,EmptyFlag/OutputReady (EF/OR) and Full Flag/Input Ready (FF/IR), and two programmable flags, Almost-Empty (PAE) and Almost-Full (PAF). The offset loading of the programmableflagsiscontrolledbyasimplestatemachine,andisinitiatedby asserting the Load pin (LD). A Half-Full flag (HF) is available when the FIFO is used in a single device configuration. Therearetwopossibletimingmodesofoperationwiththesedevices:IDT Standard mode and First Word Fall-Through (FWFT) mode. InIDTStandardMode,thefirstwordwrittentoanemptyFIFOwillnotappear onthedataoutputlinesunlessaspecificreadoperationisperformed.Aread operation,whichconsistsofactivatingRENandenablingarisingRCLKedge, willshiftthewordfrominternalmemorytothedataoutputlines. In FWFT mode, the first word written to an empty FIFO is clocked directly tothedataoutputlinesafter threetransitionsoftheRCLKsignal.ARENdoes not have to be asserted for accessing the first word. These devices are depth expandable using a Daisy-Chain technique or FirstWordFallThroughmode(FWFT).TheXIandXOpinsareusedtoexpand the FIFOs. In depth expansion configuration, First Load (FL) is grounded on the first device and set to HIGH for all other devices in the Daisy Chain. The IDT72V205/72V215/72V225/72V235/72V245 are fabricated using high-speedsubmicronCMOStechnology. |
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