IDT72271 Integrated Device Technology, Inc., IDT72271 Datasheet
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IDT72271
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IDT72271 Summary of contents
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... Integrated Device Technology, Inc. FEATURES: • 16,384 x 9-bit storage capacity (IDT72261) • 32,768 x 9-bit storage capacity (IDT72271) • 10ns read/write cycle time (8ns access time) • Retransmit Capability • Auto power down reduces power consumption • Master Reset clears entire FIFO, Partial Reset clears data, but retains programmable settings • ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 state of the FWFT/SI pin during Master Reset determines the mode in use. The IDT72261/72271 FIFOs have five flag functions, OR (Empty Flag or Output Ready), HF Ready), and (Half-full Flag). The ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 The Retransmit function allows the read pointer to be reset to the first location in the RAM array synchronized to RT RCLK when is LOW. This feature is convenient for ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 PIN DESCRIPTION Symbol Name D –D Data Inputs 0 8 MRS Master Reset PRS Partial Reset RT Retransmit FWFT/SI First Word Fall Through/Serial In WCLK Write Clock WEN Write Enable RCLK Read ...
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... Input High Voltage 2.0 — Commercial Input High Voltage 2.2 — Military Input Low Voltage — — Commercial & Military 10 – +125 C) A IDT72261L IDT72271L Military t = 15, 25ns CLK Typ. Max. Min. Typ. Max. — 1 –10 — 10 — 10 –10 — ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 ELECTRICAL CHARACTERISTICS (Commercial 10 +70 C; Military Symbol Parameter f Clock Cycle Frequency S t Data Access Time A t ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 SIGNAL DESCRIPTIONS: INPUTS: DATA Data inputs for 9-bit wide data. CONTROLS: MRS MRS MASTER RESET ( ) A Master Reset is accomplished whenever the Master ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 When goes LOW, Retransmit Setup is complete; at the same time, the contents of the first location are automatically displayed on the outputs. Since FWFT Mode is selected, the first word ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 SEN SEN SERIAL ENABLE ( ) SEN Serial Enable enable used only for serial programming of the offset registers. The serial programming method must be selected during ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 two pointers operate independently; however, a read and a write should not be performed simultaneously to the offset registers. A Master Reset initializes both pointers to the Empty Offset (LSB) register. A ...
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... PRS will go LOW after 16,384 writes tor the IDT72261 and 32,768 writes to the IDT72271 FWFT Mode, the Input Ready ( goes LOW when memory space is available for writing in data. When there is no longer any free space left, HIGH, inhibiting further write operation reads are ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 FWFT Mode, the Ouput Ready ( OR goes LOW at the same time that the first word written to an empty FIFO appears valid on the outputs. cycle after RCLK shifts ...
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... PRS PAF or ), will go LOW after (16,385-m) writes to the IDT72261, and (32,769-m) writes to the IDT72271. In this case, the first word written to an empty FIFO does not stay in memory, but goes unrequested to the output register; there- fore, it has no effect on determining the state of PAF ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 MRS REN WEN t FWFT FWFT/SI LD (1) RT SEN PAE PAF MILITARY AND COMMERCIAL TEMPERATURE RANGES t RS ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 PRS REN WEN RT SEN PAE PAF RSS RSR t t RSS RSR t RSS ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 CLK t CLKH 1 WCLK WEN FF (1) t SKEW1 RCLK REN NOTES the minimum time between a rising RCLK edge and a ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 RCLK t t ENS REN OLZ OE WCLK WEN NOTES contributes a variable delay to the overall first ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 WCLK first valid write t ENS WEN t FWL1 RCLK EF REN NOTES max. (in ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 WRITE WCLK 1 (1) t SKEW1 WEN RCLK t ENH t ENS REN OE LOW DATA IN OUTPUT REGISTER 0 ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 WCLK t DS DATA WRITE ENH ENS WEN (1) t FWL1 RCLK EF REN OE LOW DATA IN OUTPUT REGISTER ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 WCLK t t ENS ENH SEN t t LDS LDH BIT 0 EMPTY OFFSET (LSB) Figure 11. Serial Loading of Programmable Flag Registers (IDT Standard and FWFT modes) ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 CLK t t CLKH CLKL RCLK t LDS LD t ENS REN DATA IN OUTPUT REGISTER Figure 13. Parallel Read of Programmable Flag Registers (IDT Standard and FWFT ...
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... Figure 15. Programmable Almost Full Flag Timing (IDT Standard and FWFT modes) WCLK WEN HF D/2 words RCLK REN NOTES maximum FIFO depth = 16,384 for IDT72261, 32,768 words for IDT72271. Figure 16. Half - Full Flag Timing (IDT Standard and FWFT modes PAF words in FIFO memory ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 WCLK ENH RTS ENS WEN RCLK t t ENS t ENH RTS REN ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 MILITARY AND COMMERCIAL TEMPERATURE RANGES 25 ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 MILITARY AND COMMERCIAL TEMPERATURE RANGES 26 ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 WCLK ENH RTS ENS WEN RCLK t t ENS t ENH RTS REN ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 OPERATING CONFIGURATIONS SINGLE DEVICE CONFIGURATION A single IDT72261/722171 may be used when the applica- WRITE CLOCK (WCLK) WRITE ENABLE ( FIRST WORD FALL THROUGH/SERIAL INPUT FULL FLAG/INPUT READY ( PROGRAMMABLE ALMOST FULL ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 PRS PARTIAL RESET ( ) MRS MASTER RESET ( ) FIRST WORD FALL THROUGH/ SERIAL INPUT (FWFT/SI) RT RETRANSMIT ( ) DATA IN (Dn) 18 WRITE CLOCK (WCLK) WRITE ENABLE ( LOAD ...
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IDT72261/72271 SyncFIFO 16,384 x 9, 32,768 x 9 where T is the RCLK period and T RCLK the WCLK period, whichever is shorter. The maximum amount of time it takes for a word to pass from the inputs of the ...