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LH540202 Datasheet(PDF) 10 Page - Sharp Corporation |
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LH540202 Datasheet(HTML) 10 Page - Sharp Corporation |
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10 / 18 page  AC ELECTRICAL CHARACTERISTICS 1 (Over Operating Range) SYMBOL PARAMETER tA = 15 ns tA = 20 ns tA = 25 ns tA = 35 ns tA = 50 ns UNIT MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX READ CYCLE TIMING tRC Read Cycle Time 25 – 30 – 35 – 45 – 65 – ns tA Access Time – 15 – 20 – 25 – 35 – 50 ns tRR Read Recovery Time 10 – 10 – 10 – 10 – 15 – ns tRPW Read Pulse Width 2 15–20 – 25–35– 50 – ns tRLZ Data Bus Active from Read LOW 3 5– 5–5–5– 5– ns tWLZ Data Bus Active from Write HIGH 3,4 10–10 – 10–10– 10 – ns tDV Data Valid from Read Pulse HIGH 5 – 5–5–5– 5– ns tRHZ Data Bus High-Z from Read HIGH 3 –15 – 15–15–15 – 20 ns WRITE CYCLE TIMING tWC Write Cycle Time 25 – 30 – 35 – 45 – 65 – ns tWPW Write Pulse Width 2 15–20 – 25–35– 50 – ns tWR Write Recovery Time 10 – 10 – 10 – 10 – 15 – ns tDS Data Setup Time 10 – 10 – 10 – 15 – 20 – ns tDH Data Hold Time 0 – 0–0–0– 0– ns RESET TIMING tRSC Reset Cycle Time 25 – 30 – 35 – 45 – 65 – ns tRS Reset Pulse Width 2 15–20 – 25–35– 50 – ns tRSR Reset Recovery Time 10 – 10 – 10 – 10 – 15 – ns tRRSS Read HIGH to RS HIGH 15–20 – 25–35– 50 – ns tWRSS Write HIGH to RS HIGH 15 – 20 – 25 – 35 – 50 – ns RETRANSMIT TIMING 5 tRTC Retransmit Cycle Time 25 – 30 – 35 – 45 – 65 – ns tRT Retransmit Pulse Width 2 15–20 – 25–35– 50 – ns tRTR Retransmit Recovery Time 10 – 10 – 10 – 10 – 15 – ns FLAG TIMING tEFL Reset LOW to Empty Flag LOW – 25 – 30 – 35 – 45 – 65 ns tHFH,FFH Reset LOW to Half-Full and Full Flags HIGH –25 – 30–35–45 – 65 ns tREF Read LOW to Empty Flag LOW – 15 – 20 – 25 – 35 – 45 ns tRFF Read HIGH to Full Flag HIGH – 15 – 20 – 25 – 35 – 45 ns tWEF Write HIGH to Empty Flag HIGH – 15 – 20 – 25 – 35 – 45 ns tWFF Write LOW to Full Flag LOW – 15 – 20 – 25 – 35 – 45 ns tWHF Write LOW to Half-Full Flag LOW – 15 – 20 – 25 – 35 – 45 ns tRHF Read HIGH to Half-Full Flag HIGH –15 – 20–25–35 – 45 ns EXPANSION TIMING tXOL Expansion Out LOW –18 – 20–25–35 – 50 ns tXOH Expansion Out HIGH – 18 – 20 – 25 – 35 – 50 ns tXI Expansion In Pulse Width 15 – 20 – 25 – 35 – 50 – ns tXIR Expansion In Recovery Time 10 – 10 – 10 – 10 – 10 – ns tXIS Expansion in Setup Time 7 – 10 –10–15– 15 – ns NOTES: 1. All timing measurements are performed at ‘AC Test Condition’ levels. 2. Pulse widths less than minimum value are not allowed. LH540202 CMOS 1024 × 9 Asynchronous FIFO 10 |
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