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IDT72021 Datasheet(PDF) 5 Page - Integrated Device Technology |
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IDT72021 Datasheet(HTML) 5 Page - Integrated Device Technology |
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5 / 14 page  5.09 5 MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT72021, IDT72031, IDT72041 CMOS ASYNCHRONOUS FIFO WITH RETRANSMIT 1K x 9, 2K x 9, 4K x 9 AC ELECTRICAL CHARACTERISTICS — IDT72021(1) (Commercial: VCC = 5.0V ±10%, TA = 0°C to +70°C; Military: VCC = 5V±10%, TA = –55°C to +125°C) Com’l Mil. Com’l Mil. Com’l & Mil. 72021L25 72021L30 72021L35 72021L40 72021L50 Symbol Parameter Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Unit fS Shift Frequency — 28.5 — 25 — 22.2 — 20 — 15 MHz tRC R Cycle Time 35 — 40 — 45 — 50 — 65 — ns tA Access Time — 25 — 30 — 35 — 40 — 50 ns tRR R Recovery Time 10 — 10 — 10 — 10 — 15 — ns tRPW R Pulse Width(2) 25 — 30 — 35 — 40 — 50 — ns tRLZ R Pulse LOW to Data Bus at Low-Z(3) 5— 5— 5 — 5— 10 — ns tWLZ W Pulse HIGH to Data Bus at Low-Z(3,4) 5— 5— 5 — 5— 5 — ns tDV Data Valid from R Pulse HIGH 5 — 5 — 5 — 5 — 5 — ns tRHZ R Pulse HIGH to Data Bus at High-Z(3) — 18 — 20 — 20 — 25 — 30 ns tWC W Cycle Time 35 — 40 — 45 — 50 — 65 — ns tWPW W Pulse Width(2) 25 — 30 — 35 — 40 — 50 — ns tWR W Recovery Time 10 — 10 — 10 — 10 — 15 — ns tDS Data Set-up Time 15 — 18 — 18 — 20 — 30 — ns tDH Data Hold Time 0 — 0 — 0 — 0 — 5 — ns tRSC RS Cycle Time 35 — 40 — 45 — 50 — 65 — ns tRS RS Pulse Width(2) 25 — 30 — 35 — 40 — 50 — ns tRSS RS Set-up Time 25 — 30 — 35 — 40 — 50 — ns tRSR RS Recovery Time 10 — 10 — 10 — 10 — 15 — ns tRTC RT Cycle Time 35 — 40 — 45 — 50 — 65 — ns tRT RT Pulse Width(2) 25 — 30 — 35 — 40 — 50 — ns tRTR RT Recovery Time 10 — 10 — 10 — 10 — 15 — ns tRSF1 RS to EF and AEF LOW — 35 — 40 — 45 — 50 — 65 ns tRSF2 RS to HF and FF HIGH — 35 — 40 — 45 — 50 — 65 ns tREF R LOW to EF LOW — 25 — 30 — 30 — 35 — 45 ns tRFF R HIGH to FF HIGH — 25 — 30 — 30 — 35 — 45 ns tRPE R Pulse Width After EF HIGH 25 — 30 — 35 — 40 — 50 — ns tWEF W HIGH to EF HIGH — 25 — 30 — 30 — 35 — 45 ns tWFF W LOW to EF LOW — 25 — 30 — 30 — 35 — 45 ns tWHF W LOW to HF LOW — 35 — 40 — 45 — 50 — 65 ns tRHF R HIGH to HF HIGH — 35 — 40 — 45 — 50 — 65 ns tWPF W Pulse Width after FF HIGH 25 — 30 — 35 — 40 — 50 — ns tRF R HIGH to Transitioning AEF — 35 — 40 — 45 — 50 — 65 ns tWF W LOW to Transitioning AEF — 35 — 40 — 45 — 50 — 65 ns tOEHZ OE HIGH to High-Z (Disable)(3) 0 12 0 15 0 17 0 20 0 25 ns tOELZ OE LOW to Low-Z (Enable)(3) 0 12 0 15 0 17 0 20 0 25 ns tAOE OE LOW Data Valid (Q0–Q8) — 15 — 18 — 20 — 25 — 30 ns NOTES: 2677 tbl 08 1. Timings referenced as in AC Test Conditions. 2. Pulse widths less than minimum value are not allowed. 3. Values guaranteed by design, not currently tested. 4. Only applies to read data flow-through mode. |
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