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SN74ABT7820-15PH Arkusz danych(PDF) 11 Page - Texas Instruments |
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SN74ABT7820-15PH Arkusz danych(HTML) 11 Page - Texas Instruments |
11 / 18 page SN74ABT7820 512 × 18 × 2 STROBED BIDIRECTIONAL FIRST-IN, FIRST-OUT MEMORY SCAS206D – AUGUST 1991 – REVISED APRIL 1998 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VIK VCC = 4.5 V, II = – 18 mA –1.2 V VCC = 4.5 V, IOH = – 3 mA 2.5 VOH VCC = 5 V, IOH = – 3 mA 3 V VCC = 4.5 V, IOH = – 12 mA 2 VOL VCC = 4.5 V, IOL = 24 mA 0.55 V II VCC = 5.5 V, VI = VCC or GND ±5 µA IOZH‡ VCC = 5.5 V, VO = 2.7 V 50 µA IOZL‡ VCC = 5.5 V, VO = 0.5 V –50 µA IO§ VCC = 5.5 V, VO = 2.5 V –40 –100 –180 mA Outputs high 15 ICC VCC = 5.5 V, IO = 0, VI = VCC or GND Outputs low 95 mA Outputs disabled 15 Ci Control inputs VI = 2.5 V or 0.5 V 6 pF Co Flags VO = 2.5 V or 0.5 V 4 pF Cio A or B ports VO = 2.5 V or 0.5 V 8 pF † All typical values are at VCC = 5 V, TA = 25°C. ‡ The parameters IOZH and IOZL include the input leakage current. § Not more than one output should be tested at a time, and the duration of the test should not exceed one second. timing requirements over recommended operating free-air temperature range (unless otherwise noted) (see Figures 2 through 4) ’ABT7820-15 ’ABT7820-20 ’ABT7820-25 ’ABT7820-30 UNIT MIN MAX MIN MAX MIN MAX MIN MAX UNIT fclock Clock frequency 67 50 40 33 MHz LDCKA, LDCKB high 4 6 9 11 Pl LDCKA, LDCKB low 4 6 9 11 tw Pulse duration UNCKA, UNCKB high 4 6 9 11 ns duration UNCKA, UNCKB low 4 6 9 11 RSTA, RSTB low 6 8 10 12 A0 – A17 before LDCKA ↑ and B0 – B17 before LDCKB ↑ 3 4 4 4 tsu Setup time PENA before LDCKA ↑ and PENB before LDCKB ↑ 5 5 5 5 ns LDCKA inactive before RSTA high and LDCKB inactive before RSTB high 3 3 4 4 A0 – A17 after LDCKA ↑ and B0 – B17 after LDCKB ↑ 0 0 0 0 th Hold time PENA after LDCKA low and PENB after LDCKB low 2 2 2 2 ns LDCKA inactive after RSTA high and LDCKB inactive after RSTB high 3 3 4 4 |
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