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SN74CBT34X245 数据表(PDF) 3 Page - Texas Instruments |
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SN74CBT34X245 数据表(HTML) 3 Page - Texas Instruments |
3 / 7 page SN74CBT34X245 32-BIT FET BUS SWITCH SCDS089C – MAY 1999 – REVISED MAY 2001 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions (see Note 3) MIN MAX UNIT VCC Supply voltage 4 5.5 V VIH High-level control input voltage 2 V VIL Low-level control input voltage 0.8 V TA Operating free-air temperature –40 85 °C NOTE 3: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to TI application report Implications of Slow or Floating CMOS Inputs, literature number SCBA004. 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 II VCC = 5.5 V, VI = 5.5 V or GND ±5 µA Ioff VCC = 0, VI or VO = 0 to 5.5 V 10 µA ICC VCC = 5.5 V, IO = 0, VI = VCC or GND 6 µA ∆ICC‡ Control inputs VCC = 5.5 V, One input at 3.4 V, Other inputs at VCC or GND 3.5 mA Ci Control inputs VI = 3 V or 0 3.5 pF Cio(OFF) VO = 3 V or 0, OE = VCC 5.5 pF § VCC = 4 V, TYP at VCC = 4 V VI = 2.4 V, II = 15 mA 11 17 ron§ VI =0 II = 64 mA 5 7 Ω on VCC = 4.5 V VI = 0 II = 30 mA 5 7 VI = 2.4 V, II = 15 mA 8 13 † All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C. ‡ This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. § Measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages of the two (A or B) terminals. switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4 V VCC = 5 V ± 0.5 V UNIT (INPUT) (OUTPUT) MIN MAX MIN MAX tpd¶ A or B B or A 0.25 ns ten OE A or B 2.2 6.5 1.9 6 ns tdis OE A or B 1.9 6.2 2.2 6.7 ns ¶ The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance). |
类似零件编号 - SN74CBT34X245 |
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类似说明 - SN74CBT34X245 |
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