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74ALVCHG162280GRG4 데이터시트(PDF) 2 Page - Texas Instruments |
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74ALVCHG162280GRG4 데이터시트(HTML) 2 Page - Texas Instruments |
2 / 13 page www.ti.com DESCRIPTION (CONTINUED) SN74ALVCHG162280 16-BIT TO 32-BIT REGISTERED BUS EXCHANGER WITH BYTE MASKS AND 3-STATE OUTPUTS SCES093D – FEBRUARY 1997 – REVISED OCTOBER 2004 The A-port N-channel output transistors are sized at 450 µm, and the P-channel output transistors are sized at 700 µm. All A-port outputs have equivalent 50-Ω series resistors. The B-port N-channel output transistors are sized at 225 µm, and the P-channel output transistors are sized at 560 µm. All B-port outputs have equivalent 20- Ω series resistors. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. The switching characteristics are based on 25-pF (A port) and 80-pF (B and D ports) loads, but are tested with the standard 50-pF load. The SN74ALVCHG162280 is characterized for operation from 0 °C to 70°C. 2 |
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