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SN74ALVTH16373 데이터시트(PDF) 2 Page - Texas Instruments |
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SN74ALVTH16373 데이터시트(HTML) 2 Page - Texas Instruments |
2 / 10 page SN54ALVTH16373, SN74ALVTH16373 2.5-V/3.3-V 16-BIT TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS SCES067F – JUNE 1996 – REVISED JANUARY 1999 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description (continued) A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without interface or pullup components. OE does not affect internal operations of the latch. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. When VCC is between 0 and 1.2 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.2 V, 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. The SN54ALVTH16373 is characterized for operation over the full military temperature range of –55 °C to 125 °C. The SN74ALVTH16373 is characterized for operation from –40°C to 85°C. FUNCTION TABLE (each 8-bit section) INPUTS OUTPUT OE LE D Q L H H H L HL L L LX Q0 H X X Z |
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