SN74AHC573-Q1数据手册TI中文资料规格书

描述 Description

The SN74AHC573 is an octal transparent D-type latch designed for 2-V to 5.5-V VCC operation.\r
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When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is low, the Q outputs are latched at the logic levels of the D inputs.\r
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A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.\r
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OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.\r
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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.

特性 Features

• Qualified for Automotive Applications\r
• Operating Range 2-V to 5.5-V VCC\r
• 3-State Outputs Directly Drive Bus Lines