Texas Instruments SN74ACT563 Octal D-Type Transparent Latches With 3-State Outputs SN74ACT563DW

The SN74ACT563 is an octal D-type transparent latch featuring 3-state outputs, designed for operation within a supply voltage range of 4.5 V to 5.5 V. It is TTL-compatible, allowing input voltages up to 5.5 V. The device exhibits a maximum propagation delay (tpd) of 8.5 ns at 5 V, making it suitable for high-speed applications. When the latch-enable (LE) input is high, the outputs reflect the inverted logic levels of the data inputs. The output-enable (OE) input allows the outputs to be placed in a high-impedance state, facilitating direct bus line driving without additional components. This feature is particularly useful during power-up or power-down scenarios, where OE can be tied to VCC through a pullup resistor to ensure the outputs remain in a high-impedance state. The SN74ACT563 is available in various packages, including the 20-SOIC (DW) package, and operates over a temperature range of -40¬8C to 85¬8C. Its flow-through architecture optimizes PCB layout, making it a practical choice for engineers looking for efficient design solutions in digital circuits.