SN74AC563DW

Latches Overview

The SN74AC563DW is an octal D-type transparent latch with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports input voltages up to 6 V. The device features inverting logic, providing eight parallel data lines with corresponding outputs. Key electrical parameters include a maximum propagation delay of 9 ns at 5 V, high-level output current of -24 mA, and low-level output current of 24 mA. It functions reliably across an operating temperature range of -40°C to +85°C.

Latches Feature Summary

• Octal transparent latching architecture allows direct parallel access for efficient data loading.
• Three-state inverting outputs enable direct bus line driving without external interface components.
• Flow-through pinout design optimizes printed circuit board layout efficiency.

Latches Applications

• Bus-oriented memory mapping
• Register banks in computing systems
• Portable battery-powered equipment

Latches Procurement Notes

Verify the specific ordering suffix to confirm package type and packaging format. Confirm RoHS compliance status and lead finish details via the manufacturer's latest documentation. Ensure the selected variant matches the required thermal management and moisture sensitivity level for the intended assembly process.

Latches Selection Notes

Select this component when designing systems requiring octal data storage with tri-state bus interfacing capabilities. The AC series offers faster switching speeds compared to standard HC variants. Consider the 2 V to 6 V operating range for compatibility with various logic families and power supply architectures.

Latches Part Context

This device belongs to the SN74AC563 family of octal D-type transparent latches. It shares functional similarities with other AC series logic devices but is distinct due to its specific latch-enable control and inverting output configuration. The DW designation indicates a plastic small-outline integrated circuit package suitable for surface-mount applications.

Latches Replacement Considerations

SN74AC563DWE4

Latches FAQ

How does the Output Enable (OE) input affect internal latch operations?

The OE input controls the state of the outputs but does not affect the internal operations of the latches. Data can be retained or entered while the outputs are in the high-impedance state.

What is the behavior of the Q outputs when the Latch Enable (LE) input is low?

When LE is taken low, the Q outputs are latched at the inverse logic levels set up at the D inputs, holding the previous data state regardless of subsequent changes at the data inputs.