SN74ALS563BDWRG4

Overview

The SN74ALS563BDWRG4 is an octal D-type transparent latch manufactured by Texas Instruments. It belongs to the SN54/74ALS logic family and features inverting outputs with three-state capability. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a propagation delay of 12 ns. It provides a low-level output current of 24 mA and a high-level output current of -12 mA, with a maximum static current of 8 uA. The component is housed in a 20-pin SOIC package and functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Octal configuration providing eight independent D-type transparent latches with inverting outputs.
• Three-state output architecture enabling direct bus connection for efficient data transfer management.
• High-speed ALS technology delivering a propagation delay of 12 ns for rapid signal processing.
• Robust drive capability with a low-level output current of 24 mA suitable for heavy capacitive loads.

Applications

• Parallel-to-serial data conversion circuits requiring temporary storage.
• Bus-oriented memory systems utilizing three-state buffering.
• High-speed digital signal processing applications needing fast latch timing.
• Register banks in industrial control systems operating at standard 5V logic levels.

Procurement Notes

Verify the complete part number SN74ALS563BDWRG4 against official Texas Instruments documentation to confirm the specific suffix designations. Ensure the procurement source provides valid RoHS compliance certificates matching the G4 designation. Cross-reference the datasheet revision history to guarantee the component meets current manufacturing standards and material specifications before finalizing acquisition.

Selection Notes

Select this component when designing systems that require octal latching with inverting functionality and three-state bus isolation. The ALS series offers superior speed compared to standard LS logic while maintaining compatible power consumption profiles. Verify that the application environment stays within the specified -40°C to +85°C temperature range and that the 4.5V to 5.5V supply voltage aligns with the system power architecture.

Part Context

This device is part of the broader SN54/74ALS logic family, which bridges the performance gap between standard TTL and advanced Schottky technologies. It shares functional similarities with other octal latches like the SN74LS573 but provides faster switching speeds. The component serves as a critical interface element in digital systems, facilitating data retention and bus management in complex integrated circuit designs.

Replacement Considerations

Direct replacements include the SN74ALS563DW or SN74ALS563DR. Verify pinout compatibility and electrical characteristics against the original datasheet before substitution.

FAQ

What is the logic polarity of the SN74ALS563BDWRG4?

The device features inverting outputs, meaning the Q output is the logical complement of the D input when the latch is enabled.

Does the SN74ALS563BDWRG4 support bus-driven applications?

Yes, the three-state output architecture allows the device to be connected directly to bus lines without external buffers.