SN74ALS563BDWR

Overview

The SN74ALS563BDWR is an octal D-type transparent latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to 70°C. The device features inverting logic, eight input lines, and eight output lines housed in a 20-pin SOIC (DW) package. Electrical characteristics include a low-level output current of 24 mA and a high-level output current of -2.6 mA at VCC = 4.5 V. Propagation delay from data input to output ranges from 3 ns to 18 ns.

Feature Summary

• Features 3-state outputs designed for driving highly capacitive or relatively low-impedance loads directly on bus lines without interface components.
• Transparent latch operation allows Q outputs to follow the complements of D inputs while the latch-enable (LE) input is high.
• Buffered output-enable (OE) input places outputs in normal logic states or high-impedance state without affecting internal latch operations.

Applications

• Implementing buffer registers
• I/O port implementations
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify that the ordering suffix 'W' corresponds to the tape-and-reel packaging format specified in the datasheet. Confirm the component meets the catalog version requirements for the 0°C to 70°C operating temperature range. Ensure compatibility with standard SOIC-20 footprint guidelines provided in the package outline documentation.

Selection Notes

Select this component when designing systems requiring octal latching with tri-state bus interfacing capabilities. The ALS series offers specific drive strengths suitable for low-impedance loads. Consider the inverting logic polarity and the requirement for separate latch-enable and output-enable control signals during system architecture planning.

Part Context

This part belongs to the SN74ALS563B family of octal D-type transparent latches. It is a catalog version of the device, distinct from the military-grade SN54ALS563B variant which supports extended temperature ranges. The BDWR designation indicates the specific SOIC package type combined with reel packaging for automated assembly processes.

Replacement Considerations

SN74ALS563BDW is the tube-packaged equivalent of the same logical device. SN74ALS563BNSR is the SOP package alternative. Verify pinout compatibility and thermal management requirements when substituting between different package types within the same logic family.