SN74HC563DW

Overview

The SN74HC563DW is an octal transparent D-type latch with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features high-current outputs capable of driving bus lines directly or up to 15 LSTTL loads. The device provides low power consumption with a maximum ICC of 80 μA and typical propagation delay of 21 ns. It utilizes a 20-pin Small Outline Integrated Circuit (SOIC) package.

Feature Summary

• Features three-state outputs designed for driving highly capacitive or low-impedance loads
• Provides wide operating voltage range from 2 V to 6 V
• Includes low input current characteristics with a maximum of 1 μA

Applications

• Buffer registers
• I/O ports
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific ordering suffix, as the base part number SN74HC563DW may be obsolete while variants like SN74HC563DWR remain active. Confirm RoHS compliance and lead finish specifications such as NIPDAU during procurement. Ensure the selected package matches the required thermal and mechanical constraints for the target application environment.

Selection Notes

Select this component when designing systems requiring octal data storage with direct bus interfacing capabilities. The HC logic family offers compatibility with standard CMOS interfaces. Consider the 20-pin SOIC package dimensions and thermal resistance values when planning the printed circuit board layout and heat dissipation strategy for the design.

Part Context

This device belongs to the SNx4HC563 series of octal transparent D-type latches. It shares functional similarities with other devices in the HC logic family but is distinguished by its specific pinout and three-state output configuration. The DW designation indicates the 20-pin SOIC package format used for surface-mount assembly.

Replacement Considerations

SN74HC563DWR

FAQ

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

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

What is the recommended method for handling unused inputs on this device?

All unused inputs must be connected to either VCC or GND to prevent undefined operational states caused by floating voltages.