74HCT563D,653

Latches Overview

The 74HCT563D,653 is an octal D-type transparent latch manufactured by NXP USA Inc. It features eight independent D-type latches with inverted outputs and three-state capabilities. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a counting rate of up to 45 MHz. It is housed in a 20-SOIC package with a width of 7.50 mm. The component is designed for surface mount installation and functions across a temperature range of -40°C to 125°C.

Latches Feature Summary

• Octal configuration providing eight independent D-type transparent latches
• Three-state output capability for bus-oriented systems
• Inverted outputs for direct logic interfacing
• High-speed operation supporting data rates up to 45 MHz

Latches Applications

• Bus-oriented memory mapping
• Register files for temporary data storage
• Interface circuits between microprocessors and peripheral devices
• Data buffering in digital communication systems

Latches Procurement Notes

Verify the obsolete status of this specific part number before procurement planning. Confirm availability of qualified substitutes such as the CD74HCT563 series if production continuity is required. Ensure that the 20-SOIC footprint matches the target PCB design. Check RoHS3 compliance documentation for environmental regulatory adherence in final assembly.

Latches Selection Notes

Select this component when an octal latch with three-state outputs is required for high-speed digital applications. The HCT technology ensures compatibility with standard TTL logic levels while operating at CMOS speeds. Consider the 20-pin SOIC package constraints and thermal dissipation requirements for the intended operating environment. Verify that the inverted output polarity aligns with the system logic design.

Latches Part Context

This component belongs to the 74HCT logic family, which combines the speed of HCMOS with TTL-compatible input levels. The 74HCT563 specifically provides octal latching functionality. It is distinct from binary counters like the 74HCT163, serving instead as a data storage element. The device is widely used in legacy and modern digital designs requiring parallel data retention.

Latches Replacement Considerations

Public confirmed substitute part numbers include CD74HCT563M and CD74HCT563M96 from Texas Instruments. These alternatives offer compatible pinouts and electrical characteristics. Verify package dimensions and lead configurations to ensure mechanical interchangeability without PCB redesign.