74HCT640D,652

Overview

The NXP USA Inc. 74HCT640D,652 is an octal bus transceiver featuring inverting 3-state outputs compatible with both send and receive directions. It belongs to the high-speed Si-gate CMOS 74HCT series, designed for pin compatibility with low power Schottky TTL (LSTTL). The device complies with JEDEC standard no. 7A specifications.

Feature Summary

• Octal bidirectional bus interface capability
• Inverting 3-state output configuration
• Bus driver output capability

Applications

• Bidirectional data transmission on system buses
• Interface between microprocessors and peripheral devices
• General purpose bus buffering applications

Procurement Notes

Verify current availability status as manufacturing changes may affect supply. Confirm package details match design requirements. Check RoHS compliance documentation for regulatory adherence. Validate datasheet version against latest revision history before finalizing procurement decisions.

Selection Notes

Select this component when requiring an octal transceiver with inverting logic and 3-state control. Ensure voltage levels match HCT series requirements. Consider thermal management for dense PCB layouts. Verify input/output characteristics against connected load specifications.

Part Context

This part is a member of the 74HCT family, which provides TTL-compatible inputs with CMOS performance. It serves as a digital logic buffer within larger integrated circuit systems. The D suffix indicates a surface-mount SOIC package variant suitable for automated assembly processes.

Replacement Considerations

Cross-reference with other 74HCT640 variants from different manufacturers if sourcing constraints exist. Verify electrical parameters and pinout compatibility before substitution.