74HCT640DB,112

Overview

The 74HCT640DB,112 is an octal bus transceiver manufactured by NXP Semiconductors. It features inverting 3-state outputs compatible with both send and receive directions. The device operates within a supply voltage range of 4.5 V to 5.5 V. It utilizes a 20-pin SSOP package (SOT339-1). The component belongs to the HCT logic series, ensuring TTL-compatible input levels while maintaining CMOS performance characteristics.

Feature Summary

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

Applications

• Bidirectional data bus interfacing
• System memory address decoding
• I/O port expansion

Procurement Notes

Verify the specific manufacturer designation, as documentation references both NXP Semiconductors and Nexperia for this part number. Confirm RoHS compliance status through official datasheets. Ensure the SSOP-20 package matches the required footprint. Check current lifecycle status as availability may vary between distributors.

Selection Notes

Select this component when an octal, inverting, 3-state bus transceiver is required. It is suitable for applications needing bidirectional data flow control. The HCT series ensures compatibility with TTL logic inputs. Verify that the 20-pin SSOP package fits the design constraints.

Part Context

This part belongs to the 74HCT family of high-speed Si-gate CMOS devices. These components are pin-compatible with low power Schottky TTL (LSTTL) standards. The series is designed for general-purpose digital logic applications requiring reliable bus interfacing and signal buffering.

Replacement Considerations

Compatible substitutes include other octal 3-state inverting bus transceivers from the same logic family. Verify pinout and electrical specifications before substitution.