74HC640DB,112

Overview

The 74HC640DB,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 2 V to 6 V and supports bidirectional data transfer. It utilizes a 20-pin SSOP package and functions as a high-speed Si-gate CMOS logic circuit.

Feature Summary

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

Applications

• Bidirectional data bus transmission
• Memory interfacing
• Microprocessor systems

Procurement Notes

Verify the specific ordering code 74HC640DB,112 against official NXP documentation to confirm pinout compatibility and electrical specifications. Ensure the SSOP-20 package variant matches the target PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring octal bidirectional data transfer with inverted logic levels. The 3-state outputs allow multiple devices to share a common bus without interference. Verify that the operating voltage range aligns with the system power supply constraints.

Part Context

This part belongs to the 74HC/HCT640 family of high-speed Si-gate CMOS devices. These components are designed to be pin-compatible with low-power Schottky TTL (LSTTL) standards. They comply with JEDEC standard no. 7A for digital integrated circuits.

Replacement Considerations

Compatible substitutes include other 74HC640 variants from different manufacturers such as IN74AC640 or KK74LV640, provided they maintain the same octal 3-state inverting functionality and package dimensions.