74HCT245DB,112

Overview

The 74HCT245DB,112 is an octal bus transceiver manufactured by Nexperia. It features non-inverting 3-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device accepts TTL-level inputs and provides CMOS-level outputs. It includes an output enable (OE) input for high-impedance control and a direction (DIR) input for bidirectional data flow management. The component is housed in a 20-lead SO plastic small outline package (SOT163-1).

Feature Summary

• Octal bidirectional bus interface with non-inverting 3-state outputs.
• TTL-compatible input levels interfacing with CMOS output levels.
• Direction control via DIR pin and high-impedance isolation via OE pin.

Applications

• Bidirectional data transmission on microprocessor buses.
• Isolation between different logic families or voltage domains.
• General-purpose memory and I/O expansion interfaces.

Procurement Notes

Verify the ordering suffix '115' against the datasheet revision history, as it may indicate specific tape-and-reel packaging or regional distribution variants. Confirm that the manufacturer designation aligns with current Nexperia product portfolios rather than legacy NXP branding. Ensure the package type matches the required PCB footprint specifications for the target design.

Selection Notes

Select this component when TTL-to-CMOS level translation is required for an 8-bit wide bus. The HCT series ensures compatibility with standard TTL logic thresholds while maintaining low power consumption typical of CMOS technology. Verify that the operating temperature range meets the environmental requirements of the intended application environment.

Part Context

This part belongs to the 74HCT245 family of octal bus transceivers. It serves as a bridge for data transfer between two 8-bit buses. The device is designed for high-speed applications requiring reliable signal integrity and noise immunity. It is widely used in digital systems where bidirectional communication and voltage level shifting are necessary.

Replacement Considerations

Direct replacements include other 74HCT245 variants from manufacturers such as Texas Instruments or ON Semiconductor, provided they share the same pinout and electrical characteristics. Ensure any substitute supports the 4.5 V to 5.5 V supply range and offers comparable propagation delay and drive strength.