CD74HC245M

Overview

The CD74HC245M is a high-speed CMOS octal bus transceiver manufactured by Texas Instruments. It features three-state outputs and non-inverting logic functionality within the HC series. The device operates on a supply voltage range of 2 V to 6 V, supporting both CMOS and LVTTL input levels. It provides low output drive currents of 6 mA for both high and low states. The component is housed in a 20-pin SOIC package and is designed for surface-mount installation with an operating temperature range extending from -40 °C to +85 °C.

Feature Summary

• Octal bus transceiver architecture providing eight independent data channels
• Three-state outputs allowing direct connection to bus lines
• Non-inverting logic polarity for signal direction control

Applications

• High-speed data transmission systems
• Memory and disk controllers
• Complex mid-range systems

Procurement Notes

Verify the specific datasheet revision, as documentation indicates updates such as the July 2022 release. Confirm that the SOIC-20 package matches the required footprint. Ensure the voltage range of 2 V to 6 V aligns with the target system design. Check RoHS compliance details if environmental regulations apply to the manufacturing process.

Selection Notes

Select this component when an octal bidirectional interface is required with standard HC speed characteristics. It serves as a suitable alternative to AHC or AVCH variants if lower performance thresholds are acceptable. Consider the 6 mA drive capability for load requirements. Verify compatibility with existing logic families using CMOS or LVTTL inputs.

Part Context

This part belongs to the CDx4HC(T)245 family of high-speed CMOS logic devices. It shares functional similarities with other octal bus transceivers like the CD74AC245 but differs in speed and voltage specifications. The M suffix denotes the SOIC package type. It is distinct from the SN74AHC245 series which offers faster propagation delays.

Replacement Considerations

The CD74HC245M96 is a documented variant within the same product family offering identical logical functions.