MC74ACT138DR2G-Q

Overview

The MC74ACT138DR2G-Q is a high-speed 1-of-8 decoder/demultiplexer from the 74ACT logic series, manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an ambient operating temperature range of -40°C to +85°C. The device features three binary weighted address inputs (A0-A2) and eight mutually exclusive active-LOW outputs (O0-O7). It includes multiple input enables for parallel expansion capabilities.

Feature Summary

• Features TTL-compatible inputs for direct interface with standard logic families
• Provides demultiplexing capability using enable inputs as data strobes
• Supports easy parallel expansion to larger decoding configurations

Applications

• High-speed bipolar memory chip select address decoding
• Demultiplexing applications utilizing enable inputs as data paths
• Parallel expansion systems requiring 1-of-24 or 1-of-32 decoding

Procurement Notes

Verify that the '-Q' suffix indicates AEC-Q100 qualification and PPAP capability, which are specific to automotive and controlled manufacturing environments. Confirm the package type matches the required SOIC-16 form factor. Ensure the ordering information aligns with the specific site and control change requirements mandated by the unique suffix designation.

Selection Notes

Select this component when TTL-compatible inputs are required alongside AC speed performance. The device is suitable for designs needing active-LOW outputs with 24 mA source/sink current capabilities. Consider the multiple enable inputs if system architecture requires complex gating or expansion into larger decoder networks without additional external logic gates.

Part Context

This part belongs to the MC74AC/ACT138 family of decoders. The 'ACT' designation specifically denotes TTL-compatible input thresholds, distinguishing it from the standard AC series. The '-Q' suffix differentiates it from commercial variants by enforcing stricter automotive quality standards and manufacturing controls.

Replacement Considerations

MC74ACT138DR2G

FAQ

What is the function of the '-Q' suffix in this part number?

The '-Q' suffix indicates that the device is AEC-Q100 qualified and PPAP capable, intended for automotive and other applications requiring unique site and control change requirements.

How does the MC74ACT138 handle input compatibility?

As an ACT device, it features TTL-compatible inputs, allowing it to interface directly with standard TTL logic families while maintaining AC speed performance.