74AC138PC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC138PC is a high-speed 1-of-8 decoder/demultiplexer belonging to the 74AC logic family. It accepts three binary weighted address inputs (A0, A1, A2) and provides eight mutually exclusive active-LOW outputs (O0-O7). The device operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature range from -40°C to +85°C. It features multiple input enables for parallel expansion capabilities.

Signal Switches, Multiplexers, Decoders Feature Summary

• Demultiplexing capability allows use as an 8-output demultiplexer by utilizing enable inputs as data or strobe signals.
• Multiple input enables facilitate easy parallel expansion to larger decoding configurations using additional devices.
• Outputs are active-LOW and mutually exclusive, ensuring only one output is active at any given time when enabled.

Signal Switches, Multiplexers, Decoders Applications

• High-speed bipolar memory chip select address decoding
• Parallel expansion to 1-of-24 or 1-of-32 decoders
• System address decoding

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific package type against the datasheet ordering information, as 'PC' is not explicitly listed in the provided table which details SC, SCX, MTCX, and ACT variants. Confirm RoHS compliance status and lead times directly with the manufacturer or authorized distributors, as availability may vary by region and production cycle.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring high-speed decoding with low power consumption compared to older families. Ensure the design accommodates the 2V to 6V supply range. Consider the 74ACT138 if TTL-compatible input thresholds are required for interfacing with legacy logic levels.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74AC138 series of decoders and demultiplexers manufactured by onsemi. It is designed for high-speed applications and offers reduced quiescent current. The series includes variants such as the 74ACT138 for TTL compatibility and different packaging options like SOIC-16 and TSSOP-16.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The 74ACT138SCX is a documented alternative within the same datasheet offering TTL-compatible inputs. Other pin-compatible alternatives include the MC74AC138DR2G and 74AC138SCX, though package types and specific electrical characteristics should be verified against the original design requirements.