SN74AHCT138RGYR

Signal Switches, Multiplexers, Decoders Overview

The SN74AHCT138RGYR is a 3-line to 8-line decoder/demultiplexer in a VQFN-16 package. It operates on a supply voltage of 1.5V to 5.5V with TTL-compatible inputs. The device features three enable inputs (one active-high, two active-low) and provides eight active-low outputs. Recommended operating conditions specify an operating temperature range of -40°C to +85°C. Electrical characteristics include high-level output current of -8mA and low-level output current of 8mA at 5V. Switching characteristics indicate propagation delays up to 12ns at 50pF load.

Signal Switches, Multiplexers, Decoders Feature Summary

• TTL-voltage compatible inputs for direct interfacing
• Three enable inputs simplify cascading and data reception
• Designed for high-speed memory decoding applications

Signal Switches, Multiplexers, Decoders Applications

• High-performance memory decoding systems
• Data-routing applications requiring short propagation delay
• Cascaded decoder configurations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix matches the required package type and moisture sensitivity level. Confirm RoHS compliance status and lead finish details against the latest Package Option Addendum. Ensure the component meets the specified operating temperature range for the intended environment. Check for any recent documentation updates or revision history changes that may affect pin functions or electrical parameters.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when TTL logic compatibility is required within AHCT speed ranges. The inclusion of multiple enable inputs facilitates complex decoding schemes without external inverters. Consider the VQFN package size constraints and thermal resistance values for PCB layout planning. Verify that the supply voltage range aligns with the system power rails.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SNx4AHCT138 family of 3-line to 8-line decoders. It is available in various packages including SOIC, SSOP, TSSOP, and VQFN. The family supports both standard and military-grade variants, with the SN74 prefix indicating commercial temperature range operation. The device is designed to minimize system decoding effects in high-speed environments.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHCT138DR

Signal Switches, Multiplexers, Decoders FAQ

How many enable inputs does the SN74AHCT138RGYR have?

It has three enable inputs: one active-high (G1) and two active-low (G2A, G2B).

What is the input voltage compatibility of this decoder?

The inputs are TTL-voltage compatible.