74ACT11139DR

Signal Switches, Multiplexers, Decoders Overview

The SN74ACT11139DR is a dual 2-line to 4-line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature from -40°C to +85°C. The device features active-low enables (1G, 2G) that can function as data lines for demultiplexing. Electrical characteristics include a maximum propagation delay of 8.5 ns at 5.5 V, high-level output current of -24 mA, and low-level output current of 24 mA. Inputs are TTL-voltage compatible with VIH of 2 V and VIL of 0.8 V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Incorporates two independent 2-line to 4-line decoders in a single package
• Features fully buffered inputs representing only one normalized load to the driving circuit
• Active-low enable inputs allow simplified cascading or direct use as data lines in demultiplexing applications
• Center-pin VCC and GND configurations minimize high-speed switching noise

Signal Switches, Multiplexers, Decoders Applications

• High-performance memory decoding systems
• Data routing and transmission systems
• Fully synchronous counting operations
• Demultiplexing applications utilizing enable inputs as data lines

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify component status prior to procurement as the SN74ACT11139DR variant is listed as obsolete in official documentation. Confirm availability of alternative packages such as the SOIC D or TSSOP PW variants which maintain active status. Ensure design reviews account for discontinued manufacturing status to mitigate long-term supply risks.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring short propagation delays and TTL-compatible inputs. Verify that the application environment remains within the specified -40°C to +85°C temperature range. Consider the center-pin power configuration for noise reduction in high-speed layouts. Evaluate alternative active packages if the DR suffix is unavailable.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74ACT logic family, utilizing EPIC (Enhanced-Performance Implanted CMOS) technology. It is designed specifically for high-speed memory decoders and data transmission systems where minimizing system decoding effects is critical. The architecture supports fully synchronous operation suitable for complex digital counting and routing tasks.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The SN74ACT11139DRE4 and SN74ACT11139DRG4 are confirmed equivalent part numbers. The SN74ACT11139PWR is an active alternative in a TSSOP package. Verify pin compatibility and electrical specifications when substituting obsolete DR variants with these confirmed equivalents.