74VHC139TTR

Signal Switches, Multiplexers, Decoders Overview

The 74VHC139TTR is an advanced high-speed CMOS dual 2-to-4 line decoder/demultiplexer fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 2 V to 5.5 V, featuring low power dissipation with a maximum quiescent current of 4 µA at 25°C. The device provides symmetrical output impedance with minimum drive currents of 8 mA for both high and low states. It includes power-down protection on all inputs, allowing 0 to 7 V acceptance regardless of the supply voltage. The component offers improved latch-up immunity and 2 kV ESD protection.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2-to-4 decoding or demultiplexing functionality
• Active low enable inputs for gating or data input control
• Power-down protection enabling safe input voltage handling above supply levels
• High noise immunity with defined threshold voltages relative to supply

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in memory systems
• Demultiplexing data streams
• Gating logic control circuits
• Interface conversion between 5 V and 3 V logic domains

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the ordering suffix 'TTR' corresponds specifically to the TSSOP-16 package configuration as documented in the manufacturer's order codes table. Confirm the revision history matches the required datasheet version, as specifications are subject to change without notice. Ensure compliance with RoHS directives if applicable to the manufacturing batch. Cross-reference the specific part number against the official STMicroelectronics catalog to validate current production status and availability constraints.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding channels are required within a single integrated circuit. The wide operating voltage range supports compatibility with various logic families. Consider the TSSOP-16 surface mount package for space-constrained designs. Evaluate the propagation delay characteristics against system timing requirements, noting variations based on load capacitance and supply voltage conditions specified in the AC electrical characteristics tables.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the 74VHC series of advanced high-speed CMOS logic components manufactured by STMicroelectronics. It maintains pin and function compatibility with standard 74 series 139 devices while offering enhanced performance metrics such as reduced propagation delay and lower power consumption. The technology utilizes sub-micron fabrication processes to achieve high speed and improved noise immunity compared to legacy equivalents.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct replacements must match the dual 2-to-4 decoder/demultiplexer architecture and TSSOP-16 package. Verify that alternative sources provide equivalent DC and AC electrical characteristics, particularly regarding output drive strength and propagation delays under identical test conditions.