SN7406DR

Overview

The SN7406DR is a hex inverter buffer and line driver manufactured by Texas Instruments. It belongs to the standard 7400 logic series and utilizes bipolar technology. The device features six independent input lines and six corresponding output lines configured as open-collector inverters. It operates within a supply voltage range of 4.75 V to 5.25 V, with a typical propagation delay of 23 ns at 5 V. The component supports low-level output currents up to 40 mA and high-level leakage currents of -250 uA. It is housed in a surface-mount SOIC-14 package and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Hex inverting configuration providing six independent signal inversion channels
• Open-collector output architecture enabling flexible interfacing with various load types
• High low-level sink current capability suitable for driving external circuits
• Standard bipolar logic construction ensuring compatibility with classic digital systems

Applications

• High-voltage interface buffering between low-voltage logic and higher voltage loads
• Driving relay coils or indicator lamps requiring significant current sinking
• General-purpose signal inversion in digital control circuits
• Line termination and impedance matching in communication interfaces

Procurement Notes

Verify the specific suffix 'DR' corresponds to the SOIC-14 surface mount package and tape-and-reel delivery format. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure design margins account for the specified bipolar power consumption and thermal dissipation requirements within the stated operating temperature range.

Selection Notes

Select this component when open-collector outputs are required for driving non-standard logic levels or heavy loads. The bipolar technology offers robust drive strength compared to CMOS alternatives but consumes more static power. Verify that the system voltage remains strictly within the 4.75 V to 5.25 V limits to prevent device damage or malfunction.

Part Context

This part is a member of the Texas Instruments SN7406 family, which provides hex inverting buffers with open-collector outputs. It serves as a fundamental building block in digital electronics for signal conditioning and level shifting. The DR variant specifically denotes the industry-standard SOIC-14 surface-mount footprint, facilitating automated assembly in modern printed circuit board designs.

Replacement Considerations

SN7406DRE4: Verified equivalent from Texas Instruments with identical electrical characteristics and pinout.

FAQ

What is the maximum low-level output current?

The device can sink up to 40 mA in the low state.

Does the SN7406DR have push-pull outputs?

No, it features open-collector outputs which require external pull-up resistors for high-state operation.