P82B715DR

Signal Buffers, Repeaters, Splitters Overview

The P82B715DR is a single-channel I2C bus extender manufactured by Texas Instruments, designed to extend the reach of I2C buses over long cables. It operates within a supply voltage range of 3 V to 12 V and supports clock frequencies up to 400 kHz. The device features a propagation delay of 250 ns and an input capacitance of 10 pF. It draws a supply current of 22 mA and functions reliably across an operating temperature range of -40°C to +85°C. Housed in an 8-SOIC surface-mount package with a width of 3.90 mm, it facilitates low-impedance bus driving for high-capacitance loads.

Signal Buffers, Repeaters, Splitters Feature Summary

• Extends I2C bus distance by providing low-impedance output drivers capable of supporting large cable capacitances.
• Enables independent voltage domain translation between source and load sides without requiring level shifters.
• Supports standard I2C communication speeds up to 400 kHz with minimal signal propagation delay.

Signal Buffers, Repeaters, Splitters Applications

• Driving I2C signals over twisted pair cables in large signal distribution systems.
• Connecting remote sensors or peripherals where cable length exceeds standard I2C limitations.
• Interfacing between different voltage domains (e.g., 3.3V MCU to 5V peripheral) via isolated bus segments.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct packaging and environmental compliance. Confirm that the component status remains active, as availability may vary by distributor. Cross-reference the manufacturer part number with authorized channel listings to avoid counterfeit components. Ensure the selected package variant matches the intended PCB footprint requirements.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when extending I2C bus length over significant distances using passive cabling. It is suitable for applications requiring operation across wide supply voltages from 3 V to 12 V. Consider the 8-SOIC package for surface-mount assembly constraints. Evaluate the 400 kHz speed limit against system timing requirements before implementation.

Signal Buffers, Repeaters, Splitters Part Context

The P82B715DR belongs to the P82B715 family of I2C bus extenders from Texas Instruments. This series utilizes emitter-follower-based architecture to enhance sink capability and drive low-impedance loads. The DR suffix specifically denotes the 8-SOIC surface-mount package variant, distinguishing it from through-hole options like the PDIP version.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The P82B715DRG4 is a verified equivalent part number within the same product family, offering identical electrical characteristics and functionality. Both variants share the same SOIC-8 package and performance specifications.