P82B715PG4

Signal Buffers, Repeaters, Splitters Overview

The P82B715PG4 is an I2C bus extender manufactured by Texas Instruments, designed to extend the range of I2C buses while supporting large capacitive loads. It operates within a supply voltage range of 3 V to 12 V and supports clock frequencies up to 400 kHz. The device is housed in an 8-PDIP package and functions across an operating temperature range of -40°C to +85°C. It features independent short-circuit protection for both the source (Sx) and long-line (Lx) sides, allowing flexible voltage translation between different bus domains without level shifters.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides low-impedance bus driving capability to support high capacitive loads typical in extended cable runs.
• Features independent short-circuit protection on both source and long-line ports to prevent damage during fault conditions.
• Enables voltage translation between different I2C logic levels through independent VCC supplies for Sx and Lx sections.

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C communication distance over twisted pair cables in industrial signal distribution systems.
• Connecting remote sensors or peripherals where standard I2C capacitance limits are exceeded.
• Interfacing between 3.3V microcontrollers and 5V peripheral devices in mixed-voltage embedded systems.

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific package type and suffix when ordering, as the PG4 designation indicates a lead-free PDIP-8 variant. Confirm availability status with authorized distributors, as some G4 series components may have discontinuation notices. Ensure the supplier provides original manufacturer documentation to guarantee authenticity and correct pinout configuration for the DIP-8 form factor.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when standard I2C buffers fail due to excessive bus capacitance from long cables. It is suitable for applications requiring isolation between source and load voltage domains. Compare with active repeaters if bidirectional arbitration is critical, as this extender relies on emitter-follower topology. Ensure the application does not require SMBus alert responses or PEC error checking, which are not supported by this passive-style extension architecture.

Signal Buffers, Repeaters, Splitters Part Context

The P82B715 belongs to a family of I2C bus extenders originally developed to overcome the 400 pF capacitance limit of the I2C specification. The PG4 variant specifically denotes the lead-free plastic dual-in-line package version. It serves as a bridge between compact PCB-based controllers and distributed sensor networks connected via cabling.

Signal Buffers, Repeaters, Splitters Replacement Considerations

P82B715PE4: Pin-compatible PDIP-8 alternative with similar electrical characteristics. P82B715DR: SOIC-8 surface mount equivalent offering identical functionality in a smaller footprint. Verify that any substitute maintains the same independent short-circuit protection and voltage range specifications.