TPT487L1-SO1R

Drivers, Receivers, Transceivers Overview

The TPT487L1-SO1R is a half-duplex RS-485 transceiver manufactured by 3PEAK, designed for balanced communication networks. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 500 Kbps. The device presents a true 1/8 unit load to the bus, enabling the connection of up to 256 nodes without repeaters. It features full fail-safe receiver inputs that ensure a logic-high output during open, shorted, or idle terminated bus conditions. The component includes hot-plug circuitry to maintain three-state outputs during power-up and power-down events.

Drivers, Receivers, Transceivers Feature Summary

• Exceeds EIA-485 standard requirements with robust bus-pin protection against electrostatic discharge.
• Incorporates full fail-safe receiver design to guarantee high output states under fault conditions.
• Supports hot-plug operations with driver and receiver outputs remaining in a three-state condition.

Drivers, Receivers, Transceivers Applications

• Motor Drives
• Industrial Control
• Communication Infrastructure

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix SO1R corresponds to the SOP-8 package format before finalizing procurement. Confirm the tape and reel quantity matches project requirements, as this variant typically ships in reels of 4000 units. Ensure the -40°C to +125°C operating temperature range aligns with the environmental specifications of the target application system.

Drivers, Receivers, Transceivers Selection Notes

Select the TPT487L1-SO1R when designing systems requiring compliance with RS-485 standards and support for extensive network topologies. This component is suitable for applications demanding high noise immunity and reliable operation in electrically noisy industrial environments. Consider the thermal characteristics of the SOP-8 package if the design involves significant power dissipation or limited airflow.

Drivers, Receivers, Transceivers Part Context

The TPT487 series represents 3PEAK's solution for low-power, high-reliability serial communication interfaces. The L1 suffix indicates the specific SOP-8 packaging configuration within the broader TPT487 family, which also includes MSOP-8 and DFN variants. This part is engineered to provide cost-effective integration into embedded systems requiring robust differential signaling capabilities.

Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-to-pin replacements within the same manufacturer family include TPT487-VS1R (MSOP-8) and TPT487L1-DF6R (DFN3X3-8). Cross-manufacturer substitutions require careful verification of electrical parameters, specifically the 1/8 unit load requirement and fail-safe thresholds, to ensure network compatibility.

Drivers, Receivers, Transceivers FAQ

What is the maximum number of nodes supported on an RS-485 bus using this device?

The TPT487L1-SO1R presents a 1/8 unit load to the bus, allowing up to 256 transceivers to be connected on a single network segment without the need for repeaters.

How does the device handle bus faults such as open circuits or shorts?

The receiver features a full fail-safe design that ensures the output remains at a logic-high state if the receiver inputs are floating, shorted together, or if the bus is terminated but undriven.

Is the TPT487L1-SO1R suitable for hot-plugging applications?

Yes, the device includes hot-plug circuitry that keeps both the transmitter and receiver outputs in a three-state condition during power-up and power-down sequences, preventing bus contention.