TP8485E-SR

Drivers, Receivers, Transceivers Overview

The TP8485E-SR 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 250 kbps. The device features a true 1/8 unit load, enabling the connection of up to 256 nodes on a single bus without repeaters. It includes hot plug circuitry that maintains three-state outputs during power-up and power-down. The component provides ±12-kV Human Body Model ESD protection on bus pins and incorporates full fail-safe receiver functionality. It is housed in an SOP-8 package and is characterized for operation across an ambient temperature range of -40°C to +125°C.

Drivers, Receivers, Transceivers Feature Summary

• Hot Plug Circuitry: Driver and receiver outputs remain in a high-impedance state during power-up and power-down sequences to prevent bus contention.
• Full Fail-Safe Receiver: Guarantees a logic-high output when receiver inputs are floating, shorted together, or connected to a terminated but undriven bus.
• High Node Capacity: Low bus current consumption presents a 1/8 unit load to the network, supporting up to 256 transceivers per bus.
• Robust Protection: Bus pins feature integrated ESD protection rated at ±12 kV (HBM) and withstand common-mode voltages from -7 V to +12 V.

Drivers, Receivers, Transceivers Applications

• E-Metering Networks
• Industrial Automation Systems
• HVAC Control Systems
• Process Control Applications
• DMX512 Networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the package type and tape-and-reel quantity. The TP8485E-SR designation corresponds to the SOP-8 package with a standard reel quantity of 4,000 units. Confirm RoHS compliance and halogen-free status as defined by the manufacturer's green product standards before finalizing procurement specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring compatibility with standard RS-485 protocols while needing support for high node counts. The wide supply voltage range accommodates both 3.3 V and 5 V logic systems. Ensure the design accounts for the specified thermal resistance values if operating near the upper temperature limits. Verify that the required data rate does not exceed the 250 kbps maximum specification.

Drivers, Receivers, Transceivers Part Context

This device belongs to the TP8485E family of RS-485 transceivers produced by 3PEAK. The family includes variants such as the TP8485E-VR, which utilizes an MSOP-8 package instead of the SOP-8 form factor found in the TP8485E-SR. Both variants share identical electrical characteristics and functional capabilities, differing primarily in physical footprint and packaging logistics.

Drivers, Receivers, Transceivers Replacement Considerations

The TP8485E-VR serves as a direct pin-compatible alternative offering the same electrical performance in an MSOP-8 package. Designers requiring a smaller footprint may substitute this part, provided the PCB layout accommodates the different package dimensions. No functional changes are expected between these variants.