STR485LVQT

Drivers, Receivers, Transceivers Overview

The STR485LVQT is a half-duplex RS-485 transceiver manufactured by STMicroelectronics, housed in a DFN10 package. It supports a logic supply voltage (VL) range of 1.65 V to 3.6 V and a bus supply voltage (VCC) range of 3 V to 3.6 V. The device offers selectable data rates: up to 20 Mbps when the SLR pin is grounded or left floating, and 250 kbps when connected to VL. It features thermal shutdown protection at 165 °C, fail-safe receiver capabilities for open, shorted, or idle buses, and high ESD protection ratings including ±16 kV air discharge and ±8 kV contact discharge.

Drivers, Receivers, Transceivers Feature Summary

• Supports selectable data rates of 20 Mbps or 250 kbps via the SLR pin configuration
• Includes fail-safe receiver functionality that guarantees a high output state during bus faults
• Provides integrated thermal shutdown protection to prevent damage from excessive power dissipation

Drivers, Receivers, Transceivers Applications

• Low-voltage RS-485 communication networks requiring 1.8 V I/O compatibility
• Industrial automation systems utilizing long-distance data transmission at reduced speeds
• Embedded devices operating within extended industrial temperature ranges

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering code STR485LVQT against the manufacturer's datasheet DS12713 Rev 7 to confirm the -40 °C to +105 °C temperature range and DFN10 package type. Ensure that the application design respects the distinct voltage requirements for the logic supply (VL) and bus supply (VCC), as well as the recommended decoupling capacitor specifications for stable operation.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems that require compatibility with 1.8 V logic levels while driving a 3.3 V RS-485 bus. The device is suitable for applications needing high-speed data transfer up to 20 Mbps or extended cable running capabilities at 250 kbps. Consider the DFN10 package dimensions and thermal resistance characteristics if heat dissipation is a critical factor in the PCB layout.

Drivers, Receivers, Transceivers Part Context

This part belongs to the STR485 series of low-power differential line transceivers designed for standard RS-485 applications. It is characterized by its ability to operate with separate logic and bus supply voltages, facilitating integration into mixed-voltage environments. The series emphasizes robustness through built-in protections against electrostatic discharge and thermal overload.

Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes within the same family include the STR485L without the QT suffix, which shares identical electrical specifications but may differ in packaging quantity or reel configuration. Verify pinout compatibility and voltage tolerances before replacing.