STR485ELVQT

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STR485ELVQT

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Especificações

Atributo Valor
Supplier STMicroelectronics
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Type Transceiver
Protocol RS485
NumberofDrivers/Receivers 1/1
Duplex Half
ReceiverHysteresis 70 mV
DataRate 20Mbps
Voltage-Supply 3V ~ 3.6V
OperatingTemperature -40°C ~ 125°C (TA)
MountingType Surface Mount
Package/Case 10-VFDFN Exposed Pad

Visão Geral

Description

STR485ELVQT is a low‑voltage RS‑485/RS‑422 transceiver (STMicroelectronics STR family). It provides a half‑duplex differential driver and receiver on a single supply (typical 3.3 V), with DI (data in), RO (data out), DE (driver enable) and RE (receiver enable) pins to connect a microcontroller to an RS‑485 bus (A/B). Features usually include fail‑safe operation, ESD protection, and suitability for long‑distance industrial networks. The ELVQT suffix suggests lead‑free RoHS packaging, often in a reel/tape (QT). Typical uses: multi‑point industrial automation, building control, and sensor networks. For exact voltage, data rate, bus loading, pinout, and packaging details, consult the current datasheet.

Equivalent

STR485ELVQT is a 3.3V RS-485 transceiver. Common equivalents from other vendors include:
- TI: SN65HVD178 / SN65HVD232 (RS-485 transceivers)
- Maxim: MAX485 / MAX487
- Analog Devices: ADM485
- NXP: SP485 / SP487
Any 3.3V, 2‑wire, half‑duplex RS‑485 transceiver with tri-state outputs can typically substitute, subject to pinout/drive/enable requirements.

Features

STR485ELVQT is a single‑channel, low‑voltage RS-485/RS-422 transceiver. Key features include:
- Half‑duplex RS‑485 transceiver with 1/2 unit load on the bus
- 3.3 V operation (ELV) with 5 V tolerant inputs
- Data rate up to around 5 Mbps
- Fail‑safe receiver output (guaranteed high when inputs are open/idle)
- DE/RE control for easy bus management
- Robust protections: ±15 kV ESD on bus pins, short‑circuit protection
- Low quiescent current; suitable for power-sensitive applications
- Wide temperature range (-40 °C to 125 °C)
- 8‑pin package, RoHS compliant (QT = Tape & Reel)

Pinout

Pin count: 8 pins
Function: Single-channel RS-485 half-duplex transceiver. Provides differential driver/receiver with:
- A, B: RS-485 bus lines
- DI: data input to the driver
- RO: receiver data output
- DE: driver enable
- /RE: receiver enable (active low)
- VCC and GND (power)

Manufacturer

- Manufacturer: STMicroelectronics (ST)
- What kind of company: A multinational semiconductor company that designs and manufactures integrated circuits and other electronic components.

Application

STR485ELVQT is a low-voltage RS-485 transceiver. Typical application areas include:
- Industrial automation and PLC/RTU networks (Modbus RTU, etc.)
- Building automation (HVAC, lighting, security)
- Remote telemetry and data acquisition (metering, environmental sensors)
- SCADA and distributed control systems
- Long-distance, multipoint RS-485 networks (campus or facility networks)
Note: Used where robust differential multi-drop serial links are required over modest distances.

Package

8-pin SO-8 (small-outline) package; QT indicates Tape & Reel packaging.

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