STR485ELVQT

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STR485ELVQT

IC TRANSCEIVER HALF 1/1 10DFN

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規格

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

概述

Description

STR485ELVQT is a low-voltage RS-485 transceiver IC from STMicroelectronics. It provides a complete half‑duplex driver and receiver that lets a microcontroller communicate over an RS-485 twisted-pair network. The device is designed for single-supply operation and includes a fail-safe receiver so RO outputs a known level when the bus is idle, open, or shorted. Control pins DE (driver enable) and RE (receiver enable) allow independent control of the transmitter and receiver, while DI and RO interface with a UART-compatible MCU. It features robust protection (e.g., ESD, short-circuit protection) and is suitable for industrial and building-automation networks that require noise immunity and long-distance communication. The QT suffix typically indicates tape-and-reel packaging for automated assembly. Common use cases include industrial automation, sensor networks, and remote I/O where a microcontroller needs reliable RS-485 connectivity.

Features

Here are typical features of STR485ELVQT (RS-485 transceiver):
- 2‑wire, half‑duplex RS‑485 transceiver
- Single‑supply operation (3.0–5.5 V; optimized for low‑voltage/3.3 V systems)
- Driver enable (DE) and receiver enable (RE) for power saving
- Failsafe receiver: known logic level on idle/open/shorted bus
- Robust bus protection and EMI/ESD tolerance
- Suitable for multi‑drop networks with standard RS‑485 signaling
- Fast propagation and support for high data rates (typical for RS‑485 transceivers)
- Low quiescent current in receive mode; efficient in standby
- Industrial temperature range (suitable for harsh environments)
- RoHS/lead‑free packaging (QT variant)
Note: exact electrical specs (speed, current, voltage ranges, temp range) are in the datasheet—please consult it for precise figures.

Package

STR485ELVQT is packaged in an 8‑pin SOIC (SOP-8) package.

Pinout

Pin count: 8 pins (8-pin package, e.g., SO-8/TSSOP-8).
Function: Single‑channel RS-485/RS-422 transceiver (half‑duplex) with differential bus pins A and B, data input DI, data output RO, driver enable DE, receiver enable /RE, plus VCC and GND.

Manufacturer

- Manufacturer: STMicroelectronics (ST)
- What kind of company: A multinational semiconductor company that designs, manufactures, and markets integrated circuits and discrete semiconductors. Headquartered in Geneva, Switzerland; one of the world’s largest semiconductor makers (born from the merger of SGS Microelettronica and Thomson Semiconductors).

Application

STR485ELVQT is an RS-485/RS-422 transceiver. Applications include: industrial automation and process control networks (PLCs, remote I/O); building automation and smart metering; data acquisition and telemetry; distributed instrumentation; point-to-point and multi-drop RS-485 networks; motor drives and HVAC control; rugged EMI-prone environments.

Equivalent

STR485ELVQT is an 8‑pin RS-485 transceiver. Common drop-in equivalents from other vendors include:
- TI: SN65HVD178 / SN65HVD238
- Maxim: MAX485 / MAX487
- Analog Devices: ADM485
Note: verify supply voltage (5V vs 3.3V), pinout, and fail‑safe features for your board, as some variants differ.

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