Features
- High ESD protection on RS-485 I/O pins
- ISL3179E: ±16.5kV IEC61000
- ISL3180E: ±12kV HBM
- Class 3 HBM level on all other pins (ISL3179E): >9kV
- Specified for +125°C operation
- High data rates: up to 40Mbps
- 5V tolerant logic inputs
- 1/5 unit load allows up to 160 devices on the bus
- Full fail-safe (open, shorted, terminated/undriven) receiver
- Hot plug - Tx and Rx outputs remain three-state during power-up
- Low quiescent current: 4mA (max)
- Low current shutdown mode: 1μA (max)
- -7V to +12V common-mode input voltage range
- Three-state Rx and Tx outputs
- 16/16.5ns (max) Tx/Rx propagation delays; 1.5ns (max) skew
- Operates from a single +3.3V supply (10% tolerance)
- Current limiting and thermal shutdown for driver overload protection
- Pb-free (RoHS compliant)
ISL3179E_ISL3180E Functional Diagram
Description
The ISL3179E and ISL3180E are high ESD protected, 3. 3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each device has low bus currents (+220μA/-150μA), so they present a “1/5 unit load” to the RS-485 bus. This allows up to 160 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters. Receiver (Rx) inputs feature a “full fail-safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. The ISL3180E is configured for full duplex applications. The ISL3179E half duplex version multiplexes the Rx inputs and Tx outputs to allow a transceiver with an output disable function in 8 Ld packages. Hot plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes.
Parameters
| Attributes | Value |
|---|---|
| Temp. Range (°C) | -40 to +85°C, -40 to +125°C |
| Devices Allowed on Bus | 160 |
Application Block Diagrams
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Additional Applications
- Motor Controller/Position Encoder Systems
- Factory Automation
- Field Bus Networks
- Security Networks
- Building Environmental Control Systems
- Industrial/Process Control Networks
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| Part Number | Status | Samples | Stock | RoHS | Package | Budgetary Price (USD) | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL3179EFBZ | Active | Available | In Stock | RoHS:EN | SOIC | 1ku | $1.27 | 8# | Tube | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | CHINA, TAIWAN, MALAYSIA | USA |
| ISL3179EFBZ-T | Active | N/A | Out of Stock | RoHS:EN | SOIC | 1ku | $1.27 | 8# | Reel | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | CHINA, TAIWAN, MALAYSIA | USA |
| ISL3179EFBZ-T7A | Active | N/A | In Stock | RoHS:EN | SOIC | 1ku | $1.79 | 8# | Reel | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | CHINA, TAIWAN, MALAYSIA | USA |
| ISL3179EFRZ | Active | Available | In Stock | RoHS:EN | DFN | 1ku | $1.27 | 10# | Tube | 3 | 0.5mm | 3.0 x 3.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | USA |
| ISL3179EFRZ-T | Active | N/A | Out of Stock | RoHS:EN | DFN | 1ku | $1.27 | 10# | Reel | 3 | 0.5mm | 3.0 x 3.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | USA |
| ISL3179EFRZ-T7A | Active | N/A | In Stock | RoHS:EN | DFN | 1ku | $1.79 | 10# | Reel | 3 | 0.5mm | 3.0 x 3.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | USA |
| ISL3179EIBZ | Active | Available | In Stock | RoHS:EN | SOIC | 1ku | $1.13 | 8# | Tube | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA, TAIWAN | USA |
| ISL3179EIBZ-T | Active | N/A | In Stock | RoHS:EN | SOIC | 1ku | $1.13 | 8# | Reel | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA, TAIWAN | USA |
| ISL3179EIBZ-T7A | Active | N/A | In Stock | RoHS:EN | SOIC | 1ku | $1.56 | 8# | Reel | 3 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA, TAIWAN | USA |
| ISL3179EIRZ | Active | Available | Out of Stock | RoHS:EN | DFN | 1ku | $1.13 | 10# | Tube | 3 | 0.5mm | 3.0 x 3.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA | USA |
| ISL3179EIRZ-T | Active | N/A | Out of Stock | RoHS:EN | DFN | 1ku | $1.13 | 10# | Reel | 3 | 0.5mm | 3.0 x 3.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA | USA |
| ISL3179EIRZ-T7A | Active | N/A | In Stock | RoHS:EN | DFN | 1ku | $1.56 | 10# | Reel | 3 | 0.5mm | 3.0 x 3.0 x 0.90 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA | USA |
| ISL3179EIUZ | Active | Available | In Stock | RoHS:EN | MSOP | 1ku | $1.13 | 8# | Tube | 1 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA | USA |
| ISL3179EIUZ-T | Active | N/A | In Stock | RoHS:EN | MSOP | 1ku | $1.13 | 8# | Reel | 1 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C | MALAYSIA | USA |
| ISL3179EFUZ | Obsolete | N/A | Out of Stock | RoHS:EN | MSOP | 8# | Tube | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | |||
| ISL3179EFUZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | MSOP | 8# | Reel | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | |||
| ISL3179EFUZ-T7A | Obsolete | N/A | Out of Stock | RoHS:EN | MSOP | 8# | Reel | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | |||
| ISL3179EIUZ-T7A | Obsolete | N/A | In Stock | RoHS:EN | MSOP | 8# | Reel | 1 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- TrainingPDF 719 KB R15TB0008EU0100 Rev.1.00 Dec 18, 2023
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- Application NotePDF 365 KB AN1978 Apr 12, 2023AI-generated Summary: The document details surge protection circuits for RS-485 transceivers, focusing on Level 4 (4kV) protection using gas discharge tubes (GDTs) for higher overvoltage and overcurrent tolerance. It compares protection schemes by component count, board area, and cost, highlighting that higher-level protection increases complexity and expense. The BOMs for Level 3 and Level 4 circuits list components such as transceivers, bidirectional TVS diodes, transient blocking units, thyristors or GDTs, and resistors. The GDT switching characteristic explains how it diverts transient currents to ground by transitioning from high impedance to a crowbar current path. Simpler protection can be achieved with overvoltage protected transceivers.
- Application NotePDF 207 KB an1985 Aug 19, 2022AI-generated Summary: Transient protection for RS-485 transceivers involves careful TVS diode design to prevent damage from high surge currents. Internal ESD structures in the ISL3152E share transient current with external TVS diodes, risking damage without current-limiting resistors. Using thick-film resistors under 200 ohms between TVS and transceiver limits surge current while minimizing bus voltage attenuation. Recommended PCB layout includes low-inductance ground and Vcc planes, 0603 resistors for wave or reflow soldering, and proper component placement to reduce inductance and enhance protection.
- Application NotePDF 474 KB AN1979 Aug 16, 2022AI-generated Summary: The document explains surge protection using Renesas’ Overvoltage Protected (OVP) transceivers with various protection schemes. It details the use of TVS diodes and thyristors to protect data lines against surge currents while maintaining low capacitance for high data rates. Different configurations address various common-mode voltage ranges and surge levels, ensuring compliance with IEC61000-4-5 standards. The paper includes calculations for peak protection voltages and discusses device characteristics and combinations for robust surge protection in industrial applications.
- Product Change NoticePDF 178 KB Jun 17, 2022
- Technical BriefPDF 188 KB R70TB0002EU0100 Rev.1.00 May 17, 2022
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- Application NotePDF 365 KB AN1978 Apr 12, 2023AI-generated Summary: The document details surge protection circuits for RS-485 transceivers, focusing on Level 4 (4kV) protection using gas discharge tubes (GDTs) for higher overvoltage and overcurrent tolerance. It compares protection schemes by component count, board area, and cost, highlighting that higher-level protection increases complexity and expense. The BOMs for Level 3 and Level 4 circuits list components such as transceivers, bidirectional TVS diodes, transient blocking units, thyristors or GDTs, and resistors. The GDT switching characteristic explains how it diverts transient currents to ground by transitioning from high impedance to a crowbar current path. Simpler protection can be achieved with overvoltage protected transceivers.
- Application NotePDF 207 KB an1985 Aug 19, 2022AI-generated Summary: Transient protection for RS-485 transceivers involves careful TVS diode design to prevent damage from high surge currents. Internal ESD structures in the ISL3152E share transient current with external TVS diodes, risking damage without current-limiting resistors. Using thick-film resistors under 200 ohms between TVS and transceiver limits surge current while minimizing bus voltage attenuation. Recommended PCB layout includes low-inductance ground and Vcc planes, 0603 resistors for wave or reflow soldering, and proper component placement to reduce inductance and enhance protection.
- Application NotePDF 474 KB AN1979 Aug 16, 2022AI-generated Summary: The document explains surge protection using Renesas’ Overvoltage Protected (OVP) transceivers with various protection schemes. It details the use of TVS diodes and thyristors to protect data lines against surge currents while maintaining low capacitance for high data rates. Different configurations address various common-mode voltage ranges and surge levels, ensuring compliance with IEC61000-4-5 standards. The paper includes calculations for peak protection voltages and discusses device characteristics and combinations for robust surge protection in industrial applications.
- Application NotePDF 178 KB r15an0002eu-rs-485-transient-protection Oct 28, 2019
- White PaperIndustrial PC designs increasingly demand compact form factors and flexible communication interfaces. This paper explores how modern dual-protocol transceivers support both RS-232 and RS-485 standards while offering high integration and advanced configuration options. It also presents application examples that illustrate their versatility in industrial systems.View More (16)
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ROS-Based Robot Body Controller Reference Design
This reference design allows for the control of multiple servos using the Robot Operating System (ROS). Our RA6M5 MCU, featuring the high-performance Arm® Cortex®-M33, integrates communication interfaces like Ethernet and USB for seamless Pub/Sub messaging between ROS nodes. By utilizing our Read More
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