Features
- Wide supply voltage range 1.8V to 3.6V
- Low quiescent supply current 80µA (max)
- Very low shutdown supply current 2µA (max)
- High ESD protection on RS-485 outputs ±16.5kV HBM
- Class 3 ESD level on all other pins >8kV HBM
- Specified for +125°C
- Hot plug - Tx outputs remain three-state during power-up
- Low Tx leakage allows >256 devices on the bus
- Slew rate limited for data rates up to 256kbps
- Current limiting and thermal shutdown for driver overload protection
- 5V tolerant logic inputs
- Pb-Free (RoHS Compliant)
ISL32613E_ISL32614E Functional Diagram
Description
The ISL32613E and ISL32614E are ±16. 5kV HBM ESD protected (7kV IEC61000 contact), 1. 8V powered, single transmitters for differential communication. These drivers have very low bus currents (±40µA), so they present less than a 1/8 unit load to the bus. The low bus currents allow more than 256 transmitters on the network without violating the RS-485 specification’s 32 unit load maximum and without using repeaters. Hot plug circuitry ensures that the Tx outputs remain in a high impedance state while the power supply stabilizes. Both ICs use slew rate limited drivers, which reduce EMI and minimize reflections from improperly terminated transmission lines or unterminated stubs in multidrop and multipoint applications. The ISL32613E is more slew rate limited for data rates up to 128kbps, while the less limited ISL32614E is useful for data rates up to 256kbps. For companion low power single RS-485 receivers, see the ISL32610E datasheet.
Parameters
| Attributes | Value |
|---|---|
| Temp. Range (°C) | -40 to +125°C |
| Devices Allowed on Bus | 256 |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| SOT23 | 2.9 x 1.7 x 0.00 | 6 | 1 |
Applications
- Industrial/process control networks
- Space-constrained systems
- Factory automation
- Building environmental control/lighting systems
| Part Number | Status | Samples | Stock | RoHS | Package | Budgetary Price (USD) | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) | Country of Assembly | Country of Wafer Fabrication |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL32614EFHZ-T | Active | Available | In Stock | RoHS:EN | SOT23 | 1ku | $1.06 | 6# | Reel | 2 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | USA |
| ISL32614EFHZ-T7A | Active | Available | In Stock | RoHS:EN | SOT23 | 1ku | $1.54 | 6# | Reel | 2 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +125°C | MALAYSIA | USA |
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- TrainingPDF 719 KB R15TB0008EU0100 Rev.1.00 Dec 18, 2023
- TrainingPDF 762 KB R15TB0007EU0100 Rev.1.00 Dec 04, 2023
- TrainingPDF 208 KB R15TB0004EU0100 Rev.1.00 Oct 26, 2023
- TrainingPDF 405 KB R15TB0003EU0100 Rev.1.00 Jun 26, 2023
- TrainingPDF 239 KB R15TB0002EU0100 Rev.1.00 Jun 21, 2023
- 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.
- Technical BriefPDF 188 KB R70TB0002EU0100 Rev.1.00 May 17, 2022
- Application NotePDF 178 KB r15an0002eu-rs-485-transient-protection Oct 28, 2019
- TrainingPDF 156 KB tb506 Jun 25, 2019The RS-485 standard specifies the electrical characteristics of differential drivers and receivers in multi-point networks but does not explain their functional principles. This document explains how the differential line signals are generated by the driver and processed by the receiver.
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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 (13)
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- Product Change NoticePDF 398 KB PCN15046 Jan 07, 2016
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