Product details

Rating Catalog Isolation rating Basic Number of channels 1 Forward/reverse channels 1/0 Data rate (max) (Mbps) 4 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 5200 Transient isolation voltage (VIOTM) (VPK) 3600 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 60 Supply voltage (min) (V) 2.25 Propagation delay time (typ) (µs) 0.14
Rating Catalog Isolation rating Basic Number of channels 1 Forward/reverse channels 1/0 Data rate (max) (Mbps) 4 Working isolation voltage (VIOWM) (Vrms) 400 Surge isolation voltage (VIOSM) (VPK) 5200 Transient isolation voltage (VIOTM) (VPK) 3600 Withstand isolation voltage (VISO) (Vrms) 2500 CMTI (min) (kV/µs) 25 Operating temperature range (°C) -40 to 125 Supply voltage (max) (V) 60 Supply voltage (min) (V) 2.25 Propagation delay time (typ) (µs) 0.14
SOIC (D) 8 29.4 mm² 4.9 x 6
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Technical documentation

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Type Title Date
* Data sheet ISO121x Isolated 24-V to 60-V Digital Input Receivers for Digital Input Modules datasheet (Rev. F) PDF | HTML 16 Apr 2020
Certificate VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. W) 31 Jan 2024
Certificate CSA Certificate for ISO1211xD 22 Mar 2023
Certificate CQC Certificate for ISOxxD (Rev. A) 07 Feb 2023
Certificate TUV Certificate for Isolation Devices (Rev. K) 05 Aug 2022
Certificate UL Certificate of Compliance File E181974 Vol 4 Sec 6 (Rev. P) 05 Aug 2022
Technical article Understand and apply safety-limiting values for digital isolators PDF | HTML 20 Jan 2021
Application brief How to Design Isolated Digital Input Modules for Surge Immunity 31 Mar 2020
Technical article Solving lifetime and temperature challenges in AC motor drives with capacitive-bas PDF | HTML 01 Nov 2019
Technical article Optocouplers and silicon-based galvanic isolation technology – how do they work? PDF | HTML 28 Oct 2019
White paper How Capacitive Isolation Solves Key Challenges in AC Motor Drives 23 Aug 2019
Application brief An Isolated 24 V Power Supply Window Monitor 01 Aug 2019
Technical article What are isolated digital inputs? PDF | HTML 08 Mar 2019
Application brief Space saving design techniques for multi-channel high-voltage DI modules (Rev. B) 02 Oct 2018
Application brief How to Design Isolated Comparators for ±48V, 110V and 240V DC and AC Detection (Rev. A) 14 Mar 2018
Application brief How To Simplify Isolated 24-V PLC Digital Input Module Designs (Rev. B) 14 Mar 2018
Application note ISO121x Threshold Calculator for 9V to 300V DC and AC Voltage Detection 01 Mar 2018
User guide ISO1211 Isolated Digital-Input Receiver Evaluation Module (Rev. A) 18 Jan 2018
Application brief How to Improve Speed and Reliability of Isolated Digital Inputs in Motor Drives 16 Dec 2017
Analog Design Journal How to use isolation to improve ESD, EFT and surge immunity in industrial system 24 Jul 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

ISO1211EVM — Evaluation module for the ISO1211 isolated digital input receiver

The ISO1211EVM is an evaluaiton module (EVM) used to evaluate the ISO1211 isolated industrial reciever that can receive a 9-V to 60-V field input and provide an isolated digital output. The EVM accomodates two ISO1211 devices showcasing 2 channel functionality. The EVM features enough test (...)
User guide: PDF
Not available on TI.com
Simulation model

ISO1211 PSpice Transient Model (Rev. C)

SLLM383C.ZIP (117 KB) - PSpice Model
Simulation model

ISO1211 TINA-TI Transient Reference Design

SLLM390.TSC (1859 KB) - TINA-TI Reference Design
Simulation model

ISO1211 TINA-TI Transient Reference Design (Rev. A)

SLLM390A.TSC (1859 KB) - TINA-TI Reference Design
Simulation model

ISO1211 TINA-TI Transient Spice Model (Rev. A)

SLLM389A.ZIP (12 KB) - TINA-TI Spice Model
Simulation model

ISO121X IBIS Model (Rev. B)

SLLM372B.ZIP (52 KB) - IBIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-01599 — TÜV SÜD-assessed safe torque off (STO) reference design for industrial drives (IEC 61800-5-2)

This reference design outlines a safe torque off (STO) subsystem for a three-phase inverter with CMOS input isolated IGBT gate drivers. The STO subsystem employs a dual-channel architecture (1oo2) with a hardware fault tolerance of 1 (HFT=1). It is implemented following a de-energize trip concept. (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01509 — Broken Wire Detection Using An Optical Switch Reference Design

This reference design shows a compact implementation of 16 isolated digital input channels using TI's ISO121x devices. The design is split into two groups of eight channels each. A broken wire detection can be executed using only one additional optical switch for each channel or two optical (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01508 — Sub 1-W, 16-Channel, Isolated Digital Input Module Reference Design

This reference design shows a compact implementation of 16 isolated digital input channels using TI's ISO121x devices. The design works without an isolated supply and supports up to 100-kHz input signals (200-kbit) per channel. All 16 channels consume less than 1-W input power combined, which (...)
Design guide: PDF
Schematic: PDF
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