See datasheet for actual packaging/pinout drawings


Package | PIN:

DBQ | 16


M (-55 to 125)

ECO Plan:

Green (RoHS & no Sb/Br)


Isolated 24-V to 60-V Digital Input Receivers for Digital Input Modules

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500 - 749 $ 1.14
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Texas Instruments ISO1212DBQ

The ISO1211 and ISO1212 devices are isolated 24-V to 60-V digital input receivers, compliant to IEC 61131-2 Type 1, 2, and 3 characteristics, suitable for programmable logic controllers (PLCs) and motor-control digital input modules. Unlike traditional optocoupler solutions with discrete, imprecise current limiting circuitry, the ISO121x devices provide a simple, low-power solution with an accurate current limit to enable the design of compact and high-density I/O modules. These devices do not require field-side power supply and are configurable as sourcing or sinking inputs.

The ISO121x devices operate over the supply range of 2.25 V to 5.5 V, supporting 2.5-V, 3.3-V, and 5-V controllers. A ±60-V input tolerance with reverse polarity protection helps ensure the input pins are protected in case of faults with negligible reverse current. These devices support up to 4-Mbps data rates passing a minimum pulse width of 150 ns for high-speed operation. The ISO1211 device is ideal for designs that require channel-to-channel isolation and the ISO1212 device is ideal for multichannel space-constrained designs.

The ISO121x devices reduce component count, simplify system design, and reduce board temperatures compared to traditional solutions. For details, refer to the How To Simplify Isolated 24-V PLC Digital Input Module Designs TI TechNote.

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