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ISO121x Isolated Digital Input Receivers

Texas Instruments ISO121x Isolated Digital Input Receivers are isolated 24V to 60V digital input receivers, compliant with IEC 61131-2 Type 1, 2, and 3 characteristics. These devices are 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. This feature allows for the design of compact and high-density I/O modules. These devices do not require a field-side power supply and are configurable as sourcing or sinking inputs.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	ECAD Model	Series	Mounting Style	Package/Case	Number of Channels	Polarity	Data Rate	Isolation Voltage	Isolation Type	Supply Voltage - Max	Supply Voltage - Min	Operating Supply Current	Propagation Delay Time	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
	Digital Isolators Single-channel Isola ted 24-V to 60-V di A 595-ISO1211DR ISO1211D Texas Instruments 1: $1.49 136,865In Stock	Mfr. Part No. ISO1211D Mouser Part No 595-ISO1211D	Texas Instruments	Digital Isolators Single-channel Isola ted 24-V to 60-V di A 595-ISO1211DR Learn More about Texas Instruments ti iso1211 iso1212 receivers	Datasheet	136,865In Stock	$1.49 $1.09 $0.873 $0.817 View $0.78 $0.751 $0.736 $0.701 $0.692	Min.: 1 Mult.: 1			ISO1211	SMD/SMT	SOIC-8	1 Channel	Unidirectional	4 Mb/s	2500 Vrms	Capacitive Coupling	5.5 V	2.25 V	600 uA	10 ns	- 55 C	+ 125 C	Tube
	Digital Isolators Single-channel Isola ted 24-V to 60-V di ISO1211SDR Texas Instruments 1: $1.50 2,099In Stock New Product	Mfr. Part No. ISO1211SDR Mouser Part No 595-ISO1211SDR New Product	Texas Instruments	Digital Isolators Single-channel Isola ted 24-V to 60-V di Learn More about Texas Instruments ti iso1211 iso1212 receivers	Datasheet	2,099In Stock	Cut Tape $1.50 $1.10 $0.989 $0.877 View Reel $0.782 $0.824 $0.792 $0.782 $0.782 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,001 : 2,500			ISO1211	SMD/SMT	SOIC-8	1 Channel	Unidirectional	4 Mb/s	2500 Vrms	Capacitive Coupling	5.5 V	2.25 V	600 uA	10 ns	- 55 C	+ 125 C	Reel, Cut Tape, MouseReel
	Digital Isolators Dual-channel Isolate d 24-V to 60-V digi ISO1212SDBQR Texas Instruments 1: $1.56 2,311In Stock New Product	Mfr. Part No. ISO1212SDBQR Mouser Part No 595-ISO1212SDBQR New Product	Texas Instruments	Digital Isolators Dual-channel Isolate d 24-V to 60-V digi Learn More about Texas Instruments ti iso1211 iso1212 receivers	Datasheet	2,311In Stock	Cut Tape $1.56 $1.14 $1.04 $0.915 View Reel $0.816 $0.859 $0.826 $0.816 $0.816 MouseReel Available	Min.: 1 Mult.: 1 Max.: 1,001 : 2,500			ISO1212	SMD/SMT	SSOP-16	2 Channel	Unidirectional	4 Mb/s	2500 Vrms	Capacitive Coupling	5.5 V	2.25 V	1.2 mA	10 ns	- 55 C	+ 125 C	Reel, Cut Tape, MouseReel
	Digital Isolators Dual-channel Isolate d 24-V to 60-V digi ISO1212DBQ Texas Instruments 1: $1.73 32,498In Stock	Mfr. Part No. ISO1212DBQ Mouser Part No 595-ISO1212DBQ	Texas Instruments	Digital Isolators Dual-channel Isolate d 24-V to 60-V digi Learn More about Texas Instruments ti iso1211 iso1212 receivers	Datasheet	32,498In Stock	$1.73 $1.27 $1.05 $0.967 View $0.924 $0.922 $0.883 $0.864	Min.: 1 Mult.: 1			ISO1212	SMD/SMT	SSOP-16	2 Channel	Unidirectional	4 Mb/s	2500 Vrms	Capacitive Coupling	5.5 V	2.25 V	1.2 mA	10 ns	- 55 C	+ 125 C	Tube
	Digital Isolators Single-channel Isola ted 24-V to 60-V di A 595-ISO1211D ISO1211DR Texas Instruments 1: $1.27 7,216In Stock	Mfr. Part No. ISO1211DR Mouser Part No 595-ISO1211DR	Texas Instruments	Digital Isolators Single-channel Isola ted 24-V to 60-V di A 595-ISO1211D Learn More about Texas Instruments ti iso1211 iso1212 receivers	Datasheet	7,216In Stock	Cut Tape $1.27 $0.921 $0.834 $0.738 Reel $0.617 View $0.692 $0.664 $0.644 $0.615 MouseReel Available	Min.: 1 Mult.: 1 : 2,500			ISO1211	SMD/SMT	SOIC-8	1 Channel	Unidirectional	4 Mb/s	2500 Vrms	Capacitive Coupling	5.5 V	2.25 V	600 uA	10 ns	- 55 C	+ 125 C	Reel, Cut Tape, MouseReel
	Digital Isolators Dual-channel Isolate d 24-V to 60-V digi ISO1212DBQR Texas Instruments 1: $1.33 2,828In Stock 12,500Expected 21/12/2026	Mfr. Part No. ISO1212DBQR Mouser Part No 595-ISO1212DBQR	Texas Instruments	Digital Isolators Dual-channel Isolate d 24-V to 60-V digi Learn More about Texas Instruments ti iso1211 iso1212 receivers	Datasheet	2,828In Stock 12,500Expected 21/12/2026	Cut Tape $1.33 $0.963 $0.872 $0.772 Reel $0.664 View $0.725 $0.696 $0.676 $0.649 MouseReel Available	Min.: 1 Mult.: 1 : 2,500			ISO1212	SMD/SMT	SSOP-16	2 Channel	Unidirectional	4 Mb/s	2500 Vrms	Capacitive Coupling	5.5 V	2.25 V	1.2 mA	10 ns	- 55 C	+ 125 C	Reel, Cut Tape, MouseReel