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Pinout
Key specifications
Ordering variants
CAD (KiCad official)
Provenance

README

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ISO1212DBQR

Texas Instruments · Digital Isolators · SSOP-16-150mil

ISO1212DBQR from Texas Instruments, in a SSOP-16-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	GND1	power_in	Logic-side ground return for VCC1. Tie to the controller-side ground plane; internally shared with pin 8.
2	VCC1	power_in	Logic-side (side 1) supply input, 2.25 V to 5.5 V (abs max 6 V). Decouple locally to GND1; supports 2.5 V, 3.3 V, or 5 V controllers.
3	EN	input	Active-high output enable for both channels on side 1. OUT1/OUT2 are driven when EN is high or left open, and are placed in high-impedance when EN is low. Tie to VCC1 in noisy applications. Referenced to GND1; abs-max VCC1+0.5 V.
4	OUT1	output	Channel 1 isolated logic output on side 1, referenced to GND1. Reflects the field-side input state of channel 1; high-Z when EN is low. Output current rated ±15 mA absolute maximum.
5	OUT2	output	Channel 2 isolated logic output on side 1, referenced to GND1. Reflects the field-side input state of channel 2; high-Z when EN is low. Output current rated ±15 mA absolute maximum.
6	NC	unconnected	Not connected internally. Leave floating or tie to GND1 for mechanical stability.
7	NC	unconnected	Not connected internally. Leave floating or tie to GND1 for mechanical stability.
8	GND1	power_in	Logic-side ground return for VCC1 (second bond to the side-1 ground). Tie together with pin 1 to the controller-side ground plane.
9	FGND2	power_in	Channel 2 field-side ground return. Reference for the 24 V field input on channel 2 and return for the sensed current through IN2.
10	IN2	input	Channel 2 field-side current input. Sinks the precision-limited input current (2.2-2.47 mA Type 3, adjustable up to 6.5 mA) from the field switch/sensor through an external RSENSE. Withstands ±60 V with reverse-polarity protection.
11	SENSE2	input	Channel 2 field-side voltage sense input. Monitors the field voltage through an external RTHR to set VIH/VIL thresholds per IEC 61131-2 type. ±60 V input tolerance.
12	SUB2	passive	Internal connection to the channel-2 input-die substrate. Must be left unconnected on the PCB per the datasheet.
13	SUB1	passive	Internal connection to the channel-1 input-die substrate. Must be left unconnected on the PCB per the datasheet.
14	FGND1	power_in	Channel 1 field-side ground return. Reference for the 24 V field input on channel 1 and return for the sensed current through IN1.
15	IN1	input	Channel 1 field-side current input. Sinks the precision-limited input current (2.2-2.47 mA Type 3, adjustable up to 6.5 mA) from the field switch/sensor through an external RSENSE. Withstands ±60 V with reverse-polarity protection.
16	SENSE1	input	Channel 1 field-side voltage sense input. Monitors the field voltage through an external RTHR to set VIH/VIL thresholds per IEC 61131-2 type. ±60 V input tolerance.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SSOP-16-150mil
Category	Comm/UART
Pins	16

Ordering variants

ISO1212DBQR

CAD (KiCad official)

Symbol: ISO1212DBQR
Footprint: Package_SO:SSOP-16_5.3x6.2mm_P0.65mm
3D model: SSOP-16-150mil (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (None pp, sha256 9d3930fe4d22efee, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

Symbol & Footprint

Schematic Symbol

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PCB Footprint