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Texas Instruments ISO1212DBQR — Digital Isolators

TI ISO1212DBQR Digital Isolator, 2-Ch, 4Mbps, 2500Vrms

MPNISO1212DBQR
Active

Texas Instruments ISO1212DBQR, ISO121x series, general-purpose digital isolator, 2 unidirectional channels, 4 Mbps data rate, 2500 Vrms isolation, capacitive coupling, 25 kV/µs CMTI, 2.25V to 5.5V supply, -40°C to 125°C, 16-SSOP package.

$1.3200Ref. price · indicative, final on quote
Packaging16-SSOP (0.154", 3.90mm Width)
RoHSROHS3 Compliant
SeriesISO121x
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ISO1212DBQR specifications
ParameterValue
TypeGeneral Purpose
SeriesISO121x
Channel typeUnidirectional
MountingSurface Mount
Voltage2.25V ~ 5.5V
Voltage - isolation2500Vrms
Isolated powerNo
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR) Cut Tape (CT)
Data rate4Mbps
TechnologyCapacitive Coupling
Case16-SSOP (0.154\", 3.90mm Width)
Channels2
Inputs - side 1/Side 20/2
Rise (Fall time)3ns, 3ns
Propagation delay tpLH (tpHL)140ns, 15ns
Common mode transient immunity25kV/µs

Product details

Two-channel capacitive isolator for industrial signal isolation

It handles data rates up to 4 Mbps with a propagation delay of 140 ns max on the high-to-low transition and 15 ns on the low-to-high. The 25 kV/µs common-mode transient immunity keeps data intact when fast switching edges couple across the barrier — a requirement for motor-drive and inverter applications where the ground plane bounces. Both channels are on the output side (0/2 input-side count), so this part is meant for isolating signals that originate on the secondary side, not for bidirectional or transceiver-style isolation.

The 2500 Vrms isolation rating covers basic insulation. The 25 kV/µs CMTI keeps data intact in a VFD or motor-drive environment. The 4 Mbps data rate is fine for isolated SPI, UART, and GPIO isolation.

No isolated power is integrated.

Frequently asked questions

What are the alternatives to ISO1212DBQR if it is out of stock?

A functional alternative is the ISO7221CDR, a 2-channel unidirectional isolator with the same 2500 Vrms isolation and -40°C to 125°C range, but with a 25 Mbps data rate and a 1/1 input-side configuration. It is a drop-in consideration if your design can accommodate the faster edge rates and different channel assignment.

Can ISO1212DBQR be used for I2C isolation?

This part is unidirectional, so it cannot directly isolate a bidirectional I2C bus without external logic to handle direction switching. It works for isolating unidirectional signals like SPI chip selects or UART TX/RX lines, but not for open-drain bidirectional buses.