ISO7221MDR

Texas Instruments

Texas Instruments ISO7221MDR, general-purpose digital isolator, capacitive coupling, 2 channels unidirectional, 150 Mbps data rate, 2500 Vrms isolation, 25 kV/µs CMTI, 3V to 5.5V supply, -40°C to 125°C, 8-SOIC.

Texas Instruments ISO7221MDR
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MOQ 1 · Tape & Reel (TR) Cut Tape (CT) · RoHS · EIA-481 · DAP/DDP · T/T

Technical specifications

ISO7221MDR specifications
Parameter / AttributeSpecification / Value
TypeGeneral Purpose
Channel typeUnidirectional
MountingSurface Mount
Supply voltage3V ~ 5.5V
Voltage - isolation2500Vrms
Isolated powerNo
Operating temperature-40°C ~ 125°C
Pulse width distortion1ns
PackageTape & Reel (TR) Cut Tape (CT)
Data rate150Mbps
TechnologyCapacitive Coupling
Case8-SOIC (0.154\", 3.90mm Width)
Channels2
Inputs - side 1/Side 21/1
Rise (Fall time)1ns, 1ns
Propagation delay tpLH (tpHL)16ns, 16ns
Common mode transient immunity25kV/µs

Technical details

It comes in an 8-SOIC package (3.90 mm width), a standard footprint that reworks cleanly with hot air.

The 150 Mbps data rate handles fast serial links like SPI at 50 MHz or parallel bus isolations without stretching setup times. Propagation delay is 16 ns max, symmetrical, with pulse-width distortion held to 1 ns — tight enough to keep clock jitter under control in synchronous designs. This one holds the output state through those transients.

Supply flexibility and signal direction

The 3V to 5.5V supply range means the same part works on a 3.3V microcontroller side and a 5V sensor or actuator side without a level shifter. Channel configuration is 1 input on side 1 and 1 input on side 2, both unidirectional — that covers one isolated data line each direction, typical for isolated SPI (MISO/MOSI) or UART (TX/RX). If you need both channels going the same way, the sibling ISO7220 (2/0) is the alternative.

Package and rework note

It reflows easily and survives hot-air removal without pad damage if you preheat the board.

ISO7221MDR
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