Texas Instruments ISO721MMDREP, General Purpose digital isolator, 1-channel unidirectional, capacitive coupling, 150 Mbps data rate, 4000 Vpk isolation, 8-SOIC package, -55°C to 125°C operating temperature, 3V to 5.5V supply range.
| Parameter | Value |
|---|---|
| Type | General Purpose |
| Channel type | Unidirectional |
| Mounting | Surface Mount |
| Voltage | 3V ~ 3.6V, 4.5V ~ 5.5V |
| Voltage - isolation | 4000Vpk |
| Isolated power | No |
| Operating temperature | -55°C ~ 125°C |
| Pulse width distortion | 1ns |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Data rate | 150Mbps |
| Technology | Capacitive Coupling |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
| Channels | 1 |
| Inputs - side 1/Side 2 | 1/0 |
| Rise (Fall time) | 1ns, 1ns |
| Propagation delay tpLH (tpHL) | 16ns, 16ns |
| Common mode transient immunity | 25kV/µs |
At 150 Mbps this part handles full-speed SPI, high-speed UART, and most parallel control signals without bit-rate bottlenecks. The 25 kV/µs common-mode transient immunity means it holds data integrity across the barrier during motor-drive PWM switching or relay contact bounce — a spec that matters more than raw data rate in electrically noisy industrial backplanes.
No last-time-buy window to track, no forced redesign for obsolescence.
150 Mbps data rate and 4000 Vpk isolation voltage. The 16 ns propagation delay and 1 ns pulse-width distortion keep timing tight for high-speed links.
Pin-compatible with the single-channel SOIC-8 footprint used by the ISO7221 and ISO7420 families. The pinout is standard for TI's 1-channel unidirectional isolators in this package.
Yes. 150 Mbps exceeds the typical 10–50 Mbps SPI clock rates, and the 16 ns propagation delay adds minimal skew. For multi-line SPI (MISO, MOSI, SCLK, CS), you will need one ISO721 per signal or switch to a multi-channel part like the ISO7221.
Yes. The supply range includes 3 V to 3.6 V, so the part runs directly on a 3.3 V rail. It also supports 5 V operation (4.5 V to 5.5 V) on the same pin.