MAX13450EAUD+

MAX13450EAUD+ is Maxim Integrated’s quad-channel, galvanically isolated digital interface transceiver. It provides four independent data channels that cross the isolation barrier between a microcontroller-side domain and a remote/high-voltage or noisy bus, enabling safe, low-noise communication without external opto-isolators.
Key points
- Four isolated data paths in a compact package; automotive/industrial-grade (EAUD+) with lead-free, extended-temperature specs.
- Built-in isolation barrier and protection features suitable for harsh environments (EMI/noise, transients, undervoltage, fault protection).
- Interfaces commonly support isolated SPI/I2C-style or differential bus styles depending on the design (isolation-friendly data exchange across the barrier).
- Benefits: improves safety and reliability, reduces board area and component count, supports rugged industrial/automotive applications.
Typical applications
- Industrial automation and motor drives
- Power electronics and DC-DC converters
- Automotive ECUs and sensor interfaces
- Any system requiring safe, isolated communication across voltage domains
Note: Refer to the datasheet for exact electrical specs, package options, and recommended operating conditions.

Equivalent parts are other vendors’ quad RS-232 transceivers with 3.3V logic. Examples: TI SP3234E/SP3232E; Analog Devices ADM232A/ADM232E; STMicroelectronics ST232/ST3232. There are other options as well. When selecting, confirm a 4-channel configuration and 3.3V–5V level compatibility.

- Pin count: 28 pins
- Function: Quad RS-232 transceiver (four driver/four receiver channels) with integrated charge-pump level shifters, providing TTL/CMOS input/output to RS-232 signal translation for serial communication.

Manufacturer: Maxim Integrated (now a part of Analog Devices, Inc.).
What kind of company: A global semiconductor company that designs and manufactures analog and mixed-signal integrated circuits.

Typical application areas for MAX13450EAUD+:
- Analog signal routing and multiplexing in data‑acquisition, instrumentation, and medical devices
- Automotive and industrial sensor interfaces (I/O and signal conditioning)
- Consumer electronics for rapid signal selection, audio/video routing, and interface switching
- Test, measurement, and benchtop equipment needing reliable high‑/low‑side switching
- Portable/compact systems requiring low power and small form factor solutions

28-pin LQFP package (lead-free, extended-temperature).