The 1 Mbps data rate is the ceiling for this part — adequate for isolated SPI at moderate clock speeds or UART links. If your design needs higher rates, this is not the right isolator.
There is no NRND flag or last-time-buy window.
MAX14931AASE+ Digital Isolator, 1 Mbps, 2750 Vrms, 16-SOIC
MPNMAX14931AASE+
End of Life
Maxim Integrated MAX14931AASE+, General Purpose digital isolator, Capacitive Coupling, 4 Channel, Unidirectional, 2750 Vrms, 1 Mbps, 16-SOIC (0.295", 7.50mm Width), -40°C ~ 125°C.
$4.58Ref. price · indicative, final on quote
Packaging16-SOIC (0.295", 7.50mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Type | General Purpose |
| Channel type | Unidirectional |
| Mounting | Surface Mount |
| Supply voltage | 1.71V ~ 5.5V |
| Voltage - isolation | 2750Vrms |
| Isolated power | No |
| Operating temperature | -40°C ~ 125°C |
| Pulse width distortion | 4.5ns |
| Package | Tube |
| Data rate | 1Mbps |
| Technology | Capacitive Coupling |
| Case | 16-SOIC (0.295\", 7.50mm Width) |
| Channels | 4 |
| Inputs - side 1/Side 2 | 3/1 |
| Rise (Fall time) | 2ns, 2ns |
| Propagation delay tpLH (tpHL) | 54.1ns, 55.3ns |
| Common mode transient immunity | 25kV/µs (Typ) |
Product details
Frequently asked questions
What is the maximum data rate supported by MAX14931AASE+?
The MAX14931AASE+ supports a maximum data rate of 1 Mbps. This is suitable for isolated SPI, UART, and slow fieldbus links, but not for high-speed interfaces like USB or gigabit Ethernet.
Does MAX14931AASE+ work with both 3.3V and 5V logic?
Yes, the supply range on each side is 1.71 V to 5.5 V, so it operates directly with 3.3 V and 5 V logic without external level translation.
Does MAX14931AASE+ require an external supply?
No, the MAX14931AASE+ does not include an integrated isolated DC-DC converter. Each side of the isolation barrier needs its own supply rail within the 1.71 V to 5.5 V range.
What is the common-mode transient immunity (CMTI) for MAX14931AASE+?
The typical common-mode transient immunity is 25 kV/µs. This rating ensures reliable data transmission in high-dv/dt environments such as motor drives and switching power supplies.