The MAX13430EEUB+T belongs to Maxim's MAX13430E-MAX13433E family of RS-485/RS-422 transceivers with a low-voltage logic interface, designed for operation in multivoltage systems. A dual-supply structure decouples the logic and bus sides: V_L sets the logic-pin levels (down to +1.62V) so the device talks directly to low-voltage ASICs, FPGAs and PLDs, while V_CC powers the +3V to +5V RS-485 bus side.

The MAX13430E is half-duplex (one driver and one receiver sharing the A/B bus pins) with data rates up to 0.5Mbps; its reduced slew-rate driver minimizes EMI and reflections from improperly terminated cables. Hot-swap input structures on DE and RE prevent erroneous bus states during live insertion, and up to 256 transceivers can share the bus.

Robust protection includes ±15kV Human Body Model ESD on the RS-485 I/O pins (A and B), ±15kV / ±8kV IEC61000-4-2 air-gap/contact, plus thermal shutdown and a 1µA shutdown mode (10µA typical low-current). The result is a rugged, low-voltage-friendly RS-485 link for industrial control, motor control and HVAC equipment in a 10-pin µMAX.

Note: Refer to the official Maxim MAX13430E-MAX13433E datasheet for full electrical parameters. Subject to change without notice; verify all parameters before final design.

The MAX13430EEUB+T is supplied in the 10-pin µMAX package, indicated by the EUB suffix; a 10-pin TDFN-EP option (EET) is also offered, and the full-duplex MAX13432E/MAX13433E use a 14-pin body. The compact µMAX suits dense low-voltage industrial boards.

The "+" suffix indicates lead-free, RoHS-compliant finish and the "T" suffix tape-and-reel packing. Standard 10-lead µMAX land patterns and reflow profiles apply; bypass V_L and V_CC with 0.1µF (plus 1µF near V_CC for ESD) to GND, and terminate the A/B bus at both ends (e.g. 120Ω). The diagram below shows a typical half-duplex RS-485 network.

The MAX13430E uses a 10-pin µMAX pinout (top view):

• Pin 1 - VL: Logic-side supply (+1.62V to +5V); sets logic-pin levels. Bypass 0.1µF to GND.
• Pin 2 - RO: Receiver output (RE low: A-B ≥ -50mV gives RO high; ≤ -200mV gives RO low).
• Pin 3 - DE: Driver output enable, active-high (low = shutdown).
• Pin 4 - RE: Receiver output enable, active-low (high = shutdown). Hot-swap.
• Pin 5 - DI: Driver input.
• Pin 6 - GND / Pin 7 - N.C.: Ground / no connect.
• Pin 8 - A / Pin 9 - B: Non-inverting (A) and inverting (B) RS-485 bus pins (±15kV ESD).
• Pin 10 - VCC: Bus-side supply (+3V to +5V); bypass 1µF + 0.1µF to GND.

Power the logic side from V_L (matching the MCU rail) and the bus side from V_CC; tie RE/DE to a direction line, and terminate A/B at both ends. Confirm the exact pin assignment against the datasheet image below before layout.

The following parts are listed for reference. Verify duplex, logic supply, data rate and package before substituting.

Maxim Integrated, now part of Analog Devices (NASDAQ: ADI), is a leading supplier of analog and mixed-signal semiconductors, well known for rugged RS-485/RS-422 and interface transceivers. The MAX13430E-MAX13433E family adds a low-voltage logic interface to ±15kV ESD-protected RS-485, easing multivoltage industrial designs.

Maxim/ADI provides complete datasheets, application notes and long-term supply, with authorized distribution and technical support across China for both prototype and volume programs.