MAX13235EEUP+

Drivers, Receivers, Transceivers Overview

The MAX13235EEUP+ is a dual RS-232 transceiver from the MAX13234E–MAX13237E family, designed for high-speed serial communication. It supports data rates up to 3Mbps and operates on a single +3V to +5.5V supply voltage. The device features an integrated low-voltage logic interface (VL) ranging from 1.62V to VCC, facilitating direct connection to modern microcontrollers and ASICs. It includes AutoShutdown Plus technology that reduces supply current to 1µA when idle. The component provides ±15kV Human Body Model ESD protection on all pins and utilizes an internal charge pump requiring only four external 0.1µF capacitors.

Drivers, Receivers, Transceivers Feature Summary

• AutoShutdown Plus functionality automatically enters low-power shutdown mode after 30 seconds of inactivity or cable disconnection, reducing power consumption significantly.
• Integrated low-voltage logic interface allows flexible interfacing with UARTs and communication controllers operating at various logic levels between 1.62V and VCC.
• Robust electrostatic discharge protection rated at ±15kV HBM and ±8kV IEC 61000-4-2 contact discharge ensures reliability during handling and operation.
• Internal dual charge-pump circuitry generates required RS-232 voltages using minimal external components, saving board space.

Drivers, Receivers, Transceivers Applications

• Telematics systems
• GPS navigation modules
• Industrial control equipment
• Point-of-sale (POS) terminals

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and RoHS compliance status. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Confirm availability for the TSSOP-20 variant as inventory levels fluctuate. Cross-reference the full part number including the lead-free designation to match exact specifications.

Drivers, Receivers, Transceivers Selection Notes

Select this component when a dual-channel RS-232 interface is required with high data throughput up to 3Mbps. It is suitable for designs needing low standby power through automatic shutdown features. Choose this part if the system requires robust ESD protection without additional external components. Ensure the host logic supply voltage falls within the specified range for the VL pin to maintain correct signal thresholds.

Drivers, Receivers, Transceivers Part Context

This device belongs to the MAX1323xE series of 3Mbps RS-232 transceivers. It shares architectural similarities with the MAX13234E, MAX13236E, and MAX13237E, differing primarily in data rate capabilities and channel configuration. The MAX13235E specifically offers 2x2 drivers and receivers optimized for higher speed applications compared to the 250kbps variants in the same family.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX13234EEUP+ serves as a lower-speed alternative within the same package. The MAX13235EETP+ offers identical electrical performance but utilizes a TQFN-EP package instead of TSSOP. Designers must verify pin compatibility and thermal requirements when substituting between package types.

Drivers, Receivers, Transceivers FAQ

How does the AutoShutdown Plus feature determine when to enter low-power mode?

The device monitors receiver and transmitter inputs. If no valid signal transitions are detected on any input for more than 30 seconds, the onboard charge pumps shut down, reducing supply current to 1µA.

What is the function of the FORCEOFF and FORCEON pins?

FORCEOFF forces the device into hardware-controlled shutdown regardless of input activity. FORCEON overrides automatic shutdown to keep the transmitters active. These pins provide manual control over the device's operational state.

Can the MAX13235EEUP+ operate with a 3.3V logic supply?

Yes, the device supports a separate logic supply (VL) ranging from 1.62V to VCC. Connecting VL to a 3.3V source allows proper interfacing with 3.3V logic devices while the main supply (VCC) also operates within the 3V to 5.5V range.