MAX13234EEUP+

Drivers, Receivers, Transceivers Overview

The MAX13234EEUP+ is a dual-transmitter, dual-receiver RS-232 transceiver operating from a +3.0V to +5.5V supply with a logic supply range of +1.62V to VCC. It supports a maximum data rate of 250kbps and features integrated charge pumps requiring four external 0.1µF capacitors. The device includes AutoShutdown Plus technology that reduces supply current to 1µA when inputs are inactive for over 30 seconds. It provides ±15kV Human Body Model ESD protection on all pins and operates within a temperature range of -40°C to +85°C in a 20-pin TSSOP package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated low-voltage logic interface allows direct connection to ASICs and microcontrollers with varying logic levels.
• AutoShutdown Plus feature automatically enters low-power shutdown mode upon cable disconnection or input inactivity exceeding 30 seconds.
• Built-in dual charge-pump circuitry generates required RS-232 voltages using only four small external capacitors.
• Robust electrostatic discharge protection rated at ±15kV HBM on receiver inputs and transmitter outputs.

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix EEUP+ corresponds to the 20-pin TSSOP package variant with a 250kbps data rate limit. Confirm RoHS compliance status matches the '+' designation in the ordering information. Ensure the source document explicitly lists this part number to avoid confusion with the 3Mbps MAX13235E variants.

Drivers, Receivers, Transceivers Selection Notes

Select the MAX13234EEUP+ when interfacing with low-voltage logic systems requiring a separate VL pin for threshold adjustment. This component is suitable for applications needing automatic power management via AutoShutdown Plus. Choose this part over higher-speed variants if the system design prioritizes lower cost or specific timing characteristics associated with the 250kbps guarantee under heavy loading conditions.

Drivers, Receivers, Transceivers Part Context

This component belongs to the MAX1323xE family of high-speed RS-232 transceivers manufactured by Analog Devices/Maxim Integrated. The family shares common architectural features such as the dual charge pump and AutoShutdown Plus functionality. The MAX13234E specifically denotes the 2x2 configuration limited to 250kbps operation, distinguishing it from the MAX13235E which supports up to 3Mbps.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX13235EEUP+ serves as a functional substitute offering identical pinouts and features but with an increased maximum data rate of 3Mbps. Designers must verify that the application timing requirements do not necessitate the specific 250kbps performance profile guaranteed by the MAX13234E under worst-case load conditions.

Drivers, Receivers, Transceivers FAQ

How does the AutoShutdown Plus feature reduce power consumption?

The device monitors receiver and transmitter inputs. If no valid signal transitions occur for more than 30 seconds, the internal charge pumps shut down, reducing the supply current to approximately 1µA until activity resumes.

What is the purpose of the VL pin?

The VL pin accepts a separate logic supply voltage ranging from 1.62V to VCC. It sets the output voltage levels for the receivers and defines the input thresholds for the transmitters, facilitating easy interfacing with various logic families.

Can unused transmitter inputs be left floating?

No, the datasheet specifies that transmitter inputs do not have internal pull-up resistors. Unused inputs should be connected to GND or VL to prevent undefined states.