MAX3232ECDG4

Overview

The MAX3232ECDG4 is a dual RS-232 transceiver manufactured by Texas Instruments, designed for single-supply operation between 3V and 5.5V. It integrates two drivers and two receivers with a dual charge-pump circuit that generates ±9V internal levels from the single supply using four external capacitors. The device supports data rates up to 250kbit/s and features ±15kV IEC ESD protection on all serial-port connection pins. It operates within an industrial temperature range of -40°C to +85°C and consumes a typical standby current of 300μA.

Feature Summary

• Dual charge-pump architecture enables full RS-232 performance from a single low-voltage power source without requiring negative voltage rails.
• Integrated ±15kV IEC electrostatic discharge protection provides robust safeguarding for serial port connections against static events.
• Low standby current consumption facilitates extended battery life in portable and handheld equipment applications.

Applications

• Industrial PCs
• Wired networking systems
• Data center and enterprise computing infrastructure
• Battery-powered portable devices

Procurement Notes

Verify the specific suffix 'ECDG4' corresponds to the TSSOP-16 package and industrial temperature grade (-40°C to +85°C). Confirm RoHS compliance and lead finish specifications via the latest TI orderable information addendum before procurement.

Selection Notes

Select this component when designing systems requiring dual-channel RS-232 communication with high ESD tolerance. Ensure the design accommodates four external capacitors for the charge pump and verify logic input compatibility if interfacing with 5V microcontrollers while powered at 3.3V.

Part Context

This part belongs to the MAX3232 family of multichannel RS-232 line drivers and receivers. It serves as a standard interface solution for converting TTL/CMOS logic levels to RS-232 standards in compact embedded designs.

Replacement Considerations

The SNx5C3232 is identified as a pin-compatible alternative offering higher speed capabilities up to 1Mbit/s. Verify functional equivalence regarding ESD ratings and capacitor requirements when substituting.

FAQ

Does the MAX3232ECDG4 require a negative voltage supply?

No, the device utilizes an internal dual charge-pump circuit to generate the necessary negative voltage internally, allowing operation from a single 3V to 5.5V positive supply.

What is the maximum data signaling rate supported?

The device supports data signaling rates up to 250kbit/s under recommended operating conditions.

How many external capacitors are required for proper operation?

Four small external capacitors (typically 0.1μF) are required to support the dual charge-pump circuit.