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MAX3232IPW

3.3V dual RS-232 transceiver, 2Tx/2Rx, 250kbps, Enhanced ESD, 16-TSSOP, 4x0.1μF caps

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Manufacturer Part：

MAX3232IPW

Package：

16-TSSOP (5.0x4.4mm)

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Description

Product Overview

The MAX3232IPW from Texas Instruments is a 3.3V-powered, dual-channel RS-232 transceiver with Enhanced ESD protection. It provides two drivers and two receivers, supporting data rates up to 250kbps while meeting TIA/EIA-232-F requirements. Housed in a 16-pin TSSOP package, it requires only four 0.1μF external capacitors for the charge pump, enabling compact designs.

Key Specifications

Category RS-232 Transceiver
Number of Drivers/Receivers 2 / 2
Supply Voltage 3.0V ~ 5.5V
Data Rate 250 kbps
ESD Protection ±15kV HBM (IEC 61000-4-2)
Charge Pump Capacitors 4 x 0.1μF
Operating Temperature -40°C ~ 85°C
Package 16-TSSOP
Part Status Active

Features

  • 3V to 5.5V single supply operation
  • Two drivers and two receivers in one package
  • Enhanced ESD protection: ±15kV HBM on RS-232 pins
  • Only four 0.1μF external capacitors required
  • 250kbps data rate supports standard RS-232 applications
  • Low supply current: 1mA typical
  • Compatible with MAX3232 industry standard pinout
  • Auto-powerdown feature available in some variants

Applications

  • RS-232 serial communication interfaces
  • Embedded system debug ports
  • Industrial automation serial links
  • Point-of-sale terminals
  • Battery-powered RS-232 devices

The MAX3232IPW is a 3.3V-powered, dual-channel RS-232 line driver/receiver from Texas Instruments, designed for true RS-232 communication from a single 3.0V to 5.5V supply. The device integrates two drivers and two receivers with an onboard dual charge pump that generates the required ±5.5V RS-232 voltage levels from the single low-voltage supply. Enhanced ESD protection of ±15kV HBM (per IEC 61000-4-2) on all RS-232 pins provides robust protection against electrostatic discharge events. The device requires only four external 0.1μF charge pump capacitors, minimizing board space. With a typical supply current of 1mA, it is suitable for battery-powered and low-power applications.

The MAX3232IPW uses an integrated dual charge pump to generate ±5.5V supply rails from a single 3.0V to 5.5V input. The charge pump consists of a voltage doubler and a voltage inverter, each requiring two external 0.1μF capacitors. The drivers convert TTL/CMOS logic-level signals to RS-232-compliant voltage levels (±5V minimum swing). The receivers convert RS-232 input signals to TTL/CMOS logic levels with hysteresis for noise immunity. The internal regulation ensures RS-232 output levels remain compliant across the full supply voltage range and under load conditions.

Pin Name Type Description
1 C1+ PWR Charge pump capacitor 1 positive
2 V+ PWR Doubled positive voltage output
3 C1- PWR Charge pump capacitor 1 negative
4 C2+ PWR Charge pump capacitor 2 positive
5 C2- PWR Charge pump capacitor 2 negative
6 V- PWR Inverted negative voltage output
7 DOUT2 O RS-232 driver 2 output
8 RIN2 I RS-232 receiver 2 input
9 ROUT2 O TTL/CMOS receiver 2 output
10 DIN2 I TTL/CMOS driver 2 input
11 DIN1 I TTL/CMOS driver 1 input
12 ROUT1 O TTL/CMOS receiver 1 output
13 RIN1 I RS-232 receiver 1 input
14 DOUT1 O RS-232 driver 1 output
15 GND GND Ground
16 VCC PWR Supply voltage (3.0V-5.5V)
  • Debug UART: RS-232 serial port for embedded system development and field diagnostics
  • Industrial Serial: Communication link between PLCs and legacy serial devices
  • POS Terminals: RS-232 interface for barcode scanners, receipt printers, and cash drawers
  • Battery Devices: Low-power 3.3V RS-232 for portable data loggers
  • Modem Interfaces: DTE/DCE serial communication at up to 250kbps
Model Manufacturer Key Difference
MAX3232CSE Texas Instruments SOIC-16 package variant
SP3232EEN Sipex/Exar Pin-compatible, similar specs
ST3232EBPR STMicroelectronics 3V RS-232, TSSOP-16
ICL3232CPZ Renesas/Intersil Pin-compatible, 250kbps
MAX3221IPW Texas Instruments 1Tx/1Rx, auto-powerdown, lower power
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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