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3- to 5.5-V dual channel 250kbps RS-232 line driver/receiver with +/-15-kV IEC-ESD protection

MAX3232ECDBR General Description

Maxim Integrated's MAX3232ECDBR is a compact and reliable RS-232 transceiver IC designed for seamless communication between microcontrollers, computers, and peripherals. Operating within a voltage range of 3.0V to 5.5V, this versatile IC caters to a spectrum of applications, from low-power setups to standard configurations. Its dual drivers and receivers allow for bidirectional communication on two lines, while integrated capacitors for charge pump operation streamline circuit design. With ESD protection up to ±15kV on its RS-232 interface pins, the MAX3232ECDBR ensures durability in harsh industrial environments. Packaged in a space-saving 16-pin TSSOP, this IC is favored for its reliability, adaptability, and ease of integration across various industries

Key Features

  • ESD protection for RS-232 bus pins
    • ±15 kV (HBM)
    • ±8 kV (IEC61000-4-2, Contact discharge)
    • ±15 kV (IEC61000-4-2, Air-gap discharge)
  • Meets or exceeds the requirements of TIA/EIA-232-F and ITU V.28 standards
  • Operates with 3-V to 5.5-V VCC supply
  • Operates up to 250 kbit/s
  • Two drivers and two receivers
  • Low supply current: 300 µA (typical)
  • External capacitors: 4 × 0.1 µF
  • Accepts 5-V logic input with 3.3-V supply
  • Pin compatible to alternative high-speed devices (1 Mbit/s)
    • SN65C3232E (–40°C to +85°C)
    • SN75C3232E (0°C to 70°C)


Logic voltage (min) (V) 3.3 Data rate (max) (MBps) 0.25
Main supply voltage (nom) (V) 3.3, 5 ESD HBM (kV) 15
Rating Catalog Operating temperature range (°C) -40 to 85, 0 to 70
Vout (typ) (V) 5.4

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AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

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