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MAX3232ESE

3.3V RS-232 transceiver, 2Tx/2Rx, 250kbps, ±15kV ESD, SOIC-16

11800

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Pieza del fabricante：

MAX3232ESE

Paquete：

SOIC-16 (10.3 x 7.5 x 2.35mm, 1.27mm pitch)

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Descripción

Productos

The MAX3232ESE is a 3.3V-powered RS-232 transceiver from Analog Devices (Maxim) with dual driver/receiver, 250kbps data rate, and ESD protection up to ±15kV in a 16-pin SOIC package.

Especificaciones

Number of Drivers 2
Number of Receivers 2
Tensión de alimentación 3.0V to 5.5V
Velocidad de datos 250kbps (max)
ESD Protection ±15kV HBM on RS-232 pins
Charge Pump Dual, requires 4 external 0.1µF capacitors
Output Voltage Swing ±5.4V typical (at 3.3V supply)
Receiver Input Threshold 0.6V min, 2.4V max (TTL/CMOS)
Driver Output Current Short-circuit protected
Supply Current 1mA typical (no load)
Shutdown Mode 1µA (MAX3232E variant)
Temperatura de funcionamiento -40°C to +85°C
Paquete SOIC-16 (10.3 x 7.5mm)

Características

  • Operates from single 3.0V to 5.5V supply
  • Meets EIA/TIA-232 and V.28 specifications
  • ±15kV ESD protection on RS-232 pins (HBM)
  • Requires only four 0.1µF external capacitors
  • 250kbps data rate for high-speed RS-232 communication
  • Low 1mA supply current in normal operation
  • Guaranteed 120kbps with worst-case load
  • Slew-rate controlled drivers reduce EMI

Aplicaciones

  • RS-232 serial communication interfaces
  • Microcontroller UART-to-RS232 conversion
  • Battery-powered data logging systems
  • Industrial serial communication links
  • Point-of-sale terminals and modems

The MAX3232ESE is a 3.3V-powered RS-232 transceiver from Analog Devices (Maxim Integrated) that provides two drivers and two receivers for full-duplex RS-232 communication. The internal dual charge pump generates ±5.4V RS-232 output levels from a single 3.0V to 5.5V supply using only four external 0.1µF capacitors. The device supports data rates up to 250kbps and provides ±15kV ESD protection on the RS-232 interface pins, meeting IEC 1000-4-2 requirements. The E-variant (enhanced) is rated for the extended -40°C to +85°C operating temperature range. Slew-rate controlled drivers reduce electromagnetic interference while maintaining compatibility with standard RS-232 receivers.

The MAX3232ESE converts TTL/CMOS logic levels to RS-232 voltage levels and vice versa using an internal dual charge pump and level-shifting circuitry. The charge pump uses a switched-capacitor voltage inverter and doubler to generate +5.4V (V+) and -5.4V (V-) from the 3.3V VCC supply, requiring four external 0.1µF capacitors (C1-C4). The driver circuits translate the 0-3.3V TTL input to ±5.4V RS-232 output levels by switching between the V+ and V- rails. Slew-rate limiting on the driver outputs controls the rise and fall times to approximately 30V/µs, limiting high-frequency spectral content and reducing EMI while maintaining adequate signal integrity at 250kbps. The receiver circuits convert RS-232 input levels (±3V to ±15V) to 0-3.3V TTL/CMOS output levels using a comparator with a threshold between 0.6V and 2.4V. The 1µA shutdown mode (E-variant) disables the charge pump and drivers to conserve battery power in portable applications.

Pin Nombre Tipo Descripción
1 C1+ Charge Pump Capacitor C1 positive terminal
2 V+ Charge Pump +5.4V generated voltage
3 C1- Charge Pump Capacitor C1 negative terminal
4 C2+ Charge Pump Capacitor C2 positive terminal
5 C2- Charge Pump Capacitor C2 negative terminal
6 V- Charge Pump -5.4V generated voltage
7 DOUT2 RS-232 Output Driver 2 RS-232 output
8 RIN2 RS-232 Input Receiver 2 RS-232 input
9 ROUT2 TTL Output Receiver 2 TTL/CMOS output
10 DIN2 TTL Input Driver 2 TTL/CMOS input
11 DIN1 TTL Input Driver 1 TTL/CMOS input
12 ROUT1 TTL Output Receiver 1 TTL/CMOS output
13 RIN1 RS-232 Input Receiver 1 RS-232 input
14 DOUT1 RS-232 Output Driver 1 RS-232 output
15 GND Potencia Suelo
16 VCC Potencia Supply voltage (3.0V-5.5V)
  • MCU UART Interface: Converts 3.3V MCU UART TX/RX to RS-232 levels for communication with legacy serial devices
  • Industrial Serial Links: ±15kV ESD protection and ±5.4V output swing ensure reliable communication in electrically noisy environments
  • Battery-Powered Systems: 1mA supply current and optional 1µA shutdown conserve battery in portable data loggers
  • Point-of-Sale: Dual driver/receiver supports full-duplex communication with receipt printers and barcode scanners
  • Embedded Debug Ports: Simple 4-capacitor external circuit provides RS-232 debug console from 3.3V MCU
Modelo Fabricante Diferencia clave Paquete Specs
MAX232CPE ADI 5V-only original version with 2Tx/2Rs and 120kbps rate in DIP-16 for legacy 5V systems DIP-16 120kbps/5V
SP3232EBCN-L/TR Laboratorios Silicon 3.3V/5V equivalent with auto-powerdown and ±15kV ESD protection on bus pins DIP-16 250kbps/3-5.5V
ST3232EBPR ST 3-5.5V RS-232 with enhanced ±15kV IEC ESD and low 300µA supply current TSSOP-16 250kbps/3-5.5V
TRS3232EIPWR TI Pin-compatible 3-5.5V RS-232 with 1µA auto-powerdown and ±15kV HBM ESD rating TSSOP-16 250kbps/3-5.5V
MAX3243CAI+T ADI 3Tx/5Rs triple-channel version for multi-port serial applications in SSOP-28 SSOP-28 250kbps/3-5.5V

MAX3232ESE is a 3.3-5.5V dual RS-232 transceiver in SOIC-16 with 2Tx/2Rx, 250kbps data rate, and ±15kV ESD protection. It replaces the 5V-only MAX232 for mixed-voltage systems. SP3232 and ST3232 are pin-compatible alternatives. Only four 0.1µF charge pump capacitors are required (vs 1µF for MAX232). For single-port designs, MAX3221 provides 1Mbps in a smaller package.

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