RS232 to TTL moduleSKU 2091

Sensors & Modules

RS232 to TTL module

₹80

01 — About

What it does

The RS232 to TTL Module converts RS232 serial signals to TTL levels for microcontroller interfacing. It bridges legacy RS232 equipment with modern 3.3V/5V microcontrollers for communication with computers, PLCs, and industrial serial devices.

Key features

  • RS232 to TTL level conversion
  • Bi-directional communication
  • 3.3V and 5V compatible TTL side
  • Standard DB9 connector for RS232 equipment
  • Baud rates up to 115200 bps
  • Compact module with LED indicators
  • MAX3232 or similar IC on board

Good to know

  • Verify TTL voltage level matches your microcontroller (3.3V or 5V)
  • MAX3232 supports both 3.3V and 5V; MAX232 is 5V only
  • Null modem may be needed for direct PC-to-PC connection
  • RTS/CTS hardware flow control pins may not be connected
  • DB9 pinout: Pin 2=RX, Pin 3=TX, Pin 5=GND (standard)

02 — Datasheet

Specifications

08
IC
MAX3232 or equivalent
RS232 Side
±5V to ±15V (standard)
TTL Side
3.3V – 5V
Max Baud Rate
115200 bps (up to 250kbps)
Channels
2 (TX + RX)
Interface
DB9 female (RS232), 4-pin header (TTL)
Operating Voltage
3.3V – 5V
Dimensions
35mm x 20mm