Discover reliable RS232 to TTL level shifter modules ideal for Arduino, Raspberry Pi, and other microcontrollers. This guide highlights five versatile options, summarizing key features to help you choose a board that matches your baud, voltage, and connection needs.
| Product | Brand | Voltage Range | Baud Support | Connection Type |
|---|---|---|---|---|
| ANMBEST 2PCS MAX3232 3.3V to 5V DB9 Male RS232 to TTL | ANMBEST | 3.3V–5V | 300–115200 | TX/RX/GND/VCC; RS232 to TTL |
| HiLetgo 10pcs Mini RS232 to TTL MAX3232 | HiLetgo | 3V–5V | High range (MAX3232CSE) | TX/RX/GND/VCC; RS232 to TTL |
| NOYITO TTL to RS232 Module Male Female | NOYITO | 3–5.5V | Standard RS232 rates | Male/Female; TTL to RS232 |
| GODIYMODULES 10PCS Mini RS232 to TTL MAX3232 | GODIYMODULES | 3V–5V | Up to ~120 KBPS (recommended) | TTL to RS232 |
| HiLetgo 5pcs RS232 to TTL MAX3232 | HiLetgo | 3.3V–5V | Multiple baud options | VCC/GND/RXD/TXD; RS232 to TTL |
ANMBEST MAX3232 RS232 To TTL Converter Module (2 Pack)
These modules use the MAX3232 IC to translate RS232 signals to TTL compatible levels. Operating between 3.3V and 5V, they provide bidirectional data communication up to 115.2 Kbps. The kit includes DB9 compatibility, allowing direct connection to traditional RS232 serial devices and integration with Arduino or Raspberry Pi serial pins. Interfaces include TX, RX, GND, and VCC for straightforward wiring.
HiLetgo 10pcs Mini RS232 To TTL MAX3232
HiLetgo’s 10-piece set centers on the MAX3232-based TTL to RS232 conversion. It supports a voltage range of 3V to 5V, making it compatible with common microcontroller platforms. The compact boards are suitable for prototyping and bulk projects where multiple serial connections are needed. They provide reliable level shifting with straightforward pinouts for easy soldering and integration.
NOYITO TTL to RS232 Module
NOYITO’s module targets simple TTL to RS232 level conversion with RS232 port options, including Male or Female connectors. It supports 3–5.5V power supplies and includes 15KV ESD protection for improved resilience in noisy environments. This board is well-suited for PC communication and embedded projects requiring RS232 compatibility with TTL logic devices.
GODIYMODULES 10PCS RS232 To TTL MAX3232
This bulk set from GODIYMODULES provides ten MAX3232-based level shifter boards. They operate from 3V to 5V and are designed for fast prototyping with high baud rates, though caution is advised for extremely high speeds beyond 120 KBPS. They’re suitable for hobbyists and labs needing multiple converters for various RS232 peripherals.
HiLetgo 5pcs RS232 To TTL MAX3232
HiLetgo’s five-pack offers a compact MAX3232-based RS232 to TTL conversion solution. With an operating range of 3.3V–5V and four interface pins (VCC, GND, RXD, TXD), these boards are ideal for quick hardware integrations with Arduino, Raspberry Pi, or other microcontrollers needing RS232 compatibility.
UMLIFE 3pcs TTL to RS232 Module
UMLIFE’s three-pack focuses on mutual conversion between TTL and RS232 levels. It supports 3–5.5V operation and targets MCU, ARM, and FPGA projects where TTL serial ports must communicate with RS232 devices. This solution facilitates serial expansion for developers building PC-connected embedded systems.
Buying Guide
- Voltage compatibility: Most modules operate at 3.3V–5V. Ensure your microcontroller’s logic level matches the converter’s voltage to avoid damage and ensure reliable signal integrity.
- Baud rate support: Common devices run up to 115.2 Kbps or higher. If your project demands high-speed data, verify the maximum stable baud rate for the specific board and wiring length.
- Interface and wiring: Check for essential pins (VCC, GND, TXD, RXD). Some modules include DB9 connectors or gender options; confirm compatibility with your RS232 peripherals.
- Protection features: ESD protection and robust housing help protect devices in lab or workshop environments, especially with long cable runs.
- Quantity and cost: For large projects, bulk packs reduce per-unit cost. Consider whether you need labeled boards or multi-pack sets for rapid prototyping.
- Connector compatibility: If you require DB9 male/female or PCB mount, confirm the specific connector type and mounting style to avoid mismatches.
- Power safety: Some boards supply power from the MCU through VCC; ensure your source can safely deliver the required current without sagging voltage.
| Consideration | What To Look For |
|---|---|
| Voltage range | Most modules work at 3.3V–5V. Confirm your MCU level and supply to prevent misreads. |
| Baud rate | Choose a module that supports your target baud rate with stable performance. |
| Connectors | RS232 DB9 compatibility, male/female options, and TTL pins vary by board. Match your peripheral needs. |
| Protection | ESD protection and robust design reduce risk in development environments. |
| Quantity | Bulk packs lower unit cost; pick a set that aligns with your project scale. |