SystemBase SB300 Advanced Serial Multi-Protocol RS232/RS422/RS485 Transceiver

Product Description

The SystemBase SB300 is the most advanced multi-protocol serial transceiver available, combining RS232, RS422, and RS485 interfaces into a single, compact QFN-40 chip. With intelligent auto direction control, integrated termination, high-speed 10Mbps performance, and robust electrostatic discharge (ESD) protection, the SB300 is engineered for OEMs, integrators, and industrial users who demand maximum flexibility and reliability in their serial communication designs.

Key Features

🔄 Multi-Protocol Excellence

• Three serial protocols in one chip: RS232, RS422, and RS485
• Simple pin-selectable mode switching - no external components required
• Pin-to-pin compatible with MaxLinear SP339E for easy upgrades
• Supports both full-duplex and half-duplex communication modes

⚡ High-Performance Communication

• Maximum data rate: 10 Mbps (RS422/RS485), 1 Mbps (RS232)
• Support for up to 256 nodes on RS422/RS485 bus (1/8-unit load receiver)
• Ultra-compact 6mm x 6mm QFN-40 package design
• Communication range up to 1.2km with proper termination

🎯 Intelligent Auto Direction Control

• Automatic DE/RE control eliminates manual RS422/RS485 direction switching
• No software control required - simply send and receive data
• Manual mode available for legacy system compatibility
• Unique feature not available in competing solutions

🛡️ Industrial-Grade Protection

• ESD protection: ±8kV HBM on serial interface pins
• ±4kV IEC 61000-4-2 contact discharge protection
• Operating temperature: -40°C to +85°C
• Built-in selectable 120Ω termination resistor

Technical Specifications

Interface Support:

• RS232: 3 Drivers, 5 Receivers (full modem support)
• RS422/RS485: 1 Driver, 1 Receiver
• Mode selection via MODE[1:0] pins

Operational Modes:

• MODE[1:0] = 01: RS232 Full Duplex
• MODE[1:0] = 11: RS422 Full Duplex
• MODE[1:0] = 10: RS485 Non-Echo Half Duplex
• MODE[1:0] = 00: RS485 Echo Half Duplex

Electrical Characteristics:

• Supply Voltage: 3.3V or 5.0V ±5%
• Supply Current: 1-5mA (depending on mode)
• Maximum Distance: 1.2km (RS422/RS485 modes)
• Package: QFN-40 (6mm x 6mm)

Additional Features:

• Selectable slew rate limiting (250kbps for reduced EMI)
• Large output swing for RS232 (±10V no load)
• Fail-safe operation with external pull-up/pull-down resistors
• RoHS compliant

Applications

Perfect for a wide range of industrial and commercial applications:

• Industrial Controls & Automation
• Utility Meters & Smart Grid
• Industrial Motor Drives
• Lighting Control Systems
• Telecommunications Equipment
• Security Systems
• Instrumentation & Test Equipment
• Point-of-Sale Equipment
• Device Servers & Networking
• Serial Communication Cards

What's Included

• 1x SystemBase SB300 IC (QFN-40 package)
• Online technical documentation and datasheet
• Application notes and reference circuits
• PCB layout guidelines

Why Choose the SB300?

Compared to traditional serial transceivers:

• Ultimate Flexibility - Three protocols in one chip vs. single-protocol solutions
• Space Saving - Replaces multiple discrete transceivers
• Auto Direction Control - Unique feature eliminates external control logic
• Higher Performance - 10Mbps vs. typical 1-2Mbps solutions
• Industrial Grade - Superior ESD protection and temperature range
• Cost Effective - Reduces BOM cost and PCB real estate

Perfect for:

• Multi-protocol communication systems
• Flexible serial interface designs
• Industrial automation equipment
• Upgrading existing single-protocol designs
• Space-constrained applications requiring multiple serial standards

Competitive Advantage

Technical Support & Documentation

• SB300 Datasheet (PDF)
• SB300 Feature Summary (PDF)
• SB300 Product Brief (PDF)
• Application Note #1: Maxlinear SP339E/B to SB300 System Rollover Guide
• Application Note #2: The RS-232, RS-422, and RS-485 Multi-protocol Transceiver Design Guide using the SB300
• Application Note #3: Advantages of using the SystemBase SB300 Multi-Protocol Transceiver
• Application Note #4: Converters and Repeaters with the SystemBase SB300 Multi-Protocol Transceiver

For additional technical information and support, visit: SystemBase SB300 Official Website.

Please Contact Us for Quantity and OEM discounts

Note: This is an IC component requiring PCB integration. Suitable for electronics manufacturers, system integrators, and advanced hobbyists with PCB design capabilities.