The SP3485 is a 3.3 V powered, half-duplex RS-485/RS-422 transceiver offering up to 10 Mbps data rate, ideal for mixed 3.3 V logic industrial and embedded communication nodes.
Product Overview
The SP3485 is a low-power half-duplex transceiver compliant with the RS-485 and RS-422 (TIA/EIA-485) standards, designed to operate from a single 3.3 V supply. It supports data rates up to 10 Mbps and allows up to 32 transceivers on a shared bus, with independent driver and receiver enable pins for half-duplex control. Its 3.3 V operation makes it the natural fit for modern MCU and FPGA-based designs that run on 3.3 V I/O, replacing 5 V-only transceivers in new board designs.
Newfly supplies verified, RoHS-compliant SP3485-class transceivers with cross-reference and BOM-matching support for production sourcing.
Key Features
- – Single 3.3 V supply (3.0–3.6 V)
- – Half-duplex RS-485 / RS-422
- – Data rate up to 10 Mbps
- – Up to 32 transceivers on the bus
- – Driver and receiver enable controls
- – Low quiescent current
- – SOIC-8 package
- – RoHS-compliant
Technical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 3.3 V (3.0–3.6 V) |
| Standard | RS-485 / RS-422 (TIA/EIA-485) |
| Mode | Half-duplex |
| Data Rate | Up to 10 Mbps |
| Bus Nodes | Up to 32 (unit load; verify with manufacturer datasheet) |
| Operating Temperature | 0°C to +70°C (commercial); -40°C to +85°C (extended, verify variant) |
| Package | SOIC-8 (verify variant) |
| Compliance | RoHS |
Applications
– Industrial communication
– PLC equipment
– 3.3 V embedded systems
– Building automation
– Multi-drop sensor networks
Why Choose Newfly Electronics
– Verified sourcing from ISO9001-certified manufacturers
– MOQ flexibility with small-quantity and prototype sourcing support
– Alternative-part and cross-reference service for standard 3.3 V RS-485 transceivers
– Full-board BOM sourcing to consolidate your component purchasing
– RoHS / REACH documentation support for compliance filing
FAQ
Q: Is the SP3485 compatible with 5 V RS-485 systems?
A: The SP3485 operates from a 3.3 V supply. It shares the same RS-485 bus signaling standard, so it interoperates on a 3.3 V-powered node; for 5 V-only designs consider a 5 V transceiver or level-shifted solution.
Q: How many nodes can share the bus?
A: Up to 32 unit-load transceivers on a single RS-485 bus; confirm your node’s unit load with the datasheet.
Q: What data rate is supported?
A: Up to 10 Mbps in half-duplex mode, depending on cable length and bus loading.
