MAX3158CAI Analog Devices Integrated Circuit (Small Outline Packages) In Stock
MAX3158CAI is a full/half-duplex RS-422/RS-485 transceiver from Analog Devices integrating 1 driver and 1 receiver in a 28-pin SSOP package. It supports multipoint differential data communication at data rates up to 10Mbps with ±15kV ESD protection for robust industrial network designs.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- MAX3158CAI Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MAX3158CAI?
- Supports both RS-422 full-duplex and RS-485 half-duplex modes in a single 28-pin SSOP package
- ±15kV ESD protection on bus pins for robust installation in industrial and field-bus environments
- Data rates up to 10 Mbps for high-throughput RS-485 multipoint network architectures
- Low-power shutdown mode reduces supply current to under 1 µA for battery-backed equipment
What is MAX3158CAI used for?
The MAX3158CAI is designed for industrial automation networks, building-management systems, and distributed control systems that use RS-485 or RS-422 differential buses to communicate over distances up to 1200 meters. Its ability to switch between full-duplex RS-422 and half-duplex RS-485 modes in software makes it a flexible drop-in for multi-protocol industrial gateways and PLC I/O modules. The ±15kV ESD-hardened bus pins protect the transceiver from surge events caused by long cable runs and external lightning coupling in outdoor or factory-floor installations.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the MAX3158CAI datasheet?
MAX3158CAI Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for MAX3158CAI?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the MAX3158CAI support both RS-422 and RS-485 protocols without requiring two separate transceiver ICs?
The MAX3158CAI integrates a 1-driver / 1-receiver architecture with separate driver-enable and receiver-enable pins, allowing the same 28-pin SSOP device to operate in RS-422 full-duplex mode (driver always on, receiver always on) or RS-485 half-duplex mode (driver and receiver alternately enabled by a GPIO). This eliminates the second transceiver IC that a single-protocol design would need, saving 1 chip and 8-10 bypass capacitors per port in a multi-protocol gateway.
What cable length and data-rate trade-offs does the MAX3158CAI support for RS-485 industrial networks?
RS-485 networks using the MAX3158CAI can reach 10 Mbps over short cables of 15 meters or less, while longer runs of up to 1200 meters are achievable at 100 kbps by reducing the baud rate to match the cable's RC time constant. The differential signaling rejects common-mode noise on the bus to ±7V, enabling reliable communication across the factory floor where ground potential differences between nodes often reach 1-2V without disrupting data integrity.
How does ±15kV ESD protection on MAX3158CAI bus pins reduce field-installation failure risk?
Industrial RS-485 cables routed through conduit or trays accumulate static charges that can discharge as ±8kV to ±15kV spikes when a technician plugs or unplugs a connector. The MAX3158CAI's ±15kV Human Body Model (HBM) bus-pin ESD protection absorbs these surges without clamping or latching, surviving events that would permanently damage a standard transceiver rated to only ±2kV. Field data from industrial installer surveys show that bus-pin ESD is the leading cause of RS-485 transceiver failures; the ±15kV rating directly addresses this reliability gap.
When is the MAX3158CAI a practical alternative to a lower-pin-count RS-485 transceiver like a MAX485?
The MAX3158CAI is the correct choice when a design needs both full-duplex RS-422 on some ports and half-duplex RS-485 on others from a single component, or when the bus environment has ESD threats exceeding the ±2kV rating typical of small-outline 8-pin transceivers. The 28-pin SSOP package also provides additional configuration and diagnostic pins not available on an 8-pin device, which benefits complex multi-drop protocols like PROFIBUS-DP or Modbus RTU requiring precise bus-termination and failsafe bias control.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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