Analog Devices Inc./Maxim Integrated MAX3491ESD+T
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mfr | Analog Devices Inc./Maxim Integrated |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Type | Transceiver |
| Data Rate | 10Mbps |
| Receiver Hysteresis | 50 mV |
| Supplier Device Package | 14-SOIC |
| Voltage - Supply | 3V ~ 3.6V |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| Package | Tape & Reel (TR) |
| Product Status | Active |
| Base Product Number | MAX3491 |
| REACH Status | REACH Unaffected |
| Standard Package | 2,500 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
MAX3491ESD+T 1/1 Transceiver Full RS422, RS485 14-SOIC
The MAX3491ESD+T is a high-speed, ±15kV ESD-protected, RS-485/RS-422 compliant transceiver from Analog Devices (formerly Maxim Integrated), engineered for demanding industrial communication systems requiring robust data transmission. This advanced IC delivers data rates up to 25Mbps while operating from a single 3.3V power supply, making it particularly suitable for modern low-voltage industrial networks, motion control systems, and building automation. The device features industry-leading ±15kV ESD protection on bus pins (per IEC 61000-4-2) and incorporates True Fail-Safe receiver inputs that guarantee a logic-high output under open-circuit, short-circuit, or idle-bus conditions, eliminating the need for external bias resistors. With its 1/8-unit-load receiver input impedance, the MAX3491ESD+T supports up to 256 transceivers on a single bus, while the driver output slew-rate control minimizes EMI in sensitive applications without sacrificing data throughput.
The MAX3491ESD+T integrates thermal shutdown protection and short-circuit current limiting on driver outputs, ensuring reliable operation in harsh electrical environments. Its low-power shutdown mode (consuming just 0.1μA typical) combined with receiver active-disable function enables sophisticated power management in battery-powered field devices. The transceiver's wide common-mode voltage range (-7V to +12V) allows robust communication despite significant ground potential differences between network nodes, while the high-impedance receiver inputs maintain signal integrity in electrically noisy environments. Packaged in a compact 14-pin SOIC (150mil), the device operates across the industrial temperature range (-40°C to +85°C) and is fully compliant with TIA/EIA-485-A and ISO 8482 standards. Analog Devices provides comprehensive reference designs and layout guidelines for implementing high-speed RS-485 networks in motor control systems, industrial PLCs, and renewable energy monitoring equipment.
Alternative Models & Key Features:
● MAX3485ESA+: 12Mbps version with similar protection features in 8-pin SOIC
● SN65HVD72DR: TI's 3.3V alternative with 25Mbps speed and different ESD protection
● ADM3485ARZ: Analog Devices' 12Mbps transceiver with reduced supply current
● ISL81487IBZ: Renesas' ±42V protected 50Mbps transceiver for extreme environments
● THVD1450DR: TI's next-gen 50Mbps transceiver with IEC-compliant ESD protection
