Product Details
Devices in the MAX3483AE family (MAX3483AE/MAX3485AE/MAX3488AE/MAX3490AE/MAX3491AE) are ±20kV ESD-protected RS-485/422 transceivers, optimized for extended cable runs in noisy environments. All devices operate from a single 3.3V supply.
The MAX3483AE and MAX3485AE are half-duplex transceivers. The MAX3488AE, MAX3490AE, and MAX3491AE are full-duplex transceivers. The MAX3483AE/85AE have a 1-unit load receiver input impedance, allowing up to 32 transceivers on the bus. The MAX3488AE/90AE/91AE have a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. Each transceiver includes a fail-safe receiver, ensuring that the receiver output (RO) is high when inputs are shorted, open, or connected to a three-state bus.
The MAX3483AE, MAX3485AE, MAX3488AE, and MAX3490AE are available in industry standard 8-pin SO package, while the MAX3491AE is available in a 14-pin SO package.
Key Features
- Integrated Protection Increases Robustness
- High ESD Protection
- ±20kV HBM ESD per JEDEC JS-001-2012
- ±15kV Air Gap per IEC 61000-4-2
- ±8kV Contact ESD per IEC 61000-4-2
- Short-Circuit Protected Outputs
- True Fail-Safe Receiver Prevents False Transition on Receiver Input Short or Open Events
- Hot-Swap Capability Eliminates False Transitions During Power-Up or Hot Insertion
- High ESD Protection
- High-Speed Data Rates up to 20Mbps
- Up to -40°C to +125°C Operating Temperature
- Allows Up to 128 Transceivers on the Bus
Applications/Uses
- Industrial-Control Local Area Networks
- Telecommuncations
- Transceivers for EMI-Sensitive Applications
# Tx/Rx | 1Tx + 1Rx |
Duplex | Full |
VSUPPLY (V) | 3.3 |
Data Rate (kbps) (min) | 250 |
ICC (mA) (typ) | 1.9 |
ESD Protect. (±kV) | 20 |
Tx EN | No |
Rx EN | No |
Oper. Temp. (°C) | -40 to +125 |
Package/Pins | SOIC (N)/8 |
Budgetary Price (See Notes) | $2.18 @1k |
Technical Docs
Data Sheet | +3.3V-Powered, ±20kV ESD-Protected, 20Mbps and Slew-Rate-Limited RS-485/RS-422 Transceivers | Nov 10, 2017 | |
Tutorial | RS-485: Still the Most Robust Communication |
Click any title below to view the detail page where available.

Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
# Tx/Rx | 1Tx + 1Rx |
Duplex | Full |
VSUPPLY (V) | 3.3 |
Data Rate (kbps) (min) | 250 |
ICC (mA) (typ) | 1.9 |
ESD Protect. (±kV) | 20 |
Tx EN | No |
Rx EN | No |
Oper. Temp. (°C) | -40 to +125 |
Package/Pins | SOIC (N)/8 |
Budgetary Price (See Notes) | $2.18 @1k |
Key Features
- Integrated Protection Increases Robustness
- High ESD Protection
- ±20kV HBM ESD per JEDEC JS-001-2012
- ±15kV Air Gap per IEC 61000-4-2
- ±8kV Contact ESD per IEC 61000-4-2
- Short-Circuit Protected Outputs
- True Fail-Safe Receiver Prevents False Transition on Receiver Input Short or Open Events
- Hot-Swap Capability Eliminates False Transitions During Power-Up or Hot Insertion
- High ESD Protection
- High-Speed Data Rates up to 20Mbps
- Up to -40°C to +125°C Operating Temperature
- Allows Up to 128 Transceivers on the Bus
Applications/Uses
- Industrial-Control Local Area Networks
- Telecommuncations
- Transceivers for EMI-Sensitive Applications
Description
Devices in the MAX3483AE family (MAX3483AE/MAX3485AE/MAX3488AE/MAX3490AE/MAX3491AE) are ±20kV ESD-protected RS-485/422 transceivers, optimized for extended cable runs in noisy environments. All devices operate from a single 3.3V supply.
The MAX3483AE and MAX3485AE are half-duplex transceivers. The MAX3488AE, MAX3490AE, and MAX3491AE are full-duplex transceivers. The MAX3483AE/85AE have a 1-unit load receiver input impedance, allowing up to 32 transceivers on the bus. The MAX3488AE/90AE/91AE have a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. Each transceiver includes a fail-safe receiver, ensuring that the receiver output (RO) is high when inputs are shorted, open, or connected to a three-state bus.
The MAX3483AE, MAX3485AE, MAX3488AE, and MAX3490AE are available in industry standard 8-pin SO package, while the MAX3491AE is available in a 14-pin SO package.
Technical Docs
Data Sheet | +3.3V-Powered, ±20kV ESD-Protected, 20Mbps and Slew-Rate-Limited RS-485/RS-422 Transceivers | Nov 10, 2017 | |
Tutorial | RS-485: Still the Most Robust Communication |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal