MAX14938GWE+ by Analog Devices

2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS/RS-485 Transceivers with ±35kV ESD Protection


The MAX14938/MAX14939 isolated RS-485/PROFIBUS-DP transceivers provide 2750VRMS (60s) of galvanic isolation between the cable side (RS-485 driver/receiver side) and the UART side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. These devices allow for robust communication up to 20Mbps. An integrated LDO provides a simple and space-efficient architecture for providing power to the cable side of the IC. Each device includes one half-duplex driver/receiver channel. The receiver is 1/4-unit load, allowing up to 128 transceivers on a common bus. Integrated true fail-safe circuitry ensures a logic-high on the receiver output when inputs are shorted or open. Undervoltage lockout disables the driver when cable-side or UART-side power supplies are below functional levels. The driver outputs/receiver inputs are protected from ±35kV electrostatic discharge (ESD) to GNDB on the cable side, as specified by the Human Body Model (HBM). The MAX14938/MAX14939 are available in a wide-body 16-pin SOIC package and operate over the -40°C to +105°C temperature range.

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Prices starting from US$5.37

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Farnell
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Analog Devices
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Newark Electronics
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Features

High-Performance Transceiver Enables Flexible Designs Integrated LDO for Cable-Side Power Compliant with RS-485 EIA/TIa-485 Standard 20Mbps Maximum Data Rate Allows Up to 128 Devices on the Bus
Integrated LDO for Cable-Side Power
Compliant with RS-485 EIA/TIa-485 Standard
20Mbps Maximum Data Rate
Allows Up to 128 Devices on the Bus
Integrated Protections Ensures Robust Communication ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs 2.75kVRMS Withstand Isolation Voltage for 60s (VISO) 630VPEAK Maximum Repetitive Peak-Isolation Voltage (VIORM) 445VRMS Maximum Working-Isolation Voltage (VIOWM) > 30 Years Lifetime at Rated Working Voltage Withstands ±10kV Surge per IEC 61000-4-5 Thermal Shutdown
±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
2.75kVRMS Withstand Isolation Voltage for 60s (VISO)
630VPEAK Maximum Repetitive Peak-Isolation Voltage (VIORM)
445VRMS Maximum Working-Isolation Voltage (VIOWM)
> 30 Years Lifetime at Rated Working Voltage
Withstands ±10kV Surge per IEC 61000-4-5
Thermal Shutdown

Specifications

# Tx/Rx 1Tx + 1Rx
Duplex Half
VSUPPLY (V) 5
Data Rate (kbps) (min) 20000
Galvanic Isolation (±V) 2750
ICC (mA) (typ) 4
ESD Protect. (±kV) 35
Tx EN Yes
Rx EN Yes
Oper. Temp. (°C) -40 to +105
Package/Pins SOIC (W) HYBRID/16
BudgetaryPrice (See Notes) 4.47


MAX14938GWE+ Semiconductors - ICs by Analog Devices

RS-485 TXRX 20MBPS 5.5V WSOIC-16

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The MAX14938/MAX14939 isolated RS-485/PROFIBUS-DP transceivers provide 2750VRMS (60s) of galvanic isolation between the cable side (RS-485 driver/receiver side) and the UART side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. These devices allow for robust communication up to 20Mbps. An integrated LDO provides a simple and space-efficient architecture for providing power to the cable side of the IC. Each device includes one half-duplex driver/receiver channel. The receiver is 1/4-unit load, allowing up to 128 transceivers on a common bus. Integrated true fail-safe circuitry ensures a logic-high on the receiver output when inputs are shorted or open. Undervoltage lockout disables the driver when cable-side or UART-side power supplies are below functional levels. The driver outputs/receiver inputs are protected from ±35kV electrostatic discharge (ESD) to GNDB on the cable side, as specified by the Human Body Model (HBM). The MAX14938/MAX14939 are available in a wide-body 16-pin SOIC package and operate over the -40°C to +105°C temperature range.

Specifications

Device Type Transceiver
IC Interface Type RS485
No. of Drivers 1Drivers
No. of Receivers 1Receivers
Supply Voltage Min 1.71V
Supply Voltage Max 5.5V
Driver Case Style WSOIC
No. of Pins 16Pins
Operating Temperature Min -40°C
Operating Temperature Max 105°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
IC Generic Number MAX14938
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

2.75KV Isolated 20Mbps Half-Du | Analog Devices
Transceiver, Rs422/Rs485, Wsoic-16 | Newark Electronics
RS-485 TXRX, 20MBPS, 5.5V, WSOIC-16 | element14

Frequently Asked Questions

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Is the MAX14938GWE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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