MAX14940GWE+ by Analog Devices

2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS/RS-485 Transceiver with ±35kV ESD Protection and Integrated Transformer Driver

Status: Active
Series: MAX14940
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX14940 isolated RS-485/PROFIBUS-DP transceiver provides 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 reduced noise when there are large differences in ground potential between ports. This device allows for robust communication up to 20Mbps. The MAX14940 includes an integrated 450kHz transformer driver for power transfer to the cable-side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient way of designing an isolated DC/DC supply. The MAX14940 includes one half-duplex driver/receiver channel that is fully compliant with both RS-485 and PROFIBUS-DP standards. 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 MAX14940 is available in a wide body 16-pin SOIC package and operates over the -40°C to +105°C temperature range.

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Prices starting from US$6.16

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Features

High Integration Simplifies Designs Integrated LDO for Cable-Side Power Can Also Power External Loads Up to 10mA Integrated Transformer Driver for Power Transfer to Cable-Side Has Up to 80% Efficiency at 150mA Load
Integrated LDO for Cable-Side Power Can Also Power External Loads Up to 10mA
Integrated Transformer Driver for Power Transfer to Cable-Side Has Up to 80% Efficiency at 150mA Load
High-Performance Transceiver Enables Flexible Designs Compliant with RS-485 EIA/TIA-485 and EIA 61158-2 Type 3 PROFIBUS-DP Standards 20Mbps (max) Data Rate Up to 128 Devices on the Bus
Compliant with RS-485 EIA/TIA-485 and EIA 61158-2 Type 3 PROFIBUS-DP Standards
20Mbps (max) Data Rate
Up to 128 Devices on the Bus
Integrated Protection for Robust Communication ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs 2.75kVRMS Withstand Isolation Voltage for 60 Seconds (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 60 Seconds (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) 3.0 to 5.5
Data Rate (kbps) (min) 20000
Galvanic Isolation (±V) 2750
ICC (mA) (typ) 4.7
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) 5.15

MAX14940GWE+ Semiconductors - ICs by Analog Devices

PROFIBUS/RS485 TX RX 20MBPS WSOIC-16

Electronic & Electrical Components>Semiconductors - ICs>Driver & Interface ICs
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX14940 isolated RS-485/PROFIBUS-DP transceiver provides 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 reduced noise when there are large differences in ground potential between ports. This device allows for robust communication up to 20Mbps. The MAX14940 includes an integrated 450kHz transformer driver for power transfer to the cable-side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient way of designing an isolated DC/DC supply. The MAX14940 includes one half-duplex driver/receiver channel that is fully compliant with both RS-485 and PROFIBUS-DP standards. 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 MAX14940 is available in a wide body 16-pin SOIC package and operates 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 3V
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 MAX14940
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

2.75KV Isolated 20Mbps Half-Du | Analog Devices
Transceiver, Rs422/Rs485, Wsoic-16 | Newark Electronics
PROFIBUS/RS485 TX RX, 20MBPS, WSOIC-16 | element14

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Is the MAX14940GWE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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