Datasheet > MAX14938

MAX14938

更新时间： 2023-12-20 18:46:18

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
22页	821K
描述
2.75kVRMS隔离、20Mbps半双工PROFIBUS/RS-485收发器，具有±35kV ESD

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中文翻译

获取价格

数据手册

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MAX14938 数据手册

EVALUATION KIT AVAILABLE

MAX14938/MAX14939

2.75kV

Isolated 20Mbps Half-Duplex PROFIBUS/

RMS

RS-485 Transceivers with ±35kV ESD Protection

General Description

The MAX14938/MAX14939 isolated RS-485/PROFIBUS-DP

Beneﬁts and 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

transceivers provide 2750V (60s) of galvanic isolation

RMS

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.

• Allows Up to 128 Devices on the Bus

● Integrated Protections Ensures Robust Communication

• ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs

• 2.75kV

• 630V

Withstand Isolation Voltage for 60s (V

)

RMS

PEAK

ISO

Maximum Repetitive Peak-Isolation

)

An integrated LDO provides a simple and space-efficient

architecture for providing power to the cable side of the

IC.

Voltage (V

IORM

• 445V

Maximum Working-Isolation Voltage

RMS

)

IOWM

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.

• > 30 Years Lifetime at Rated Working Voltage

• Withstands ±10kV Surge per IEC 61000-4-5

• Thermal Shutdown

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.

Safety Regulatory Approvals

● UL According to UL1577

● cUL According to CSA Bulletin 5A

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).

Applications

● Industrial Automation Equipment

● Programmable Logic Controllers

● HVAC

The MAX14938/MAX14939 are available in a wide-body

16-pin SOIC package and operate over the -40°C to

+105°C temperature range.

● Power Meters

Ordering Information appears at end of data sheet.

Functional Diagram

VDDA

VLDO

MAX14938

MAX14939

LDO

VDDB

(PV)

SBA⁺

RXD

TXD

(DEM)

() MAX14938 only

* MAX14939 only

GNDA

GNDB

19-8115; Rev 1; 1/17

12 3 4 5 6 7...22

中文翻译

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与MAX14938相关器件

型号	品牌	获取价格	描述	数据表
MAX14938GWE+	MAXIM	获取价格	2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS
MAX14938GWE+T	MAXIM	获取价格	2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS
MAX14939	MAXIM	获取价格	Operates From a Single 3.3V Supply
MAX14939	ADI	获取价格	2.75kVRMS隔离、20Mbps半双工PROFIBUS/RS-485收发器，具有±35
MAX14939GWE+	MAXIM	获取价格	2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS
MAX14939GWE+T	MAXIM	获取价格	2.75kVRMS Isolated 20Mbps Half-Duplex PROFIBUS
MAX1493CCJ	MAXIM	获取价格	3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
MAX1493CCJ+	MAXIM	获取价格	ADC, Delta-Sigma, 1 Func, 1 Channel, BICMOS, PQFP32, 7 X 7 MM, 1.40 MM HEIGHT, MO-136BC, T
MAX1493CCJ+T	MAXIM	获取价格	ADC, Delta-Sigma, 1 Func, 1 Channel, BICMOS, PQFP32, 7 X 7 MM, 1.40 MM HEIGHT, MO-136BC, T
MAX1493XSEVKIT	MAXIM	获取价格	Guaranteed Up to 5kVRMS Isolation

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