MAX3140EEI+ by Analog Devices

SPI/MICROWIRE-Compatible UART with Integrated True Fail Safe RS-485/RS-422 Transceivers

Status: Active
Series: MAX3140
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX3140 is a complete universal asynchronous receiver-transmitter (UART) and a true fail-safe RS-485/RS-422 transceiver combined in a single 28-pin QSOP package for space-, cost-, and power-constrained applications. The MAX3140 saves additional board space as well as microcontroller (µC) I/O pins by featuring an SPI™/QSPI™/MICROWIRE™-compatible serial interface. It is pin-programmable for configuration in all RS-485/RS-422 networks. The MAX3140 includes a single RS-485/RS-422 driver and receiver featuring true fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This feature provides immunity to faults without requiring complex termination. The MAX3140 provides software-selectable control of half- or full-duplex operation, data rate, slew rate, and transmitter and receiver phase. The RS-485 driver slew rate is programmable to minimize EMI and results in maximum data rates of 115kbps, 500kbps, and 10Mbps. Independent transmitter/receiver phase control enables software correction of twisted-pair polarity reversal. A 1/8-unit-load receiver input impedance allows up to 256 transceivers on the bus. The MAX3140's UART includes an oscillator circuit derived from an external crystal, and a baud-rate generator with software-programmable divider ratios for all common baud rates from 300 baud to 230k baud. The UART features an 8-word-deep receive FIFO that minimizes processor overhead and provides a flexible interrupt with four maskable sources, including address recognition on 9-bit networks. Two control lines are included for hardware handshaking-one input and one output. The MAX3140 operates from a single +5V supply and typically consumes only 645µA with the receiver active. Hardware-invoked shutdown reduces supply current to only 20µA. The UART and RS-485/RS-422 functions can be used together or independently since the two functions share only supply and ground connections (the MAX3140 is hardware- and software-compatible with the MAX3100 and MAX3089).

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Prices starting from US$19.59

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Features

Integrated UART and RS-485/RS-422 Transceiver in a Single 28-Pin QSOP
SPI/MICROWIRE-Compatible Interface Saves µC I/O Pins
True Fail-Safe Receiver Output Eliminates Complex Network Termination
Pin-Programmable RS-485/RS-422 Features Half/Full-Duplex Operation Slew-Rate Limiting for Reduced EMI 115kbps/500kbps/10Mbps Data Rates Receiver/Transmitter Phase for Twisted-Pair Polarity Reversal
Half/Full-Duplex Operation
Slew-Rate Limiting for Reduced EMI
115kbps/500kbps/10Mbps Data Rates
Receiver/Transmitter Phase for Twisted-Pair Polarity Reversal
Full-Featured UART Programmable Up to 230k baud with a 3.6864MHz Crystal 8-Word Receive FIFO Minimizes Processor Overhead 9-Bit Address-Recognition Interrupt
Programmable Up to 230k baud with a 3.6864MHz Crystal
8-Word Receive FIFO Minimizes Processor Overhead
9-Bit Address-Recognition Interrupt
Allows Up to 256 Transceivers on the Bus
Low 20µA Hardware Shutdown Mode
Hardware/Software-Compatible with MAX3100 and MAX3089

Specifications

µP I/F SPI and Microwire Compatible
# Channels 1
ICC (mA) (typ) 0.7
VSUPPLY (V) 5
Package/Pins QSOP HYBRID/28
Oper. Temp. (°C) -40 to +850 to +70
BudgetaryPrice (See Notes) 6.7

Last 6 months Inventory & Pricing History

MAX3140EEI+ Semiconductors - ICs by Analog Devices

UART INTERFACE 10MBPS 5.25V QSOP-28

Semiconductors - ICs
> Drivers & Interfaces
> UART Interfaces
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

No. of Channels 1 Channel, 1Channels
Data Rate 10Mbps
Supply Voltage Min 4.75V
Supply Voltage Max 5.25V
Interface Case Style QSOP
No. of Pins 28Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Last 6 months Inventory & Pricing History

Alternative Descriptions

UART INTERFACE, 10MBPS, 5.25V, QSOP-28 | element14
Uart Interface, 10Mbps, 5.25V, Qsop-28 | Newark Electronics

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This part has not been flagged as RoHS Compliant.

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