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MAX314

10 OHM, Quad, SPST, CMOS Analog Switches

MAX314

10廓, Quad, SPST, CMOS Analog Switches

MAX3140

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

GeneralDescription TheMAX3140isacompleteuniversalasynchronousreceiver-transmitter(UART)andatruefail-safeRS-485/RS-422transceivercombinedinasingle28-pinQSOPpackageforspace-,cost-,andpower-constrainedapplications.TheMAX3140savesadditionalboardspaceaswellasmic

MAX3140

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

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.\nThe 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.\nThe 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.\nThe 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).

MAX3140CEI

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

GeneralDescription TheMAX3140isacompleteuniversalasynchronousreceiver-transmitter(UART)andatruefail-safeRS-485/RS-422transceivercombinedinasingle28-pinQSOPpackageforspace-,cost-,andpower-constrainedapplications.TheMAX3140savesadditionalboardspaceaswellasmic

MAX3140EEI

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

GeneralDescription TheMAX3140isacompleteuniversalasynchronousreceiver-transmitter(UART)andatruefail-safeRS-485/RS-422transceivercombinedinasingle28-pinQSOPpackageforspace-,cost-,andpower-constrainedapplications.TheMAX3140savesadditionalboardspaceaswellasmic

MAX314C/D

10?? Quad, SPST, CMOS Analog Switches

GeneralDescription Maxim’sMAX312/MAX313/MAX314analogswitchesfeaturelowon-resistance(10?max)and1.5?on-resistancematchingbetweenchannels.Theseswitchesconductequallywellineitherdirection.Theyofferlowleakageovertemperature(2.5nAat+85°C).LowpowerconsumptionandESD

MAX314CPE

10?? Quad, SPST, CMOS Analog Switches

GeneralDescription Maxim’sMAX312/MAX313/MAX314analogswitchesfeaturelowon-resistance(10?max)and1.5?on-resistancematchingbetweenchannels.Theseswitchesconductequallywellineitherdirection.Theyofferlowleakageovertemperature(2.5nAat+85°C).LowpowerconsumptionandESD

MAX314CSE

10?? Quad, SPST, CMOS Analog Switches

GeneralDescription Maxim’sMAX312/MAX313/MAX314analogswitchesfeaturelowon-resistance(10?max)and1.5?on-resistancematchingbetweenchannels.Theseswitchesconductequallywellineitherdirection.Theyofferlowleakageovertemperature(2.5nAat+85°C).LowpowerconsumptionandESD

MAX314CSLASHD

10?? Quad, SPST, CMOS Analog Switches

GeneralDescription Maxim’sMAX312/MAX313/MAX314analogswitchesfeaturelowon-resistance(10?max)and1.5?on-resistancematchingbetweenchannels.Theseswitchesconductequallywellineitherdirection.Theyofferlowleakageovertemperature(2.5nAat+85°C).LowpowerconsumptionandESD