CAN · LIN · Industrial interfaces

SIT Communication Interface ICs

SIT connects controllers to vehicle and industrial communication buses. CAN, CAN FD, CAN SIC and LIN transceivers provide the bus-side electrical interface; CAN and LIN system basis chips also integrate node-supply functions. RS-485, RS-422 and RS-232 devices serve equipment serial links, with LDOs and protection devices supporting the surrounding circuit.

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Products and applications

Interface circuits for vehicle nodes and industrial links

Interface and supporting products

Controller-to-bus connection

CAN, CAN FD and CAN SIC transceivers

SIT CAN transceivers connect the controller to the differential bus. CAN FD parts support the faster data phase of CAN FD networks; CAN SIC devices such as SIT1463Q add signal-improvement functions to suppress ringing in more complex wiring. Supply, logic-side voltage and low-power modes remain device-specific.

CAN CAN FD CAN SIC

Local interconnect nodes

LIN transceivers

SIT LIN transceivers connect controllers to a single-wire vehicle bus. The range includes single-, dual- and four-channel devices; SIT1021Q also provides an INH output for node power control. Channel count, local or remote wake-up and sleep behavior determine how the interface fits the node and its standby-power design.

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Communication and node supply

CAN and LIN system basis chips

SIT CAN and LIN system basis chips combine the bus interface with regulated supply functions for a control node. This can replace separate communication and supply devices in the node design. The number of regulator outputs, available output current and wake-up behavior distinguish the SBC options.

CAN SBC LIN SBC

Differential serial links

RS-485 and RS-422 interfaces

SIT RS-485 and RS-422 devices provide differential transmit and receive channels for industrial serial links. Half- or full-duplex arrangements change the wiring and channel needs; data rate, bus loading and common-mode range set the electrical limits. Termination and protection complete the link at board level.

RS-485 RS-422

Equipment serial ports

RS-232 drivers and receivers

SIT RS-232 drivers and receivers translate between a controller and the electrical levels of an equipment serial port. Driver and receiver channel counts determine which data and control signals the port can carry. Supply voltage, external components and package pinout matter when fitting the interface to an existing board.

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Support around the interface

Power and protection devices

SIT also lists LDO regulators, MOSFETs and ESD/TVS protection devices. These perform different jobs: regulating a rail, switching a load or limiting a transient. For a protected bus node, coordinate the regulator limits, transistor drive conditions and protection clamp behavior with the transceiver and the complete board-level circuit.

LDO MOSFETs ESD protection TVS

Vehicle and industrial applications

Wake-up and power states

Vehicle control networks

CAN and LIN nodes need both bus communication and a way to wake the controller without keeping the whole node powered. SIT transceivers and SBCs offer different sleep, wake-up and supply-control arrangements. The chosen automotive part must also meet the vehicle program's operating range, qualification and fault-response requirements.

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Connections between controllers

Industrial and energy-storage links

An energy-storage cabinet can use CAN between its battery-management controller and other control units, and RS-485 for metering or monitoring links. SIT transceivers provide the electrical connection; the controller runs the application protocol. Ground-potential differences and external cabling determine whether the link also needs isolated data and power paths.

Industrial Energy storage and BMS

SIT part numbers

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Part number	Brand	Product type	Package	Quantity	Date code	RFQ
Part numberSIT1057QTK/3	BrandSIT	Product typeCAN FD Transceiver	Package8-terminal DFN; 3.0 x 3.0 mm typical; pitch 0.65 mm; height 0.75 mm typical, 0.8 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT3490EESA	BrandSIT	Product typeRS-485 / RS-422 Transceiver	Package8-pin SOP; body 4.9 x 3.9 mm typical; lead span 6.0 mm typical; pitch 1.27 mm; height 1.8 mm maximum	Quantity—	Date code22+	RFQRequest quote
Part numberSIT1021QT	BrandSIT	Product typeLIN Transceiver	Package8-pin SOP; body 4.9 x 3.9 mm typical; lead span 6.0 mm typical; pitch 1.27 mm; height 1.8 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT1043QT	BrandSIT	Product typeCAN FD Transceiver	Package14-pin SOP; body 8.65 x 3.9 mm nominal; lead span 6.0 mm nominal; pitch 1.27 mm; height 1.75 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT1042AQTK/3	BrandSIT	Product typeCAN FD Transceiver	Package8-terminal DFN; 3.0 x 3.0 mm typical; pitch 0.65 mm; height 0.75 mm typical, 0.8 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT1145AQT/FD	BrandSIT	Product typeCAN FD Transceiver	Package14-pin SOP; body 8.65 x 3.9 mm nominal; lead span 6.0 mm nominal; pitch 1.27 mm; height 1.75 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT1044QT/3	BrandSIT	Product typeCAN FD Transceiver	Package8-pin SOP; body 4.9 x 3.9 mm typical; lead span 6.0 mm typical; pitch 1.27 mm; height 1.8 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT1043QTK	BrandSIT	Product typeCAN FD Transceiver	Package14-terminal DFN; 4.5 x 3.0 mm nominal; pitch 0.65 mm; height 0.85 mm nominal, 0.9 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote
Part numberSIT1042AQT/3	BrandSIT	Product typeCAN FD Transceiver	Package8-pin SOP; body 4.9 x 3.9 mm typical; lead span 6.0 mm typical; pitch 1.27 mm; height 1.8 mm maximum	Quantity—	Date codeConfirm by RFQ	RFQRequest quote

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