Users will need to consult the MCP datasheet for information on programming and using this device. The datasheet for this and the MCP can be found. MCP High-speed CAN Transceiver, Industry-standard Pinout, ISO Compatible Features. Supports 1 Mb/s operation Implements ISO The MCP is an interface product that is made by Microchip Technology The MCP data sheet (and other support information) is available from the.

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Implements ISO standard physical layer. Suitable for 12V and 24V systems. Externally-controlled slope for reduced RFI. Detection of ground fault permanent dominant. Power-on reset and voltage brown-out protection. An unpowered node or brown-out event will not.

MCP Datasheet(PDF) – Microchip Technology

Low current standby operation. Protection against datashet due to short-circuit. Protection against high-voltage transients. Automatic thermal shutdown protection. Up to nodes can be connected.

High noise immunity due to differential bus. The R S pin allows three modes of operation to be. These modes are summarized in Table Typically, vatasheet node in a CAN system must have a. When in High-Speed or Slope-Control mode, the driv. It also provides a buffer. Additionally, the slope of the signal transitions on.

The CAN bus has two states: A dominant state occurs when the differential volt. The High-Speed mode is selected by connecting datasneet. A recessive state occurs.

In this mode, the transmitter output driv. The dominant and recessive states. However, a dominant state initiated.

How to Build a CAN Transceiver Circuit with an MCP2551 Chip

Slope-Control mode further reduces EMI by limiting the. The slope is proportional to the current output at the R S. Since the current is primarily determined by the.


Figure illustrates mfp2551 slew rate values as a.

The RXD output pin reflects the differential bus voltage. The low and high states of. Recessive states of the CAN bus, respectively. The receive pin on the controller side. RXD is still functional but will operate at a slower rate. This feature prevents destruction of the. The device is further protected from excessive current. All other parts of the chip. This protection is essential to protect. Current at R s Pin. Resulting Voltage at R S Pin. Device drivers will function, although outputs are not guaranteed to meet the ISO specification.

If the MCP detects an extended low state on the. Positive supply voltage pin. The drivers are disabled if TXD is low for. This implies a maxi. This pin is also tied internally to the receive. This pin is also tied internally to the. The 8-pin pinout is listed in Table The data on this pin. It is usually connected to the transmitter data out. When TXD is low. TXD has an internal pull-up. Differential voltage of the two-wire CAN bus, value. A number of terms are defined in ISO that are. These terms and definitions are.

Transient Voltage on Pins 6 and 7 Note Soldering temperature of leads 10 seconds ESD protection on all other pins Note Short-circuit applied when TXD is high and low.

In accordance with ISO In accordance with IEC Stresses above those listed under “Maximum ratings” may cause permanent damage to the device. Exposure to maximum rating conditions for extended periods. High-level of the power-on reset. Low-level of the power-on reset. Hysteresis of power-on reset. CANH dominant output voltage. CANL dominant output voltage.


V DIFF r o. V DIFF d o. CANL short circuit output current. V DIFF r i. V DIFF d i. V DIFF h i. Deviation between CANH and. This is valid for the receiver in all modes, High-Speed, Slope-Control and standby.

Input voltage for standby mode. R S may be connected to V DD or. GND via a load resistor depending. The wave forms of the applied transients shall be in accordance with “ISO, Part 1”, test pulses 1, 2, 3a and 3b.

Delay TXD to bus active. Delay TXD to bus inactive. Delay TXD to receive active. Delay TXD to receiver. Refer to Figure. Wake-up time from standby.

Rising edge on TXD while. Timing Diagrams and Specifications. V RS Slope resistor. V RXD Receive data. Year code last 2 digits of calendar year. In the event the full Microchip part number cannot be marked on one line, it will. Standard marking consists of Microchip part number, year code, week code, traceability code facility. For marking beyond this, certain price adders apply.

Top to Seating Plane. Base to Seating Plane. Shoulder to Shoulder Width. Tip to Seating Plane. Mold Draft Angle Top.