MCP2562FD-E/MF

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1. Describe

The MCP2562FD-E/MF is Microchip Technology Inc.'s second-generation high-speed CAN transceiver. It provides the same functionality as the MCP2561/2. Additionally, it guarantees loop delay symmetry to support the higher data rates required by CAN FD. Improved maximum propagation delay to support longer bus lengths. The device meets automotive requirements for CAN FD bit rates over 2 Mbps, low quiescent current, electromagnetic compatibility (EMC), and electrostatic discharge (ESD).

2. Feature

    1. Optimized for CAN FD (Flexible Data Rate) 2, 5 and 8 Mbps operation

        - Maximum propagation delay: 120 ns

        - Loop delay symmetry: -10%/+10% (2 Mbps)

    2. Implement ISO-11898-2 and ISO-11898-5 Standard Physical Layer Requirements

    3. Very low standby current (5 µA, typical)

    4. VIO power pins are connected directly to CAN Controllers and Microcontrollers 1.8V to 5.5V Input/Output

    5. SPLIT output pin stabilizes common mode Biased split termination scheme

    6. CAN bus pins are disconnected when the device is in the disconnected state No power

        - An unpowered node or a power-down event will CAN bus is not loaded

    7. Ground fault detection:

        - Permanent dominant detection on TXD

        - Permanent dominant detection on the bus

    8. Power-on reset and brownout Protection of VDD pin

    9. Protection against damage due to short circuits condition (positive or negative battery voltage)

  10. Protection against high voltage transients car environment

  11. Automatic thermal shutdown protection

  12. Suitable for 12V and 24V systems

  13. Meet or exceed stringent vehicle design requirements, including "Hardware Requirements For LIN, CAN and FlexRay interfaces Automotive Applications", Version 1.3, May 2012

        - Radiated Emission @ 2 Mbps vs normal Mode Chokes (CMC)

        - DPI @ 2 Mbps with CMC

  14. High ESD protection on CANH and CANL, Complies with IEC61000-4-2 up to ±14 kV

  15. Available in PDIP-8L, SOIC-8L and 3x3 DFN-8L

  16. temperature range:

        - Extended (E): -40°C to +125°C

        - High (H): -40°C to +150°C

3. Pin configuration

4. Pin Description

5. Device overview

The MCP2562FD-E/MF is a high-speed CAN device, fault-tolerant device that acts as an interface between the CAN protocol controller and the physical bus. The MCP2561/2FD devices provide differential transmit and receive functions for CAN protocol controllers and are fully compliant with ISO-11898-2 and ISO-11898-5 standards. Loop Delay Symmetry is guaranteed to support CAN FD (Flexible Data Rate) data rates up to 5 Mbps. Improved maximum propagation delay to support longer bus lengths. Typically, each node in a CAN system must have a device to convert the digital signal generated by the CAN controller into a signal suitable for transmission over the bus cable (differential output). It also provides buffering between high voltage spikes generated on the CAN bus by the CAN controller and external sources.

6. Standby mode

The device can be put into standby mode by applying a high voltage to the STBY pin. In standby mode, the high-speed parts of the transmitter and receiver are turned off to minimize power consumption consume. Enables the low-power receiver and wake-up filter block to monitor bus activity. Due to wakeup, the receive pin (RXD) will show a delayed representation of the CAN bus filter. The CAN controller is interrupted by a falling edge on the RXD pin (dominant state on the CAN bus). The CAN controller must put the MCP2561/2FD back into normal mode using the STBY pin to enable high speed data communication. The CAN bus wake-up function requires the supply voltages VDD and VIO to be within valid ranges.

7. Transmitter function

CAN bus has two states: Dominant State, Recessive State A dominant state occurs when the differential voltage between CANH and CANL is greater than VDIFF(D)(I). A recessive state occurs when the differential voltage is less than VDIFF(R)(I). Dominant and recessive states correspond to low and high states of TXD input pins, respectively. However, the dominant state initiated by another CAN node will override the recessive state on the CAN bus.

8. Internal protection

CANH and CANL are protected against short-to-battery and electrical transients that can occur on the CAN bus. This feature prevents damage to the transmitter output stage under such fault conditions. Thermal shutdown circuitry disables the output driver when the junction temperature exceeds the nominal limit of +175°C, further protecting the device from excessive current loads. All other parts of the chip keep running and the chip temperature is Reduced due to reduced power dissipation in the transmitter output. This protection is essential to prevent damage from bus shorts.