Overview
The SN65HVD256DR is a Turbo CAN transceiver produced by Texas Instruments, designed to meet the requirements of the ISO 11898-2 high-speed CAN (Controller Area Network) physical layer standard. This device is optimized for data rates exceeding 1 Mbps in both short and long CAN networks, offering enhanced timing margins and robust protection features. It is particularly suited for industrial automation, control systems, and other applications requiring reliable and high-speed communication.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 5.5 | V | |
| VRXD RXD Supply Voltage (SN65HVD256 only) | 2.8 | 5.5 | V | |
| Operating Temperature | -40 | 125 | °C | |
| CAN Bus I/O Voltage (CANH, CANL) | -27 | 40 | V | |
| Logic Input Pin Voltage (TXD, S) | -0.3 | 6 | V | |
| Logic Output Pin Voltage (RXD) | -0.3 | 6 | V | |
| Driver High Level Output Current | -70 | mA | ||
| Driver Low Level Output Current | 70 | mA | ||
| Junction-to-Ambient Thermal Resistance | 107.5 | °C/W |
Key Features
- Meets the ISO 11898-2 high-speed CAN physical layer standard.
- Turbo CAN: Supports data rates in excess of 1 Mbps for both short and long CAN networks.
- Short and symmetrical propagation delay times and fast loop times for enhanced timing margin.
- I/O voltage range supports 3.3-V and 5-V microcontrollers.
- Ideal passive behavior when unpowered: Bus and logic pins are high impedance (no load).
- Protection features include HBM ESD protection exceeding ±12 kV, bus fault protection, undervoltage protection on supply pins, driver dominant time out (TXD DTO), and thermal shutdown protection.
- Characterized for operation from -40°C to 125°C.
- RXD output level shifting through RXD supply input (SN65HVD256).
Applications
- Industrial automation, control, sensors, and drive systems.
- Building, security, and climate control automation.
- Telecom base station status and control.
- CAN bus standards such as CANopen, DeviceNet, NMEA2000, ARINC825, ISO11783, and CANaerospace.
- Functional safety with redundant and multitopology CAN networks (specifically the SN65HVD257 model).
Q & A
- What is the primary function of the SN65HVD256DR?
The SN65HVD256DR is a Turbo CAN transceiver designed to meet the ISO 11898-2 high-speed CAN physical layer standard, enabling reliable and high-speed communication in various applications.
- What are the supported data rates for the SN65HVD256DR?
The device supports data rates exceeding 1 Mbps for both short and long CAN networks.
- What protection features does the SN65HVD256DR offer?
The device includes HBM ESD protection, bus fault protection, undervoltage protection on supply pins, driver dominant time out (TXD DTO), and thermal shutdown protection.
- What is the operating temperature range for the SN65HVD256DR?
The device is characterized for operation from -40°C to 125°C.
- Does the SN65HVD256DR support 3.3-V and 5-V microcontrollers?
Yes, the device supports both 3.3-V and 5-V microcontrollers.
- What is the purpose of the RXD output level shifting feature in the SN65HVD256DR?
The RXD output level shifting feature allows the RXD output to be level-shifted through the RXD supply input, which is particularly useful for interfacing with different voltage levels.
- Can the SN65HVD256DR be used in functional safety applications?
While the SN65HVD256DR itself does not have specific fault indication features, the related SN65HVD257 model includes additional features for functional safety in redundant and multitopology CAN networks.
- What are some common applications for the SN65HVD256DR?
Common applications include industrial automation, building automation, telecom base stations, and various CAN bus standards.
- How does the SN65HVD256DR behave when unpowered?
The device exhibits ideal passive behavior when unpowered, with bus and logic pins being high impedance (no load).
- What is the thermal resistance of the SN65HVD256DR in an SOIC-8 package?
The junction-to-ambient thermal resistance is 107.5°C/W.
