Overview
The TPIC1021DRG4, produced by Texas Instruments, is a Local Interconnect Network (LIN) physical layer transceiver designed for automotive and industrial applications. This device integrates a serial transceiver with wake-up and protection features, making it suitable for low-speed in-vehicle networks and other distributed control systems. The TPIC1021 complies with the LIN physical layer specification revision 2.1 and SAEJ2602 recommended practice for LIN, supporting data rates from 2.4 kbps to 20 kbps.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VSUP) | 7 | 14 | 27 | V |
| Transient Supply Voltage | 0 | - | 40 | V |
| Operational Temperature Range | -40 | - | 125 | °C |
| Junction Temperature | -40 | - | 150 | °C |
| Thermal Shutdown | - | - | 200 | °C |
| Current Consumption (Normal Mode, Bus Dominant) | 1.2 | 2.5 | - | mA |
| Current Consumption (Low Power Mode) | 20 | 50 | - | µA |
| LIN Bus Speed | - | - | 20 | kbps |
| ESD Protection (LIN Pin) | - | - | 12 | kV (HBM) |
Key Features
- LIN physical layer specification revision 2.1 compliant and SAEJ2602 recommended practice for LIN
- LIN bus speed up to 20 kbps
- ESD protection to 12 kV (human body model) on LIN pin
- LIN pin handles voltage from –40 V to 40 V
- Survives transient damage in automotive environment (ISO 7637)
- Operation with supply from 7-V to 27-V DC
- Two operation modes: normal and low-power (sleep) mode
- Low current consumption in low power mode
- Wake-up available from LIN bus, wake-up input (external switch), or host MCU
- Interfaces to MCU with 5-V or 3.3-V I/O pins
- Dominant state timeout protection on TXD pin
- Wake-up request on RXD pin
- Control of external voltage regulator (INH Pin)
- Integrated pull-up resistor and series diode for LIN responder applications
- Low EME (electromagnetic emissions), high EMI (electromagnetic immunity)
- Bus terminal short-circuit protected for short to battery or short to ground
- Thermally protected
- Ground disconnection fail-safe at system level
- Ground shift operation at system level
- Unpowered node does not disturb the network
Applications
- Industrial sensing
- White goods distributed control
- Automotive in-vehicle networks
- Low-speed distributed control systems
Q & A
- What is the TPIC1021DRG4 compliant with?
The TPIC1021DRG4 is compliant with the LIN physical layer specification revision 2.1 and SAEJ2602 recommended practice for LIN.
- What are the supported data rates for the TPIC1021DRG4?
The device supports data rates from 2.4 kbps to 20 kbps.
- What is the operating voltage range of the TPIC1021DRG4?
The device operates with a supply voltage from 7 V to 27 V DC.
- How does the TPIC1021DRG4 handle ESD protection?
The LIN pin has ESD protection up to 12 kV (human body model).
- What are the wake-up options for the TPIC1021DRG4?
The device can wake up from the LIN bus, an external switch (NWake pin), or the host MCU.
- How does the TPIC1021DRG4 protect against dominant state timeout?
The device has a dominant state timeout protection on the TXD pin to prevent the LIN bus from being permanently driven low.
- What is the current consumption in low power mode?
The current consumption in low power mode is typically between 20 µA and 50 µA.
- Is the TPIC1021DRG4 thermally protected?
Yes, the device is thermally protected with a thermal shutdown at 200°C and a hysteresis of 25°C.
- What kind of electromagnetic protection does the TPIC1021DRG4 offer?
The device offers low electromagnetic emissions (EME) and high electromagnetic immunity (EMI).
- How does the TPIC1021DRG4 handle ground disconnection?
The device has ground disconnection fail-safe at the system level and can operate with ground shift.
