TPIC1021A-Q1 - 汽车类 LIN 物理接口

TPIC1021A-Q1是TI德州仪器公司的一款无产品，TPIC1021A-Q1是汽车类 LIN 物理接口，本站介绍了TPIC1021A-Q1的封装应用图解、特点和优点、功能等，并给出了与TPIC1021A-Q1相关的TI元器件型号供参考。

TPIC1021A-Q1 - 汽车类 LIN 物理接口 - 无 - LIN收发器 - 德州仪器

产品描述

The TPIC1021A is the Local Interconnect Network (LIN) physical interface, which integrates the serial transceiver with wake-up and protection features. The LIN bus is a single-wire bidirectional bus typically used for low-speed in-vehicle networks using data rates between 2.4 kbps and 20 kbps. The LIN protocol output data stream on TXD is converted by the TPIC1021A into the LIN bus signal through a current-limited wave-shaping driver as outlined by the LIN Physical Layer Specification Revision 2.0. The receiver converts the data stream from the LIN bus and outputs the data stream via RXD. The LIN bus has two states: dominant state (voltage near ground) and the recessive state (voltage near battery). In the recessive state, the LIN bus is pulled high by the TPIC1021A’s internal pullup resistor (30 k) and series diode, so no external pullup components are required for slave applications. Master applications require an external pullup resistor (1 k) plus a series diode per the LIN specification.

In sleep mode, the TPIC1021A requires low quiescent current even though the wake-up circuits remain active, allowing for remote wake up via the LIN bus or local wake up via the NWake or EN pins.

The TPIC1021A has been designed for operation in the harsh automotive environment. The device can handle LIN bus voltage swings from 40 V down to ground and survive –40 V. The device also prevents back-feed current through LIN to the supply input, in case of a ground shift or supply voltage disconnection. It also features undervoltage, overtemperature, and loss-of-ground protection. In the event of a fault condition, the output is immediately switched off and remains off until the fault condition is removed.

产品特性

LIN Physical Layer Specification Revision 2.0 Compliant and Conforms to SAEJ2602 Recommended Practice for LIN
LIN Bus Speed up to 20-kbps LIN Specified Maximum
Sleep Mode: Ultralow Current Consumption, Allows Wake-Up Events From LIN Bus, Wake-Up Input (External Switch), or Host MCU
High-Speed Receive Capable
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)
Extended Operation With Supply From 7 V to 27 V DC (LIN Specification 7 V to 18 V)
Interfaces to MCU With 5-V or 3.3-V I/O Pins
Dominant State Timeout Protection
Wake-Up Request on RXD Pin
Control of External Voltage Regulator (INH Pin)
Integrated Pullup Resistor and Series Diode for LIN Slave Applications
Low Electromagnetic Emission (EME), High Electromagnetic Immunity (EMI)
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
Supports ISO9141 (K-Line)-Like Functions

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