Gasgoo Awards 2022 applicant: 5Mbps CAN FD transceiver chip SIT1043 from Silicon Internet of Things

For the Gasgoo Awards 2022, integrated low power management and fault diagnosis 5Mbps CAN FD transceiver chip SIT1043 from Hunan Silicon Internet of Things Technology Co.,Ltd. has applied for the Top 100 Players of China's New Automotive Supply Chain.

Photo credit: Silicon Internet of Things

Product: integrated low power management and fault diagnosis 5Mbps CAN FD transceiver chip SIT1043

Description

SIT1043 is an interface chip used between the CAN protocol controller and the physical bus. It can be used in trucks, buses, cars, industrial control, and other fields. It supports a 5Mbps flexible data rate (Flexible Data-Rate). Its ability of differential signal transmission between CAN protocol controllers is fully compatible with the "ISO 11898-2: 2016" standard.

Photo credit: Silicon Internet of Things

Features

● Reliable communication at high data rates with loop delay

● Suitable for 12 V and 24 V systems

● Low ElectroMagnetic Emission (EME) and high ElectroMagnetic Immunity (EMI)   

● Listen-only mode

● Very low current Standby and Sleep modes

● Local and remote wake-up

● Bus ±70V withstand voltage

● ±30V receiver common mode input voltage

● IO port supports 3.3V/5V MCU

● Driver (TXD) dominant timeout function

● Undervoltage protection on VBAT, VCC and VIO supply pins

● High Speed CAN, Support 5Mbps CAN With Flexible Data Rate

● Sleep mode INH output pin with power disable function

Unique advantages

The SIT1043 can detect four kinds of local error events: TXD dominant timeout, TXD and RXD short circuit, bus dominant timeout, and over-temperature protection. Whenever any of these events occur, a local error flag is generated, and when the device transitions from normal operating mode to silent mode, ERRN is pulled low, indicating that a local error flag has occurred.

The INH pin is pulled high in normal working mode, silent mode, standby mode, and sleep-wait mode; in sleep mode, the pin is in a high-impedance state.

Over-temperature protection

SIT1043 has an over-temperature protection function. After the over-temperature protection is triggered, the driver tube will be turned off. Because the driver tube is the main energy-consuming component, turning off the driver tube can reduce power consumption and thus reduce the chip temperature. At the same time, other parts of the chip still keep working normally.

Undervoltage protection

SIT1043 has an under-voltage detection function on the power supply pin. When VCC is lower than VuvdVCC and the under-voltage time is greater than tUVD_VCC or VIO is lower than Vuvd_VIO and the under-voltage time is greater than tUVD_VIO, the device will enter sleep mode, which can save power consumption and avoid bus undisturbed, in sleep mode, the INH pin will be pulled high. Standby mode is entered when VBAT is below Vuvd_VBAT and the transceiver will be disconnected from the bus (zero load). When the voltage at pin VBAT is restored, the transceiver will switch to the operating mode indicated by the logic levels on the STBN and EN pins.

Control Mode

Through the control pins EN and STBN, the SIT1043 can be selected to enter different working modes: normal working mode; listen-only mode; standby mode; enter sleep mode; sleep mode.

Dominant timeout function

In high-speed mode, if a low level on pin TXD lasts longer than the internal timer value (tdom_BUS), the transmitter will be disabled, driving the bus into a recessive state. This prevents the bus line from being driven to a permanent dominant state (blocking all network traffic) due to a hardware or software application fault on pin TXD being forced permanently low. A rising edge signal on pin TXD can be reset.

Wake up function

SIT1043 has local wake-up and remote wake-up functions.

Application

Vehicle, BMS, BCM, OBD, AVAS, ADAS, TBOX, OBC

Prospects

It will be widely used in various ECU modules of new energy, which plays a very important role in saving power consumption and increasing the endurance of new energy vehicles