A module that can replace the can chip

Abstract

The invention discloses a module that can replace the CAN chip. The module is provided with a first pin (CANTX), a second pin (GND), a third pin (VCC3V3), a fourth pin ( CANRX), the fifth pin, the sixth pin (CANL), the seventh pin (CANH), the eighth pin, the first switch (U1), the second switch (U2) and the transistor (Q1). A module that can replace the CAN chip described in the present invention is provided with a No. 1 switch (U1), a No. 2 switch (U2) and a triode (Q1), which can reduce the dependence on foreign chips, break monopoly, and reduce The cost of CAN equipment, module size and pin definition are fully compatible with the original chip CAN chip, which can be directly replaced without changing the circuit board, and all the materials used in this module are general-purpose materials produced in China. The short procurement cycle brings better prospects for use.

Description

technical field [0001] The invention relates to the field of CAN chip technology, in particular to a module that can replace the CAN chip. Background technique [0002] CAN bus is the most commonly used bus protocol in automobiles, and CAN bus occupies more than 80% of the market in all automobile buses. All devices conforming to the CAN bus must use a CAN transceiver. At present, the CAN bus transceivers on the market only have dedicated chips (hereinafter referred to as: CAN chips), and the main technology is in the hands of a few large foreign companies, such as TJA1050 and TJA1050 produced by NXP, and MC33901 produced by Freescale. , MC34901, TI's SN65HVD251 and so on. All domestic CAN bus devices need to use the CAN chips produced by these large foreign companies mentioned above. Since the chips are concentrated in the hands of large foreign companies, the use of these chips will bring the following problems: 1. The unit price of the chip is high; 2. Due to All domes...

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Problems solved by technology

All domestic CAN bus devices need to use the CAN chips produced by these large foreign companies mentioned above. Since the chips are concentrated in the hands of large foreign companies, the use of these chips will bring the following problems: 1. The unit price of the chip is high; 2. Due to All domestic purchases need to be imported, and the procurement cycle is long

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