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The Goodix GR5405 comprehensive-performance automotive Bluetooth LE 5.3 SoC is developed in accordance with the AEC-Q100 Grade 2 standard, ideal for various automotive applications such as digital car key, tire pressure monitoring, automotive battery pack monitoring, and wireless connection in smart cockpits, supporting Bluetooth Mesh networking protocols. Based on Arm ® Cortex ® -M4F CPU core running at 64 MHz, the GR5405 integrates a 2.4 GHz RF transceiver, Bluetooth LE 5.3 protocol stack, 512 KB on-chip Flash memory, 96 KB system SRAM, and a rich set of peripherals. It provides outstanding RF performance, featuring a maximum TX power of +15 dBm, an RX sensitivity of -99 dBm in Bluetooth LE 1 Mbps mode, achieving a total link budget of up to 114 dB. With two main power supply schemes (DC-DC and SYS_LDO), the GR5405 offers flexible options to achieve a balance between low power consumption and economical BOM.