1. The wiring between RS-232 and TTL mainly involves voltage conversion, as RS-232 uses negative logic levels (+3V to +15V represents logic low, -3V to -15V represents logic high), while TTL uses positive logic levels (0V represents logic low, 3.3V or5V represents logic high).When no data is transmitted on the serial data line, it is … Read more
1. Basic Structure of I/O Units The I/O PAD is a critical part of the chip that connects to external circuits, typically consisting of bonding pads, circuits, power lines, and ground lines. The bonding pad (PAD) is used to connect the chip to the package substrate via gold wires, usually shaped as rectangles measuring several … Read more
In electronic circuits, Power Management Integrated Circuits (PMICs) are crucial core components responsible for voltage conversion, battery charging and discharging, overload protection, and other essential functions. However, with hundreds of PMIC models available, how can engineers differentiate between them? 1. Silkscreen Decoding ① Brand Logo Identification TI (Texas Instruments) TPS/LM series, ADI (Analog Devices) LT/ADP … Read more