Ordinary USB data cable
There is no central control chip, and the mobile phone and computer must be plugged in to recognize the line, and the price is cheap. Typical models: Samsung CDMA series, D500 series; Motorola E398 series, V3 series; Nokia DKU-2; NEC N720 series; Siemens 65 series and so on.
USB data cable with IC
With a central control chip, the models of ordinary chips are 2303, 2101, 3116, and you can recognize the line without plugging in a mobile phone or a computer. Since the price of an IC is more than 10 yuan, the price is more expensive than that without an IC. The working principle of the data cable with a chip is USB to COM, which converts the USB interface into a serial port and displays it on the computer.
Typical models: Samsung E638 series, D418 series; NEC N610 series; Siemens 25 series, 55 series; Sony Ericsson mobile phone data cable; Panasonic mobile phone data cable; Lenovo mobile phone data cable and so on.
Special USB data cable
Not ordinary popular chips, dedicated special type chips such as: DKU-5, CA-42, DCU-11 and so on.
USB2.0 and 3.0
USB3.0 is a USB3.0 promotion group composed of industry giants such as Intel, Microsoft, Hewlett-Packard, Texas Instruments, NEC, ST-NXP, etc. It announced on November 18, 2008 that it had officially completed and publicly released the USB3.0 standard.
The USB3.0 standard provides ten times the transmission speed of USB 2.0 and higher energy-saving efficiency, and can be widely used in PC peripherals and consumer electronics products.
The theoretical bandwidth of the USB3.0 interface is increased to 5Gbps, while the theoretical bandwidth of USB2.0 is 480Mbps. All high-speed USB2.0 devices will perform better when they are connected to USB3.0.
USB2.0 data cable
The main difference:
1. The data bandwidth of USB3.0 is ten times that of USB2.0, which can reach 5Gb/s (480MB/s), and the synchronous transmission bandwidth can also reach 384MB/s, which is one of the main differences between USB3.0 and 2.0;
2. Low power consumption (about 25% lower power consumption than USB2.0 at 20MB/s data transmission);
3. USB3.0 is more energy-efficient than USB 2.0, and you can use power-saving mode for devices that are temporarily in a waiting state;
4. USB3.0 can provide more power through the cable (2.5W increased to 4.5W);
5. USB3.0 is backward compatible and supports USB2.0 devices, but USB2.0 cannot support USB3.0.
USB3.0 data cable
The increasing power of USB cables means that people can use them to charge laptops.
Intel and its allies are developing USB Power Delivery (USB PD) technology. USB 2.0 can transmit 2.5 watts of power, USB 3.0 is 4.5 watts, USB BC cables can transmit 7.5 watts of power, and USB PD can support 10 watts of mobile devices, 18 watts of tablet devices and most peripherals, 36 watt thin client devices, larger peripherals, 60 watt notebooks, docking stations and 100 watt workstations.