Waterproof TYPE C Development and Transmission Speed-JINBEILI ELECTRICAL

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Waterproof TYPE C Development and Transmission Speed

Jan 03,2023

As electronic products become increasingly thinner and lighter, the data interfaces we use are also becoming "thinner and lighter." Many older interfaces have been phased out because they are too thick for modern electronic products. Most interfaces we see now are smaller versions. For example, HDMI has mini-HDMI and micro-HDMI, and USB has mini-USB and waterproof Type-C.

In terms of interface shape, although every explanation of waterproof Type-C involves a long list of details, the commonly used USB interfaces are mainly divided into three types: USB-A, USB-B, and USB-C.

Type-A: This is the common standard USB interface. The mainstream types are USB 2.0 speed (tens of MB/s) and USB 3.0 speed (hundreds of MB/s). There are also a small number of USB 3.0 Type-A interfaces with 110Gbps speed, commonly found on newer desktop computer motherboards.

Type-B: Commonly found on printers and monitors with touch and USB interfaces, these are less frequently used in daily life. The USB 3.0 and 2.0 Type-A interfaces look the same and devices are compatible, but Type-B is different. A 2.0 Type-B cable can be plugged into a 3.0 interface, but not vice versa.

Waterproof Type-C: The star of today's discussion. Currently used as the charging/data interface for most mobile phones, sometimes also as a headphone jack and video output interface. It's also the main interface for Apple's new series of laptops after the 2015 12-inch Macbook.

Compared to traditional USB interfaces, the Type-C interface is reversible, meaning it can be plugged in either way without error. Compared to the similarly slim Micro-B series interfaces, the Type-C interface is simpler and has a lower failure rate.

Secondly, unlike A/B interfaces, USB-C does not have Mini/Micro versions. All C-type interfaces have a unified design, making them very versatile. However, this is predicated on the widespread adoption of Type-C devices; otherwise, it could cause more confusion.

Although USB has been around for a long time, the current mainstream and waterproof Type-C interfaces are only: USB 2.0, USB 3.0 (3.1 Gen1), and USB 3.1 Gen2. Most of the data interfaces we have used and are currently using on mobile phones are based on the USB 2.0 standard, with a theoretical bandwidth of 480Mbps.

The conversion to MB/s is as follows: 80 ÷ 8 × 0.8 = 48MB/s. Multiplying by 0.8 accounts for the transmission loss between 8bit and 10bit. Ignoring finer errors, we will use this method consistently in the following calculations for clarity. Speaking of USB 2.0, many people still think of USB 2.0 flash drives as the current standard. Therefore, when copying data to a computer, the read/write speed generally does not exceed 40MB/s, making it difficult to copy large files.

The later USB 3.0 (later reclassified as USB 3.1 Gen1) increased the bandwidth to 5Gbps. From the Micro-B 2.0 and 3.0 interfaces, we can see that traditional USB interfaces, with different bandwidths and definitions, have different external appearances due to the required pins. The waterproof Type-C interface maintains the same design regardless of whether it's USB 2.0, 3.0 (3.1 Gen1), or 3.1 Gen2 speed.

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