SY100EPT20VKI

Logic circuits create digital signals by outputting either a 0 or 1 for every given input. Often, two logic circuits must exchange digital signals, but the two logic circuits may have voltage levels that are different from each other. In this case, a translator or level shifter device such as the SY100EPT20VKI is used to bridge between these two digital signals. In this article, we will be taking a closer look at the SY100EPT20VKI\'s application fields and working principle.

Application Fields

The SY100EPT20VKI is a dual-channel logic level translator/ level shifter. It is designed to enable the connection of systems or systems-on-chips (SoCs) that operate at different voltage levels. It can support bidirectional and unidirectional signal transmission and switches over signals quickly, making it suitable for many applications.

One of the main uses of the SY100EPT20VKI is to provide compatibility between 3.3V and 5V logic circuits. The device supports operation in either low voltage (3.3V) or high voltage (5V) logic systems. When hooked up to a logic signal with a voltage greater than 3.3V, the level shifter will shift the input signal and output a 3.3V signal, and vice-versa for signals under 3.3V. This makes is it ideal for connecting the 3.3V and 5V protected networks in embedded systems, particularly in automotive systems.

The SY100EPT20VKI can also be used to connect CPUs in network systems, digital audio and multimedia devices. This is due to its fast switching time, which is less than 100ns. Additionally, the device is also used in space-constrained applications, as it only takes up an area of just 8-pin SSOP.

Working Principle

The SY100EPT20VKI comprises nine built-in transistors and is composed of two channels. Each channel is controlled independently and the level shift is adjusted by configuration pins. This level shifter has four configuration pins and they can be used to conveniently select either 2-bit operation or 1-bit operation. This allows the SY100EPT20VKI to be used in a wide range of applications.

In terms of signal transmission, the signal from the signal input pin is transmitted through transistors, which creates both high and low voltage signal levels. When the low voltage (LV) signal level is greater than the high voltage (HV) signal level, the signal is converted from HV to LV level. On the other hand, when the LV signal level is lower than the HV signal level, the signal is converted from LV to HV level.

To provide additional protection for signals, the SY100EPT20VKI also features resistors. The high resistors protect the circuitry against high voltage transients and prevent the shift of noise. The low resistors protect the LV side circuits against over-voltage and they provide impedance matching to prevent signal distortion.

Conclusion

The SY100EPT20VKI is a versatile logic level translator/ level shifter that supports both low voltage (3.3V) and high voltage (5V) operations. It is used to bridge the gap between two digital signals with different voltage levels, allowing them to communicate efficiently. The SY100EPT20VKI is also ideal for use in space-constrained applications, as it requires only an 8-pin SSOP footprint.