1 Introduction

The 2N7001T is a single bit unidirectional level shifter device. This voltage signal converter uses two separate configurable power supply rails to translate an unidirectional signal up or down. The device helps system designers implement unidirectional level shifting solutions while reducing component count and board space compared to discrete level shifting implementations. The key features for this device are listed in Table 1-1:

Signal level shifting is necessary to enable communication between two devices which are operating at different voltage levels. A common level shifting example would be the communication of a processor I/O at 1.8 V and a peripheral device I/O that operates at 3.3 V. The 2N7001T is able to provide a great solution to level shifting due to the buffered architecture of the device. Watch 2N7001T Introduction and refer to the application report Common Risks of Discrete FET Voltage Translation and Advantages of TI's Ontegrated 2N7001T Level Shifter.

This device can be utilized for common communication interface standards such as Serial Peripheral Interface (SPI), Universal asynchronous receive transmit (UART), Joint Test Access Group (JTAG), or the General purpose Input output (GPIO) pins such as enable or restart. The basics of these interfaces as well as the operation of the 2N7001T level shifter with these standard interfaces are discussed in the following sections. Examples of level translation used in building automation like video doorbell and personal electronics applications such as wireless speakers are discussed as well. Figure 1-1 and Figure 1-2 shows the leaded SC-70 DCK package and the non-leaded X2SON DPW package that the 2N7001T device is available in.

Figure 1-1 2N7001T DCK (SC-70) Package

Figure 1-2 2N7001T DPW (X2SON) Package