74LV165AD-Q100J

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Introduction

74LV165AD-Q100J is a low-voltage serial-in, parallel-out (SIPO) 8-bit shift register. It features an on-chip logic-level translator. The chip is designed to interface 5V logic signals to 3.3V or 2.5V logic devices. It is intended for applications such as regulator sequencing, latching, data communication and memory interfacing.

Application Field

74LV165AD-Q100J is versatile and lightweight. It has various application fields such as:

• Data multiplexing/demultiplexing
• Computer memory interfacing
• Data acquisition
• High-speed logic
• Microprocessor bus interface
• Power up and down sequence control
• Address decoding

Working Principle

The 74LV165AD-Q100J contains eight 8-bit registers and has three control inputs (Serial Clock, Parallel Load and Serial Input). All three inputs are active-low logic. When the Shift/Load input is low, data will be shifted in the register, while a high logic level at the Shift/Load input will load the data into the register. The load signal will also reset the DP (Data Pointer) to the beginning position. The outputs on the chip are D0–D7, representing the 8 individual 8-bit registers. The Serial Clock (SC) input is used to clock the data in from the Serial Input (SI) pin. Data is shifted in one bit per clock cycle and is stored in each register from left to right (e.g. D0–D7).

Conclusion

The 74LV165AD-Q100J is an 8-bit SIPO shift register that is used for many applications such as data multiplexing/demultiplexing, computer memory interfacing and power up and down sequence control. It features an on-chip logic-level translator and is designed to interface 5V logic signals to 3.3V or 2.5V logic devices. The chip contains eight 8-bit registers and has three control inputs. Data is shifted in one bit per clock cycle and is stored in each register from left to right.

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