ON Semiconductor MC74HC595DT: 8-Bit Shift Register with Output Latches

The MC74HC595DT from ON Semiconductor is a high-performance, 8-bit serial-in/parallel-out shift register with a storage register and 3-state outputs. This integrated circuit (IC) is a versatile component designed for applications in serial-to-parallel data conversion, and it is widely used in microprocessor-controlled systems to expand the output ports.

Constructed with silicon gate CMOS technology, the MC74HC595DT offers significant advantages in terms of power consumption and functionality. Its low-power operation makes it suitable for battery-operated and portable devices, while its high-speed performance ensures swift data processing in demanding applications.

The device features two registers: a shift register and a storage register. Data is shifted into the shift register on the rising edge of the clock signal, and then transferred to the storage register with a latch enable (LE) pulse. Once latched, the data is available at the outputs until the next refresh cycle. The outputs can drive up to 15 LSTTL loads, and when in the high-impedance state, they neither load nor drive the bus lines significantly, which is ideal for bidirectional bus applications.

Key features of the MC74HC595DT include:

• 8-bit serial input
• 8-bit parallel output
• Shift register with direct clear
• Output drive capability: 15 LSTTL loads
• High-impedance state during power-up and power-down
• Multiple package options
• Operating voltage range: 2V to 6V
• Low input current: 1µA maximum

Due to its flexible operation modes, the MC74HC595DT can be utilized in a broad range of applications, including digital displays, LED matrices, data acquisition systems, and other logic interface circuits. It enables the user to increase the number of outputs without increasing the number of I/O pins on a microcontroller, making it an essential part of modern electronic design.

ON Semiconductor provides the MC74HC595DT in a TSSOP-16 package, ensuring compactness and ease of integration into various PCB designs. With its robust performance and ON Semiconductor's commitment to quality, this shift register is a reliable choice for designers looking to optimize their digital systems.