SN74HC595DTR

The SN74HC595DTR is a high-performance, low-power, high-speed CMOS shift register designed for use in digital systems where serial-to-parallel data conversion and expansion of I/O ports are required. It belongs to the 74HC logic family, which is compatible with the standard 74LS logic family in terms of speed, function, and pin-out.

Key Features:

1. 8-Bit Serial-In, Parallel-Out Shift Register:
   • The SN74HC595DTR contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register.
   • Data is shifted into the register on the rising edge of the serial clock (SCK) input and is available at the parallel outputs (Q0 to Q7) on the rising edge of the storage clock (ST_CP) input.
2. Three-State Outputs:
   • The parallel outputs (Q0 to Q7) are three-state, meaning they can be placed in a high-impedance state via the output enable (OE) input.
   • This allows for easy interfacing with other devices on the bus line without loading or driving the bus significantly.
3. Low Power Consumption:
   • The SN74HC595DTR is manufactured using advanced CMOS technology, resulting in low power consumption.
   • It has a maximum quiescent current of 80µA, making it suitable for use in battery-powered devices or systems with strict power budget constraints.
4. High Noise Immunity:
   • The IC has high noise immunity, thanks to its CMOS design.
   • This makes it resistant to external interference, ensuring reliable data transmission in noisy environments.
5. Wide Operating Voltage Range:
   • The SN74HC595DTR operates over a wide voltage range of 2V to 6V.
   • This flexibility allows it to be used in a variety of digital circuits with different power supply requirements.
6. Cascadable Design:
   • The serial output (Q7′) of the SN74HC595DTR can be connected to the serial input (DS) of another SN74HC595DTR, allowing for multiple devices to be cascaded together.
   • This feature enables the expansion of I/O ports and the creation of larger serial-to-parallel converters.
7. Asynchronous Reset:
   • The IC has an asynchronous low-level reset (MR) input that clears the shift register to zero and places the parallel outputs in a high-impedance state.
   • This feature allows for easy initialization and resetting of the device.
8. Package Options:
   • The SN74HC595DTR is available in various package options, such as DIP, SOP, TSSOP, etc., providing flexibility for integration into existing circuits.

Applications:

• The SN74HC595DTR is ideal for use in applications such as LED display controllers, digital signage, microprocessor I/O expansion, and other digital systems where serial-to-parallel data conversion and I/O port expansion are required.
• It can also be used in electronic gaming machines, where it can provide additional I/O ports for connecting buttons and controlling LEDs.

In summary, the SN74HC595DTR is a versatile and reliable CMOS shift register with 8-bit serial-in, parallel-out functionality, three-state outputs, low power consumption, high noise immunity, and a wide operating voltage range. Its cascadable design and asynchronous reset feature make it an ideal choice for a wide range of digital applications.