74HC595D

The 74HC595D is an 8-bit serial-in, parallel-out shift register with a storage register and is part of the 74HC family of high-speed CMOS logic devices. Manufactured by Toshiba, this integrated circuit is widely used in digital applications for expanding the number of output pins available from microcontrollers and microprocessors.

Key Features:

1. 8-Bit Shift Register: The 74HC595D can store and shift 8 bits of data, making it ideal for applications that require controlling multiple outputs with minimal pin usage.

2. Serial Input: Data is input serially through a single data pin (DS), allowing for easy connection to microcontrollers that may have limited output pins.

3. Parallel Output: The device provides 8 parallel outputs (Q0 to Q7), which can drive LEDs, relays, or other digital devices directly.

4. Clock Input: The shift register is clocked by a rising edge on the clock pin (SH_CP), which shifts the data from the serial input to the output register.

5. Latch Functionality: The 74HC595D includes a latch (ST_CP) that allows the stored data to be held stable at the outputs until new data is shifted in. This means that the outputs can be updated without affecting the current state.

6. Output Enable: The device features an output enable pin (OE) that can disable the outputs, allowing for power savings and preventing unwanted changes during data loading.

7. High-Speed Operation: The 74HC595D operates at high speeds, with a maximum clock frequency of up to 100 MHz, making it suitable for fast applications.

8. Wide Supply Voltage Range: It operates with a supply voltage range of 2V to 6V, making it compatible with various logic levels.

9. Low Power Consumption: As a CMOS device, it has low static power consumption, which is beneficial for battery-operated devices.

10. Temperature Range: The device is rated for operation over a wide temperature range, typically from -40°C to +125°C, ensuring reliability in various environments.

Pin Configuration:

The 74HC595D typically comes in a 16-pin dual in-line package (DIP) or surface mount package (SOIC). The pin configuration includes:

• Pin 1 (Q1): Output 1
• Pin 2 (Q2): Output 2
• Pin 3 (Q3): Output 3
• Pin 4 (Q4): Output 4
• Pin 5 (Q5): Output 5
• Pin 6 (Q6): Output 6
• Pin 7 (Q7): Output 7
• Pin 8 (GND): Ground
• Pin 9 (Q7'): Serial out (for cascading multiple 74HC595D devices)
• Pin 10 (MR): Master reset (active low)
• Pin 11 (OE): Output enable (active low)
• Pin 12 (ST_CP): Storage register clock input
• Pin 13 (SH_CP): Shift register clock input
• Pin 14 (DS): Serial data input
• Pin 15 (VCC): Supply voltage
• Pin 16 (NC): No connection

Applications:

The 74HC595D is commonly used in various applications, including:

• LED displays and lighting control
• Driving multiple outputs from microcontrollers
• Data communication in digital circuits
• Expanding GPIO pins in embedded systems
• Shift register-based data storage and manipulation

In summary, the 74HC595D from Toshiba is a versatile and efficient component for managing multiple outputs in digital circuits, making it a popular choice among engineers and hobbyists alike.