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74HC595 - 8-Bit Serial-to-Parallel Shift Register IC

SKU: MAPZNTTQA3
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The 74HC595 is a high-speed 8-bit Serial-in, Parallel-out (SIPO) Shift Register IC designed to expand the number of digital output pins available on a microcontroller. It converts serial data received on a single data line into eight parallel outputs, allowing multiple LEDs, displays, relays, or other digital devices to be controlled using only three microcontroller pins. The IC features an...
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The 74HC595 is a high-speed 8-bit Serial-in, Parallel-out (SIPO) Shift Register IC designed to expand the number of digital output pins available on a microcontroller. It converts serial data received on a single data line into eight parallel outputs, allowing multiple LEDs, displays, relays, or other digital devices to be controlled using only three microcontroller pins.

The IC features an 8-bit shift register, an 8-bit storage (latch) register, and tri-state output drivers, enabling glitch-free output updates and easy cascading of multiple ICs to control virtually unlimited outputs. The 74HC595 supports high-speed CMOS operation while maintaining low power consumption.

Housed in a standard DIP-16 package, the 74HC595 is widely used in Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC, and FPGA-based projects for LED control, 7-segment displays, LCD interfaces, relay boards, and industrial automation systems.

Key Features

  • 8-bit Serial-in, Parallel-out (SIPO) shift register
  • Separate shift register and storage register
  • Eight latched parallel outputs
  • Tri-state output drivers
  • High-speed CMOS operation
  • Cascadable for unlimited output expansion
  • Low power consumption
  • Wide operating voltage range
  • High noise immunity
  • Glitch-free output updates
  • Compatible with TTL and CMOS logic levels
  • Direct interface with Arduino, ESP32, STM32, and Raspberry Pi
  • Available in standard DIP-16 package
  • Ideal for digital output expansion and LED driving

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Specifications

Specifications:

IC Type: Serial-to-Parallel Shift Register
Part Number: 74HC595
Logic Family: High-Speed CMOS (HC)
Package Type: DIP-16
Function: 8-Bit Serial-In Parallel-Out (SIPO) Shift Register with Output Latch
Number of Shift Register Bits: 8
Number of Parallel Outputs: 8
Operating Voltage: 2V to 6V DC
Recommended Operating Voltage: 5V DC
Logic Input Levels: TTL and CMOS Compatible
Maximum Clock Frequency: Up to 25MHz (at 4.5V Typical)
Propagation Delay: Approximately 13ns (Typical)
Output Current: ±6mA per Output (Typical)
Output Type: Tri-State Push-Pull Outputs
Output Enable: Active LOW (OE)
Latch Control: Separate Storage Register Clock (STCP)
Master Reset: Active LOW (MR)
Operating Temperature: -40°C to +85°C
Storage Temperature: -65°C to +150°C
Mounting Type: Through-Hole
Package Dimensions: Standard DIP-16
Compatibility: Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC, FPGA

Additional Resources

74HC595.PDF

FAQ

1. What is the 74HC595 IC used for?

The 74HC595 is used to expand the number of digital output pins on a microcontroller by converting serial data into eight parallel outputs. It is commonly used to control LEDs, 7-segment displays, relay modules, and other digital devices.

2. How many outputs does the 74HC595 provide?

The IC provides 8 latched parallel digital outputs, and multiple 74HC595 ICs can be cascaded together to create virtually unlimited output channels.

3. Can the 74HC595 be used with Arduino and ESP32 boards?

Yes. The 74HC595 is fully compatible with Arduino, ESP32, STM32, Raspberry Pi Pico, AVR, PIC, and other microcontrollers using only three control pins: Data, Clock, and Latch.

4. What is the purpose of the latch pin (STCP)?

The latch pin transfers the shifted serial data from the internal shift register to the output register, allowing all outputs to update simultaneously without glitches.

5. What is the advantage of using the 74HC595 instead of connecting devices directly to a microcontroller?

The 74HC595 significantly reduces the number of GPIO pins required by a microcontroller while allowing control of multiple digital outputs. It also supports cascading, making it ideal for large LED displays, relay boards, and other output expansion applications.