SN74HC595DBR Texas Instruments SN74HC595DBR – 8-Bit Serial-In, Parallel-Out Shift Register with Tri-State Outputs

SN74HC595DBR 8-Bit Serial-In, Parallel-Out High-Performance Shift Register for LED Multiplexing, Data Storage, and More

The SN74HC595DBR Shift Register from Texas Instruments is a high-speed, low-power 8-bit serial-in, parallel-out shift register with tri-state outputs. Designed for use in LED displays, network switches, servo control, and data buffering, this IC allows microcontrollers to control multiple outputs using just three pins (SER, CLK, LATCH).

Part of the 74HC logic family, it features CMOS-level inputs for low power consumption and a 24MHz max clock speed, making it ideal for high-efficiency digital systems.

Technical Specifications

Applications

1. LED Matrix & Display Control

• Used in LED drivers, 7-segment displays, and dot-matrix panels to reduce microcontroller pin usage.
• Example: ESP32/Arduino driving 64 LEDs with just 3 pins.

2. Servo & Motor Control

• Manages multiple PWM signals for robotics and servo arrays.
• Example: Driving 8 servo motors from a single microcontroller.

3. Digital Data Buffering & Storage

• Acts as a serial-to-parallel FIFO buffer in network switches and IoT devices.
• Example: Storing configuration data in embedded systems.

4. High-Speed Serial Communication

• Cascades with multiple SN74HC595 for 16-bit, 24-bit, or more expansion.
• Example: LED light show controllers with chained registers.

Functional Description

The Texas Instruments SN74HC595DBR Shift Register consists of:

1. Shift Register (Serial Input → Parallel Output)
   • Data enters via SER (Serial Input), shifted in with SRCLK (Shift Clock).
   • After 8 bits, data moves to the Storage Register via RCLK (Latch Clock).
2. Output Enable (OE) Control
   • When OE is HIGH, outputs are high-impedance (tri-state).
   • When OE is LOW, stored data appears on outputs.
3. Cascading Capability
   • QH’ (Serial Output) connects to the next SN74HC595’s SER pin for expansion.

Why Choose SN74HC595DBR Shift Register?

✅ Wide Compatibility – Works with 5V, 3.3V, or mixed-voltage logic systems.
✅ Industrial Temperature Range – Reliable in automotive, industrial, and military applications.
✅ Space-Efficient SSOP-16 Package – Ideal for compact PCB designs.

Alternatives & Cross-References

Ordering & Packaging

For bulk orders (OEM pricing), contact our sales team.

Datasheet & Resources

📄 Download Full Datasheet (SN74HC595.PDF)
🔧 Arduino Example Code

Final Summary

The TI SN74HC595DBR Shift Register is a versatile shift register for LED control, digital storage, and I/O expansion. With tri-state outputs, high speed (24MHz), and low power, it remains a top choice for embedded designers.

🔹 Best For: LED matrices, servo control, serial data buffering.
🔹 Alternatives: If higher current is needed, consider TPIC6B595.