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74LS194 - 4-Bit Bi-directional Shift Register IC

SKU: JPN5I8NP23
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4.9 (66 reviews)
The 74LS194 is a high-speed 4-bit bi-directional universal shift register IC designed for serial and parallel data transfer applications. It can shift data left, right, load parallel data, or hold the current data, making it one of the most versatile shift register ICs in the 74LS logic family. The IC features four D-type flip-flops with parallel inputs and outputs, separate...
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The 74LS194 is a high-speed 4-bit bi-directional universal shift register IC designed for serial and parallel data transfer applications. It can shift data left, right, load parallel data, or hold the current data, making it one of the most versatile shift register ICs in the 74LS logic family.

The IC features four D-type flip-flops with parallel inputs and outputs, separate serial inputs for left and right shifting, and mode selection inputs that determine the operating function. It also includes a master reset input for quickly clearing all stored data.

The 74LS194 is widely used in digital electronics, microprocessor systems, communication circuits, data buffering, LED display control, digital signal processing, and educational electronics projects. It is available in a standard DIP-16 package and is compatible with TTL logic levels.

Key Features

  • 4-bit universal shift register
  • Bi-directional data shifting
  • Supports left and right shift operations
  • Parallel data loading capability
  • Data hold function
  • Asynchronous master reset
  • High-speed TTL operation
  • Separate serial inputs for both shift directions
  • Four parallel outputs
  • Low power consumption
  • TTL-compatible logic levels
  • High noise immunity
  • Standard DIP-16 package
  • Ideal for digital electronics and embedded applications

Shipping & Returns

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Specifications

Specifications:

IC Type: Universal Bi-Directional Shift Register
Part Number: 74LS194
Logic Family: Low-Power Schottky TTL (LS)
Package Type: DIP-16
Register Size: 4 Bits
Shift Direction: Left and Right
Operating Modes: Hold, Shift Left, Shift Right, Parallel Load
Operating Voltage: 4.75V to 5.25V DC
Recommended Operating Voltage: 5V DC
Logic Input Levels: TTL Compatible
Maximum Clock Frequency: Approximately 35MHz
Propagation Delay: Approximately 20ns to 30ns
Output Type: TTL Push-Pull Outputs
Parallel Inputs: 4
Parallel Outputs: 4
Serial Inputs: Shift Left Input and Shift Right Input
Clock Input: Positive Edge Triggered
Master Reset: Asynchronous Active LOW
Operating Temperature: 0°C to +70°C
Storage Temperature: -65°C to +150°C
Mounting Type: Through-Hole
Package Dimensions: Standard DIP-16
Compatibility: TTL Logic Systems, Arduino, STM32, FPGA, Digital Logic Trainers (with appropriate voltage interfacing)

Additional Resources

74LS194.PDF

FAQ

1. What is the 74LS194 IC used for?

The 74LS194 is used for shifting, storing, and transferring digital data in both left and right directions. It is commonly used in digital communication systems, data buffering, LED displays, and microprocessor interfacing.

2. What makes the 74LS194 a universal shift register?

The 74LS194 supports four operating modes: hold, shift left, shift right, and parallel load. This versatility allows it to perform multiple data handling functions within a single IC.

3. Can the 74LS194 shift data in both directions?

Yes. The IC supports both left and right serial shifting through separate serial input pins, making it suitable for bidirectional data transfer applications.

4. What is the purpose of the Master Reset pin?

The Master Reset (MR) pin asynchronously clears all stored data in the register when driven LOW, regardless of the clock signal.

5. What applications commonly use the 74LS194 IC?

The 74LS194 is widely used in digital communication systems, serial and parallel data conversion, LED display control, industrial automation, data buffering, digital logic circuits, and educational electronics projects.