74194 IC 4-Bit Bidirectional Universal Shift Register

74194 IC 4-Bit Bidirectional
Universal Shift Register

The
74LS194
is a monolithic integrated circuit representing a 4-bit bidirectional universal shift register. It is engineered to be a highly versatile component, incorporating a comprehensive set of features that cater to the complex needs of digital system design. Its primary role is to store and move data in a flexible manner, operating on four bits of information simultaneously. The universal aspect of its design signifies its ability to handle multiple data movement operations, making it a fundamental building block for various digital logic systems beyond a simple storage register.

This devices key characteristic is its four distinct modes of operation, which are selected through two mode control inputs. It can perform a synchronous parallel load, where all four data bits are entered at once. Additionally, it can shift data synchronously to the right or to the left, with a dedicated serial input for each direction. The fourth mode inhibits the clock, effectively pausing all operations and maintaining the current data. This multi-mode capability allows it to replace several less-featured components in a design.

Operation is governed by a positive edge-triggered clock, ensuring that all actions are synchronized to a single, precise moment in time. The register also includes a direct overriding clear line, which, when activated, immediately and asynchronously resets all outputs to a low state, regardless of the other input conditions. This combination of synchronous data handling for shifts and loads with an asynchronous clear provides designers with both precise control and an immediate reset capability.

Features:

Parallel Inputs and Outputs

Four Operating Modes: Synchronous Parallel Load, Right Shift, Left Shift, and Inhibit Clock (Do Nothing)

Positive Edge-Triggered Clocking

Direct Overriding Clear

Right-Shift and Left-Shift Serial Inputs

Specifications:

Product Attribute

Attribute Value

Product Category:

Counter Shift Registers

Counting Sequence:

Serial/Parallel to Parallel

Number of Circuits:

1

Number of Bits:

4 bit

Package/Case:

PDIP-16

Logic Family:

74LS

Logic Type:

Bipolar

Number of Input Lines:

2 / 1

Propagation Delay Time:

26 ns

Supply Voltage Max:

5.25 V

Minimum Operating Temperature:

0 C

Maximum Operating Temperature:

+ 70 C

Packaging:

Tube

Function:

Shift Register

Mounting Style:

Through Hole

Number of Output Lines:

1

Operating Supply Voltage:

4.75 V to 5.25 V

Operating Temperature Range:

0 C to + 70 C

Product Type:

Counter Shift Registers

Applications:

Data Shifting and Storage.

Serial-to-Parallel Conversion.

Parallel-to-Serial Conversion.

Ring Counters.

Sequence Generators.

Package Contents:

1x
74194 IC 4-Bit Bidirectional Universal Shift Register

Datasheet