The 74HC158 is a high-speed Si-gate CMOS device that is pin-compatible with low-power Schottky TTL (LSTTL). Compliant with JEDEC standard no. 7A, this quad 2-input multiplexer is designed to select 4 bits of data from two sources, controlled by a common data select input (S). The selected data is presented on the four outputs in an inverted form, with an active LOW enable input (E).
Key Features:
- Quad 2-Input Multiplexer: Selects data from two sources and presents it in an inverted form on four outputs.
- Common Data Select Input (S): Determines which data source is selected.
- Active LOW Enable Input (E): When E is HIGH, all outputs (1Y to 4Y) are forced HIGH regardless of other input conditions.
- Versatile Applications: Ideal for moving data from two groups of registers to four common output buses, and for use as a function generator. It can implement any four of the 16 different functions of two variables with one variable common.
Logic Implementation:
- The 74HC158 functions as a 4-pole, 2-position switch, with the switch position determined by the logic levels applied to S.
- The logic equations for the outputs are:
- 1Y = E·(1I1·S 1I0·S)
- 2Y = E·(2I1·S 2I0·S)
- 3Y = E·(3I1·S 3I0·S)
- 4Y = E·(4I1·S 4I0·S)
Comparison:
- The 74HC158 is identical to the 74HC157, except it has inverting outputs.
Benefits:
- High-Speed Performance: Ensures quick and efficient data processing.
- Low-Power Consumption: Suitable for power-sensitive applications.
- Flexible Data Handling: Easily moves data between registers and common output buses.
Applications:
- Data multiplexing in digital systems.
- Function generation and implementation of complex logic functions.
- Bus-oriented systems for data routing.
Package Includes:
1 x 74HC158 - Quad 2-Input Multiplexer IC - SOIC-16 SMD Package
Note: Product images are for illustrative purposes only and may differ from the actual product.
