SN74LS148M

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SN74LS148M

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74LS148 - 10-LINE-TO-4-LINE AND

  • Manufactureronsemi

  • Mfr. Part #SN74LS148M

  • In Stock9722

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Specifications

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Overview

Description

The SN74LS148M is an integrated circuit (IC) from Texas Instruments, part of the 74LS series of TTL (Transistor-Transistor Logic) devices. It is an 8-to-3 line priority encoder, which means it takes up to eight input lines and encodes them into a 3-bit binary output. The device gives priority to the highest-order input line, ensuring that the highest priority input is always represented at the output when multiple inputs are active.
Key features of the SN74LS148M include:
1. Priority Encoding: It resolves multiple active inputs by prioritizing the highest order input.
2. Active Low Inputs and Outputs: Both inputs and outputs are active low, meaning they are enabled when a logical zero is applied.
3. Enable Input and Output: It includes enable inputs and outputs for cascading multiple devices.
4. Cascadable: You can combine multiple SN74LS148M chips to handle more input lines.
5. Compact Package: Typically available in small-outline packages suitable for space-constrained applications.
This IC is widely used in digital circuits where input line prioritization and binary encoding are required, such as in data selection and multiplexing systems.

Equivalent

The SN74LS148M is a TTL 8-to-3 line priority encoder. Equivalent products include:
1. 74HC148
2. 74HCT148
3. 74F148
4. NTE74LS148
These chips perform similar functions and can be used in projects requiring priority encoding, though electrical characteristics like supply voltage and current might differ slightly. Always check the datasheet for compatibility with your application.

Features

The SN74LS148M is an 8-line to 3-line priority encoder from the 74LS series of TTL logic integrated circuits. Key features include:
1. Priority Encoding: It prioritizes inputs, encoding the highest-order active input line to a 3-bit binary output.
2. Cascading Capability: Facilitates the cascading of multiple units for encoding more than 8 inputs.
3. Active Low Inputs/Outputs: Both input and output lines are active low, meaning they respond to a logic level of zero.
4. Data Output: Provides a 3-bit binary code corresponding to the highest priority active input.
5. Enable Inputs: Includes active low enable inputs (EI and E2) and enable output (EO) for expansion and control.
6. Propagation Delay: Offers a fast propagation delay, typically around 21 ns, suitable for high-speed operations.
7. Package Type: Available in a 16-pin SOIC package.
8. Operating Temperature: Designed for a range of 0°C to 70°C.
9. Power Supply: Operates with a standard TTL power supply of 5V.
These features make the SN74LS148M suitable for applications requiring priority signal encoding and efficient data handling.

Pinout

The SN74LS148M is an 8-to-3 line priority encoder. It is typically housed in a 16-pin package. The key function of the SN74LS148M is to encode the highest priority input, out of 8 input lines, into a 3-bit binary code. In addition to the 8 input lines (I0 to I7), it includes 3 output lines (Y0 to Y2), an active low enable input (EI), an active low enable output (EO), and a Group Select (GS) output. The IC prioritizes the inputs based on the highest numbered input line (I7 being the highest priority and I0 the lowest). When multiple inputs are active, it outputs the code corresponding to the highest priority active input. The device also features an active low enable output and group select output, which can be used for cascading multiple encoders in larger systems.

Manufacturer

The SN74LS148M is manufactured by Texas Instruments Incorporated (TI). Texas Instruments is a global semiconductor company that designs and produces a wide array of analog and embedded processing chips. They are known for their innovation in semiconductor technology and their products are widely used in various industries including consumer electronics, automotive, industrial, and communications equipment. TI focuses on developing products that help customers manage power, process data, and provide connectivity. Established in 1930, the company has a long history of technological advancements and remains a leader in the electronics industry.

Application

The SN74LS148M is a priority encoder integrated circuit used in digital electronics. Key application areas include:
1. Digital Data Processing: Prioritizing multiple input signals for data encoding.
2. Interrupt Handling: Managing interrupt signals in microprocessor systems.
3. Binary Encoding: Converting 8-line inputs to 3-line binary outputs, useful in simplifying circuit designs.
4. Signal Multiplexing: Selecting and routing high-priority signals in communication systems.
5. Control Systems: Implementing priority control in automation and control applications.
These features make it suitable for use in embedded systems, communication devices, and industrial automation.

Package

The SN74LS148M is a digital integrated circuit housed in a small-outline integrated circuit (SOIC) package. It is part of the 74LS series and functions as an 8-line to 3-line priority encoder. The "M" designation typically refers to a SOIC package, which is a surface-mount technology that allows for more compact circuit designs.

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