Overview
The SN74LS148N is a high-performance 8-to-3 line priority encoder manufactured by Texas Instruments. This component is designed for digital circuit applications and is known for its reliability, versatility, and compatibility with a wide range of electronic systems. The SN74LS148N takes eight inputs and provides a 3-bit binary output based on the highest priority active input, making it suitable for encoding digital signals in microprocessor systems, address decoding, and data transmission applications.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | SN74LS148N |
| Description | 8-line to 3-line priority encoder |
| Package / Case | 16-DIP (0.300", 7.62mm) |
| Number of Pins | 16 |
| Operating Temperature Range | 0°C ~ 70°C |
| Voltage - Supply | 4.75V ~ 5.25V |
| Number of Inputs | 8 |
| Number of Outputs | 3 |
| Propagation Delay | 21 ns (max) |
| Mounting Type | Through Hole |
| Current - Output High, Low | 400µA, 8mA |
Key Features
- High-Speed Operation: Provides quick encoding of input signals with minimal delay.
- Priority Encoding: Determines the highest priority active input and encodes it into a 3-bit binary output.
- Active-Low Outputs: Generates active-low encoded outputs for easy interfacing with microprocessors and digital logic.
- Wide Operating Voltage Range: Works within standard TTL voltage levels for compatibility with various systems.
- Easy Cascade Capability: Allows multiple SN74LS148N devices to be cascaded for expanded encoding capabilities.
Applications
- Keyboard Encoding: Used in keyboard interfaces to encode key presses into digital signals.
- Range Selection: Utilized in applications requiring the selection of a specific range or value.
- N-Bit Encoding: Suitable for encoding n-bit data lines into a smaller binary or BCD format.
- Code Converters and Generators: Employed in circuits that require the conversion or generation of digital codes.
- Address Decoding: Used in memory and peripheral addressing in microprocessor systems.
- Data Transmission: Applied in data transmission systems to encode data efficiently.
Q & A
- What is the primary function of the SN74LS148N?
The SN74LS148N is an 8-to-3 line priority encoder, which takes eight inputs and provides a 3-bit binary output based on the highest priority active input.
- What is the operating voltage range of the SN74LS148N?
The operating voltage range of the SN74LS148N is 4.75V to 5.25V).
- What is the propagation delay of the SN74LS148N?
The propagation delay of the SN74LS148N is up to 21 ns).
- What type of package does the SN74LS148N come in?
The SN74LS148N comes in a 16-pin PDIP (Plastic Dual In-Line Package) package).
- What are the typical applications of the SN74LS148N?
The SN74LS148N is typically used in keyboard encoding, range selection, n-bit encoding, code converters and generators, address decoding, and data transmission applications).
- Can the SN74LS148N be cascaded for expanded encoding capabilities?
Yes, the SN74LS148N allows multiple devices to be cascaded for expanded encoding capabilities).
- What is the operating temperature range of the SN74LS148N?
The operating temperature range of the SN74LS148N is 0°C to 70°C).
- What is the current output capability of the SN74LS148N?
The SN74LS148N has an output current capability of 400µA (high) and 8mA (low)).
- Is the SN74LS148N compatible with TTL logic levels?
Yes, the SN74LS148N is compatible with standard TTL voltage levels).
- How many inputs and outputs does the SN74LS148N have?
The SN74LS148N has 8 inputs and 3 outputs).
