SN74HC148DR

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SN74HC148DR

IC PRIORITY ENCOD 1 X 8:3 16SOIC

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Thông số kỹ thuật

Package Tape & Reel (TR),Cut Tape (CT),Bulk
Series 74HC
ProductStatus Active
Type Priority Encoder
Circuit 1 x 8:3
IndependentCircuits 1
Current-OutputHighLow 5.2mA, 5.2mA
VoltageSupplySource Single Supply
Voltage-Supply 2V ~ 6V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 16-SOIC (0.154, 3.90mm Width)

Tổng quan

Description

The SN74HC148DR is an 8-to-3 line priority encoder from Texas Instruments, part of the HC (High-speed CMOS) series. It encodes eight input lines into three output lines, providing a binary representation of the highest-priority active input. The device features a low active logic level, meaning that when an input is active (logic low), it will be prioritized according to its order (D0 to D7).
Key features include:
- Priority Encoding: Automatically prioritizes the highest active input.
- Wide Supply Voltage Range: Operates typically from 2V to 6V.
- Low Power Consumption: Suitable for battery-operated devices.
- Fast Switching Speed: With a maximum propagation delay of about 15 ns at 5V, it supports high-speed applications.
- Multiple Packaging Options: The DR designation indicates it is in a small-outline package (SOIC).
The SN74HC148DR is commonly used in applications like data multiplexing, digital signal processing, and communication systems, where efficient encoding of multiple signals is crucial.

Features

The SN74HC148DR is a high-speed 8-line to 3-line priority encoder from Texas Instruments. Key features include:
1. Functionality: Converts up to 8 input lines to a 3-bit binary output while providing priority to the highest-order input line that is active.
2. Logic Family: Part of the HC (High-Speed CMOS) series, offering fast switching speeds and low power consumption.
3. Operating Voltage: Typically operates between 2V and 6V, suitable for a wide range of applications.
4. Output Type: TTL-compatible outputs ensure compatibility with other logic families.
5. Temperature Range: Standard operating temperature range from -40°C to 125°C.
6. Package Type: Available in a 16-pin SOIC (Small Outline IC) package for space-efficient designs.
7. Enable Pins: Includes enable inputs for controlling the device operation.
8. Applications: Commonly used in data encoding, priority applications, and digital signal processing.
These features make the SN74HC148DR a versatile component for digital circuit design.

Package

The SN74HC148DR is packaged in a TSSOP (Thin Shrink Small Outline Package) with 16 pins.

Pinout

The SN74HC148DR is an 8-input priority encoder. It consists of 16 pins. Here’s a brief overview of its pin configuration and functions:
1. A0-A2 (Pins 1-3): These are the three least significant inputs for the encoder.
2. I0-I7 (Pins 4-11): These are the eight data inputs (I0 to I7), where each input can represent a high priority signal.
3. EN (Pin 12): This is the active-low enable input. When high, the encoder is disabled.
4. G (Pin 13): This pin indicates a valid output when low, signaling that at least one input is active.
5. Y0-Y2 (Pins 14-16): These are the three outputs which represent the binary value of the highest priority active input.
6. VCC (Pin 15): Positive power supply.
7. GND (Pin 8): Ground connection.
In summary, the SN74HC148DR encodes an active input into a binary representation while providing priority, with additional control signals for operation.

Manufacturer

The SN74HC148DR is manufactured by Texas Instruments (TI), a leading global semiconductor company. Founded in 1930, Texas Instruments designs and produces a wide range of semiconductor products, including analog, embedded processing, and digital signal processing solutions. The company is renowned for its innovation in integrated circuits and is a major supplier to the electronics industry, serving sectors such as telecommunications, automotive, industrial, and consumer electronics. TI's focus on research and development has established it as a key player in the semiconductor market, providing cutting-edge technology and products for a variety of applications.

Application

The SN74HC148DR is an 8-input priority encoder used in various applications such as data communication systems, digital signal processing, and microcontroller interfacing. It can prioritize multiple input signals and convert them into binary outputs, making it useful in keyboard encoding, interrupt handling, and resource allocation in digital circuits. Additionally, it is applied in automotive electronics, industrial automation, and consumer electronics for efficient data management and control.

Equivalent

The SN74HC148DR is an 8-input priority encoder. Equivalent products include the 74HC148, MC14536, and 74HC148A. Other alternatives can be found in similar logic families like the 74HCT148 and CD148. Always verify specifications for compatibility in applications.

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