Texas Instruments
Das Bild kann eine Darstellung sein.
Siehe Spezifikationen für Produktdetails.
CD74HC299ME4
Im Detail sehen Datenblätter

CD74HC299ME4

Product Overview

  • Category: Integrated Circuit
  • Use: Data Storage and Transfer
  • Characteristics: High-Speed, Serial-to-Parallel/Parallel-to-Serial Conversion
  • Package: 20-pin SOIC (Small Outline Integrated Circuit)
  • Essence: Shift Register with Parallel Load and Asynchronous Clear
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage: 2V to 6V
  • Operating Temperature Range: -40°C to +85°C
  • Input Voltage Levels: CMOS/TTL Compatible
  • Output Voltage Levels: CMOS
  • Maximum Clock Frequency: 74 MHz
  • Number of Flip-Flops: 8
  • Data Transfer Rate: 74 Mbps

Detailed Pin Configuration

  1. CP (Clock Pulse) - Input
  2. PL (Parallel Load) - Input
  3. DS (Serial Data Input) - Input
  4. QH' (Serial Data Output) - Output
  5. QH (Serial Data Output) - Output
  6. SER (Serial Data Input) - Input
  7. GND (Ground) - Ground
  8. QG (Parallel Data Output) - Output
  9. QF (Parallel Data Output) - Output
  10. QE (Parallel Data Output) - Output
  11. QD (Parallel Data Output) - Output
  12. QC (Parallel Data Output) - Output
  13. QB (Parallel Data Output) - Output
  14. QA (Parallel Data Output) - Output
  15. CLR (Clear) - Input
  16. VCC (Supply Voltage) - Power Supply
  17. OE (Output Enable) - Input
  18. MR (Master Reset) - Input
  19. QH (Serial Data Output) - Output
  20. QH' (Serial Data Output) - Output

Functional Features

  • High-speed serial-to-parallel and parallel-to-serial conversion
  • Parallel data can be loaded asynchronously or synchronously
  • Clear function to reset the register
  • Output enable/disable control for easy interfacing with other devices
  • CMOS/TTL compatible input voltage levels
  • CMOS output voltage levels for compatibility with various logic families

Advantages

  • Fast data transfer rate of up to 74 Mbps
  • Versatile functionality for data storage and transfer applications
  • Wide operating temperature range for diverse environments
  • Compact package size for space-constrained designs
  • Easy integration with other components due to standard pin configuration

Disadvantages

  • Limited number of flip-flops (8) may not be sufficient for certain applications requiring larger data storage capacity
  • Requires external clock signal for proper operation

Working Principles

The CD74HC299ME4 is a shift register with parallel load and asynchronous clear functionality. It allows for high-speed conversion between serial and parallel data formats. The device operates by shifting in serial data through the DS (Serial Data Input) pin and converting it into parallel data at the QA-QH (Parallel Data Output) pins. The parallel data can be loaded asynchronously using the PL (Parallel Load) input or synchronously using the CP (Clock Pulse) input. The CLR (Clear) input resets the register to its initial state.

Detailed Application Field Plans

The CD74HC299ME4 can be used in various applications that require data storage and transfer, such as:

  1. Serial-to-Parallel Conversion: Converting serial data from sensors or communication interfaces into parallel format for further processing.
  2. Parallel-to-Serial Conversion: Converting parallel data from memory or other sources into serial format for transmission over limited bandwidth channels.
  3. Data Logging: Storing data from multiple sources in parallel format for later analysis or retrieval.
  4. Serial Communication Interfaces: Interfacing with serial communication protocols by converting parallel data to serial format and vice versa.

Detailed and Complete Alternative Models

  1. SN74HC299N: Similar shift register IC with parallel load and asynchronous clear, offered in DIP (Dual Inline Package) package.
  2. CD74HCT299E: Shift register IC with similar functionality but operates at a lower voltage range of 4.5V to 5.5V.
  3. MC74HC299DW: High-speed shift register IC with parallel load and synchronous clear, available in SOIC package.

(Note: These alternative models are provided as examples and may have slight variations in specifications and pin configuration. It is recommended to refer to the respective datasheets for detailed information.)

Word count: 561 words

Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von CD74HC299ME4 in technischen Lösungen auf

Sure! Here are 10 common questions and answers related to the application of CD74HC299ME4 in technical solutions:

  1. Q: What is CD74HC299ME4? A: CD74HC299ME4 is a high-speed CMOS 8-bit universal shift/storage register with 3-state outputs.

  2. Q: What are the key features of CD74HC299ME4? A: The key features include parallel-to-serial or serial-to-parallel data conversion, 3-state outputs, and high-speed operation.

  3. Q: How can CD74HC299ME4 be used in technical solutions? A: It can be used for various applications such as data storage, data transfer, serial communication, and parallel-to-serial/serial-to-parallel conversion.

  4. Q: What is the operating voltage range of CD74HC299ME4? A: CD74HC299ME4 operates within a voltage range of 2V to 6V.

  5. Q: What is the maximum clock frequency supported by CD74HC299ME4? A: CD74HC299ME4 supports a maximum clock frequency of 74 MHz.

  6. Q: Can CD74HC299ME4 handle both synchronous and asynchronous inputs? A: Yes, CD74HC299ME4 can handle both synchronous and asynchronous inputs.

  7. Q: Does CD74HC299ME4 have any built-in protection features? A: Yes, it has built-in protection against electrostatic discharge (ESD) and excessive power dissipation.

  8. Q: What is the output drive capability of CD74HC299ME4? A: CD74HC299ME4 has a typical output drive capability of ±6 mA.

  9. Q: Can CD74HC299ME4 be cascaded to increase the number of bits? A: Yes, multiple CD74HC299ME4 devices can be cascaded to increase the number of bits in the shift register.

  10. Q: What is the package type of CD74HC299ME4? A: CD74HC299ME4 is available in a 20-pin SOIC (Small Outline Integrated Circuit) package.

Please note that these answers are general and may vary depending on the specific application and requirements.