CD74HCT259MT

Product Overview

• Category: Integrated Circuit
• Use: Data Storage and Control
• Characteristics: High-Speed, CMOS Logic, 8-Bit Addressable Latch
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: A versatile latch used for data storage and control in various electronic systems.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 3.15V (min), 6V (max)
• Low-Level Input Voltage: -0.5V (min), 1.5V (max)
• High-Level Output Voltage: 4.4V (min), VCC (max)
• Low-Level Output Voltage: 0V (min), 0.55V (max)
• Maximum Operating Frequency: 50MHz

Detailed Pin Configuration

The CD74HCT259MT has a total of 16 pins, each serving a specific function:

1. GND: Ground
2. QA: Output A
3. QB: Output B
4. QC: Output C
5. QD: Output D
6. QE: Output E
7. QF: Output F
8. QG: Output G
9. QH: Output H
10. MR: Master Reset
11. SH/LD: Shift/Load
12. CLK: Clock
13. A: Address Input A
14. B: Address Input B
15. C: Address Input C
16. VCC: Power Supply

Functional Features

• 8-bit addressable latch with parallel input and output capability.
• Can be used as a shift register or storage register depending on the mode selected.
• Supports both serial and parallel data transfer.
• High-speed operation with minimal power consumption.
• CMOS logic ensures compatibility with a wide range of devices.

Advantages and Disadvantages

Advantages: - Versatile functionality allows for various applications. - High-speed operation enables efficient data processing. - Low power consumption enhances energy efficiency. - CMOS logic ensures compatibility with different systems.

Disadvantages: - Limited maximum operating frequency compared to some alternative models. - TSSOP package may require additional care during soldering.

Working Principles

The CD74HCT259MT operates based on the principles of latch-based data storage and control. It consists of eight D-type flip-flops that can store data in parallel. The shift/load input determines whether the device functions as a shift register or a storage register. When in shift mode, data is shifted through the flip-flops sequentially. In load mode, data is loaded into the flip-flops simultaneously. The clock input controls the timing of these operations.

Detailed Application Field Plans

The CD74HCT259MT finds applications in various electronic systems, including but not limited to:

1. Address Decoding: Used to decode address signals in microprocessors and memory systems.
2. Data Multiplexing: Enables the selection and routing of data from multiple sources to a single output.
3. Register Storage: Stores temporary data in microcontrollers and digital signal processors.
4. Parallel-to-Serial Conversion: Converts parallel data to serial format for transmission over communication channels.
5. Control Logic: Implements control functions in complex digital systems.

Detailed and Complete Alternative Models

1. SN74HC259N: Similar 8-bit addressable latch with parallel input/output capability. DIP package.
2. CD4014BE: 8-bit static shift register with parallel input/output capability. DIP package.
3. 74HC595: 8-bit serial-in, serial/parallel-out shift register. SOIC package.

These alternative models offer similar functionality and can be considered based on specific requirements and system constraints.

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