SN74AHC594N

Product Overview

• Category: Integrated Circuit
• Use: Shift Register
• Characteristics: High-speed, low-power consumption
• Package: DIP (Dual In-line Package)
• Essence: Serial-in, parallel-out shift register
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100 MHz
• Number of Stages: 8

Detailed Pin Configuration

1. SER (Serial Data Input)
2. SRCLK (Shift Register Clock Input)
3. RCLK (Register Clock Input)
4. OE (Output Enable Input)
5. QH' (Serial Output)
6. QA-QH (Parallel Outputs)
7. GND (Ground)
8. VCC (Supply Voltage)

Functional Features

• Serial-in, parallel-out operation
• High-speed data transfer
• Low power consumption
• Wide supply voltage range
• Output enable control for easy cascading
• Schmitt-trigger inputs for noise immunity

Advantages and Disadvantages

Advantages

• High-speed operation allows for quick data transfer.
• Low power consumption makes it suitable for battery-powered devices.
• Wide supply voltage range provides flexibility in various applications.
• Output enable control simplifies cascading multiple shift registers.
• Schmitt-trigger inputs ensure reliable operation in noisy environments.

Disadvantages

• Limited number of stages (8) may not be sufficient for complex applications.
• DIP package may not be suitable for space-constrained designs.
• Lack of built-in error detection or correction mechanisms.

Working Principles

The SN74AHC594N is a serial-in, parallel-out shift register. It receives data serially through the SER pin and shifts it into internal storage registers on each rising edge of the SRCLK input. The RCLK input latches the stored data into the output registers, making it available at the parallel outputs (QA-QH). The QH' pin provides the serial output for cascading multiple shift registers.

Detailed Application Field Plans

The SN74AHC594N is commonly used in various applications, including:

1. LED Matrix Displays: The shift register's parallel outputs can drive individual LEDs in a matrix arrangement, enabling control of multiple LEDs with fewer microcontroller pins.
2. Serial-to-Parallel Conversion: It can be used to convert serial data from sensors or communication interfaces into parallel data for further processing.
3. Data Storage and Transfer: The shift register can store and transfer data in applications such as data loggers, digital clocks, and communication protocols.
4. Address Decoding: It can be utilized in address decoding circuits to select specific memory locations or peripheral devices.

Detailed and Complete Alternative Models

1. 74HC595: Similar to SN74AHC594N but operates at a higher voltage range (2 V to 6 V).
2. CD4094: A similar shift register with additional features like latch enable and asynchronous reset.
3. 74LS164: Low-power Schottky TTL version of a serial-in, parallel-out shift register.

These alternative models offer similar functionality and can be considered based on specific requirements and compatibility with existing designs.

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