Encyclopedia Entry: 74VHC595D,118

Product Overview

Category

The 74VHC595D,118 belongs to the category of integrated circuits (ICs) and specifically falls under the family of shift registers.

Use

This IC is commonly used for serial-in, parallel-out data shifting applications. It allows for efficient control of multiple outputs using a minimal number of pins on a microcontroller or other digital devices.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with both CMOS and TTL logic levels

Package

The 74VHC595D,118 is available in a standard SOIC (Small Outline Integrated Circuit) package. This package offers ease of handling and compatibility with automated assembly processes.

Essence

The essence of the 74VHC595D,118 lies in its ability to convert serial data into parallel output, making it an essential component in various digital systems and applications.

Packaging/Quantity

The 74VHC595D,118 is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier or manufacturer.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Clock Frequency: 100 MHz
• Number of Shift Register Stages: 8
• Output Current: ±6mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The 74VHC595D,118 has a total of 16 pins, each serving a specific function:

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

Functional Features

Serial-In, Parallel-Out Shifting

The 74VHC595D,118 allows for serial data input through the SER pin and shifts it into an internal shift register. The parallel output is then available on the QA-QH pins, which can be controlled individually.

Cascading Capability

Multiple 74VHC595D,118 ICs can be cascaded together to expand the number of outputs without requiring additional microcontroller pins. This makes it ideal for applications that require control of a large number of devices or LEDs.

Output Enable and Clear Functionality

The OE pin enables or disables the output stage, allowing for easy control of the output signals. The SRCLR pin clears the shift register, resetting all outputs to a known state.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data shifting.
• Low power consumption makes it suitable for battery-powered devices.
• Wide operating voltage range provides flexibility in various applications.
• Compatibility with both CMOS and TTL logic levels ensures versatility.

Disadvantages

• Limited number of shift register stages (8 in this case) may not be sufficient for certain complex applications.
• Lack of built-in latching functionality requires external circuitry for storage of shifted data.

Working Principles

The 74VHC595D,118 operates based on the principle of serial-in, parallel-out shifting. When clocked, the serial data input (SER) is shifted into the internal shift register. The shift register stages are connected in series, allowing the data to propagate from one stage to the next.

Upon reaching the last stage, the parallel output becomes available on the QA-QH pins. The output can be controlled individually by providing appropriate clock signals to the shift register clock (SRCLK) and register clock (RCLK) inputs.

Detailed Application Field Plans

The 74VHC595D,118 finds applications in various fields, including but not limited to:

1. LED Matrix Displays: Controlling multiple LEDs efficiently using a minimal number of microcontroller pins.
2. Serial-to-Parallel Conversion: Converting serial data streams into parallel outputs for interfacing with other digital devices.
3. Data Multiplexing: Efficiently routing data from multiple sources to different destinations.
4. Shift Register Chains: Cascading multiple ICs to control a large number of devices or LEDs.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74VHC595D,118 include:

1. 74HC595: A CMOS version of the IC with similar characteristics and pin configuration.
2. SN74HC595: A popular Texas Instruments variant of the shift register IC.
3. CD4094: A different shift register IC with additional latching functionality.

These alternative models can be considered based on