Encyclopedia Entry: 74AHCT595PW,112

Product Overview

Category

The 74AHCT595PW,112 belongs to the category of integrated circuits (ICs) and specifically falls under the family of shift registers.

Use

This product is primarily used for serial-to-parallel data conversion in various electronic applications. It allows for efficient control and manipulation of multiple output pins using a minimal number of input pins.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Schmitt-trigger action on all inputs
• Output capability: 6 mA at 4.5 V
• Package type: TSSOP (Thin Shrink Small Outline Package)
• RoHS compliant

Package and Quantity

The 74AHCT595PW,112 is available in a TSSOP package. Each package contains one unit of the IC.

Specifications

• Supply voltage range: 4.5 V to 5.5 V
• Operating temperature range: -40°C to +125°C
• Input voltage range: 0 V to VCC
• Output voltage range: 0 V to VCC
• Maximum clock frequency: 100 MHz
• Number of bits: 8
• Serial data input: DSI
• Serial data output: QH'
• Parallel data outputs: QA-QH
• Clock input: CP
• Master reset input: MR

Pin Configuration

The pin configuration of the 74AHCT595PW,112 is as follows:

+----U----+ QA --|1 20|-- VCC QB --|2 19|-- QH' QC --|3 18|-- GND QD --|4 17|-- DS0 QE --|5 16|-- DS1 QF --|6 15|-- DS2 QG --|7 14|-- DS3 QH --|8 13|-- CP GND --|9 12|-- MR DSI --|10 11|-- OE' +---------+

Functional Features

The 74AHCT595PW,112 offers the following functional features:

1. Serial-to-parallel data conversion: It allows for efficient conversion of serial input data into parallel output data.
2. Cascading capability: Multiple shift registers can be cascaded together to expand the number of output pins.
3. Schmitt-trigger action: The IC incorporates Schmitt-trigger inputs, ensuring reliable and noise-tolerant operation.
4. Output control: The output enable (OE') pin enables or disables the outputs, providing flexibility in controlling the data flow.

Advantages and Disadvantages

Advantages

• High-speed operation allows for quick data processing.
• Low power consumption makes it suitable for battery-powered devices.
• Wide operating voltage range provides compatibility with various systems.
• Schmitt-trigger action ensures reliable operation even in noisy environments.

Disadvantages

• Limited number of output pins (8 in this case) may restrict certain applications requiring a higher number of outputs.
• Lack of built-in protection features against electrical faults or ESD events.

Working Principles

The 74AHCT595PW,112 operates based on the principle of shifting data through its internal register. The serial input data is shifted in synchronously with the clock signal (CP). On each clock pulse, the current value in the register is shifted to the next stage, while the new input data enters the first stage. The parallel output data is available at the output pins (QA-QH) after the desired number of clock pulses.

Application Field Plans

The 74AHCT595PW,112 finds applications in various fields, including:

1. LED matrix control: It can be used to control multiple LEDs in a matrix arrangement, enabling dynamic patterns and animations.
2. Digital displays: The IC can drive segment displays, allowing for the creation of numeric or alphanumeric displays.
3. Data multiplexing: It enables efficient data multiplexing in communication systems, reducing the number of required input/output pins.
4. Shift register-based counters: The IC can be utilized as a building block for designing counters with parallel output capability.

Alternative Models

Several alternative models are available that offer similar functionality to the 74AHCT595PW,112. Some notable alternatives include:

• SN74HC595N
• CD74HC595E
• 74LS595

These models have comparable specifications and pin configurations, providing flexibility in choosing the most suitable option for specific applications.

In conclusion, the 74AHCT595PW,112 is a versatile shift register IC that offers high-speed operation, low power consumption, and reliable data manipulation capabilities. Its compact package and wide range of applications make it a popular choice among electronic