# M54/M74HC298 Datasheet Summary

This document is a datasheet for the SGS-THOMSON (now STMicroelectronics) M54/M74HC298, a high-speed CMOS 8-bit shift register. Here's a breakdown of the key information contained within the document:

## 1. General Description

️· Function: The M54/M74HC298 is an 8-bit shift register with parallel inputs and serial output. It's used for data storage and serial data transfer.
️· Technology: It's based on high-speed CMOS technology.
️· Logic Family: Part of the HC series (High-speed CMOS).

## 2. Key Features & Performance

️· Operating Voltage: Typically operates from a supply voltage range of 2V to 6V.
️· Input Logic Levels: CMOS input logic levels.
️· Switching Characteristics: The datasheet provides detailed timing diagrams and specifications for parameters like:
- Propagation delay
- Set-up time
- Hold time
- Pulse width
- Maximum clock frequency
️· Power Dissipation: Specifies typical and maximum power consumption.
️· Input Capacitance: Details the input capacitance of the device.

## 3. Pinout and Functional Description

️· Pin Configuration: The datasheet shows the pin assignments for the device, identifying each pin's function (e.g., clock, data inputs, parallel data inputs, serial output, ground, Vcc).
️· Functional Diagram: A block diagram illustrates the internal architecture of the shift register.
️· Truth Table: Provides a table defining the operation of the device based on the input signals.

## 4. Package Information

️· Available Packages: The datasheet details multiple package options, including:
- Plastic DIP (Dual In-line Package)
- Ceramic DIP
- SOIC (Small Outline Integrated Circuit)
- PLCC (Plastic Leaded Chip Carrier)
️· Mechanical Dimensions: Detailed mechanical drawings and dimensions are provided for each package type, including pin lengths, package body size, and pitch.

## 5. Electrical Characteristics

️· DC Parameters: Specifies the DC electrical characteristics of the device, such as minimum and maximum input high and low voltages, output high and low voltages, and leakage currents.
️· AC Parameters: Defines the AC electrical characteristics, including propagation delays, rise and fall times, and operating frequencies.

## 6. Additional Information

️· Test Conditions: Describes the test conditions used to measure the electrical parameters.
️· Disclaimer: Contains legal disclaimers regarding the use of the information and the responsibility of the manufacturer.

In essence, this datasheet provides all the necessary technical information for engineers and designers to use the M54/M74HC298 in their electronic circuits and systems.