CD74HC194PWT

Product Overview

• Category: Integrated Circuit
• Use: Shift Register
• Characteristics: High-Speed, CMOS Logic, 4-Bit Parallel-In/Serial-Out
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The CD74HC194PWT is a high-speed CMOS logic integrated circuit that functions as a 4-bit parallel-in/serial-out shift register.
• Packaging/Quantity: The CD74HC194PWT is typically sold in reels or tubes and comes in quantities of 250 or 3000 units per package.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Bits: 4
• Clock Frequency: Up to 25 MHz
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±6mA
• Propagation Delay: 14 ns (typical)

Pin Configuration

The CD74HC194PWT has a total of 16 pins. The pin configuration is as follows:

1. SER (Serial Data Input)
2. QA (Parallel Output A)
3. QB (Parallel Output B)
4. QC (Parallel Output C)
5. QD (Parallel Output D)
6. GND (Ground)
7. CP (Clock Pulse Input)
8. MR (Master Reset Input)
9. QA (Parallel Output A)
10. QB (Parallel Output B)
11. QC (Parallel Output C)
12. QD (Parallel Output D)
13. VCC (Positive Supply Voltage)
14. QA (Parallel Output A)
15. QB (Parallel Output B)
16. QC (Parallel Output C)

Functional Features

• 4-bit parallel-in/serial-out shift register
• High-speed operation with a clock frequency of up to 25 MHz
• CMOS logic for low power consumption
• Master reset input for clearing the register
• Serial data input for shifting in new data
• Parallel outputs for reading the stored data

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick data transfer - Low power consumption due to CMOS technology - Compact TSSOP package for space-saving designs - Easy integration into digital circuits

Disadvantages: - Limited number of bits (4) may not be sufficient for certain applications - Propagation delay of 14 ns may introduce timing issues in high-frequency systems

Working Principles

The CD74HC194PWT is a 4-bit parallel-in/serial-out shift register. It can store and shift data in a serial manner. The parallel inputs (QA, QB, QC, QD) allow for loading data into the register. The clock pulse input (CP) controls the shifting of data from the parallel inputs to the serial output (SER). The master reset input (MR) clears the register, setting all outputs to a low state.

Detailed Application Field Plans

The CD74HC194PWT can be used in various applications that require serial data storage and shifting. Some potential application fields include:

1. Data communication systems
2. Serial-to-parallel conversion
3. LED matrix control
4. Digital displays
5. Industrial automation

Alternative Models

Here are some alternative models that provide similar functionality to the CD74HC194PWT:

1. SN74HC194N - DIP (Dual In-line Package) version of the same IC
2. CD4015BE - Dual 4-bit static shift register
3. 74HC595 - 8-bit serial-in/parallel-out shift register

These alternative models can be considered based on specific project requirements and availability.

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