CD74HC194M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Shift Register
• Characteristics: High-Speed, CMOS Logic, 4-Bit Parallel-Access Shift Register
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HC194M is a versatile shift register IC that allows parallel loading and serial shifting of data. It is commonly used in digital circuits for applications such as data storage, data transfer, and control signal generation.
• Packaging/Quantity: The CD74HC194M is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC (High-Speed CMOS)
• Number of Bits: 4
• Clock Frequency: Up to 25 MHz
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±5mA
• Propagation Delay: 13 ns (typical)

Pin Configuration

The CD74HC194M has a total of 16 pins, which are assigned specific functions:

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. MR (Master Reset)
7. CP (Clock Pulse Input)
8. DS (Serial Data Input)
9. OE (Output Enable)
10. GND (Ground)
11. QD (Parallel Output D)
12. QC (Parallel Output C)
13. QB (Parallel Output B)
14. QA (Parallel Output A)
15. VCC (Positive Power Supply)
16. SH/LD (Shift/Load Control Input)

Functional Features

• Parallel Loading: The CD74HC194M allows data to be loaded in parallel through the QA, QB, QC, and QD inputs.
• Serial Shifting: The shift register can shift data serially from QA to QB, QB to QC, and QC to QD outputs.
• Master Reset: The MR input resets the shift register to its initial state.
• Output Enable: The OE input enables or disables the outputs.
• Shift/Load Control: The SH/LD input determines whether the shift register is in shift mode or load mode.

Advantages and Disadvantages

Advantages: - High-speed operation - Wide operating voltage range - Low power consumption - Compact package size

Disadvantages: - Limited number of bits (4-bit) - Requires external clock signal for shifting

Working Principles

The CD74HC194M operates based on the principles of sequential logic. It consists of flip-flops that store and transfer data. When in parallel loading mode, the data is loaded into the flip-flops through the parallel inputs. In serial shifting mode, the data is shifted from one flip-flop to another upon receiving clock pulses. The shift register can be reset to its initial state using the master reset input.

Detailed Application Field Plans

The CD74HC194M finds applications in various digital systems, including but not limited to: - Data storage and retrieval systems - Serial-to-parallel and parallel-to-serial data conversion - Shift register-based counters and timers - Control signal generation and manipulation circuits - Data transfer between different sections of a digital system

Alternative Models

Here are some alternative models that offer similar functionality to the CD74HC194M: - SN74HC194N - 74HC194D - MC74HC194AN - CD4015BE

These alternatives may have slight variations in specifications, pin configuration, or package type. It is recommended to refer to their respective datasheets for detailed information.

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