CD74HCT4094E

Product Overview

• Category: Integrated Circuit (IC)
• Use: Shift Register
• Characteristics: High-Speed, CMOS Logic, 8-Bit Serial-In/Parallel-Out
• Package: 16-Pin DIP (Dual In-Line Package)
• Essence: The CD74HCT4094E is a high-speed CMOS logic IC that functions as an 8-bit serial-in/parallel-out shift register. It is commonly used in digital electronics for applications such as data storage, LED control, and address decoding.
• Packaging/Quantity: The CD74HCT4094E is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HCT
• Number of Bits: 8
• Clock Frequency: Up to 25 MHz
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±6 mA
• Propagation Delay: 15 ns (max)

Pin Configuration

The CD74HCT4094E has a total of 16 pins. Here is the detailed pin configuration:

1. Q0 (Output)
2. Q1 (Output)
3. Q2 (Output)
4. Q3 (Output)
5. Q4 (Output)
6. Q5 (Output)
7. Q6 (Output)
8. Q7 (Output)
9. GND (Ground)
10. SER (Serial Data Input)
11. SRCLK (Shift Register Clock Input)
12. RCLK (Register Clock Input)
13. OE (Output Enable)
14. SRCLR (Shift Register Clear Input)
15. QAUX (Auxiliary Output)
16. VCC (Power Supply)

Functional Features

• Serial-In/Parallel-Out: The CD74HCT4094E allows data to be serially shifted in and then parallelly outputted.
• Cascade Capability: Multiple CD74HCT4094E ICs can be cascaded together to increase the number of output bits.
• Output Enable Control: The OE pin enables or disables the outputs, providing flexibility in controlling the timing of data output.
• Shift Register Clear: The SRCLR pin clears the shift register, allowing for a fresh start.

Advantages and Disadvantages

Advantages: - High-speed operation - CMOS logic provides low power consumption - Easy integration with other digital circuits - Cascade capability allows for scalability

Disadvantages: - Limited number of output bits (8) - Requires external clock signals for proper operation - Not suitable for applications requiring higher bit resolutions

Working Principles

The CD74HCT4094E operates based on the principles of shift registers. It receives serial data through the SER pin and shifts it into its internal storage register upon each rising edge of the SRCLK input. The RCLK input is used to latch the stored data into the output register, which can then be accessed in parallel through the Q0-Q7 pins. The OE pin controls the output enable function, while the SRCLR pin clears the shift register when activated.

Detailed Application Field Plans

The CD74HCT4094E finds applications in various fields, including:

1. LED Control: The shift register functionality allows for efficient control of multiple LEDs using fewer microcontroller pins.
2. Data Storage: It can be used as a temporary storage device for data buffering or as part of a larger memory system.
3. Address Decoding: The CD74HCT4094E can be employed in address decoding circuits to select specific devices or memory locations.
4. Serial-to-Parallel Conversion: It enables the conversion of serial data streams into parallel data for further processing.

Detailed and Complete Alternative Models

1. 74HC4094: Similar to CD74HCT4094E, but operates at a wider voltage range (2V to 6V) and has a higher clock frequency capability.
2. SN74HC595: A popular alternative with similar functionality, but offers a higher number of output bits (8-bit shift register with storage register).

These alternative models can be considered based on specific project requirements and compatibility with existing circuitry.

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