SN74HC623DWR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic Level Shifter
• Characteristics: High-Speed, Non-Inverting, 3-State Output
• Package: SOIC-20 Wide
• Essence: This IC is designed to shift logic levels between different voltage domains in digital systems.
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 80MHz
• Number of Channels: 8
• Output Current: ±6mA
• Propagation Delay Time: 10ns
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The SN74HC623DWR has a total of 20 pins. The pin configuration is as follows:

1. A1
2. B1
3. GND
4. A2
5. B2
6. OE#
7. Y1
8. Y2
9. GND
10. A3
11. B3
12. GND
13. A4
14. B4
15. VCC
16. A5
17. B5
18. Y3
19. Y4
20. GND

Functional Features

• Non-inverting level shifting: The IC provides non-inverting level shifting between two voltage domains, allowing seamless communication between different logic families.
• 3-state output: The outputs can be put into a high-impedance state, enabling multiple devices to share the same bus without interference.
• High-speed operation: With a maximum operating frequency of 80MHz, the IC ensures fast and efficient data transmission.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Non-inverting level shifting simplifies interfacing between different logic families. - 3-state output enables bus sharing and reduces the number of required pins.

Disadvantages: - Limited output current may restrict its use in high-current applications. - Propagation delay time may introduce timing issues in certain scenarios.

Working Principles

The SN74HC623DWR operates by receiving input signals from one voltage domain and shifting them to another voltage domain. It utilizes a combination of logic gates and transistors to achieve non-inverting level shifting. The 3-state output feature allows the IC to disconnect from the bus when not actively transmitting data, preventing signal conflicts.

Detailed Application Field Plans

The SN74HC623DWR is commonly used in digital systems where logic level shifting is required. Some specific application fields include:

1. Microcontroller interfacing: The IC can be used to interface microcontrollers operating at different voltage levels, enabling communication between them.
2. Communication protocols: It is suitable for level shifting in various communication protocols such as I2C, SPI, and UART.
3. Mixed-voltage systems: The IC facilitates communication between different voltage domains in mixed-voltage systems, ensuring proper signal integrity.

Alternative Models

Here are some alternative models that provide similar functionality:

1. CD4504BE
2. 74HCT623N
3. MC74HC623AN
4. SN74LVC4245APW

These alternatives can be considered based on specific requirements and availability.

In conclusion, the SN74HC623DWR is a versatile integrated circuit that enables non-inverting level shifting between different voltage domains. Its high-speed operation, 3-state output, and wide supply voltage range make it suitable for various digital systems. However, limitations in output current and propagation delay time should be considered when selecting this IC for specific applications.