Encyclopedia Entry: 74VHCT573AFT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic Level Shifter and Latch
• Characteristics: High-Speed, Low-Power, Octal D-Type Transparent Latch
• Package: TSSOP-20
• Essence: The 74VHCT573AFT is a versatile integrated circuit that combines level shifting and latching functionalities. It is commonly used in digital systems to interface between devices operating at different voltage levels.
• Packaging/Quantity: The 74VHCT573AFT is typically sold in reels or tubes containing 250 units.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range (High Level): 2.0V to VCC
• Input Voltage Range (Low Level): GND to 0.8V
• Output Voltage Range (High Level): 2.0V to VCC
• Output Voltage Range (Low Level): GND to 0.4V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6 ns (typical)
• Latch-Up Performance: ±300mA

Detailed Pin Configuration

The 74VHCT573AFT has a total of 20 pins, which are assigned specific functions as follows:

1. GND: Ground reference
2. D0: Data input 0
3. D1: Data input 1
4. D2: Data input 2
5. D3: Data input 3
6. D4: Data input 4
7. D5: Data input 5
8. D6: Data input 6
9. D7: Data input 7
10. OE: Output enable
11. LE: Latch enable
12. Q0: Output 0
13. Q1: Output 1
14. Q2: Output 2
15. Q3: Output 3
16. Q4: Output 4
17. Q5: Output 5
18. Q6: Output 6
19. Q7: Output 7
20. VCC: Supply voltage

Functional Features

• Level Shifting: The 74VHCT573AFT can shift the logic levels of its inputs to match the desired output voltage level, allowing seamless communication between devices operating at different voltage levels.
• Transparent Latching: The latch enable (LE) signal controls the transparent latching feature, which allows the data inputs to be transferred to the outputs when enabled.
• Output Enable: The output enable (OE) signal enables or disables the outputs, providing control over when the outputs are active.

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide supply voltage range - Compact TSSOP package for space-saving designs - Easy integration into digital systems

Disadvantages: - Limited number of latch outputs (8 in total) - Not suitable for applications requiring a large number of latches

Working Principles

The 74VHCT573AFT operates by receiving data inputs (D0-D7) and a latch enable (LE) signal. When the latch enable is high, the data inputs are transferred to the outputs (Q0-Q7). The output enable (OE) signal controls the activation of the outputs. The IC also performs level shifting to ensure compatibility between different voltage domains.

Detailed Application Field Plans

The 74VHCT573AFT finds applications in various digital systems, including: 1. Microcontrollers and microprocessors 2. Communication systems 3. Data acquisition systems 4. Industrial automation 5. Consumer electronics

Detailed and Complete Alternative Models

• 74HC573: Similar functionality but operates at a higher voltage range (2V to 6V).
• 74LS573: Compatible with TTL logic levels but consumes more power.
• SN74LVTH573: Offers lower voltage operation and higher speed.

Note: This is not an exhaustive list of alternative models, but it provides a few examples.

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