MAX6921AUI+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Display Driver
• Characteristics: High voltage, Serially Interfaced, 16-Digit, Multiplexed LED Display Driver
• Package: 28-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Efficiently drives and controls LED displays with minimal external components
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Maximum Output Current: 80mA
• Maximum Segment Current: 40mA
• Maximum Common Anode Voltage: 36V
• Maximum Common Cathode Voltage: -14V
• Serial Interface: SPI-Compatible, 4-Wire
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6921AUI+T has a total of 28 pins. The pin configuration is as follows:

1. VDD - Positive Power Supply
2. GND - Ground
3. DIN - Serial Data Input
4. SCLK - Serial Clock Input
5. LOAD - Load Input
6. BLANK - Blank Input
7. DIG0 - Digit 0 Output
8. DIG1 - Digit 1 Output
9. DIG2 - Digit 2 Output
10. DIG3 - Digit 3 Output
11. DIG4 - Digit 4 Output
12. DIG5 - Digit 5 Output
13. DIG6 - Digit 6 Output
14. DIG7 - Digit 7 Output
15. DIG8 - Digit 8 Output
16. DIG9 - Digit 9 Output
17. DIG10 - Digit 10 Output
18. DIG11 - Digit 11 Output
19. DIG12 - Digit 12 Output
20. DIG13 - Digit 13 Output
21. DIG14 - Digit 14 Output
22. DIG15 - Digit 15 Output
23. SEG0 - Segment 0 Output
24. SEG1 - Segment 1 Output
25. SEG2 - Segment 2 Output
26. SEG3 - Segment 3 Output
27. SEG4 - Segment 4 Output
28. SEG5 - Segment 5 Output

Functional Features

• Drives up to 16 digits with 128 segments
• Provides multiplexed LED display control
• Supports both common anode and common cathode displays
• Allows individual segment control for each digit
• Offers programmable blanking and intensity control
• Provides serial interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages: - High voltage capability allows driving of multiple LEDs in series - Serial interface simplifies communication with microcontrollers - Multiplexing reduces the number of required pins - Programmable features offer flexibility in display control

Disadvantages: - Limited to driving LED displays only - Requires external components for power regulation and protection

Working Principles

The MAX6921AUI+T is a LED display driver IC that utilizes a serial interface to receive data from a microcontroller. It generates the necessary signals to drive LED displays, allowing control over individual segments and digits. The IC supports multiplexing, which enables the control of multiple digits using fewer pins.

By providing a high voltage output, the MAX6921AUI+T can drive multiple LEDs in series, reducing the need for external components. It also offers programmable features such as blanking and intensity control, allowing customization of the display behavior.

Detailed Application Field Plans

The MAX6921AUI+T is commonly used in various applications that require LED display control. Some of the potential application fields include:

1. Digital clocks and timers
2. Instrumentation panels
3. Scoreboards and signage
4. Industrial control systems
5. Consumer electronics devices

Detailed and Complete Alternative Models

• MAX7219CNG+: Similar LED display driver IC with 8-digit control and cascading capability.
• TLC5940NT: LED driver IC with 16-channel control and grayscale PWM (Pulse Width Modulation) support.
• HT16K33: Integrated LED controller and driver IC with I2C interface and keyscan function.

These alternative models offer similar functionality to the MAX6921AUI+T and can be considered as alternatives based on specific requirements and design constraints.

In conclusion, the MAX6921AUI+T is a high voltage LED display driver IC that provides efficient control over multiple digits and segments. Its serial interface and programmable features make it suitable for various applications in need of LED display control.