MAX722CSE

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Display Driver
• Characteristics: Serially Interfaced, 8-Digit LED Display Support, Multiplexing Capability, Low Power Consumption
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: MAX722CSE is a versatile LED display driver IC that allows easy control and multiplexing of up to 8 digits of 7-segment LED displays.
• Packaging/Quantity: The MAX722CSE is available in a standard SOIC package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 4.0V to 5.5V
• Maximum Output Current per Segment: 40mA
• Maximum Output Current per Digit: 80mA
• Serial Interface: SPI (Serial Peripheral Interface)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX722CSE has a total of 16 pins arranged as follows:

1. DIN (Data Input)
2. CS (Chip Select)
3. CLK (Clock)
4. GND (Ground)
5. DIG0 (Digit 0)
6. DIG1 (Digit 1)
7. DIG2 (Digit 2)
8. DIG3 (Digit 3)
9. DIG4 (Digit 4)
10. DIG5 (Digit 5)
11. DIG6 (Digit 6)
12. DIG7 (Digit 7)
13. V+ (Positive Supply Voltage)
14. ISET (Current Set)
15. BLANK (Blanking Control)
16. V- (Negative Supply Voltage)

Functional Features

• Easy control of multiple 7-segment LED displays through a serial interface.
• Supports multiplexing of up to 8 digits, reducing the number of required pins.
• Provides a constant-current drive for each LED segment, ensuring uniform brightness.
• Built-in decoding circuitry simplifies the display of numeric characters.
• Allows individual control of each digit, segment, and decimal point.

Advantages

• Simplifies the design and control of LED displays, reducing overall system complexity.
• Low power consumption, making it suitable for battery-powered applications.
• Serial interface allows easy integration with microcontrollers and other digital devices.
• Multiplexing capability reduces the number of required I/O pins.

Disadvantages

• Limited to driving 7-segment LED displays, not suitable for other types of displays.
• Requires an external current-limiting resistor for each LED segment.
• May require additional components for voltage regulation and protection.

Working Principles

The MAX722CSE operates by receiving data serially through the DIN pin. The received data is then decoded and used to control the segments and digits of the connected LED display. The IC uses multiplexing techniques to cycle through each digit, illuminating the desired segments at the appropriate time. The BLANK pin can be used to turn off all segments simultaneously.

Application Field Plans

The MAX722CSE is commonly used in various applications that require the control of multiple 7-segment LED displays. Some typical application fields include:

1. Digital clocks and timers
2. Scoreboards and counters
3. Instrumentation panels
4. Industrial control systems
5. Advertising displays

Alternative Models

• MAX7219: Similar functionality but with a larger package and higher maximum output current.
• HT16K33: Offers compatibility with different types of LED displays and additional features like key scanning.

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