Serially Interfaced / 8-Digit LED Display Drivers The MAX7219CNG is a compact, serial input/output common-cathode display driver from Maxim Integrated (now part of Analog Devices). Below are the factual details about its specifications, descriptions, and features:
### **Manufacturer:**
- **MAX** (Maxim Integrated, now Analog Devices)
### **Specifications:**
1. **Type:** LED Display Driver (Common-Cathode)
2. **Interface:** Serial (SPI-compatible)
3. **Supply Voltage (V+):** 4.0V to 5.5V
4. **Logic Input Voltage (VIN):** -0.5V to +7V
5. **Maximum Output Current per Segment:** 100mA
6. **Maximum Continuous Current per Digit:** 320mA
7. **Maximum Power Dissipation:** 1.1W
8. **Operating Temperature Range:** 0°C to +70°C
9. **Package:** 24-Pin DIP (Dual In-Line Package)
10. **Number of Digits Driven:** Up to 8 digits (or 64 individual LEDs)
11. **Data Transfer Rate:** Up to 10MHz
### **Descriptions:**
- The MAX7219CNG is designed to drive 7-segment numeric LED displays, bar graphs, or a matrix of 64 individual LEDs.
- It includes an on-chip BCD decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM for storing digit values.
- It communicates via a 3-wire serial interface (DIN, CLK, LOAD/CS) and is compatible with most microcontrollers.
### **Features:**
- **Decoding Capability:** On-chip BCD code-B decoder for 7-segment displays.
- **Multiplexing:** Digit multiplexing with adjustable scan limit (1 to 8 digits).
- **Brightness Control:** Digital and analog brightness adjustment (16-step dimming).
- **Low Power Shutdown Mode:** Includes a shutdown mode with reduced power consumption.
- **No External Components Needed:** Requires only a single resistor to set segment current.
- **Test Mode:** Allows all LEDs to be turned on for testing purposes.
- **Cascadable:** Multiple MAX7219s can be connected in series for larger displays.
This information is based on the manufacturer's datasheet. For exact performance characteristics, refer to the official documentation.
