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MAX7219EWG from MAX,MAXIM - Dallas Semiconductor

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MAX7219EWG

Manufacturer: MAX, MAXI, MIXIM, MAXIM

Serially Interfaced / 8-Digit LED Display Drivers

Partnumber Manufacturer Quantity Availability
MAX7219EWG MAX, MAXI, MIXIM, MAXIM 221 In Stock

Description and Introduction

Serially Interfaced / 8-Digit LED Display Drivers The MAX7219EWG is a compact, serial input/output common-cathode display driver from Maxim Integrated (now part of Analog Devices).  

### **Manufacturer:**  
- **MAX** (Maxim Integrated, now part of Analog Devices)  

### **Specifications:**  
- **Type:** LED Display Driver (Common-Cathode)  
- **Interface:** Serial (SPI-compatible)  
- **Supply Voltage (V+):** 4V to 5.5V  
- **LED Segment Current:** Adjustable via external resistor (typically 40mA max per segment)  
- **Maximum Output Current:** 320mA (8 segments × 40mA)  
- **Maximum Clock Frequency:** 10MHz  
- **Number of Digits Driven:** Up to 8 (7-segment digits or 8x8 LED matrix)  
- **Package:** 24-pin SOIC (Wide)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Features:**  
  - Serial interface with cascading support (multiple MAX7219 can be daisy-chained)  
  - Individual LED segment control  
  - Decode/no-decode modes for 7-segment displays  
  - Digital and analog brightness control  
  - Low-power shutdown mode  
  - High noise immunity  

### **Descriptions and Features:**  
- The MAX7219EWG is designed to drive common-cathode LED displays, including 7-segment numeric displays and dot matrix displays.  
- It includes an on-chip BCD decoder, multiplex scan circuitry, and segment drivers.  
- Brightness can be adjusted digitally (16 steps) or via an external resistor.  
- Supports SPI-compatible serial data input for easy microcontroller interfacing.  
- Multiple devices can be cascaded to control larger displays.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Serially Interfaced / 8-Digit LED Display Drivers

Alternative Part Number

  • AS1107 --: Pin-compatible 8-digit LED display driver with the same serial interface and register set as the MAX7219, widely used as a direct drop-in replacement.
  • ICM7218 --: Similar 8-digit multiplexed LED display driver with serial input, suitable functional substitute when minor interface adaptation is acceptable.
  • MAX7221 --: Same family 8-digit LED driver with identical pinout and function but with slew-rate-limited segment drivers for reduced EMI; different suffix series from the source.
  • MAX7221EWG --: Same silicon family and package with identical driving capability, but with improved SPI compatibility and reduced segment slew rate for lower EMI.
  • TM1638 --: Integrated LED driver and key-scan controller suitable for similar display applications, offering a cost-effective alternative when minor interface changes are acceptable.

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