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MAX7221CWG from MAX,MAXIM - Dallas Semiconductor

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MAX7221CWG

Manufacturer: MAX, MAXIM

Serially Interfaced / 8-Digit LED Display Drivers

Partnumber Manufacturer Quantity Availability
MAX7221CWG MAX, MAXIM 187 In Stock

Description and Introduction

Serially Interfaced / 8-Digit LED Display Drivers The MAX7221CWG is a serial input/output common-cathode display driver from Maxim Integrated. Here are the factual details:

### **Manufacturer:**  
- **MAX (Maxim Integrated)**  

### **Specifications:**  
- **Type:** LED Display Driver (Common-Cathode)  
- **Interface:** Serial (SPI-compatible)  
- **Supply Voltage (V+):** 4V to 5.5V  
- **Output Current per Segment:** 10mA to 100mA (adjustable)  
- **Number of Digits:** 8 (7-segment digits or 8 individual LEDs)  
- **Brightness Control:** Digital (16-step)  
- **Data Format:** BCD or No-Decode (raw segment control)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package:** 24-pin SOIC (Wide)  

### **Descriptions:**  
- The MAX7221CWG is a compact, serial-interfaced LED driver designed to control 7-segment numeric LED displays or discrete LEDs.  
- It includes an on-chip BCD decoder, multiplex scan circuitry, segment drivers, and a digit driver.  
- Supports SPI, QSPI, and MICROWIRE serial interfaces for easy microcontroller integration.  
- Features low-power shutdown mode and software brightness control.  

### **Features:**  
- **Serial Data Interface:** Reduces microcontroller I/O requirements.  
- **Decoding Options:** Supports BCD or no-decode modes.  
- **Multiplexed Display Control:** Drives up to 8 digits.  
- **Brightness Adjustment:** 16-step digital control.  
- **Low-Power Shutdown Mode:** Includes data retention.  
- **Segment Drive Capability:** Up to 100mA per segment.  
- **Package:** 24-pin SOIC (Wide Gull Wing).  

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

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 SPI interface and register set as the MAX7221, widely used as a direct drop-in replacement.
  • TM1638 --: Integrated LED display driver with key-scan and serial interface, functionally similar for driving 7-segment displays in place of the MAX7221.
  • ICM7218 --: 8-digit 7-segment LED display driver with a similar multiplexed drive architecture, suitable as a functional substitute in display applications.
  • ICM7218CIQI --: 8-digit LED display driver with similar multiplexed drive and serial interface, widely used as a MAX7221 substitute in display applications.
  • TM1640 --: Low-cost 8-digit LED display driver with serial interface, functionally comparable for multiplexed 7-segment display control.
  • HD7279A --: Serial LED display/keyboard driver offering similar display driving capability, commonly used as an alternative in panel display designs.

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