Serially Interfaced / 8-Digit LED Display Drivers The MAX7221ENG is a serial input/output common-cathode display driver manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Part Number:** MAX7221ENG
- **Package:** 24-Pin DIP (Dual In-Line Package)
- **Operating Voltage:** 4V to 5.5V
- **Supply Current:** 330µA (typical)
- **Maximum Segment Current:** 40mA per segment
- **Maximum Display Current:** 160mA (8 segments × 20mA)
- **Data Transfer Rate:** 10MHz (SPI-compatible serial interface)
- **Operating Temperature Range:** -40°C to +85°C
- **Digit Drive:** 8 digits (7-segment numeric or 8 individual LEDs)
- **Decoding:** On-chip BCD code-B decoder for 7-segment displays
- **Brightness Control:** Digital (16-step) via PWM
### **Descriptions:**
The MAX7221ENG is a compact, serial-interfaced LED display driver capable of controlling up to 8 digits of 7-segment displays or 64 individual LEDs. It includes an on-chip BCD decoder, multiplex scan circuitry, and segment drivers, reducing the need for external components. It communicates via a 4-wire SPI-compatible serial interface, making it suitable for microcontroller-based systems.
### **Features:**
- **SPI-Compatible Serial Interface** – Simplifies microcontroller interfacing.
- **Multiplexed Display Control** – Supports up to 8 digits (7-segment) or 64 LEDs.
- **On-Chip BCD Decoder** – Converts binary data to 7-segment display format.
- **Digital Brightness Control** – Adjustable via 16-step PWM.
- **Low Power Consumption** – Typically 330µA supply current.
- **Segment Drive Capability** – Up to 40mA per segment.
- **No External Components Required** – Built-in scan and driver circuitry.
- **Thermal Shutdown Protection** – Prevents damage from excessive current.
- **Industrial Temperature Range** – Operates from -40°C to +85°C.
This information is strictly factual and derived from the manufacturer's datasheet.
