2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan The **MAX6959AAEE+** is a **4-wire serial-interfaced**, **2.7V to 5.5V**, **28-port general-purpose I/O expander** manufactured by **Maxim Integrated (now part of Analog Devices)**.  

### **Key Specifications:**  
- **Manufacturer:** Maxim Integrated  
- **Package:** 16-QSOP  
- **Operating Voltage:** 2.7V to 5.5V  
- **Interface:** 4-wire SPI-compatible serial  
- **Number of I/O Ports:** 28 (individually configurable as inputs or outputs)  
- **Output Drive Capability:** 20mA sink/source per I/O  
- **Operating Temperature Range:** -40°C to +85°C  

### **Features:**  
- **Individually Configurable I/O Ports:** Each of the 28 I/O pins can be independently set as an input or output.  
- **High Output Drive:** Capable of sourcing/sinking 20mA per I/O.  
- **Low-Power Operation:** Suitable for battery-powered applications.  
- **SPI-Compatible Interface:** Supports high-speed serial communication.  
- **Interrupt Output:** Provides an interrupt signal when input port states change.  
- **Internal Pull-Up Resistors:** Configurable on a per-port basis.  
- **LED Drive Capability:** Can directly drive LEDs without external resistors.  

### **Applications:**  
- Industrial control systems  
- LED displays  
- Keypad interfaces  
- General-purpose I/O expansion  

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

2-Wire Interfaced, 3V to 5.5V, 4-Digit, 9-Segment LED Display Drivers with Keyscan