8-Digit, Microprocessor- Compatible, LED Display Decoder Driver The ICM7228AMJI/883B is a high-performance, radiation-hardened, 8-digit LED display driver manufactured by Harris Semiconductor (now part of Intersil). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Harris Semiconductor (Intersil)
- **Part Number:** ICM7228AMJI/883B
- **Technology:** Radiation-Hardened (for space and military applications)
- **Display Type:** Drives 8-digit LED displays (common cathode)
- **Supply Voltage:** 4.5V to 6V
- **Current Consumption:** Typically 5mA (excluding display drive)
- **Segment Drive Current:** Up to 25mA per segment
- **Digit Drive Current:** Up to 200mA per digit
- **Operating Temperature Range:** -55°C to +125°C
- **Package:** 28-pin CerDIP (Dual-In-Line)
- **Interface:** Parallel (4-bit or 8-bit) or Serial (SPI-like)
- **Multiplexing:** 8:1 multiplex ratio
### **Descriptions:**
- The ICM7228AMJI/883B is a radiation-hardened version designed for harsh environments, including aerospace and military applications.
- It integrates an 8-digit LED display driver with a built-in BCD-to-7-segment decoder and multiplexing circuitry.
- Supports both parallel and serial data input modes for flexible interfacing with microcontrollers or logic circuits.
- Features include programmable brightness control, blanking, and test modes.
### **Features:**
- **Radiation-Hardened:** Qualified for MIL-STD-883B standards.
- **Multiple Interface Options:** Parallel (4/8-bit) or serial input.
- **On-Chip Decoder:** Converts BCD or hex inputs to 7-segment outputs.
- **Brightness Control:** Adjustable via external resistor or PWM.
- **Low Power Consumption:** Suitable for battery-operated systems.
- **High Drive Capability:** Directly drives common-cathode LED displays.
- **Test Mode:** Allows all segments to be lit for display testing.
This device is primarily used in mission-critical applications requiring high reliability, such as avionics, military displays, and space systems.
