5 Volt, Byte Alterable E2PROM The X28C256JI-25 is a 256Kbit (32K x 8) CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor. Below are its specifications, descriptions, and features:
### **Specifications:**
- **Density:** 256Kbit (32K x 8)
- **Technology:** CMOS EEPROM
- **Operating Voltage:** 5V ±10%
- **Access Time:** 250ns (max)
- **Operating Temperature Range:**
- Commercial: 0°C to +70°C
- Industrial: -40°C to +85°C
- **Package:** 28-pin PLCC (Plastic Leaded Chip Carrier)
- **Endurance:** 100,000 write cycles (minimum)
- **Data Retention:** 100 years (minimum)
- **Interface:** Parallel (Byte-wide)
### **Descriptions:**
- The X28C256JI-25 is a non-volatile memory device that allows for electrically erasable and reprogrammable data storage.
- It supports a simple byte-write operation and features a fast read access time of 250ns.
- The device includes an internal write control circuit for automatic programming and erase operations.
- It is compatible with standard microprocessor interfaces.
### **Features:**
- **Low Power Consumption:**
- Active Read Current: 30mA (max)
- Standby Current: 100µA (max)
- **Automatic Write Timing:** Internal control eliminates the need for external timing components.
- **Hardware & Software Data Protection:**
- VCC detection circuitry prevents writes during power transitions.
- Write Lockout when VCC is below 3.2V.
- **Fast Write Cycle Time:**
- Byte Write: 200µs (typical)
- Page Write (optional): 2ms (typical)
- **High Reliability:**
- Endurance: 100,000 cycles per byte
- Data retention: 100 years
- **Industry-Standard Pinout:** Compatible with other 28-pin EEPROMs and EPROMs.
This device is suitable for applications requiring non-volatile memory storage with fast access times and high endurance.
