5 Volt, Byte Alterable E2PROM The X28C256DI is a 256K (32K x 8) CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Density:** 256Kbit (32K x 8)
- **Technology:** CMOS floating gate
- **Supply Voltage:** 5V ±10%
- **Access Time:** 120ns, 150ns, 200ns (varies by speed grade)
- **Operating Temperature Range:**
- Commercial: 0°C to +70°C
- Industrial: -40°C to +85°C
- **Endurance:** 100,000 write cycles (minimum)
- **Data Retention:** 100 years (minimum)
- **Package:** 28-pin DIP (Dual In-line Package)
### **Descriptions:**
- The X28C256DI is a byte-erasable and byte-programmable EEPROM, allowing individual bytes to be rewritten without erasing the entire chip.
- It features a fast write cycle time (10ms max per byte) and supports a simple, microprocessor-compatible interface.
- The device includes built-in error correction and data polling for reliable operation.
### **Features:**
- **Byte-Write Capability:** Allows single-byte modification without full-chip erase.
- **Low Power Consumption:**
- Active Read Current: 30mA (max)
- Standby Current: 100µA (max)
- **Hardware & Software Data Protection:** Prevents accidental writes.
- **JEDEC Standard Pinout:** Compatible with other 28-pin EPROMs and EEPROMs.
- **Automatic Write Timing:** Internal control for simplified interfacing.
- **TTL-Compatible Inputs/Outputs:** Ensures easy integration with digital systems.
This information is based solely on the manufacturer's datasheet for the X28C256DI EEPROM.
