5 Volt, Byte Alterable E2PROM The X28C256P-20 is a 256K-bit (32K x 8) CMOS EEPROM manufactured by XICOR. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Organization:** 32K x 8
- **Density:** 256K-bit
- **Access Time:** 200 ns (X28C256P-20)
- **Operating Voltage:** 5V ±10%
- **Operating Temperature Range:** Commercial (0°C to +70°C)
- **Endurance:** 100,000 write cycles per byte (minimum)
- **Data Retention:** 100 years (minimum)
- **Package:** 28-pin DIP (Dual In-line Package)
- **Interface:** Parallel
### **Descriptions:**
- **High-Speed Read Operation:** Fast access time for efficient data retrieval.
- **Low Power Consumption:** CMOS technology ensures low power usage.
- **Byte-Write Capability:** Allows individual byte writes without requiring a full chip erase.
- **Hardware & Software Data Protection:** Includes write protection features to prevent accidental data corruption.
- **JEDEC Standard Pinout:** Compatible with other industry-standard EEPROMs.
### **Features:**
- **Automatic Write Timing:** Internal control for simplified write operations.
- **Self-Timed Erase/Write Cycle:** No external timing components required.
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard logic levels.
- **Power-On Reset:** Prevents inadvertent writes during power transitions.
- **Industrial-Grade Options Available:** Extended temperature range variants (e.g., X28C256I).
This device is commonly used in applications requiring non-volatile memory storage, such as embedded systems, industrial controls, and consumer electronics.
