5 Volt, Byte Alterable E2PROM The X28C256DI-20 is a 256Kbit (32K x 8) CMOS EEPROM manufactured by XICOR. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Organization:** 32K x 8 (256Kbit)
- **Operating Voltage:** 5V ±10%
- **Access Time:** 200ns (max)
- **Write Cycle Time:** 10ms (max)
- **Endurance:** 100,000 write cycles per byte
- **Data Retention:** 100 years
- **Operating Temperature Range:** 0°C to +70°C (Commercial)
- **Package:** 28-pin DIP (Dual In-line Package)
### **Descriptions:**
- The X28C256DI-20 is a high-performance, byte-erasable EEPROM with a fast read access time.
- It supports both parallel and software data protection mechanisms to prevent accidental writes.
- The device is fully compatible with JEDEC standards for pin configuration and timing.
### **Features:**
- **Fast Read Access:** 200ns maximum access time.
- **Byte-Write Capability:** Allows individual byte modification without requiring a full chip erase.
- **Low Power Consumption:**
- Active Read Current: 30mA (max)
- Standby Current: 100μA (max)
- **Hardware & Software Data Protection:** Prevents inadvertent writes.
- **CMOS Technology:** Ensures high reliability and low power consumption.
- **Self-Timed Write Cycle:** Eliminates the need for external timing components.
- **TTL-Compatible Inputs/Outputs:** Ensures easy interfacing with standard logic circuits.
This information is based on the manufacturer's datasheet for the X28C256DI-20 EEPROM.
