5 Volt, Byte Alterable E2PROM The X28HC256D-70 is a high-speed CMOS EEPROM manufactured by XICOR. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Memory Size:** 256Kbit (32K x 8)
- **Technology:** High-Speed CMOS
- **Access Time:** 70ns
- **Operating Voltage:** 5V ±10%
- **Operating Temperature Range:**
- Commercial: 0°C to +70°C
- Industrial: -40°C to +85°C
- **Endurance:** 100,000 write cycles per byte
- **Data Retention:** 100 years
- **Package Options:** 28-pin DIP, PLCC, or SOIC
### **Descriptions:**
- The X28HC256D-70 is a byte-erasable EEPROM, allowing individual byte modification without requiring a full chip erase.
- It features a fast read access time of 70ns, making it suitable for high-performance applications.
- The device supports a simple 3-wire interface for write operations.
### **Features:**
- **High-Speed Performance:** 70ns access time for fast read operations.
- **Low Power Consumption:**
- Active current: 30mA (typical)
- Standby current: 100μA (typical)
- **Byte-Write Capability:** Allows individual byte programming.
- **Software Data Protection (SDP):** Prevents accidental writes.
- **Automatic Write Timing:** Internal control for simplified write cycles.
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard logic levels.
- **Reliable Data Retention:** Guaranteed for 100 years.
This information is based on the manufacturer's datasheet for the X28HC256D-70 EEPROM.
