5 Volt, Byte Alterable E2PROM The **X28HC256SM-12** is a high-speed CMOS **32K x 8 (256K-bit) EEPROM** manufactured by **INTERSIL**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Organization:** 32K x 8 (256K-bit)
- **Access Time:** 120ns
- **Operating Voltage:** 5V ±10%
- **Operating Temperature Range:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)
- **Endurance:** 100,000 write cycles per byte
- **Data Retention:** 10 years minimum
- **Package:** 28-lead SOIC (SM)
### **Descriptions:**
- The X28HC256 is a **high-speed, low-power** EEPROM designed for applications requiring non-volatile memory storage.
- It features a **byte-write capability**, allowing individual bytes to be written without erasing the entire chip.
- The device supports **JEDEC-standard pinout**, making it compatible with other industry-standard EEPROMs.
### **Features:**
- **Fast Read Access Time:** 120ns
- **Low Power Consumption:**
- Active current: 30mA (max)
- Standby current: 100μA (max)
- **Automatic Page Write Operation:** Up to 64 bytes can be written in a single operation.
- **Hardware & Software Data Protection:**
- Write protection via **/WE**, **/CE**, and **/OE** pins.
- Software-controlled write protection.
- **CMOS Technology:** Ensures high noise immunity and low power consumption.
- **Self-Timed Write Cycle:** Eliminates the need for external timing components.
This device is suitable for applications requiring **high-speed, non-volatile memory**, such as embedded systems, industrial controls, and telecommunications.
