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X28HC256KM-12 from XICOR

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X28HC256KM-12

Manufacturer: XICOR

5 Volt, Byte Alterable E2PROM

Partnumber Manufacturer Quantity Availability
X28HC256KM-12,X28HC256KM12 XICOR 200 In Stock

Description and Introduction

5 Volt, Byte Alterable E2PROM The **X28HC256KM-12** is a high-speed CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by **Xicor**. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Memory Size:** 256 Kbit (32K x 8-bit)  
- **Technology:** High-speed CMOS  
- **Access Time:** 120 ns  
- **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:** 28-pin PLCC (Plastic Leaded Chip Carrier)  

### **Descriptions:**
- The **X28HC256KM-12** is a byte-erasable EEPROM with a fast read access time of 120 ns.  
- It supports **in-system programming**, allowing for easy firmware updates without removing the chip.  
- Features a **page write mode** for faster programming (up to 32 bytes at a time).  
- Includes **software data protection** to prevent accidental writes.  

### **Features:**
- **High-Speed Read Operation:** 120 ns access time.  
- **Low Power Consumption:**  
  - Active current: 30 mA (typical)  
  - Standby current: 100 µA (typical)  
- **Hardware & Software Write Protection:** Prevents unintended data corruption.  
- **Page Write Mode:** Allows faster programming in 32-byte blocks.  
- **Self-Timed Write Cycle:** No external timing components required.  
- **CMOS Technology:** Ensures low power and high noise immunity.  
- **JEDEC Standard Pinout:** Compatible with other 28-pin EEPROMs.  

This device is commonly used in applications requiring non-volatile memory storage, such as embedded systems, industrial controls, and telecommunications equipment.  

Would you like additional details on any specific aspect?

Application Scenarios & Design Considerations

5 Volt, Byte Alterable E2PROM

Alternative Part Number

  • AT28HC256-12JC --: Same 32K x 8 high-speed parallel EEPROM with 120 ns access time, pin-compatible in PLCC package, from a well-established alternate vendor.
  • M28C256-12 --: 32K x 8 parallel EEPROM with comparable 120 ns speed and pinout, suitable drop-in replacement for the X28HC256.
  • SST39SF010A-70-4C-NHE --: 128K x 8 flash memory that can replace the EEPROM in many designs with faster 70 ns access, though pinout and write method should be verified.

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