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X28HC64J-90 from XICOR

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X28HC64J-90

Manufacturer: XICOR, INTERSIL

5 Volt, Byte Alterable E2PROM

Partnumber Manufacturer Quantity Availability
X28HC64J-90,X28HC64J90 XICOR, INTERSIL 900 In Stock

Description and Introduction

5 Volt, Byte Alterable E2PROM The **X28HC64J-90** is a high-speed CMOS EEPROM manufactured by **Intersil**. Below are its key specifications, descriptions, and features:  

### **Specifications:**  
- **Memory Size:** 64K (8K x 8)  
- **Technology:** High-Speed CMOS  
- **Access Time:** 90ns  
- **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:** 10 years minimum  
- **Package:** 28-pin PLCC (Plastic Leaded Chip Carrier)  

### **Descriptions:**  
- The **X28HC64J-90** is a **64K-bit (8K x 8) Electrically Erasable PROM (EEPROM)** with a fast access time of **90ns**.  
- It features a **byte-write capability**, allowing individual bytes to be written without erasing the entire chip.  
- The device supports a **5V-only operation**, making it compatible with standard microprocessor systems.  
- It includes **automatic write timing** with an internal control circuit for simplified interfacing.  

### **Features:**  
- **High-Speed Read Access:** 90ns maximum  
- **Low Power Consumption:**  
  - Active Current: **30mA (max)**  
  - Standby Current: **100μA (max)**  
- **Hardware & Software Data Protection:**  
  - **VCC Sense:** Prevents writes during power transitions  
  - **Write Protect (WP) Pin:** Enables/disabled write operations  
- **Self-Timed Byte Write Cycle:** Typically **5ms**  
- **JEDEC Standard Pinout:** Compatible with industry-standard 28-pin EEPROMs  
- **Industrial-Grade Reliability:** High endurance and long data retention  

This EEPROM is designed for applications requiring **non-volatile memory storage**, such as **embedded systems, industrial controls, and telecommunications equipment**.  

*(Source: Intersil Datasheet for X28HC64J-90)*

Application Scenarios & Design Considerations

5 Volt, Byte Alterable E2PROM

Alternative Part Number

  • AT28C64B-15JU --: 64Kbit parallel EEPROM with similar 28-pin package and pinout; widely available and a common drop-in replacement for X28HC64 series.
  • M28C64-15N6 --: 64Kbit parallel EEPROM in a compatible 28-pin package with comparable access time and interface.
  • NM28C64-15 --: 64Kbit parallel EEPROM offering similar organization and timing, usable as a functional substitute.
  • NM28C64-90 --: 64Kbit parallel EEPROM with 90ns access time matching the original speed grade, usable as an alternative when sourcing the Intersil part is difficult.

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