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W29C020T-90 from Winbond

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W29C020T-90

Manufacturer: Winbond

256K X 8 CMOS FLASH MEMORY

Partnumber Manufacturer Quantity Availability
W29C020T-90,W29C020T90 Winbond 659 In Stock

Description and Introduction

256K X 8 CMOS FLASH MEMORY The W29C020T-90 is a 256K x 8 CMOS flash memory manufactured by Winbond. Below are its key specifications, descriptions, and features:  

### **Specifications:**  
- **Memory Size:** 2 Mbit (256K x 8)  
- **Operating Voltage:** 5V ± 10%  
- **Access Time:** 90 ns  
- **Organization:** 32 sectors (4K bytes/sector) or 8 sectors (32K bytes/sector)  
- **Endurance:** 100,000 program/erase cycles per sector  
- **Data Retention:** 10 years minimum  
- **Operating Temperature:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)  

### **Descriptions:**  
- The W29C020T-90 is a 5V-only flash memory with a uniform sector architecture.  
- It supports both byte and sector erase operations.  
- Compatible with JEDEC-standard pinouts for easy replacement of EPROMs.  
- Features a command-driven interface for in-system programming and erasure.  

### **Features:**  
- **Single 5V Power Supply** for read, program, and erase operations.  
- **Low Power Consumption:**  
  - Active Read Current: 30 mA (typical)  
  - Standby Current: 100 µA (typical)  
- **Hardware Data Protection:**  
  - VCC lockout during power transitions  
  - Write protection via control pin (WE#)  
- **Automatic Program & Erase Algorithms** with status polling and toggle bit detection.  
- **Sector Protection:** Software-controlled locking/unlocking of sectors.  
- **Packaging:** 32-pin PDIP, PLCC, TSOP, or SOP options.  

This device is commonly used in embedded systems, BIOS storage, and other applications requiring non-volatile memory.

Application Scenarios & Design Considerations

256K X 8 CMOS FLASH MEMORY

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