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UPD41257C-15 from NEC

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UPD41257C-15

Manufacturer: NEC

262144 X 1-BIT DYNAMIC NMOS RAM

Partnumber Manufacturer Quantity Availability
UPD41257C-15,UPD41257C15 NEC 100 In Stock

Description and Introduction

262144 X 1-BIT DYNAMIC NMOS RAM The part **UPD41257C-15** is a **256K (262,144) x 1-bit Dynamic RAM (DRAM)** manufactured by **NEC**.  

### **Key Specifications:**  
- **Organization:** 262,144 words × 1 bit  
- **Access Time:** 150 ns  
- **Operating Voltage:** +5V ±10%  
- **Package:** 16-pin DIP (Dual In-line Package)  
- **Refresh Cycles:** 4,096 cycles every 64 ms  
- **Operating Temperature Range:** 0°C to +70°C  

### **Features:**  
- Fully static operation (no clock required)  
- Single +5V power supply  
- TTL-compatible inputs and outputs  
- Common I/O using three-state output  
- Low power consumption  

This DRAM was commonly used in early computing systems, embedded applications, and memory expansion modules.

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