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DM74S188AN from NS,National Semiconductor

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DM74S188AN

Manufacturer: NS

25 ns, (32 x 8) 256-bit TTL PROM

Partnumber Manufacturer Quantity Availability
DM74S188AN NS 4 In Stock

Description and Introduction

25 ns, (32 x 8) 256-bit TTL PROM The DM74S188AN is a 256-bit (32 x 8) bipolar PROM (Programmable Read-Only Memory) manufactured by National Semiconductor (NS).  

### Key Specifications:  
- **Technology**: Bipolar (TTL)  
- **Organization**: 32 words x 8 bits  
- **Access Time**: Typically 50 ns  
- **Power Supply**: +5V  
- **Package**: 24-pin DIP (Dual In-line Package)  
- **Operating Temperature Range**: 0°C to +70°C (commercial grade)  
- **Programming**: Requires a PROM programmer for initial programming  

### Features:  
- Schottky-clamped for high speed  
- Fully decoded outputs  
- Tri-state outputs for bus-oriented applications  

This part is now considered obsolete but was widely used in early digital systems for firmware storage.

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