512 Kbit (64K x8) UV EPROM and OTP EPROM The **M27C512-20F6** is a 512 Kbit (64K x 8) UV erasable and electrically programmable read-only memory (EPROM) manufactured by **STMicroelectronics**.
### **Key Specifications:**
- **Memory Capacity:** 512 Kbit (64K x 8)
- **Access Time:** 200 ns
- **Operating Voltage:** 5V ±10%
- **Power Consumption:**
- Active Current: 30 mA (max)
- Standby Current: 100 µA (max)
- **Package:** 28-lead PLCC (Plastic Leaded Chip Carrier)
- **Technology:** CMOS floating-gate
- **Programming Voltage (VPP):** 12.5V
- **Data Retention:** 10 years minimum
- **Operating Temperature Range:** 0°C to +70°C
### **Features:**
- **UV Erasable:** Can be erased via exposure to UV light (typically 15-20 minutes under UV lamp).
- **Electrically Programmable:** Byte-wise programming with 12.5V programming voltage.
- **Single 5V Supply:** Operates on a standard 5V power supply.
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard logic levels.
- **High Noise Immunity:** CMOS technology provides strong resistance to noise.
- **Three-State Outputs:** Allows bus sharing in microprocessor systems.
- **JEDEC Standard Pinout:** Ensures compatibility with other EPROMs.
### **Applications:**
- Microcontroller-based systems
- Firmware storage
- Legacy embedded systems
- Industrial control systems
This EPROM is commonly used in older electronic systems requiring non-volatile memory storage with reprogramming capability.
