512 Kbit 64Kb x8 Low Voltage UV EPROM and OTP EPROM The **M27W512-100K6TR** is a 512-Kbit (64K x 8) UV EPROM (Erasable Programmable Read-Only Memory) manufactured by **STMicroelectronics (ST)**. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Memory Size:** 512 Kbit (64K x 8)
- **Technology:** UV EPROM (Erasable and Programmable via Ultraviolet Light)
- **Access Time:** 100 ns
- **Operating Voltage:** 5V ±10%
- **Operating Temperature Range:**
- Commercial: **0°C to +70°C**
- Industrial: **-40°C to +85°C**
- **Package Type:** **PLCC-32** (Plastic Leaded Chip Carrier)
- **Programming Voltage (VPP):** 12.5V
- **Standby Current:** 100 µA (max)
- **Active Current:** 30 mA (max)
### **Descriptions:**
- The **M27W512** is a high-performance UV EPROM with a fast access time of **100 ns**.
- It is organized as **65,536 words of 8 bits each (64K x 8)**.
- Data is retained for over **10 years** when stored at temperatures below **85°C**.
- Erasure is achieved by exposing the chip to **UV light** (wavelength 2537 Å) for **15-30 minutes**.
- Compatible with **JEDEC standards** for EPROMs.
### **Features:**
- **Fast Read Access Time:** 100 ns
- **Low Power Consumption:**
- **Active Current:** 30 mA (max)
- **Standby Current:** 100 µA (max)
- **Single 5V Supply for Read Operation**
- **Programming Voltage (VPP):** 12.5V
- **High Noise Immunity**
- **TTL-Compatible Inputs/Outputs**
- **PLCC-32 Package for Compact Design**
- **Industrial-Grade Temperature Range Available (-40°C to +85°C)**
This EPROM is commonly used in embedded systems, industrial controls, and legacy computing applications requiring non-volatile memory with reprogrammability.
