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The M27C256B-15F1 is a UV erasable and electrically programmable read-only memory (EPROM) manufactured by STMicroelectronics (STM). Here are its key specifications, descriptions, and features:

Specifications:

• Memory Size: 256 Kbit (32K x 8 bits)
• Access Time: 150 ns
• Operating Voltage: 5V ± 10%
• Programming Voltage (VPP): 12.5V
• Power Consumption:
• Active Current: 30 mA (max)
• Standby Current: 100 µA (max)
• Technology: CMOS
• Package: 28-lead Ceramic Frit-Seal DIP (Dual In-line Package)
• Operating Temperature Range: 0°C to +70°C

Descriptions:

• The M27C256B-15F1 is a high-performance EPROM designed for applications requiring non-volatile memory storage.
• It features UV erasure, allowing the entire memory to be reset by exposure to ultraviolet light.
• The device supports standard EPROM programming methods and is compatible with industry-standard programmers.

Features:

• High Reliability: Endurance of at least 100 programming cycles.
• Low Power Consumption: CMOS technology ensures efficient power usage.
• Byte-Wide Organization: 32K x 8-bit structure for flexible data storage.
• Three-State Output: Allows bus sharing in microprocessor-based systems.
• Industrial Standard Pinout: Compatible with other 256 Kbit EPROMs.

This EPROM is commonly used in embedded systems, industrial controls, and legacy computing applications.

*(Source: STMicroelectronics datasheet for M27C256B-15F1.)*