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M27C64A 64Kbit EPROM Technical Summary

Overview

The M27C64A is a high-performance 64Kbit (8K x 8) Erasable Programmable Read-Only Memory (EPROM) designed for applications requiring non-volatile storage. This component is fabricated using advanced CMOS technology, offering low power consumption and high reliability. The M27C64A features a two-line control interface, making it easy to integrate into various digital systems. It is housed in a durable package, ensuring robustness in industrial and commercial environments.

Features

• 64Kbit Memory Organization: 8,192 words x 8 bits for flexible data storage.
• Low Power Consumption: CMOS technology ensures efficient power usage, making it suitable for battery-operated devices.
• Fast Access Time: High-speed read operations with access times as low as 150ns.
• Two-Line Control Interface: Simplifies system integration with minimal control lines.
• Single 5V Power Supply: Operates on a standard 5V supply, compatible with most digital systems.
• UV Erasable: Data can be erased via ultraviolet light exposure, allowing for reprogramming.
• High Reliability: Endurance of 100,000 erase/program cycles and data retention of 10 years.
• Wide Operating Temperature Range: Suitable for industrial applications with a range of -40°C to +85°C.

Applications

The M27C64A is widely used in applications requiring non-volatile memory storage, including:

• Embedded Systems: Firmware storage for microcontrollers and processors.
• Industrial Control Systems: Program storage for PLCs and automation equipment.
• Consumer Electronics: Code and data storage in devices like gaming consoles and set-top boxes.
• Automotive Systems: Non-volatile memory for engine control units and infotainment systems.
• Telecommunications: Firmware storage in networking equipment and modems.
• Medical Devices: Reliable data storage in diagnostic and monitoring equipment.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.5V to +7.0V
• Input Voltage (V_IN): -0.5V to V_CC + 0.5V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

DC Characteristics

• Supply Current (Read Mode): 30mA max at 5V, 150ns access time
• Standby Current: 100μA max
• Input Leakage Current: ±1μA max
• Output Leakage Current: ±1μA max

AC Characteristics

• Access Time (t_ACC): 150ns, 200ns, 250ns variants
• Chip Enable to Output Delay (t_CE): 150ns max
• Output Enable to Output Delay (t_OE): 100ns max
• Write Pulse Width (t_WP): 100ms min

Package Information

The M27C64A is available in several industry-standard packages, ensuring compatibility with various PCB designs and assembly processes.

• 28-Pin Plastic Dual In-Line Package (PDIP):
  • Dimensions: 36.32mm x 13.97mm
  • Pin Pitch: 2.54mm
  • RoHS compliant
• 28-Pin Ceramic Dual In-Line Package (CERDIP):
  • Dimensions: 36.32mm x 13.97mm
  • Pin Pitch: 2.54mm
  • High-temperature tolerance
• 32-Pin Plastic Leaded Chip Carrier (PLCC):
  • Dimensions: 13.97mm x 11.43mm
  • Pin Pitch: 1.27mm
  • Surface-mount compatible

Programming and Erasure

The M27C64A supports standard EPROM programming and erasure procedures:

• Programming: Data is written using a 12.75V programming voltage (V_PP) with a series of timed pulses.
• Verification: Each programmed byte is verified to ensure data integrity.
• Erasure: The entire memory is erased by exposing the quartz window to UV light (wavelength 2537Å) for 15-20 minutes.

Conclusion

The M27C64A is a versatile and reliable EPROM solution for applications requiring non-volatile memory. Its combination of low power consumption, high-speed operation, and robust packaging makes it suitable for a wide range of industrial, automotive, and consumer electronics applications. With its UV erasability and reprogrammable nature, the M27C64A remains a cost-effective choice for firmware and data storage needs.

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