2764

M2764A - 64K (8K x 8) UV Erasable PROM

Overview

The M2764A is a high-performance 65,536-bit ultraviolet erasable and electrically programmable read-only memory (EPROM) organized as 8,192 words by 8 bits. This device features fast access times, low power consumption, and high reliability, making it suitable for a wide range of microprocessor-based systems. The M2764A utilizes floating gate technology and is packaged in a ceramic or plastic windowed package that allows for ultraviolet light erasure.

Key Features

• 65,536-bit organization (8K x 8)
• Single +5V ±10% power supply
• Fast access time: 200ns (max)
• Low power consumption:
  • Active current: 100mA (max)
  • Standby current: 40mA (max)
• Standard JEDEC-approved pinout
• Three-state outputs for bus compatibility
• Programmable with standard PROM programmers
• UV erasure window for complete data erasure
• Reliable CMOS technology
• 100,000 erase/write cycles minimum
• Data retention: 10 years minimum

Applications

The M2764A is ideal for use in a variety of applications including:

• Microprocessor-based systems
• Program storage for embedded systems
• Firmware storage
• Industrial control systems
• Automotive electronics
• Telecommunications equipment
• Medical instrumentation
• Military and aerospace systems

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): -0.3V to +7V
• Input Voltage: -0.3V to Vcc + 0.3V
• Output Voltage: -0.3V to Vcc + 0.3V
• Operating Temperature Range:
  • Commercial: 0°C to +70°C
  • Industrial: -40°C to +85°C
  • Military: -55°C to +125°C
• Storage Temperature: -65°C to +150°C

DC Characteristics (Vcc = 5V ±10%, TA = 25°C)

• Input High Voltage (Vih): 2.0V min
• Input Low Voltage (Vil): 0.8V max
• Output High Voltage (Voh): 2.4V min (Ioh = -400μA)
• Output Low Voltage (Vol): 0.45V max (Iol = 2.1mA)
• Input Leakage Current (Iin): ±1μA max
• Output Leakage Current (Iout): ±1μA max
• Vcc Supply Current (Active): 100mA max
• Vcc Supply Current (Standby): 40mA max

AC Characteristics

• Address Access Time (tAA): 200ns max
• Chip Enable Access Time (tACE): 200ns max
• Output Enable Access Time (tOE): 100ns max
• Chip Enable to Output in Low-Z (tCE): 100ns max
• Output Enable to Output in Low-Z (tOE): 50ns max
• Chip Disable to Output in High-Z (tDF): 100ns max
• Output Disable to Output in High-Z (tDF): 50ns max

Programming Characteristics

• Programming Voltage (Vpp): 12.75V ±0.25V
• Programming Pulse Width: 50ms max
• Programming Current (Ipp): 30mA max
• Programming Temperature: 25°C ±5°C
• Number of Programming Pulses: 25 max

Erase Characteristics

• UV Wavelength: 2537Å
• UV Intensity: 15mW/cm²
• Erase Time: 15-20 minutes (typical)
• Distance from UV Source: 1 inch

Package Information

The M2764A is available in the following package options:

• 28-pin Ceramic DIP (Windowed) - 600mil width
• 28-pin Plastic DIP (Windowed) - 600mil width
• 28-pin PLCC (Windowed)

Pin Configuration (28-pin DIP)

• Pin 1: Vpp (Programming Voltage)
• Pin 2: A12 (Address Input 12)
• Pin 3: A7 (Address Input 7)
• Pin 4: A6 (Address Input 6)
• Pin 5: A5 (Address Input 5)
• Pin 6: A4 (Address Input 4)
• Pin 7: A3 (Address Input 3)
• Pin 8: A2 (Address Input 2)
• Pin 9: A1 (Address Input 1)
• Pin 10: A0 (Address Input 0)
• Pin 11: DQ0 (Data Input/Output 0)
• Pin 12: DQ1 (Data Input/Output 1)
• Pin 13: DQ2 (Data Input/Output 2)
• Pin 14: GND (Ground)
• Pin 15: DQ3 (Data Input/Output 3)
• Pin 16: DQ4 (Data Input/Output 4)
• Pin 17: DQ5 (Data Input/Output 5)
• Pin 18: DQ6 (Data Input/Output 6)
• Pin 19: DQ7 (Data Input/Output 7)
• Pin 20: CE (Chip Enable)
• Pin 21: A10 (Address Input 10)
• Pin 22: OE (Output Enable)
• Pin 23: A11 (Address Input 11)
• Pin 24: A9 (Address Input 9)
• Pin 25: A8 (Address Input 8)
• Pin 26: A13 (Address Input 13)
• Pin 27: PGM (Program Pulse Input)
• Pin 28: Vcc (+5V Power Supply)

Functional Description

The M2764A operates in three modes: read, standby, and programming. In read mode, the memory contents are accessed by applying addresses to the address inputs while CE and OE are held low. In standby mode (CE high), power consumption is reduced. Programming is accomplished by applying Vpp (12.75V) to the programming pin, applying the address and data, and then pulsing PGM low for the specified duration.

Quality and Reliability

The M2764A is manufactured under strict quality control procedures and meets or exceeds the following reliability standards:

• Endurance: 100,000 program/erase cycles minimum