M27128A 128K (16K x 8) UV Erasable PROM

Overview

The M27128A is a high-performance 131,072-bit ultraviolet erasable programmable read-only memory (EPROM) organized as 16,384 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 M27128A uses a single 5V power supply and is fabricated with advanced CMOS technology for improved performance.

Key attributes include:

• 131,072-bit memory organization (16K x 8)
• UV erasable window for chip reprogramming
• Single 5V ±10% power supply operation
• Compatible with industry-standard 27128 pinout
• Designed for high-reliability applications

Features

Performance Characteristics

• Fast access time: 200ns (max)
• Low power consumption:
  • Active current: 30mA (max)
  • Standby current: 100μA (max)
• Programmable with standard PROM programmers

Reliability Features

• Endurance: Minimum 100 programming cycles
• Data retention: 10 years minimum
• Static memory cell design
• All inputs and outputs TTL-compatible

Control Interface

• Chip Enable (CE) and Output Enable (OE) controls
• Two-line control for simple microprocessor interface
• Three-state outputs for bus compatibility

Applications

The M27128A is designed for use in a wide variety of digital systems including:

• Microprocessor-based systems
• Industrial control systems
• Automotive electronics
• Telecommunications equipment
• Medical instrumentation
• Military and aerospace systems

Typical applications include:

• Firmware storage
• System BIOS
• Look-up tables
• Program storage for embedded systems
• Code storage in development 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
• Storage Temperature: -65°C to +125°C
• Operating Temperature: 0°C to +70°C (commercial)

DC Characteristics (Vcc = 5V ±10%, TA = 0°C to 70°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)
• Supply Current (Active): 30mA max
• Supply Current (Standby): 100μA max

AC Characteristics

• Address Access Time (tACC): 200ns max
• Chip Enable Access Time (tCE): 200ns max
• Output Enable Time (tOE): 100ns max
• Read Cycle Time (tRC): 200ns min
• Output Hold Time (tOH): 0ns min

Package Information

Standard Package Options

• 28-pin Plastic Dual In-line Package (PDIP)
• 28-pin Plastic Leaded Chip Carrier (PLCC)
• 28-pin Small Outline Package (SOP)

PDIP Package Dimensions

• Package Width: 15.24mm (0.600 inch)
• Package Length: 36.32mm (1.430 inch)
• Lead Pitch: 2.54mm (0.100 inch)
• Window Dimensions: 12.7mm x 5.08mm (0.500 x 0.200 inch)

Handling and Programming

• UV erasure requires exposure to 2537Å wavelength light
• Typical erasure time: 15-20 minutes at 12,000μW/cm²
• Programming voltage: 12.5V ±0.5V
• Programming algorithm: Standard Intel algorithm supported

Ordering Information

The device is available in several speed grades and package options:

• M27128A-20: 200ns access time, PDIP package
• M27128A-20F: 200ns access time, PLCC package
• M27128A-25: 250ns access time, PDIP package
• M27128A-25F: 250ns access time, PLCC package

Quality and Reliability

The M27128A meets or exceeds the following quality standards:

• MIL-STD-883 compliant testing available
• ESD protection: >2000V (Human Body Model)
• Latch-up protection: >100mA
• Burn-in testing available for high-reliability applications