M27W102 1 Mbit EPROM Technical Summary

Overview

The M27W102 is a low-voltage 1 Mbit (128K x 8) EPROM (Erasable Programmable Read-Only Memory) available in two variants: UV-erasable (ultraviolet) and OTP (One-Time Programmable). This component is designed for applications requiring non-volatile memory storage with flexible programming options. The device operates at a low voltage, making it suitable for power-sensitive designs while maintaining robust performance in industrial and commercial environments.

The M27W102 is housed in a compact package, offering a cost-effective solution for embedded systems, legacy designs, and applications requiring reliable firmware storage. Its architecture ensures fast read access times and compatibility with standard EPROM programming equipment.

Features

• Memory Capacity: 1 Mbit (128K x 8 organization)
• Voltage Range: Low-voltage operation (specific range to be confirmed per datasheet)
• Variants: Available in UV-erasable and OTP (One-Time Programmable) options
• Access Time: Fast read access times (exact speed dependent on model)
• Programming Voltage: Standard +12V programming voltage (typical for EPROMs)
• Data Retention: Guaranteed data retention for 10 years or more
• Temperature Range: Commercial (0°C to +70°C) and Industrial (-40°C to +85°C) options
• Compatibility: Pin-compatible with other standard EPROMs for easy replacement
• Two-Line Control: Simplified interface for read and programming operations

Applications

The M27W102 is suited for a wide range of applications, particularly where non-volatile memory storage is required. Key application areas include:

• Embedded Systems: Firmware storage for microcontrollers and legacy systems
• Industrial Control: Program storage for PLCs, motor controllers, and automation equipment
• Consumer Electronics: Code storage in appliances, audio equipment, and gaming systems
• Automotive: Non-volatile memory for infotainment and control modules (where applicable)
• Medical Devices: Program storage in diagnostic and monitoring equipment
• Telecommunications: Firmware storage in networking and communication devices

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VCC): -0.3V to +7.0V
• Programming Voltage (VPP): -0.3V to +13.5V
• Input Voltage: -0.3V to VCC + 0.3V
• Operating Temperature: -40°C to +85°C (Industrial), 0°C to +70°C (Commercial)
• Storage Temperature: -65°C to +150°C

DC Characteristics

• Supply Current (Active): Typically 30 mA (at 5V, 1 MHz)
• Supply Current (Standby): Typically 100 µA
• Input Leakage Current: ±1 µA max
• Output Leakage Current: ±1 µA max
• Output High Voltage: 2.4V min (at specified load)
• Output Low Voltage: 0.4V max (at specified load)

AC Characteristics

• Address Access Time: 70 ns (fastest grade)
• Chip Enable Access Time: 70 ns
• Output Enable Access Time: 30 ns
• Programming Time: 100 µs per byte (typical)

Package Information

The M27W102 is available in multiple package options to suit different application requirements:

Standard Package Options

• PDIP (Plastic Dual In-line Package): 32-pin, 600 mil width
• PLCC (Plastic Leaded Chip Carrier): 32-pin, J-lead
• TSOP (Thin Small Outline Package): 32-pin, thin profile for space-constrained applications

Package Dimensions

• PDIP-32:
  • Body Length: 41.4 mm max
  • Body Width: 15.24 mm max
  • Lead Pitch: 2.54 mm
• PLCC-32:
  • Body Size: 13.97 mm x 13.97 mm
  • Lead Pitch: 1.27 mm

Pin Configuration

The 32-pin configuration typically includes:

• Address lines (A0-A16 for 128K addressing)
• Data lines (DQ0-DQ7)
• Chip Enable (CE)
• Output Enable (OE)
• Program Enable (PGM)
• Power Supply (VCC)
• Ground (GND)
• Programming Voltage (VPP)

Programming and Erasure

UV Erasure (UV Variant Only)

• Requires exposure to UV light at 253.7 nm wavelength
• Typical erasure dose: 15 J/cm²
• Erasure time: 15-20 minutes under standard UV EPROM eraser
• Window must be covered after programming to prevent accidental erasure

Programming Procedure

• VPP must be applied at +12V during programming
• Each byte requires approximately 100 µs programming time
• Programming verification should be performed after each byte
• OTP version cannot be erased after programming

Quality and Reliability

• Endurance: Minimum 100 programming cycles (UV version)
• Data retention: 10 years minimum at 55°C
• ESD protection: 2000V minimum on all pins (Human Body Model)
• Manufactured in qualified facilities with strict quality control

Ordering Information

The device is available with different ordering codes indicating speed grade, temperature range, and package type. Typical format:

M27W102-XXFY

• XX: Speed grade (e.g., 70 for 70 ns access time)
• F: Package type (P for PDIP, L for PLCC, etc.)
• Y: Temperature range (