M27V201 2 Mbit EPROM Technical Summary

Overview

The M27V201 is a low-voltage 2 Mbit (256K x 8) EPROM available in two variants: UV-erasable (ultraviolet erase) and OTP (One-Time Programmable). This component is designed for applications requiring non-volatile memory with reliable data retention and fast access times. The M27V201 operates at a low voltage, making it suitable for power-sensitive designs while maintaining compatibility with standard EPROM interfaces.

The device is organized as 256K words of 8 bits each, providing flexible addressing and efficient data storage. Its architecture ensures compatibility with a wide range of microcontrollers and microprocessor systems, making it a versatile choice for embedded systems and legacy applications.

Features

• Memory Capacity: 2 Mbit (256K x 8 organization)
• Voltage Range: Low-voltage operation (specific range depends on variant)
• Access Time: Fast read access times, suitable for high-performance systems
• Programming Voltage: Single voltage programming (no additional high voltage required during write operations)
• Two Variants Available:
  • UV-erasable (ultraviolet light erase)
  • OTP (One-Time Programmable) for permanent data storage
• Standard EPROM Interface: Compatible with industry-standard control signals
• Wide Temperature Range: Operates across industrial temperature ranges
• High Reliability: Excellent data retention characteristics
• CMOS Technology: Low power consumption compared to NMOS alternatives

Applications

The M27V201 is suitable for a wide range of applications requiring non-volatile memory storage, including:

• Embedded Systems: Firmware storage for microcontroller-based designs
• Industrial Control Systems: Program storage for PLCs and control units
• Automotive Electronics: Engine control units and dashboard systems
• Medical Equipment: Critical parameter storage in medical devices
• Telecommunications: Configuration data storage in networking equipment
• Legacy System Maintenance: Replacement for older EPROM designs
• Test and Measurement Equipment: Calibration data and instrument firmware

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage: -0.3V to +7V
• Input Voltage: -0.3V to V_CC + 0.3V
• Output Voltage: -0.3V to V_CC + 0.3V
• Storage Temperature: -65°C to +150°C
• Operating Temperature: -40°C to +85°C (industrial grade)

DC Characteristics

• Supply Current (Active): 30 mA max (at 5 MHz)
• Supply Current (Standby): 100 µA max
• Input Leakage Current: ±1 µA max
• Output Leakage Current: ±1 µA max
• Input Low Voltage: 0.8V max
• Input High Voltage: 2.0V min

AC Characteristics

• Address Access Time: 70 ns max
• Chip Enable Access Time: 70 ns max
• Output Enable Access Time: 30 ns max
• Read Cycle Time: 70 ns
• Write Pulse Width: 50 ms min (programming)
• Programming Time: 100 µs per byte (typical)

Package Information

The M27V201 is available in multiple package options to suit different application requirements:

Standard Packages

• PDIP (Plastic Dual In-line Package):
  • 32-pin configuration
  • 600 mil body width
  • Through-hole mounting
  • Standard window for UV erasure (UV variant only)
• PLCC (Plastic Leaded Chip Carrier):
  • 32-lead configuration
  • Square format (1.27 mm lead pitch)
  • Surface mount package
  • JEDEC standard outline
• TSOP (Thin Small Outline Package):
  • 32-pin configuration
  • Thin profile (1.0 mm typical)
  • Surface mount package
  • Space-saving design

Package Dimensions

• PDIP-32:
  • Length: 41.91 mm max
  • Width: 15.24 mm max
  • Height: 4.95 mm max
• PLCC-32:
  • Body Size: 13.97 mm x 13.97 mm
  • Height: 3.68 mm max
  • Lead Pitch: 1.27 mm
• TSOP-32:
  • Body Size: 20.00 mm x 10.16 mm
  • Height: 1.20 mm max
  • Lead Pitch: 0.80 mm

Programming and Erasure

UV Erasure (UV Variant Only)

• Erasure Method: Exposure to UV light (2537 Å wavelength)
• Erasure Time: 15-20 minutes (typical at 12,000 µW/cm²)
• Window Material: Fused quartz for optimal UV transmission
• Erasure Endurance: Minimum 100 erase/program cycles

Programming Characteristics

• Programming Algorithm: Standard EPROM programming sequence
• Programming Voltage: V_PP = 12.5V ± 0.5V
• Programming Current: 30 mA max per pin
• Program/Verify Cycles: Multiple verify steps ensure data integrity
• Data Retention: >10 years at 85°C (100 years at 25°C)

Ordering Information

The M27V201 is available in different speed grades and package options. The complete ordering code includes:

• Memory density identifier (M