M27V401 4 Mbit EPROM Technical Summary

Overview

The M27V401 is a low-voltage 4 Mbit (512K x 8) EPROM available in two variants: UV (ultra-violet erase) and OTP (one-time programmable). This component is designed for applications requiring non-volatile memory storage with reliable performance and ease of integration. The M27V401 is fabricated using advanced CMOS technology, ensuring low power consumption while maintaining high-speed operation. Its architecture makes it suitable for embedded systems, industrial controls, and legacy applications where EPROM technology is preferred.

Features

• Memory Capacity: 4 Mbit (512K x 8 organization)
• Voltage Range: Low-voltage operation (specific range to be confirmed in datasheet)
• Variants: UV-erasable and OTP (one-time programmable) options
• High-Speed Access Time: Fast read access times for efficient system performance
• Low Power Consumption: Optimized for power-sensitive applications
• CMOS Technology: Ensures reliability and low standby current
• Wide Temperature Range: Suitable for industrial and automotive environments
• Standard Pinout: Compatible with industry-standard EPROM interfaces
• Programming Voltage: Supports standard programming voltage levels (details in datasheet)

Applications

The M27V401 is ideal for a variety of applications requiring non-volatile memory storage, including:

• Embedded Systems: Firmware storage for microcontrollers and legacy systems
• Industrial Controls: Program storage for PLCs and automation equipment
• Automotive Electronics: Code and parameter storage in automotive control units
• Medical Devices: Reliable memory for critical medical equipment
• Consumer Electronics: Firmware storage in appliances and entertainment systems
• Telecommunications: Boot code and configuration storage in networking hardware

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
• Output Voltage (V_OUT): -0.5V to V_CC + 0.5V
• Operating Temperature Range: -40°C to +85°C (industrial grade)
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_CC): 4.5V to 5.5V
• Input High Voltage (V_IH): 2.0V min
• Input Low Voltage (V_IL): 0.8V max
• Operating Temperature: 0°C to +70°C (commercial), -40°C to +85°C (industrial)

DC Characteristics

• Standby Current (I_SB): 10 µA max (typical)
• Active Current (I_CC): 30 mA max (at 5 MHz)
• Output High Voltage (V_OH): 2.4V min (at I_OH = -2.0 mA)
• Output Low Voltage (V_OL): 0.4V max (at I_OL = 2.0 mA)

AC Characteristics

• Read Access Time (t_ACC): 70 ns max
• Chip Enable Access Time (t_CE): 70 ns max
• Output Enable Access Time (t_OE): 30 ns max
• Write Pulse Width (t_WP): 50 ns min (programming)

Package Information

The M27V401 is available in multiple package options to suit different application requirements. Below are the details of the most common packages:

32-Pin Plastic Dual In-Line Package (PDIP)

• Package Code: PDIP-32
• Dimensions: 15.24 mm x 7.62 mm (body)
• Pin Pitch: 2.54 mm
• Lead Material: Copper alloy
• RoHS Compliance: Yes

32-Pin Plastic Leaded Chip Carrier (PLCC)

• Package Code: PLCC-32
• Dimensions: 13.97 mm x 13.97 mm (body)
• Pin Pitch: 1.27 mm
• Lead Material: Copper alloy
• RoHS Compliance: Yes

32-Pin Thin Small Outline Package (TSOP)

• Package Code: TSOP-32
• Dimensions: 20.00 mm x 8.70 mm (body)
• Pin Pitch: 0.80 mm
• Lead Material: Copper alloy
• RoHS Compliance: Yes

Programming and Erasure

UV Erasure (UV Variant)

The UV-erasable version of the M27V401 requires exposure to ultraviolet light for erasure. Key parameters include:

• Wavelength: 253.7 nm
• Erase Time: 15-20 minutes (typical at 12,000 µW/cm²)
• Window Material: Fused quartz

Programming (OTP Variant)

The OTP version is programmed once and cannot be erased. Programming parameters include:

• Programming Voltage (V_PP): 12.5V ± 0.5V
• Programming Algorithm: Standard EPROM programming sequence
• Program Pulse Width: 50 µs per byte (typical)

Conclusion

The M27V401 4 Mbit EPROM is a versatile and reliable memory solution for applications requiring non-volatile storage. With its low-voltage operation, high-speed access, and multiple package options, it meets the needs of diverse industries. Whether used in industrial controls, automotive systems, or consumer electronics, the M27V401 delivers consistent performance and durability.