M27C320 32 Mbit (4M x 8) OTP EPROM

Overview

The M27C320 is a high-performance 32 Megabit (4M x 8) One-Time Programmable (OTP) EPROM designed for applications requiring non-volatile memory storage. This device is fabricated with advanced CMOS technology, offering low power consumption and high reliability. The M27C320 is ideal for firmware storage, industrial control systems, and embedded applications where data permanence is critical.

With a fast access time and a wide voltage range, this EPROM provides a cost-effective solution for systems requiring permanent program storage. The device features a standard microprocessor interface, making it compatible with a wide range of systems.

Key Features

• High Density: 32 Mbit (4,194,304 x 8) organization
• OTP (One-Time Programmable): Programmable only once with permanent data retention
• Wide Voltage Range: Operates from 4.5V to 5.5V
• Fast Access Time: 70 ns, 90 ns, and 120 ns speed grades available
• Low Power Consumption: Active current of 30 mA (typical), standby current of 100 µA (max)
• CMOS Technology: High-speed, low-power operation
• Standard Control Interface: Compatible with microprocessor systems
• Three-State Outputs: For easy bus interfacing
• Programmable Security Code: Optional security feature to protect firmware
• Industrial Temperature Range: -40°C to +85°C operation

Applications

The M27C320 is suitable for a variety of applications requiring non-volatile memory storage, including:

• Embedded Systems: Firmware storage for microcontrollers and processors
• Industrial Control: Program storage for PLCs and automation equipment
• Telecommunications: Code storage in networking devices
• Automotive Electronics: Critical firmware storage in engine control units
• Medical Equipment: Reliable program storage in diagnostic devices
• Consumer Electronics: Firmware in set-top boxes and gaming systems
• Legacy System Upgrades: Replacement for older EPROM devices

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
• Storage Temperature: -65°C to +150°C
• Operating Temperature: -40°C to +85°C

DC Characteristics (T_A = -40°C to +85°C, V_CC = 5V ± 10%)

• Input High Voltage (V_IH): 2.0V min
• Input Low Voltage (V_IL): 0.8V max
• Output High Voltage (V_OH): 2.4V min (I_OH = -2.0 mA)
• Output Low Voltage (V_OL): 0.45V max (I_OL = 2.1 mA)
• Supply Current (Active): 30 mA typical, 50 mA max
• Supply Current (Standby): 100 µA max

AC Characteristics

• Address Access Time (t_ACC): 70 ns, 90 ns, or 120 ns (speed grade dependent)
• Chip Enable Access Time (t_CE): 70 ns, 90 ns, or 120 ns
• Output Enable Access Time (t_OE): 35 ns max
• Read Cycle Time (t_RC): 70 ns, 90 ns, or 120 ns
• Chip Enable to Power Down (t_DF): 0 ns min

Package Information

The M27C320 is available in multiple package options to suit different application requirements:

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

• Package Code: P032
• Dimensions: 15.24mm x 42.04mm (body)
• Pin Spacing: 2.54mm (100 mil) row spacing
• Lead Count: 32
• Operating Temperature: -40°C to +85°C

32-Pin Plastic Leaded Chip Carrier (PLCC)

• Package Code: L032
• Dimensions: 13.97mm x 13.97mm (body)
• Lead Pitch: 1.27mm (50 mil)
• Lead Count: 32
• Operating Temperature: -40°C to +85°C

32-Pin Thin Small Outline Package (TSOP)

• Package Code: T032
• Dimensions: 8mm x 20mm (body)
• Lead Pitch: 0.8mm
• Lead Count: 32
• Operating Temperature: -40°C to +85°C

Programming Characteristics

The M27C320 requires a standard EPROM programmer for programming:

• Programming Voltage (V_PP): 12.5V ± 0.5V
• Programming Algorithm: Intelligent programming with verification
• Programming Time: 100 µs per byte (typical)
• Programming Temperature: 0°C to +45°C recommended
• Data Retention: Minimum 10 years at 55°C

Ordering Information

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

• M27C320-70F1: 70 ns access time, PDIP package
• M27C320-90F1: 90 ns access time,