Overview
The M27C4002-70C6 is a 4 Mbit EPROM (Erasable Programmable Read-Only Memory) produced by STMicroelectronics. It is available in two main types: UV (ultra violet erase) and OTP (one time programmable). This device is organized as 262,144 words of 16 bits, making it ideal for microprocessor systems that require large programs.
The M27C4002 is offered in various packages, including FDIP40W (window ceramic frit-seal package), PDIP40, PLCC44, and TSOP40 (10 x 20 mm). The UV erasable versions feature transparent lids that allow the chip to be exposed to ultraviolet light for erasure, while the OTP versions are suitable for applications where the content is programmed only once and erasure is not required.
STMicroelectronics also offers the M27C4002 in ECOPACK® packages, which are lead-free and comply with JEDEC Standard JESD97, meeting environmental requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Capacity | 4 Mbit (256K x 16) | |
| Supply Voltage for Read Operations | 5V ± 10% | V |
| Access Time | 70ns | ns |
| Active Current at 5MHz | 50mA | mA |
| Standby Current | 100µA | µA |
| Programming Voltage | 12.75V ± 0.25V | V |
| Programming Time per Word | 100µs | µs |
| Ambient Operating Temperature | –40 to 125°C | °C |
| Storage Temperature | –65 to 150°C | °C |
Key Features
- High Speed Access Time: 70ns, making it suitable for high-speed applications.
- Low Power Consumption: Active current of 50mA at 5MHz and standby current of 100µA.
- UV Erasable and OTP Options: Available in both UV erasable and one-time programmable versions.
- Electronic Signature: Allows for automated programming by reading out a binary code that identifies the manufacturer and device type.
- Two-Line Output Control: Features a two-line control function to minimize memory power dissipation and prevent output bus contention.
- ECOPACK® Packages: Lead-free packages that comply with environmental standards.
Applications
The M27C4002 is ideally suited for microprocessor systems that require large programs. It is commonly used in various applications such as:
- Embedded systems requiring significant program storage.
- Industrial control systems.
- Aerospace and defense systems where reliability and performance are critical.
- Automotive systems that need robust and high-capacity memory solutions.
Q & A
- What is the capacity of the M27C4002 EPROM?
The M27C4002 has a capacity of 4 Mbit, organized as 262,144 words of 16 bits.
- What are the different package options available for the M27C4002?
The M27C4002 is available in FDIP40W, PDIP40, PLCC44, and TSOP40 (10 x 20 mm) packages.
- What is the access time of the M27C4002-70C6?
The access time of the M27C4002-70C6 is 70ns.
- How does the standby mode affect the M27C4002?
In standby mode, the supply current reduces to 100µA, and the outputs are in a high impedance state.
- What is the programming voltage and time for the M27C4002?
The programming voltage is 12.75V ± 0.25V, and the programming time per word is 100µs.
- What is the electronic signature feature used for?
The electronic signature feature allows automated programming equipment to identify the device and match it with the corresponding programming algorithm.
- Is the M27C4002 lead-free?
Yes, the M27C4002 is available in ECOPACK® packages, which are lead-free and comply with environmental standards.
- What are the typical applications of the M27C4002?
The M27C4002 is used in microprocessor systems, embedded systems, industrial control systems, aerospace, defense, and automotive systems.
- How does the two-line output control function work?
The two-line control function uses Chip Enable (E) and Output Enable (G) to minimize power dissipation and prevent output bus contention, especially in larger memory arrays.
- What are the maximum ratings for the M27C4002?
The maximum ratings include ambient operating temperature of –40 to 125°C, storage temperature of –65 to 150°C, and specific voltage limits for inputs and outputs as detailed in the datasheet.
