Overview
The M27C4001-80B1 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 524,288 by 8 bits, making it suitable for microprocessor systems that require large programs.
The M27C4001 is offered in various packages, including FDIP32W (window ceramic frit-seal package), PDIP32, PLCC32, and TSOP32 (8 x 20 mm). The FDIP32W package features a transparent lid for UV erasure, while the other packages are suitable for applications where the content is programmed only once and erasure is not required.
STMicroelectronics also offers the M27C4001 in ECOPACK® compliant versions, which are lead-free and meet environmental requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Memory Size | 4 Mbit (512Kb x 8) | |
| Supply Voltage (Read Operation) | 5V ± 10% | V |
| Access Time | 35ns (for -80B1 speed grade) | ns |
| Active Current | 30mA at 5MHz | mA |
| Standby Current | 100µA | µA |
| Programming Voltage | 12.75V ± 0.25V | V |
| Programming Time | 100µs/Word | µs |
| Ambient Operating Temperature | -40 to 125°C | °C |
| Storage Temperature | -65 to 150°C | °C |
Key Features
- Low Power Consumption: Active current of 30mA at 5MHz and standby current of 100µA.
- Fast Access Time: 35ns for the -80B1 speed grade.
- Programming and Erase Capabilities: UV erasable and OTP versions available.
- Electronic Signature: Allows reading of a binary code to identify the manufacturer and device type.
- Two Line Output Control: Features chip enable (E) and output enable (G) for efficient memory array management.
- ECOPACK Compliant: Lead-free packages meeting environmental requirements.
Applications
The M27C4001 is ideally suited for microprocessor systems that require large programs. It is commonly used in various applications such as:
- Embedded systems requiring non-volatile memory.
- Industrial control systems.
- Automotive electronics.
- Consumer electronics.
- Any system needing programmable read-only memory.
Q & A
- What is the memory size of the M27C4001?
The M27C4001 has a memory size of 4 Mbit, organized as 524,288 by 8 bits.
- What are the different package types available for the M27C4001?
The M27C4001 is available in FDIP32W, PDIP32, PLCC32, and TSOP32 (8 x 20 mm) packages.
- What is the access time for the M27C4001-80B1?
The access time for the M27C4001-80B1 is 35ns.
- How does the standby mode work on the M27C4001?
The M27C4001 enters standby mode when a CMOS high signal is applied to the E input, reducing the supply current to 100µA.
- What is the programming voltage for the M27C4001?
The programming voltage for the M27C4001 is 12.75V ± 0.25V.
- How is the electronic signature mode activated on the M27C4001?
The electronic signature mode is activated by forcing 11.5V to 12.5V on address line A9 with VPP = VCC = 5V.
- What are the environmental benefits of the ECOPACK compliant versions?
The ECOPACK compliant versions are lead-free and meet environmental requirements as specified by STMicroelectronics.
- Can multiple M27C4001 devices be programmed in parallel?
Yes, multiple M27C4001 devices can be programmed in parallel with different data by ensuring that the E input is low for the device being programmed while keeping it high for the others.
- What is the purpose of the two line output control function?
The two line output control function allows for efficient memory array management by ensuring low power dissipation and preventing output bus contention.
- What are the typical applications of the M27C4001?
The M27C4001 is typically used in embedded systems, industrial control systems, automotive electronics, and consumer electronics where programmable read-only memory is required.
