Overview
The M27C801-90F1 is an 8 Mbit EPROM (Erasable Programmable Read-Only Memory) produced by STMicroelectronics. This device is available in two main types: UV (ultra violet erase) and OTP (one time programmable). It is organized as 1,048,576 by 8 bits, making it suitable for applications requiring fast turn-around and pattern experimentation. The M27C801 is offered in various packages, including FDIP32W (window ceramic frit-seal package), PDIP32, and PLCC32, with the FDIP32W allowing for UV erasure through its transparent lid.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Capacity | 8 Mbit (1Mb x 8) | - | - |
| Supply Voltage (Read) | 5 V ± 10% | - | V |
| Access Time | 55 ns (typical), 90 ns (maximum for M27C801-90F1) | - | ns |
| Active Current | 35 mA at 5 MHz | - | mA |
| Standby Current | 100 µA | - | µA |
| Programming Voltage | 12.75 V ± 0.25 V | - | V |
| Programming Time | 50 µs/word | - | µs |
| Electronic Signature | Manufacturer code: 20h, Device code: 42h | - | - |
| Ambient Operating Temperature | –40 to 125 °C | - | °C |
Key Features
- Fast Access Time: The M27C801 has an access time of 55 ns, making it suitable for high-speed applications.
- Low Power Consumption: It features low active and standby current, reducing power consumption in both active and standby modes.
- Programming Efficiency: The device supports efficient programming with a programming time of 50 µs per word and includes a Margin Mode to ensure reliable programming.
- Electronic Signature: The device has an Electronic Signature mode for easy identification by programming equipment.
- ECOPACK® Packages: Available in lead-free ECOPACK® packages, which meet environmental requirements and are compliant with JEDEC Standard JESD97.
- UV Erasable and OTP Options: Available in both UV erasable and one-time programmable versions, catering to different application needs.
Applications
The M27C801 is ideally suited for applications where fast turn-around and pattern experimentation are crucial. These include:
- Embedded Systems: Used in various embedded systems requiring non-volatile memory for code storage.
- Industrial Control Systems: Suitable for industrial control systems that need reliable and fast memory access.
- Aerospace and Defense: Can be used in aerospace and defense applications due to its robustness and reliability.
- Automotive Systems: Applicable in automotive systems that require high-speed and low-power memory solutions.
Q & A
- What is the capacity of the M27C801 EPROM?
The M27C801 has a capacity of 8 Mbit, organized as 1,048,576 by 8 bits.
- What are the different package options available for the M27C801?
The M27C801 is available in FDIP32W, PDIP32, and PLCC32 packages.
- What is the typical access time of the M27C801?
The typical access time is 55 ns, with a maximum of 90 ns for the M27C801-90F1 model.
- How does the Electronic Signature mode work?
The Electronic Signature mode allows reading out a binary code to identify the manufacturer and device type. It is activated by applying 11.5V to 12.5V on address line A9.
- What is the programming voltage and time for the M27C801?
The programming voltage is 12.75 V ± 0.25 V, and the programming time is 50 µs per word.
- What are the standby and active current consumption values?
The standby current is 100 µA, and the active current is 35 mA at 5 MHz.
- Is the M27C801 available in lead-free packages?
Yes, the M27C801 is available in lead-free ECOPACK® packages.
- How does the UV erasure process work for the M27C801?
UV erasure begins when the cells are exposed to light with wavelengths shorter than approximately 4000 Å. This can be achieved using UV light through the transparent lid of the FDIP32W package.
- What are the operating temperature ranges for the M27C801?
The ambient operating temperature range is –40 to 125 °C.
- Can multiple M27C801 devices be programmed in parallel?
Yes, multiple devices can be programmed in parallel with different data by controlling the Chip Enable (E) input.
