Overview
The M27C256B-10B6 is a 256 Kbit 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 32,768 by 8 bits, making it suitable for microprocessor systems. The EPROM is offered in various packages, including FDIP28W (window ceramic frit-seal package), PDIP28, and PLCC32, with the FDIP28W allowing for UV erasure and the others being one-time programmable. The device is also available in ECOPACK® packages, which are lead-free and comply with environmental standards.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Memory Size | 256 Kbit (32Kb × 8) | - |
| Supply Voltage (Read) | 5V ± 10% | - |
| Access Time | 45ns (minimum) | - |
| Active Current | 30mA at 5MHz | - |
| Standby Current | 100µA | - |
| Programming Voltage | 12.75V ± 0.25V | - |
| Programming Time | 100µs/Word | - |
| Electronic Signature | Manufacturer Code: 20h, Device Code: 8Dh | - |
| Packages | FDIP28W, PDIP28, PLCC32 | - |
Key Features
- Low Power Consumption: Active current of 30mA at 5MHz and standby current of 100µA.
- Two-Line Output Control: Allows for efficient use in larger memory arrays, minimizing power dissipation and preventing output bus contention.
- Electronic Signature: Enables the device to be identified by its manufacturer and type, useful for programming equipment.
- ECOPACK® Packages: Lead-free and compliant with environmental standards, marked with JEDEC Standard JESD97.
- Programming and Erasure: Supports UV erasure for FDIP28W packages and one-time programming for PDIP28 and PLCC32 packages.
Applications
The M27C256B-10B6 is ideally suited for microprocessor systems, embedded systems, and other applications requiring non-volatile memory. It can be used in various fields such as industrial control systems, automotive electronics, and consumer electronics where reliable and programmable memory is necessary.
Q & A
- What is the memory size of the M27C256B-10B6?
256 Kbit (32Kb × 8).
- What are the different package types available for the M27C256B?
FDIP28W, PDIP28, and PLCC32.
- How is the device erased?
The FDIP28W package can be erased using ultra violet light, while PDIP28 and PLCC32 packages are one-time programmable.
- What is the access time of the M27C256B-10B6?
45ns (minimum).
- What is the standby current of the device?
100µA.
- How does the two-line output control function work?
The two-line control function uses Chip Enable (E) and Output Enable (G) to manage memory power dissipation and prevent output bus contention.
- What is the programming voltage and time for the M27C256B-10B6?
Programming voltage: 12.75V ± 0.25V, Programming time: 100µs/Word.
- What is the electronic signature feature used for?
The electronic signature feature allows the device to be identified by its manufacturer and type, useful for programming equipment.
- Are the packages of the M27C256B-10B6 lead-free?
- What are the typical operating conditions for the M27C256B-10B6?
The device operates with a supply voltage of 5V ± 10% and can function over a temperature range of -40 to 85°C).
