Overview
The M27C256B-15C1 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 various microprocessor systems.
The M27C256B-15C1 features a range of packages, including FDIP28W (window ceramic frit-seal package), PDIP28, and PLCC32, catering to different application needs. The UV erase type allows for the erasure of the bit pattern using ultraviolet light, while the OTP type is programmed only once and does not require erasure.
Key Specifications
| Parameter | Value |
|---|---|
| Memory Size | 256 Kbit (32Kb x 8) |
| Supply Voltage (Read Operation) | 5V ± 10% |
| Access Time | 45ns (for -15C1 version) |
| Active Current | 30mA at 5MHz |
| Standby Current | 100µA |
| Programming Voltage | 12.75V ± 0.25V |
| Programming Time | 100µs/Word |
| Package Types | FDIP28W, PDIP28, PLCC32 |
| Manufacturer Code | 20h |
| Device Code | 8Dh |
Key Features
- Low Power Consumption: Active current of 30mA at 5MHz and standby current of 100µA.
- Fast Access Time: Access time of 45ns for the -15C1 version.
- Programming Flexibility: Programming voltage of 12.75V ± 0.25V and programming time of 100µs/Word.
- Electronic Signature: Manufacturer code (20h) and device code (8Dh) for identification.
- ECOPACK® Packages: Lead-free packages available, compliant with JEDEC Standard JESD97.
- Two-Line Output Control: Chip Enable (E) and Output Enable (G) for efficient memory array management.
Applications
The M27C256B-15C1 is ideally suited for microprocessor systems and can be used in a variety of applications, including:
- Embedded systems requiring non-volatile memory.
- Industrial control systems.
- Automotive electronics.
- Consumer electronics.
- Any system requiring programmable read-only memory.
Q & A
- What is the memory size of the M27C256B-15C1?
The memory size is 256 Kbit, organized as 32,768 by 8 bits.
- What are the different package types available for the M27C256B-15C1?
The device is available in FDIP28W, PDIP28, and PLCC32 packages.
- What is the access time for the M27C256B-15C1?
The access time is 45ns for the -15C1 version.
- How does the standby mode work on the M27C256B-15C1?
The device enters standby mode by applying a CMOS high signal to the E input, reducing the supply current to 100µA.
- What is the programming voltage and time for the M27C256B-15C1?
The programming voltage is 12.75V ± 0.25V, and the programming time is 100µs/Word.
- What is the electronic signature feature of the M27C256B-15C1?
The device has a manufacturer code (20h) and device code (8Dh) that can be read during Electronic Signature mode.
- Are the packages of the M27C256B-15C1 lead-free?
- 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 arrays efficiently, ensuring low power dissipation and preventing output bus contention.
- What is the purpose of the UV erase feature?
The UV erase feature allows the erasure of the bit pattern using ultraviolet light, enabling the device to be reprogrammed.
- Can the M27C256B-15C1 be used in industrial control systems?
