仕様
| 属性 | 値 |
| Package | Tube |
| ProductStatus | Obsolete |
| MemoryType | Non-Volatile |
| MemoryFormat | EPROM |
| Technology | EPROM - OTP |
| MemorySize | 256Kb (32K x 8) |
| MemoryInterface | Parallel |
| AccessTime | 120 ns |
| Voltage-Supply | 4.5V ~ 5.5V |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 32-LCC (J-Lead) |
概要
Description
The M27C256B-12C6 is a 256-kilobit UV EPROM memory chip, organized as 32,768 words by 8 bits. It’s designed for use in systems where data integrity and storage are critical. The "12C6" part of the designation typically refers to the access time and package type, with "12" indicating a 120-nanosecond access time, which is suitable for high-speed applications.
This chip is programmed through a process known as "burning" using a PROM programmer, where data is written to the chip electrically. Data can be erased by exposing the chip to ultraviolet light, allowing it to be reprogrammed. It operates within a voltage range of 4.5V to 5.5V, making it compatible with most digital circuit interfaces.
The M27C256B-12C6 is encapsulated in a 28-pin dual in-line package (DIP), making it easy to integrate into circuit boards. Its durability and stability make it suitable for applications such as firmware storage, where data is infrequently updated but requires long-term retention.
This chip is programmed through a process known as "burning" using a PROM programmer, where data is written to the chip electrically. Data can be erased by exposing the chip to ultraviolet light, allowing it to be reprogrammed. It operates within a voltage range of 4.5V to 5.5V, making it compatible with most digital circuit interfaces.
The M27C256B-12C6 is encapsulated in a 28-pin dual in-line package (DIP), making it easy to integrate into circuit boards. Its durability and stability make it suitable for applications such as firmware storage, where data is infrequently updated but requires long-term retention.
Equivalent
The M27C256B-12C6 is a 256Kb (32K x 8) UV EPROM with a 120 ns access time. Equivalent products include:
1. Intel D27C256
2. AMD AM27C256
3. Microchip AT27C256R
4. Toshiba TC57256AD
5. NEC uPD27C256
These alternatives serve similar functions and can often be used interchangeably, but always check the datasheets for compatibility in your specific application.
1. Intel D27C256
2. AMD AM27C256
3. Microchip AT27C256R
4. Toshiba TC57256AD
5. NEC uPD27C256
These alternatives serve similar functions and can often be used interchangeably, but always check the datasheets for compatibility in your specific application.
Features
The M27C256B-12C6 is a 256 Kbit UV EPROM with the following key features:
1. Organization: 32K x 8 bits.
2. Access Time: 120 ns.
3. Operating Voltage: Typically operates at 5 V.
4. Programming Voltage: 12.5 V for programming operations.
5. Data Retention: Offers data retention for over 10 years.
6. Endurance: Can be erased and reprogrammed more than 1,000 times.
7. Package: Available in a 28-pin DIP or PLCC package.
8. Erasure: Data can be erased by exposing the chip to ultraviolet light.
9. High-Speed Performance: Designed for applications that require fast data access.
10. Temperature Range: Operates within a commercial temperature range of 0°C to +70°C.
11. Low Power Consumption: Features low power consumption during both standby and active modes.
These attributes make the M27C256B-12C6 suitable for a wide range of applications, including code storage in embedded systems and other data retention applications where reprogramming flexibility is important.
1. Organization: 32K x 8 bits.
2. Access Time: 120 ns.
3. Operating Voltage: Typically operates at 5 V.
4. Programming Voltage: 12.5 V for programming operations.
5. Data Retention: Offers data retention for over 10 years.
6. Endurance: Can be erased and reprogrammed more than 1,000 times.
7. Package: Available in a 28-pin DIP or PLCC package.
8. Erasure: Data can be erased by exposing the chip to ultraviolet light.
9. High-Speed Performance: Designed for applications that require fast data access.
10. Temperature Range: Operates within a commercial temperature range of 0°C to +70°C.
11. Low Power Consumption: Features low power consumption during both standby and active modes.
These attributes make the M27C256B-12C6 suitable for a wide range of applications, including code storage in embedded systems and other data retention applications where reprogramming flexibility is important.
Pinout
The M27C256B-12C6 is a 32K x 8 (256 Kbit) UV EPROM (Erasable Programmable Read-Only Memory) with a 28-pin configuration. Here is a concise overview of its pin count and functions:
1. Pin Count: 28 pins
2. Pin Functions:
- A0-A14 (15 pins): Address pins used to select one of the 32,768 memory locations.
- Q0-Q7 (8 pins): Data output pins for accessing data stored in the memory.
- VCC (1 pin): Power supply pin (typically +5V).
- GND (1 pin): Ground connection.
- E̅ (1 pin): Chip Enable, active low, used to activate the device.
- G̅ (1 pin): Output Enable, active low, controls data output.
- P̅ (1 pin): Program pin, active low, used during the programming of the device.
The M27C256B-12C6 is used in various applications that require non-volatile storage, such as firmware or microcontroller programs, and can be erased using UV light for reprogramming.
1. Pin Count: 28 pins
2. Pin Functions:
- A0-A14 (15 pins): Address pins used to select one of the 32,768 memory locations.
- Q0-Q7 (8 pins): Data output pins for accessing data stored in the memory.
- VCC (1 pin): Power supply pin (typically +5V).
- GND (1 pin): Ground connection.
- E̅ (1 pin): Chip Enable, active low, used to activate the device.
- G̅ (1 pin): Output Enable, active low, controls data output.
- P̅ (1 pin): Program pin, active low, used during the programming of the device.
The M27C256B-12C6 is used in various applications that require non-volatile storage, such as firmware or microcontroller programs, and can be erased using UV light for reprogramming.
Manufacturer
The M27C256B-12C6 is manufactured by STMicroelectronics. STMicroelectronics is a global semiconductor company that designs, develops, manufactures, and markets a wide range of semiconductor products and solutions. The company serves various industries, including automotive, industrial, personal electronics, and communications equipment. STMicroelectronics is known for its expertise in semiconductor solutions, spanning from discrete components to complex microcontrollers and integrated circuits.
Application
The M27C256B-12C6 is a 256Kb UV EPROM memory chip commonly used in applications requiring stable, non-volatile memory storage. Key application areas include:
1. Embedded Systems: Used for storing firmware and software in microcontrollers.
2. Industrial Equipment: Retaining control programs and configuration settings.
3. Consumer Electronics: Used in older devices for software storage.
4. Automotive Systems: Storing calibration data and firmware in ECUs.
5. Telecommunications: Firmware storage in network and communication equipment.
6. Prototyping and Development: EPROM chips like this are used for testing and development before finalizing designs.
Its UV erasability feature allows for reprogramming during development cycles, making it versatile in various applications.
1. Embedded Systems: Used for storing firmware and software in microcontrollers.
2. Industrial Equipment: Retaining control programs and configuration settings.
3. Consumer Electronics: Used in older devices for software storage.
4. Automotive Systems: Storing calibration data and firmware in ECUs.
5. Telecommunications: Firmware storage in network and communication equipment.
6. Prototyping and Development: EPROM chips like this are used for testing and development before finalizing designs.
Its UV erasability feature allows for reprogramming during development cycles, making it versatile in various applications.
Package
The M27C256B-12C6 is an EPROM (Erasable Programmable Read-Only Memory) chip housed in a 28-pin DIP (Dual In-line Package) format.
