AT27C256R-70PU

This product is a One-Time Programmable (OTP) memory module with a capacity of 32Kx8 and is commonly used for storing data in electronic devices
3,413 有效庫存

AT27C256R-70PU

有效庫存3,413

This product is a One-Time Programmable (OTP) memory module with a capacity of 32Kx8 and is commonly used for storing data in electronic devices

  • 製造商零件號 # : AT27C256R-70PU

  • 包裝/封裝: PDIP-28

  • 製造商: Microchip

  • 產品分類 : Memory

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AT27C256R-70PU 數據表
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詳細說明

AT27C256R-70PU by Microchip is a top-notch One Time Programmable EPROM that offers exceptional performance and exceptional power efficiency. Its 256-Kbit capacity, organized as 32-Kbit x 8, provides ample storage for various applications. Operating on a single 5V power supply, it boasts a low power consumption of 8 mA in active mode and less than 10 μA in standby mode. This makes it an energy-efficient choice for users looking to minimize power usage. With a fast access time of less than 45 ns, it eliminates the need for speed-reducing WAIT states on high-performance microprocessor systems, ensuring seamless operation

主要特徵

  • The product features a high-speed programming algorithm
  • It operates within a supply voltage range of 4.5V-5.5V
  • The IC offers efficient use and fast access time of 70ns
  • AT27C256R-70PU is implemented in a 28-pin DIP package
  • The EPROM IC has a storage capacity of 256K (32K x 8)
  • The product is suitable for one-time programmable applications
      • The product features a high-speed programming algorithm
      • It operates within a supply voltage range of 4.5V-5.5V
      • The IC offers efficient use and fast access time of 70ns

應用

  • AT27C256R-70PU: Essential for microcontrollers
  • Highly reliable memory for embedded systems
  • AT27C256R-70PU: Ideal for firmware storage

規格

以下是所選零件的基本參數，涉及零件的特性及其所屬類別。

Product Category ! EPROM RoHS Details
Mounting Style Through Hole Package / Case PDIP-28
Type OTP Memory Size ! 256 kbit
Organization 32 k x 8 Interface Type Parallel
Operating Supply Current 100 uA Programming Voltage ! 13 V
Supply Voltage - Max 5.5 V Supply Voltage - Min 4.5 V
Minimum Operating Temperature - 40 C Maximum Operating Temperature ! + 85 C
Series AT27C256R Access Time 70 ns
Brand Microchip Technology Moisture Sensitive Yes
Operating Supply Voltage ! 5 V Output Enable Access Time 30 ns
Product Type ! EPROM Factory Pack Quantity 14
Subcategory Memory & Data Storage Unit Weight 0.143449 oz

數據表 PDF

數據表記錄了器件的特性、絕對最大額定值、應用等，這對於作為器件特定應用的整體指南大有裨益。

初步規格 AT27C256R-70PU PDF 下載

常見問題解答

What is AT27C256R-70PU?

The AT27C256R-70PU is a 256K (32K x 8) OTP EPROM (Electrically Programmable Read-Only Memory) integrated circuit manufactured by Microchip Technology. It is designed for applications that require non-volatile, read-only memory storage with a capacity of 256 kilobits.

How Does AT27C256R-70PU Work?

The AT27C256R-70PU operates as a one-time programmable memory device where the data is written or programmed into the memory cells during manufacturing using special programming equipment. Once programmed, the data becomes non-volatile and can be read multiple times. The device retains the programmed data even when power is removed.

How Many Pins does AT27C256R-70PU have and What are the Functions of the Pinout Configuration?

The AT27C256R-70PU is typically available in a 28-pin DIP (Dual Inline Package) or a 32-lead PLCC (Plastic Leaded Chip Carrier) package. The pinout configuration includes:

  • A0-A14: Address input pins for selecting memory locations.
  • DQ0-DQ7: Data input/output pins for reading data from the memory.
  • CE (Chip Enable), OE (Output Enable), WE (Write Enable): Control pins for enabling memory operations.
  • VCC: Power supply pin.
  • GND: Ground connection.

What are the Pros and Cons of AT27C256R-70PU?

Pros:

  • Non-Volatile Storage: Retains data even when power is removed, ideal for firmware and configuration storage.
  • Permanent Programming: Once programmed, the data cannot be easily changed, providing security for critical information.
  • Reliability: OTP EPROMs like the AT27C256R-70PU offer high reliability and endurance.
  • Wide Operating Voltage Range: Can typically operate at a wide range of voltages, enhancing compatibility.
  • Cost-Effective: Offers a cost-effective solution for read-only memory applications.

Cons:

  • Limited Write Capability: Data can only be programmed once, limiting flexibility for updates.
  • Programmability Constraints: Requires special programming equipment during manufacturing, which may add complexity to the production process.
  • Physical Size: Depending on the package, the IC may occupy significant board space compared to newer non-volatile memory technologies.

Are There Any Equivalents/Alternatives to AT27C256R-70PU for Recommendation?

  • The AT28C256 from Microchip Technology is a similar 256K OTP EPROM with comparable features.
  • Alternatives to the AT27C256R-70PU include the M27C256B from STMicroelectronics and the NM27C256 from Texas Instruments.

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