AT27LV520-70XI

Product Overview

Category

AT27LV520-70XI belongs to the category of programmable read-only memory (PROM) chips.

Use

This product is primarily used for storing data that needs to be permanently written and cannot be modified or erased. It is commonly employed in various electronic devices, such as microcontrollers, computers, and consumer electronics.

Characteristics

• Non-volatile: The data stored in AT27LV520-70XI remains intact even when power is turned off.
• High storage capacity: This chip has a storage capacity of 520 kilobits.
• Low power consumption: AT27LV520-70XI operates on low power, making it suitable for battery-powered devices.
• Fast access time: With an access time of 70 nanoseconds, this PROM chip ensures quick retrieval of stored data.

Package and Quantity

AT27LV520-70XI is available in a standard 32-pin plastic dual in-line package (PDIP). Each package contains one chip.

Specifications

• Storage Capacity: 520 kilobits
• Access Time: 70 nanoseconds
• Supply Voltage: 5V
• Operating Temperature Range: -40°C to +85°C
• Package Type: 32-pin PDIP

Pin Configuration

The detailed pin configuration of AT27LV520-70XI is as follows:

```

Pin Name Description

1 A12 Address Input 2 A7 Address Input 3 A6 Address Input 4 A5 Address Input 5 A4 Address Input 6 A3 Address Input 7 A2 Address Input 8 A1 Address Input 9 A0 Address Input 10 CE Chip Enable Input 11 OE Output Enable Input 12 WE Write Enable Input 13 I/O0 Data Input/Output 14 I/O1 Data Input/Output 15 I/O2 Data Input/Output 16 VSS Ground 17 I/O3 Data Input/Output 18 I/O4 Data Input/Output 19 I/O5 Data Input/Output 20 I/O6 Data Input/Output 21 I/O7 Data Input/Output 22 NC No Connection 23 A8 Address Input 24 A9 Address Input 25 A11 Address Input 26 A10 Address Input 27 VCC Power Supply 28 CE1 Chip Enable Input 29 CE2 Chip Enable Input 30 CE3 Chip Enable Input 31 OE1 Output Enable Input 32 OE2 Output Enable Input ```

Functional Features

AT27LV520-70XI offers the following functional features:

• High-speed data access: The chip provides fast access to stored data with a low access time of 70 nanoseconds.
• Non-volatile storage: The data remains intact even when power is turned off, ensuring permanent storage.
• Easy integration: AT27LV520-70XI can be easily integrated into various electronic devices due to its standard pin configuration and package.

Advantages and Disadvantages

Advantages

• Non-volatile storage ensures data integrity.
• High storage capacity allows for storing large amounts of data.
• Low power consumption makes it suitable for battery-powered devices.
• Fast access time enables quick retrieval of data.

Disadvantages

• The data stored in AT27LV520-70XI cannot be modified or erased, limiting its flexibility compared to other memory technologies.
• Limited compatibility with certain devices due to its specific pin configuration.

Working Principles

AT27LV520-70XI operates based on the principle of electrically programmable read-only memory (EPROM). The data is written to the chip during the manufacturing process and remains permanently stored. When the chip receives a read command, it retrieves the stored data and outputs it through the data pins.

Application Field Plans

AT27LV520-70XI finds applications in various fields, including: 1. Microcontrollers: Used for storing firmware and program code. 2. Computers: Employed for storing system BIOS and firmware. 3. Consumer Electronics: Utilized for storing configuration data and firmware in devices like TVs, DVD players, and gaming consoles.

Alternative Models

The following alternative models can be considered as alternatives to AT27LV520-70XI: 1. AT28C64B-15PU: 64-kilobit electrically erasable PROM with a 150 nanosecond access time. 2. AT29C010A-12PC: 1-megabit electrically programmable flash memory with a 120 nanosecond access time. 3. AT49BV