AT27C2048-12JI

Product Overview

Category

AT27C2048-12JI belongs to the category of programmable read-only memory (PROM) chips.

Use

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

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C2048-12JI has a capacity of 2,048 kilobits (256 kilobytes).
• Fast access time: It operates at a speed of 120 nanoseconds, allowing for quick retrieval of data.
• Low power consumption: The chip is designed to consume minimal power during operation.
• Durable: It can withstand multiple read operations without degradation.

Package

The AT27C2048-12JI is available in a 32-pin plastic dual in-line package (PDIP).

Essence

The essence of this PROM chip lies in its ability to store data permanently, making it ideal for applications where non-volatile memory is required.

Packaging/Quantity

The AT27C2048-12JI is typically packaged in tubes or trays, with each tube or tray containing a specific quantity of chips. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Memory Capacity: 2,048 kilobits (256 kilobytes)
• Access Time: 120 nanoseconds
• Supply Voltage: 5V ±10%
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL

Detailed Pin Configuration

The AT27C2048-12JI chip has a total of 32 pins, which are assigned specific functions. The pin configuration is as follows:

1. A16
2. A15
3. A12
4. A7
5. A6
6. A5
7. A4
8. A3
9. A2
10. A1
11. A0
12. E (Chip Enable)
13. G (Output Enable)
14. VCC (+5V Power Supply)
15. Q7
16. Q6
17. Q5
18. Q4
19. Q3
20. Q2
21. Q1
22. Q0
23. VSS (Ground)
24. CE (Chip Erase)
25. OE (Output Enable)
26. WE (Write Enable)
27. A14
28. A13
29. A8
30. A9
31. A11
32. A10

Functional Features

• Non-volatile storage: The AT27C2048-12JI retains data even when power is removed.
• High-speed access: With an access time of 120 nanoseconds, it allows for quick retrieval of stored data.
• Easy integration: The chip can be easily interfaced with various microcontrollers and electronic devices.
• Low power consumption: It operates efficiently with minimal power requirements.

Advantages and Disadvantages

Advantages

• Permanent data storage: The data stored in the chip remains intact even without power.
• Fast access time: Allows for quick retrieval of information.
• Compatibility: Can be easily integrated into existing systems.
• Durable: Withstands multiple read operations without degradation.

Disadvantages

• Limited write capability: The data cannot be modified or erased once programmed.
• Relatively small storage capacity compared to other memory technologies.

Working Principles

The AT27C2048-12JI uses a technology called floating-gate MOSFET to store data. When programming the chip, electrical charges are trapped in the floating gate, altering the transistor's behavior and storing the desired data. The stored data can be read by applying appropriate voltage levels to the chip's pins.

Detailed Application Field Plans

The AT27C2048-12JI finds applications in various fields, including: 1. Embedded systems: Used for firmware storage in microcontrollers. 2. Computer peripherals: Stores configuration data for devices like printers and scanners. 3. Automotive electronics: Used for storing calibration data in engine control units (ECUs). 4. Consumer electronics: Used in devices like gaming consoles and set-top boxes for firmware storage.

Detailed and Complete Alternative Models

1. AT27C1024-15PU: 1-megabit PROM chip with an access time of 150 nanoseconds.
2. AT27LV010A-12JC: 1-megabit low-voltage PROM chip with an access time of 120 nanoseconds.
3. AT28C64B-15PU: 64-kilobit EEPROM chip with an access time of 150 nanoseconds.

These alternative models offer different