AT27C020-15PI

Product Overview

Category

AT27C020-15PI belongs to the category of programmable read-only memory (PROM) chips.

Use

This chip is commonly used for storing fixed data or program code that cannot be modified once programmed.

Characteristics

• Non-volatile: The stored data remains intact even when power is removed.
• High storage capacity: The AT27C020-15PI has a capacity of 2 megabits (256 kilobytes).
• Fast access time: It operates with a maximum access time of 150 nanoseconds.
• Low power consumption: The chip is designed to minimize power usage during operation.

Package

The AT27C020-15PI is available in a 32-pin plastic DIP (Dual In-line Package).

Essence

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

Packaging/Quantity

The AT27C020-15PI 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 supplier.

Specifications

• Memory Capacity: 2 Megabits (256 Kilobytes)
• Access Time: 150 Nanoseconds
• Supply Voltage: 5V ±10%
• Operating Temperature Range: -40°C to +85°C
• Input/Output Compatibility: TTL

Detailed Pin Configuration

The AT27C020-15PI has a total of 32 pins, which are assigned specific functions as follows:

1. A16: Address Input
2. A14: Address Input
3. A12: Address Input
4. A7: Address Input
5. A6: Address Input
6. A5: Address Input
7. A4: Address Input
8. A3: Address Input
9. A2: Address Input
10. A1: Address Input
11. A0: Address Input
12. E: Chip Enable Input
13. G: Output Enable Input
14. Vcc: Supply Voltage
15. Q7: Data Output
16. Q6: Data Output
17. Q5: Data Output
18. Q4: Data Output
19. Q3: Data Output
20. Q2: Data Output
21. Q1: Data Output
22. Q0: Data Output
23. Vss: Ground
24. NC: No Connection
25. A15: Address Input
26. A13: Address Input
27. A8: Address Input
28. A9: Address Input
29. A11: Address Input
30. A10: Address Input
31. OE: Output Enable Input
32. CE: Chip Enable Input

Functional Features

• Non-volatile storage: The AT27C020-15PI retains data even when power is removed.
• High-speed access: It provides fast access times for efficient data retrieval.
• Easy integration: The chip can be easily integrated into existing electronic systems.
• Low power consumption: Designed to minimize power usage, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• Reliable data storage: The non-volatile nature of the chip ensures data integrity.
• Fast access time: Allows for quick retrieval of stored information.
• Versatile application: Suitable for a wide range of applications requiring fixed data storage.
• Low power consumption: Ideal for energy-efficient devices.

Disadvantages

• Limited reprogrammability: Once programmed, the data cannot be modified or erased.
• Higher cost compared to other memory technologies with similar capacities.

Working Principles

The AT27C020-15PI operates based on the principle of electrical charge trapping. During programming, a high voltage is applied to specific memory cells, causing electrons to be trapped in the floating gate. This trapped charge determines the stored data. When reading, the chip applies appropriate voltages to access and retrieve the stored information.

Detailed Application Field Plans

The AT27C020-15PI finds applications in various fields, including:

1. Embedded Systems: Used for storing firmware or boot code in microcontrollers and microprocessors.
2. Automotive Electronics: Employed for storing critical data such as calibration tables or configuration settings.
3. Industrial Control Systems: Utilized for storing fixed program code in PLCs (Programmable Logic Controllers) or other control devices.
4. Consumer Electronics: Integrated into devices requiring non-volatile storage, such as gaming consoles or set-top boxes.

Detailed and Complete Alternative Models

1. AT27C010-15PI: A similar PROM chip with half the capacity (1 Megabit).
2. AT27C040-15PI: A higher-capacity PROM chip with 4 Megab