The AMD AM27C128-120DI is a 128K (16K x 8) CMOS EPROM (Erasable Programmable Read-Only Memory) device. It's a non-volatile memory solution commonly used in embedded systems for storing firmware, boot code, and other critical data that needs to be retained even when power is removed.

Applications:

• Embedded systems
• Microcontroller firmware storage
• Boot ROMs
• Industrial control equipment
• Networking devices
• Programmable logic controllers (PLCs)
• Aerospace applications

Features:

• 128K (16K x 8) memory organization
• CMOS technology for low power consumption
• Fast access time (120ns)
• Single 5V power supply
• Programmable and erasable
• TTL compatible inputs and outputs
• Three-state output

Benefits:

• Non-volatile storage ensures data retention without power
• Fast access time allows for quick data retrieval
• Low power consumption extends battery life in portable applications
• Erasability enables code updates and modifications
• TTL compatibility simplifies interfacing with other logic devices

Additional Details:

The AM27C128-120DI is erased by exposing the die to ultraviolet light through a transparent window. The data is then programmed into the EPROM using an EPROM programmer. The '120' in the part number indicates the access time of 120 nanoseconds. The device operates from a single 5V power supply and is available in a DIP (Dual In-line Package). Its three-state output allows multiple devices to share the same bus.

This EPROM is suitable for applications where code or data needs to be stored persistently and occasionally updated. The fast access time ensures that the microcontroller or processor can quickly retrieve the stored information. The use of CMOS technology results in low power consumption, making it suitable for applications where power is a concern. The AMD AM27C128-120DI offers reliable non-volatile storage and provides a cost-effective solution for storing firmware and other critical data in embedded systems. The erasability allows for easy modification and updates to the stored data, which is beneficial during development and testing. The three-state outputs provide flexibility in system design by enabling the use of multiple memory devices on a shared bus. Furthermore, the device’s wide operating temperature range makes it suitable for use in industrial and harsh environments. The device is well-suited for applications needing reliable, non-volatile, and easily updatable memory.