AT49F512-70TU

Memory IC Overview

The AT49F512-70TU is a 5-volt-only in-system programmable and erasable Flash memory device manufactured by Microchip Technology. It provides 512K bits of storage organized as 65,536 words by 8 bits. The component features a 70 ns access time and operates within an industrial temperature range of -40°C to +85°C. It utilizes a 32-lead Thin Small Outline Package (TSOP). Key electrical characteristics include a maximum active current of 40 mA and a standby current of 300 µA.

Memory IC Feature Summary

• Supports single 5V voltage operation for both reading and reprogramming without requiring high input voltages.
• Includes an optional 8K byte boot block section with a hardware write lockout feature to protect secure code.
• Provides DATA polling and Toggle Bit mechanisms to indicate the completion of program or erase cycles.
• Features hardware data protection against inadvertent programming via VCC sense, program inhibit, and noise filtering.

Memory IC Applications

• In-system programming applications requiring nonvolatile storage
• Systems utilizing dedicated boot blocks for secure code execution
• Industrial embedded designs operating within commercial temperature ranges

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and speed grade. Confirm the manufacturer origin, as Atmel was acquired by Microchip Technology. Ensure the component meets environmental specifications if lead-free packaging is mandatory for the assembly process.

Memory IC Selection Notes

Select this component when a 512K bit capacity with 5V-only operation is required. Consider the 70 ns access time for system timing constraints. Evaluate the need for the boot block lockout feature if code security is a priority. Compare power consumption requirements against the specified active and standby currents.

Memory IC Part Context

This part belongs to the AT49F512 series of 5-volt Flash memories. It is designed for applications needing reliable nonvolatile storage with byte-by-byte programming capabilities. The device supports standard parallel interface protocols compatible with EPROM-like operations.

Memory IC Replacement Considerations

Check for AT49F512-55TU for faster 55 ns access times in the same TSOP package. Verify compatibility with other 512K-bit Flash devices from different manufacturers regarding pinouts and command sets.

Memory IC FAQ

How is the end of a program cycle detected?

The end of a program cycle can be detected using DATA polling on I/O7 or by monitoring the Toggle Bit on I/O6.

What is the function of the boot block lockout feature?

The boot block lockout feature permanently protects the designated 8K byte section from being erased or programmed once enabled.