AT27C040-70PU

Memory IC Overview

The AT27C040-70PU is a 4,194,304-bit One-Time Programmable Read-Only Memory (OTP EPROM) organized as 512K by 8 bits. It operates with a single 5V ± 10% power supply and features a fast read access time of 70 ns. The device utilizes low-power CMOS technology, drawing a maximum active current of 30 mA at 5 MHz and a maximum standby current of 100 μA. It is housed in a 32-lead plastic Dual Inline Package (PDIP) and supports an industrial temperature range from -40°C to +85°C.

Memory IC Feature Summary

• Fast read access time of 70 ns eliminates the need for wait states on high-performance microprocessor systems.
• Low-power CMOS operation provides typical active consumption of 8 mA and standby current below 10 μA.
• Integrated product identification code electronically identifies the device and manufacturer for programming equipment.
• Rapid programming algorithm reduces programming time to typically 100 μs per byte.

Memory IC Applications

• High-performance microprocessor systems requiring fast data retrieval without speed-reducing wait states.
• Portable systems utilizing regulated or unregulated battery power supplies.
• Industrial applications requiring reliable OTP storage within specified temperature ranges.

Memory IC Procurement Notes

Verify that the ordering suffix PU corresponds specifically to the 32-lead PDIP package variant. Confirm the component meets the required industrial temperature range specifications (-40°C to +85°C). Ensure compatibility with standard 5V logic levels and check for lead-free packaging requirements if applicable to your manufacturing process.

Memory IC Selection Notes

Select this component when a 512K x 8 bit capacity is required with a 70 ns access speed. It is suitable for designs needing low standby power consumption and TTL/CMOS compatible inputs and outputs. Consider the Rapid Programming Algorithm for efficient production programming workflows.

Memory IC Part Context

This part belongs to the AT27C040 series of 4-Megabit OTP EPROMs manufactured by Atmel (now Microchip Technology). The series includes variants with different access times and package options, such as PLCC and TSOP. The AT27C040-70PU specifically denotes the 70 ns speed grade packaged in a standard 32-lead PDIP format.

Memory IC Replacement Considerations

AT27C040-90PU

Memory IC FAQ

What are the specific voltage requirements for VPP during programming?

During programming, VPP must be set to 13.0V ± 0.25V, while VCC is raised to 6.5V ± 0.25V.

How does the integrated product identification code function?

The code allows industry-standard programming equipment to electronically identify the device and manufacturer, automatically selecting the proper programming algorithms and voltages.