AT27C080-12DC

Memory IC Overview

The AT27C080-12DC is an 8-megabit (1M x 8) one-time programmable read-only memory (OTP EPROM) manufactured by Microchip Technology. It utilizes low-power CMOS technology and operates on a single 5V supply in normal read mode. The device features a maximum access time of 120 ns, allowing byte-level access without requiring speed-reducing wait states in high-performance microprocessor systems. It is housed in a 28-lead Ceramic Dual In-Line Package (CDIP) with a windowed configuration suitable for UV erasure during programming. The component supports industrial temperature ranges and includes integrated product identification codes.

Memory IC Feature Summary

• Supports rapid programming algorithms with typical byte programming times of 50 microseconds
• Features high-reliability CMOS technology with 2,000V ESD protection and latchup immunity
• Provides TTL and CMOS compatible inputs and outputs for broad system integration

Memory IC Applications

• High-performance microprocessor systems requiring fast non-volatile code storage
• Industrial control applications needing reliable OTP memory in ceramic packages
• Embedded systems utilizing UV-windowed packages for field or lab reprogramming

Memory IC Procurement Notes

Verify the specific suffix DC indicates the Ceramic DIP package with UV window, as packaging options vary across the AT27C080 series. Confirm availability status, as this component may be discontinued or subject to long lead times depending on current production cycles. Ensure the ordering documentation explicitly matches the 120 ns speed grade and 5V operation requirements for your target application design.

Memory IC Selection Notes

Select this part when a windowed ceramic package is required for UV erasable memory in industrial environments. Compare against plastic variants like PDIP or PLCC if hermetic sealing or radiation hardness is not critical. Ensure the 120 ns access time meets the timing constraints of the host processor bus. Verify that the 1M x 8 organization aligns with the address and data line availability of the target system architecture.

Memory IC Part Context

This component belongs to the AT27C080 family of 8-Megabit OTP EPROMs from Microchip Technology. The family offers various speed grades and package types, including plastic DIP, PLCC, and TSOP options. The AT27C080-12DC specifically denotes the 120 ns speed variant in a 28-lead CDIP package. It shares core electrical characteristics with other members of the series but differs in physical form factor and erase capability due to the UV window.

Memory IC Replacement Considerations

Direct replacements include other AT27C080 variants such as AT27C080-90PI or AT27C080-90JI if faster access times are acceptable and package differences are manageable. Cross-brand equivalents require careful verification of pinouts, voltage levels, and timing parameters.