AT27C512R-12TC

Memory IC Overview

The AT27C512R-12TC is a low-power, high-performance 524,288-bit one-time programmable read-only memory (OTP EPROM) organized as 64K by 8 bits. It operates on a single 5V ± 10% supply and provides a fast access time of 120 ns. The device features CMOS technology with maximum standby current of 100 μA and active current of 20 mA at 5 MHz. It supports Rapid™ programming with a typical pulse width of 100 μs per byte. The component is housed in a 28-lead Thin Small Outline Package (TSOP) and is rated for commercial temperature operation ranging from 0°C to 70°C.

Memory IC Feature Summary

• Provides 524,288 bits of non-volatile storage organized as 64K x 8 bits for reliable firmware storage.
• Features a Rapid™ programming algorithm that reduces programming time to typically 100 μs per byte.
• Includes an integrated product identification code to electronically identify the manufacturer and device type.
• Offers flexible bus control via two-line CE and OE/VPP signals to prevent bus contention.

Memory IC Applications

• High-performance microprocessor systems requiring direct firmware access without WAIT states.
• Industrial and commercial applications utilizing standard JEDEC packages.
• Embedded systems requiring reliable, non-volatile data storage with low power consumption.

Memory IC Procurement Notes

Verify the specific speed grade suffix matches the required access time, as the -12 designation indicates 120 ns performance. Confirm the package type corresponds to the TSOP variant. Ensure the ordering code aligns with the intended commercial temperature range of 0°C to 70°C. Cross-reference the manufacturer identifier within the datasheet to confirm authenticity during production programming.

Memory IC Selection Notes

Select this component when a single 5V supply is available and non-volatile storage is required. The 120 ns access time suits systems where moderate speed is acceptable. Consider the TSOP package for space-constrained surface-mount designs. Verify that the one-time programmable nature fits the production workflow, as data cannot be erased or rewritten after programming.

Memory IC Part Context

The AT27C512R belongs to the Atmel 27C512 series of OTP EPROMs. This family offers various speed grades and package options, including PLCC, PDIP, SOIC, and TSOP. The device utilizes scaled CMOS technology for lower active power consumption compared to older NMOS technologies while maintaining TTL-compatible inputs and outputs.

Memory IC Replacement Considerations

Compatible substitutes include other 512K-bit OTP EPROMs such as the AT27C512R-15TC or AT27C512R-90TC, which share the same pinout and organization but differ in access speed. Other manufacturers' 27C512 equivalents may require verification of voltage levels and timing parameters.