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The AM27S29AJC is a 4,096-bit (512x8) Bipolar PROM manufactured by AMD and distributed by Rochester Electronics. It features an asynchronous memory organization with 3-state outputs for bus interfacing. The device utilizes a 20-pin QCCJ package with plastic/epoxy body material. Electrical specifications include a maximum access time of 35 ns and an operating temperature range from -55 °C to +75 °C. Supply voltage requirements are not explicitly detailed in the provided component data.
Verify the manufacturer origin, as this part is originally an AMD product now handled by Rochester Electronics. Confirm the specific suffix 'JC' aligns with the required temperature grade and package variant. Ensure compatibility with existing board layouts regarding the 20-pin QLCC form factor and electrical interface requirements before procurement.
Select this component when a non-volatile, mask-programmable solution is required for fixed code storage. The bipolar technology offers faster access speeds compared to standard EEPROMs but lacks electrical erasability. Consider the 3-state outputs for direct system bus connection without additional buffering logic.
This component belongs to the AMD 27S29 series of high-speed PROMs. Rochester Electronics provides lifecycle support for legacy semiconductor components no longer in active production by original manufacturers. This ensures availability for maintenance and replacement in long-life industrial and commercial equipment designs.
Direct pin-to-pin replacements may include other 512x8 bipolar PROMs with compatible access times and package styles. Verify logical equivalence and timing parameters against the original design specifications before substitution.