An SN74LS189AN 64-Bit Random-Access Memory (16x4 RAM) with 3-State Inverting Outputs is a Low-Power Schottky TTL Integrated Circuit (IC) designed for high-speed scratchpad memory, buffer storage, and digital register files. Encapsulated in a standard 16-pin Dual In-line Package (DIP-16), it is organized as 16 words of 4 bits each. Printed clearly with part number "SN74LS189AN" .

This product is featured by Famephase Electronic Accessories as an essential digital logic component for high-speed cache memory prototyping, ALU register stacks, FIFO buffers, micro-instruction storage, and digital computer architecture design.