74189 64-Bit Random Access Memory TTL IC

The 74189 is a small-capacity random access memory IC providing 64 bits of static storage organized as 16 words by 4 bits.
It supports asynchronous read and write operations controlled by address and control inputs.
The device is implemented using TTL logic and is compatible with standard 5 V digital systems.
Tri-state outputs allow direct connection to shared data buses.
It is commonly used in educational systems, register storage, and legacy digital logic designs.

• Static Random Access Memory with 64-bit total capacity

• 16 × 4 Memory Organization supporting nibble-wide data storage

• Asynchronous Read/Write Operation for simple control logic

• Tri-State Outputs enabling bus-oriented system integration

• TTL Logic Compatibility operating from a 5 V supply

• Direct Address Access using binary address inputs

• Model | 74189

• Memory Type | Static RAM

• Memory Capacity | 64 bits

• Memory Organization | 16 words × 4 bits

• Supply Voltage | 5 V

• Logic Family | TTL

• Access Type | Asynchronous

• Output Configuration | Tri-state

• Operating Temperature Range | 0 °C to 70 °C

• Package Type | 16-pin DIP

• Mounting Type | Through-hole

• 3D Model
• Datasheet