74189 64-Bit Static RAM TTL IC – 16×4 Memory DIP-16

The 74189 is a 64-bit static random access memory (SRAM) integrated circuit organized as 16 words × 4 bits. It provides fast asynchronous read and write operations, making it suitable for temporary data storage in digital systems. Built using TTL logic, the device operates on a standard 5V supply and offers tri-state outputs for direct bus interfacing. The 74189 is widely used in educational digital electronics, legacy computing systems, register storage, and small memory applications.

• 64-bit static RAM storage
• Memory organization: 16 words × 4 bits
• Fast asynchronous read/write operation
• Direct binary address access
• Tri-state outputs for bus interfacing
• TTL logic compatibility
• Standard 5V supply operation
• High-speed data access
• Suitable for register and buffer storage
• DIP-16 through-hole package
• Easy breadboard integration
• Reliable static memory retention while powered
• Useful for educational digital circuits
• Legacy memory system compatibility

• Model: 74189
• Memory Type: Static RAM (SRAM)
• Memory Capacity: 64 bits
• Memory Organization: 16 words × 4 bits
• Supply Voltage: 5V
• Logic Family: TTL
• Access Type: Asynchronous
• Output Configuration: Tri-State
• Address Lines: 4
• Data Width: 4 bits
• Read/Write Control: Supported
• Access Time (Typical): 35ns
• Operating Temperature Range: 0°C to +70°C
• Package Type: 16-Pin DIP
• Mounting Type: Through-Hole
• Application Type: Temporary Digital Storage

• 3D Model
• Datasheet

• Programming the 74LS189 64-Bit RAM