74LS189 64 Bit RAM with 3 State Output IC 74189 74HC189

74LS189 / 74189 / 74HC189 – 64-Bit RAM with 3-State Output IC

The 74LS189 (or 74189, 74HC189) is a 64-bit static RAM (SRAM) memory IC, which features 3-state outputs. This IC is designed for high-speed memory storage and retrieval, often used in digital systems where temporary data storage is required. It provides a versatile solution for various memory-intensive applications.

Key Features:

• 64-Bit RAM: The IC contains 64 bits of static RAM, organized into an array of memory cells, which allows for the storage and retrieval of 64 bits of data in parallel.
• 3-State Output: The IC features 3-state outputs that allow for multiple devices to share the same data bus, avoiding bus conflicts. This makes it ideal for use in systems where multiple memory devices or peripherals are connected to the same data bus.
• High-Speed Operation: It is designed for fast read and write operations, making it suitable for high-performance applications in digital circuits.
• Low Power Consumption: The IC operates with minimal power consumption, making it energy-efficient, which is critical in battery-powered or low-power systems.
• TTL/CMOS Compatible: Compatible with both TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic families, offering flexibility in design.
• Fast Access Time: Designed with fast access times to ensure efficient data retrieval from memory in real-time applications.
• Wide Voltage Range: The IC operates across a voltage range from 4.5V to 5.5V (for 74LS189), making it suitable for typical TTL or CMOS logic systems. The 74HC189 variant can also operate within the standard 2V to 5.5V range.
• Byte-Wide Data Bus: The IC features a byte-wide data bus, enabling efficient 8-bit-wide memory access.

Pin Configuration:

The 74LS189/74189/74HC189 typically comes in a 24-pin Dual In-line Package (DIP) or SOIC package. Key pins include:

• Data Inputs (D0-D7): 8 data input pins for writing data into memory.
• Data Outputs (Q0-Q7): 8 data output pins for reading data from memory, with 3-state functionality.
• Address Inputs (A0-A5): 6 address pins to select specific memory locations (64 bits in total).
• Chip Enable (CE): Enables or disables the chip for read or write operations.
• Write Enable (WE): Determines if the chip is in write mode (active LOW).
• Output Enable (OE): Enables the data outputs (active LOW) for read operations.

Applications:

• Temporary Data Storage: The 74LS189 series is ideal for applications that require temporary storage of data in a digital circuit, such as buffers, data registers, and memory caches.
• Communication Systems: Often used in communication devices for data storage, buffering, and caching purposes to facilitate fast and reliable data transfer.
• Microprocessor/Controller Systems: Can be used in microcontroller or microprocessor-based systems where small amounts of data need to be quickly accessed or stored.
• Embedded Systems: Frequently used in embedded systems for fast memory access in applications like signal processing, control systems, and IoT devices.
• Data Bus Systems: Its 3-state output capability makes it particularly suitable for systems where multiple memory devices share the same bus or data line.

Package Includes:

• 1 x 74LS189 / 74189 / 74HC189 – 64-Bit RAM with 3-State Output IC

Key Benefits:

• Ease of Use: Simple interface for reading and writing 64-bit data using standard address, write enable, and output enable pins.
• Space Efficiency: Ideal for applications where space is limited and high-speed memory storage is necessary.
• Scalability: Allows for easy integration with other logic circuits, particularly in complex data bus systems with multiple memory devices.

The 74LS189 / 74189 / 74HC189 64-Bit RAM with 3-State Output IC is a robust memory solution for a wide range of digital and embedded systems. Its combination of fast access, low power consumption, and flexible 3-state output makes it ideal for high-performance applications