The 54LS173DMQB is a Quad D-Type Register with Tri-State Outputs manufactured by National Semiconductor, now part of Texas Instruments (TI). This device is part of the 54LS family of low-power Schottky TTL logic devices. The 'DMQB' suffix indicates it is packaged in a ceramic dual-in-line package (CERDIP), typically used in military and aerospace applications due to its enhanced reliability and wider operating temperature range compared to plastic packages.

Applications

• Buffer Registers
• Storage Registers
• Memory Address Registers
• Microprocessor Systems
• Military and Aerospace Electronics

Features

• Quad D-Type Register: Contains four independent D-type flip-flops.
• Tri-State Outputs: Outputs can be disabled, allowing multiple registers to share a common bus.
• Asynchronous Clear Input: Allows for immediate clearing of the register.
• Parallel Load Capability: Data can be loaded into the register simultaneously.
• Low Power Consumption: Minimizes power requirements in battery-powered applications.

Benefits

• Efficient Data Storage: Provides a simple and reliable way to store data.
• Bus Compatibility: Tri-state outputs simplify bus interfacing.
• Flexible Data Handling: Parallel load capability allows for efficient data transfer.
• Reduced Power Consumption: Low-power operation extends battery life.
• Enhanced Reliability: CERDIP package ensures robust performance in harsh environments.

Additional Details

The 54LS173DMQB consists of four D-type flip-flops with tri-state outputs, an asynchronous clear input, and parallel load capability. The tri-state outputs allow the register to be connected to a common data bus without interfering with other devices. The asynchronous clear input allows for immediate resetting of the register, regardless of the clock input. Detailed specifications, including propagation delays, power consumption, operating temperature range, and package dimensions, can be found in the official datasheet from Texas Instruments (TI). It is essential to use proper decoupling capacitors to minimize noise and ensure stable operation. The CERDIP package provides enhanced resistance to temperature variations and environmental factors, making it suitable for demanding applications in military and aerospace environments.