DM7473N

Overview

The DM7473N is a dual J-K flip-flop integrated circuit manufactured by onsemi, belonging to the 74S series of logic components. It features two independent positive-edge-triggered flip-flops within a single package, designed for high-speed digital applications requiring reliable state storage and sequential logic control. The device utilizes Schottky transistor technology to achieve faster switching speeds compared to standard logic families while maintaining compatibility with conventional TTL input levels. This component is housed in a 14-pin Mini-DIP (MDIP) surface-mount or through-hole compatible package, suitable for board-level integration where space efficiency and performance are critical. It operates with a supply voltage range of 4.75V to 5.25V, ensuring stable operation in standard 5V digital systems. The internal circuitry includes dedicated set and reset inputs for direct control of the output states, allowing for precise initialization and asynchronous clearing of the flip-flop states without relying solely on clock transitions. The design supports a maximum clock frequency of 100 MHz under specified load conditions, making it appropriate for high-speed data processing and timing circuits.

Feature Summary

• Dual independent J-K flip-flops with positive-edge triggering for sequential logic operations
• Schottky technology implementation providing high-speed switching capabilities
• Asynchronous set and reset inputs for direct state control and initialization
• Standard 5V logic level compatibility with defined noise margins

Applications

• High-speed digital counters and shift registers
• Sequential logic control circuits in industrial automation
• Data storage elements in communication interface boards
• Timing signal generation and synchronization circuits

Procurement Notes

Verify that the specific order confirms the 'DM' prefix variant, as this denotes the miniaturized MDIP package distinct from standard DIP versions. Confirm RoHS compliance status if required for modern manufacturing environments, noting that older 74S series parts may have varying environmental declarations. Ensure the supplier provides traceable documentation matching the onsemi manufacturer part number to avoid confusion with equivalent parts from other vendors. Check for any specific handling requirements related to the Schottky technology during storage and installation.

Selection Notes

Select the DM7473N when a compact form factor is required alongside the high-speed performance characteristics inherent to the 74S logic family. Consider this component for designs needing dual independent flip-flops with asynchronous control features in a small footprint. Evaluate the trade-off between the higher power consumption typical of Schottky logic against the benefits of reduced propagation delay. Ensure the application environment stays within the specified operating temperature range and supply voltage tolerances to maintain reliable edge-triggered operation.

Part Context

The DM7473N belongs to onsemi's extensive portfolio of discrete logic integrated circuits, specifically within the 74S (Schottky) series known for speed optimization. This series represents a historical evolution in digital logic design, bridging the gap between standard TTL performance and faster ECL-like speeds at lower costs. As a member of the 74xx family, it maintains pinout compatibility with other devices in the broader 74-series ecosystem, facilitating modular design approaches. The 'D' in the part number typically indicates a specific package style variation, distinguishing it from standard plastic DIP counterparts while retaining functional equivalence.

Replacement Considerations

Direct substitutes include equivalent J-K flip-flops from other manufacturers such as SN74S73N from Texas Instruments, which shares identical logical functionality and pin configuration. Verify package dimensions and lead spacing compatibility when swapping suppliers to ensure mechanical fit. Cross-reference datasheets for minor variations in electrical parameters like propagation delay or input current if operating near specification limits.