DM74AS74SJ

Overview

The DM74AS74SJ is a dual D-type flip-flop integrated circuit manufactured by onsemi, belonging to the 74AS logic series. It features two independent one-bit elements in a 14-SOP surface-mount package. The device operates with a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 105 MHz. Key electrical parameters include a maximum propagation delay of 9ns at 5V with 50pF load, output currents of 2mA (high) and 20mA (low), and a static current of 16 mA. It functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Contains two independent positive-edge-triggered D-type flip-flops with set and reset capabilities.
• Utilizes Schottky transistor technology for high-speed operation and reduced propagation delay.
• Provides complementary outputs for each flip-flop element.

Applications

• High-speed digital data storage and shift register circuits
• Timing and synchronization logic in industrial control systems
• State machine implementation in embedded hardware

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm package integrity and pin alignment against the 14-SOP specification. Request batch-specific documentation to ensure compliance with RoHS and REACH standards. Validate that the replacement strategy accounts for the discontinuation of this specific part number.

Selection Notes

Select this component for applications requiring fast switching speeds within the 74AS family specifications. Ensure the design accommodates the 14-SOP surface-mount form factor and the 0°C to 70°C commercial temperature range. Verify that the power supply constraints align with the 4.5V to 5.5V operational window and that the output drive requirements match the specified current limits.

Part Context

This part belongs to the 74AS00-series logic family, known for advanced Schottky technology offering higher speed than standard 74LS devices. The DM prefix indicates a specific manufacturing variant from onsemi. As a dual D-flip-flop, it serves as a fundamental building block for sequential logic circuits in digital electronics.

Replacement Considerations

Public confirmed substitute part numbers: DM74AS74MX, DM74AS74N, DM74AS74SJX.