DM74ALS273SJ

Overview

The DM74ALS273SJ is an octal D-type flip-flop manufactured by onsemi, belonging to the ALS logic series. It features eight positive-edge-triggered D flip-flops with non-inverting outputs and a master reset input. The device is housed in a 20-pin SSOP package. It operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 50 MHz. The component has a propagation delay of 16 ns at 5V with a 50pF load and consumes a static current of 19 mA. It is rated for operation between 0°C and +70°C.

Feature Summary

• Contains eight independent positive-edge-triggered D-type flip-flops
• Includes a dedicated master reset input for synchronous clearing
• Features non-inverting outputs for direct signal interfacing
• Utilizes Schottky barrier diode technology for high-speed performance

Applications

• Parallel-to-serial data conversion circuits
• Register file storage elements
• Timing synchronization and edge detection systems
• Digital state machine implementation

Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm package integrity and pin alignment prior to installation. Review datasheet specifications for electrical limits and thermal requirements. Ensure compatibility with existing system voltage levels and interface standards. Validate replacement options if original stock is unavailable.

Selection Notes

Select this component for applications requiring multiple synchronized storage elements in a compact surface-mount package. Consider the ALS series speed-power trade-offs against standard TTL or CMOS alternatives. Evaluate the 20-pin SSOP footprint constraints against PCB layout requirements. Assess the 50 MHz operating limit against system clock speeds.

Part Context

This part belongs to the DM74ALS family of high-speed Schottky TTL logic devices. The 74ALS273 variant specifically provides octal storage functionality. It serves as a digital memory element in microprocessor-based systems and communication interfaces. The SJ suffix indicates the specific SSOP package configuration offered by the manufacturer.

Replacement Considerations

• SN74ALS273NSR
• SN74ALS273N

FAQ

What is the function of the master reset input?

The master reset input asynchronously clears all eight flip-flops to a low state when activated.

How does the positive-edge triggering work?

Data at the D inputs is latched into the flip-flops on the rising edge of the clock signal.

What is the maximum operating frequency?

The device supports a maximum clock frequency of 50 MHz under specified conditions.