74LVX74SJ

Overview

The Fairchild Semiconductor 74LVX74SJ is a dual D-type flip-flop integrated circuit belonging to the 74LVX logic family. It features two independent positive-edge-triggered D-type flip-flops with complementary outputs, housed in a 14-pin Small Outline Package (SOP). The device operates within a supply voltage range of 2.0V to 3.6V and supports an operating temperature range from -40°C to +85°C. Key electrical characteristics include a maximum propagation delay of 13.2ns at 3.3V with a 50pF load, a clock frequency capability of 85MHz, and output drive currents of 4mA for both high and low states.

Feature Summary

• Dual D-type flip-flops with positive-edge triggering
• Complementary outputs for versatile logic interfacing
• Low voltage operation compatible with 3.3V systems
• Surface mount packaging for automated assembly

Applications

• Parallel-to-serial data conversion circuits
• Shift register configurations
• Timing and synchronization logic modules
• General-purpose digital storage elements

Procurement Notes

Verify the specific manufacturer origin, as this part number may be produced by Fairchild Semiconductor or onsemi following corporate acquisitions. Confirm package dimensions against the SOP-14 standard to ensure mechanical compatibility with existing footprints. Check RoHS compliance status if environmental regulations apply to your deployment region. Ensure the component is sourced from authorized distributors to avoid counterfeit risks associated with obsolete or legacy logic families.

Selection Notes

Select this component when a compact solution for dual bit storage is required in low-voltage designs. The LVX series offers speed comparable to older LVC devices while maintaining lower power consumption. Consider the 14-pin SOP footprint constraints during PCB layout. Verify that the 3.3V supply rail aligns with the system's logic levels. This device is suitable for applications requiring moderate switching speeds up to 85MHz without the complexity of tri-state outputs.

Part Context

The 74LVX74SJ belongs to the broader 74LVX logic family, which bridges the performance gap between standard CMOS and low-voltage TTL technologies. This family is characterized by fast switching speeds and reduced power dissipation compared to traditional HC/HCT counterparts. The SJ suffix typically denotes a specific tape-and-reel or tube packaging variant within the SOP-14 form factor, facilitating surface-mount integration in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include MC74LVX74MG from onsemi, which shares identical logical functionality and pinout. Other compatible alternatives may exist from manufacturers like Texas Instruments or NXP under similar LVX designations, provided they match the 2.0V-3.6V supply range and SOP-14 package dimensions.