74LCX74TTR

Overview

The STMicroelectronics 74LCX74TTR is a dual D-type flip-flop with separate clock and clear inputs, manufactured using advanced low-voltage CMOS technology. It operates within a supply voltage range of 2.0 V to 3.6 V, ensuring compatibility with modern low-power systems. The device features high-speed performance with propagation delays as low as 5.2 ns at 3.3 V. It includes power-down protection on all inputs and outputs, preventing excessive current draw during standby. The component is housed in a compact 14-TSSOP package, suitable for surface-mount applications requiring small form factors.

Feature Summary

• Dual D-type flip-flop architecture with independent clock and clear control
• Low-voltage operation optimized for 3.3 V digital environments
• Power-down protection prevents high current consumption during off-state
• High noise immunity with ESD protection exceeding 2 kV HBM

Applications

• Parallel data storage and register circuits
• Shift registers for serial-to-parallel conversion
• Timing and synchronization logic in embedded systems
• State machine implementations in consumer electronics

Procurement Notes

Verify the specific ordering suffix 'TTR' corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the 14-TSSOP footprint matches the PCB design constraints. Ensure the selected variant meets the required operating temperature range for the intended application environment. Cross-reference the datasheet revision to confirm pinout consistency with existing designs.

Selection Notes

Select this component when a dual D-flip-flop is needed for low-voltage logic interfacing. Consider the 74LCX series for its superior speed-to-power ratio compared to standard HC families. Evaluate the 14-TSSOP package size against available board space. Verify input voltage tolerance if interfacing with 5 V signals, as LCX devices typically offer 5 V tolerant inputs.

Part Context

The 74LCX74 belongs to STMicroelectronics' 74LCX family of advanced low-voltage CMOS logic devices. This family is designed for high-speed, low-power applications in portable and battery-operated equipment. The 74LCX series offers pinout compatibility with traditional 74-series logic while providing improved electrical characteristics. It is widely used in mobile phones, PDAs, and other handheld devices requiring efficient power management.

Replacement Considerations

Direct substitutes include the SN74LCX74 from Texas Instruments, which shares identical logical functionality and pinout. Other compatible alternatives may be found within the same 74LCX family from different manufacturers, provided they support the 2.0 V to 3.6 V operating range and 14-TSSOP package.