CD74HCT4543EG4

Display Drivers Overview

The CD74HCT4543EG4 is a high-speed CMOS logic integrated circuit manufactured by Texas Instruments. It functions as a BCD-to-7-segment latch/decoder/driver specifically designed for LCD displays. The device accepts Binary-Coded Decimal inputs and decodes them to drive seven-segment indicators. It operates within a supply voltage range of 4.5 V to 5.5 V. The component supports an operating temperature range from -55 °C to +125 °C. It is housed in a 16-pin SOIC package with a leaded configuration, designated by the 'E' suffix.

Display Drivers Feature Summary

• Integrates BCD input latching, decoding, and segment driving capabilities into a single chip.
• Optimized output driver structure provides sufficient current capability for direct LCD segment control.
• Compatible with standard CMOS logic levels while accepting TTL-compatible input signals.

Display Drivers Applications

• Driving common-cathode or common-anode LCD numeric displays
• Decimal digit indication in digital instrumentation panels
• Seven-segment display interfaces in consumer electronic devices

Display Drivers Procurement Notes

Verify that the specific ordering suffix matches the required package type and environmental compliance status. The 'G4' suffix indicates lead-free construction and RoHS compliance. Confirm the 'E' suffix corresponds to the SOIC package variant. Ensure the supplier source is authorized to guarantee authenticity and traceability of the semiconductor components.

Display Drivers Selection Notes

Select this component when a dedicated decoder-driver solution is required for LCD segments rather than LEDs. Consider the power consumption characteristics of the CMOS technology against alternative bipolar options. Evaluate the pin count and package dimensions against available PCB real estate constraints. Verify that the input logic thresholds align with the system's microcontroller or logic family outputs.

Display Drivers Part Context

This part belongs to the Texas Instruments CD74HCT series of high-speed CMOS logic devices. The series is designed to offer faster switching speeds compared to standard HC logic while maintaining compatibility with TTL input levels. The CD74HCT4543 specifically addresses the need for decoded outputs in display applications, simplifying circuit design by combining multiple logical functions into one package.

Display Drivers Replacement Considerations

The CD74HCT4543E is a parameter-equivalent alternative without the green compliance suffix. Cross-manufacturer equivalents such as the SN74HC4543 may require verification of pinout compatibility and electrical specifications. Ensure any substitute maintains the same voltage range and output drive characteristics for LCD applications.