The 74HC4543 is a high-speed Si-gate CMOS device designed and manufactured by NXP Semiconductors. This integrated circuit is tailored for converting Binary Coded Decimal (BCD) input data into control signals for 7-segment displays, particularly for liquid crystal and LED displays.

Key Features

• BCD to 7-segment Latch/Decoder/Driver: The device includes a BCD code-B latch/decoder and a 7-segment driver that can directly drive a display.
• High Noise Immunity: Characteristic of CMOS technology, the 74HC4543 has a high noise immunity and low power consumption.
• Low Power Consumption: It is designed to operate with very low power, making it suitable for battery-operated applications.
• Lamp Test and Blanking Capability: The device comes with lamp test and blanking input to test the display and to turn off or pulse modulate the display.
• Wide Operating Voltage: It operates over a wide voltage range from 2.0 to 6.0 V, accommodating various application needs.

Applications

The 74HC4543 is ideal for a variety of applications where BCD to 7-segment decoding is required. Common applications include:

• Electronic meters
• Instrumentation displays
• Clock displays
• Calculators
• Other electronic devices requiring numeric displays

Technical Specifications

• Logic Family: HC
• Logic Type: BCD to 7-Segment Latch/Decoder/Driver
• Number of Segments: 7
• Output Current: 25 mA
• Mounting Type: Surface Mount or Through Hole
• Package / Case: SOT-38-1, DIP-16, SO-16

The 74HC4543 by NXP is a versatile and reliable choice for designers looking to interface numeric displays with digital systems. Its ease of use, combined with the robustness of CMOS technology, makes it an essential component for any application requiring BCD to 7-segment conversion.