M74HC4543B1R

The M74HC4543B1R from STMicroelectronics is a high-speed CMOS BCD-to-7 segment decoder integrated circuit with a built-in BCD input latch and a 7-segment driver specifically designed for liquid crystal displays (LCDs). Fabricated using silicon gate C2MOS technology, this device offers low power dissipation and high noise immunity.

Key electrical characteristics include a wide operating voltage range of 2V to 6V, a typical propagation delay of 14ns at 6V, and low supply current consumption of only 4μA maximum at 25°C. The symmetrical output impedance allows for a minimum output current of 4mA for both high-level and low-level outputs. It also boasts high noise immunity with VNIH and VNIL at 28% of VCC (minimum).

This IC is pin and function compatible with the 74 Series 4543. It is supplied in a 16-DIP (Dual In-line Package) through-hole mounting package, suitable for applications requiring a 7-segment display driver for LCDs. When driving LCDs, a common square wave signal must be applied to the PH input and the backplane of the display. All inputs are protected against static discharge and transient overvoltage.

The M74HC4543B1R is designed for applications requiring BCD to 7-segment conversion for LCD readouts. Its features make it suitable for various digital display systems where a reliable and efficient driver is needed.