MC14543BD

Display Drivers Overview

The MC14543BD is a BCD-to-seven segment latch/decoder/driver constructed with complementary MOS (CMOS) enhancement mode devices, designed for liquid crystal readouts. It integrates a 4-bit storage latch and an 8421 BCD-to-seven segment decoder. The device operates within a supply voltage range of 3 V to 18 V and supports installation in SOIC-16 packages. It functions across a temperature range of -55°C to +125°C with a power dissipation of 500 mW.

Display Drivers Feature Summary

• Integrates 4-bit storage latch and 8421 BCD-to-seven segment decoding logic
• Supports direct driving of LCD segments via square wave phase input
• Includes blanking input to suppress display on illegal input combinations
• Capable of inverting output logic levels through phase control

Display Drivers Applications

• Liquid crystal display (LCD) readout systems
• Direct LED common anode or cathode driving
• Incandescent and gas discharge indicator circuits

Display Drivers Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and compliance status. Ensure the ordering part number matches the required RoHS and lead-free specifications. Confirm that the SOIC-16 package variant aligns with your PCB footprint requirements before finalizing procurement orders.

Display Drivers Selection Notes

Select this component when a combined latch and decoder function is required for seven-segment displays. It is suitable for designs needing wide supply voltage flexibility and high-temperature operation. Consider its drive capability for low-power TTL loads if interfacing with digital logic sources without additional buffering.

Display Drivers Part Context

This device belongs to the MC14543B series of CMOS logic ICs manufactured by onsemi. It serves as a pin-for-pin replacement for the CD4056A when Pin 7 is tied to VSS. The component is categorized under encoders, decoders, multiplexers, and demultiplexers within the broader logic IC product family.

Display Drivers Replacement Considerations

The MC14543BD is documented as a pin-for-pin replacement for the CD4056A, provided Pin 7 is connected to VSS. Verify electrical compatibility with existing circuit designs when substituting this component.