The CD4543 is a BCD-to-seven Segment Latch/Decoder/Driver, designed primarily for liquid-crystal display (LCD) applications. The CD4543 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. 

Technical Specification:

• Number of Input Lines: 4 Input
• Number of Output Lines: 7 Output
• Propagation Delay Time: 400 ns
• Operating Supply Voltage: 3 ~ 18V
• High Level Output Current: -1.5 mA
• Low Level Output Current: 1.5 mA
• Maximum Clock Frequency: 8 MHz
• Minimum Operating Temperature: -55°C
• Maximum Operating Temperature: +125°C

Features:                                  

• BCD-to-Seven Segment Latch/Decoder/Driver for LCD Applications
• Display Blanking of all Illegal Input Combinations
• Latch Storage of Code
• Direct Replacement for CD4056
• Low Power CMOS

Applications:

• Instrument Display Driver
• Dashboard Display Driver
• Computer/Calculator Display Driver
• Timing Device Driver (Clock, Watches, Timers)