4518 Dual BCD Up Counter CMOS IC

Description

CD4518 IC is a BCD Up counter consisting of two individual synchronous Up counters. The IC is made from D-type flip-flops and has an interchangeable CLOCK and ENABLE pin. Upcounter IC has various applications and can be used for timing-related projects. CD4518 Pinout Configuration The CD4518 IC has 16 pins in total. The table below can be referred to understand the pin configuration of the IC. Pin Number Pin Type Pin Description 1 Clock A Clock Input A 2 Enable A Enable line A 3 Q1A Counter A 4 Q2A Counter A 5 Q3A Counter A 6 Q4A Counter A 7 Reset A To Reset counter A 8 VSS Ground 9 Clock B Clock Input B 10 Enable B Enable line B 11 Q1B Counter B 12 Q2B Counter B 13 Q3B Counter B 14 Q4B Counter B 15 Reset B To Reset Counter B 16 VDD Positive supply Input Technical Specifications Physical Case/Package PDIP Contact Plating Gold Mount Through Hole Number of Pins 16 Technical Direction Unidirectional Frequency 8 MHz Logic Function Counter Max Operating Temperature 125 °C Max Supply Voltage 18 V Min Operating Temperature -55 °C Min Supply Voltage 3 V Number of Bits 4 Number of Bits per Element 4 Number of Channels 2 Number of Circuits 2 Number of Elements 2 Number of Gates 2 Propagation Delay 650 ns Quiescent Current 100 µA Reset Asynchronous Sync/Async Synchronous Turn-On Delay Time 560 ns Dual BCD Up Counter IC Working The CD451 Up counter consists of two identical synchronous 4-stage counters. The image below shows the logic circuit of the BCD Up counter. The counter stages are the D-type flip-flops having interchangeable CLOCK and ENABLE lines for incrementing the positive or negative-going transition, For the operation of a single unit, the ENABLE input is kept HIGH and the counter advances each positive-going transition of the CLOCK. The RESET lines clear out the HIGH levels. Applications Here are some of the applications of the CD4518 IC. Pulse counter Counter circuits Multistage Ripple Counting Timing related projects 4018 Datasheet

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