CD 4518 IC Dual BCD Up Counter CMOS

CD 4518 IC Dual BCD Up Counter CMOS
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.