7490 IC Decade Counter DIP-14

Description

SN74LS90N Decade Counter IC DIP-14 5V TTL Logic Binary Counter The SN74LS90N Decade Counter IC DIP-14 5V TTL Logic Binary Counter is a high-speed integrated circuit from the 74LS TTL logic family. It is designed as a ripple counter capable Features Decade counter (mod-10) and binary counter operation. Built-in divide-by-2 and divide-by-5 counter stages. TTL compatible 5V operation. Asynchronous reset inputs for fast clearing. Specifications Parameter Value Package DIP-14 Voltage – Supply 2V~6V Direction Up Counter Trigger Type Falling Edge Operating Temperature -40℃~+125℃ Reset Asynchronous Number of Elements 1 Propagation Delay 50ns Count Rate 32MHz;16MHz Features Reset function Pin layout 74LS90 Pin Configuration Pin No. Pin Name Description 1 CLKB Clock Input 2 2 R1 Reset 1 3 R2 Reset 2 4 NC Not Connected 5 Vcc Positive Supply Input 6 R3 Reset 3 7 R4 Reset 4 8 Qc Output Pin 3 9 Qb Output Pin 2 10 Gnd Ground 11 Qd Output Pin 4 12 Qa Output Pin 1 13 NC Not Connected 14 CLKA Clock Input 1 Footprint Brief About 7490 IC 74LS90 is basically a MOD-10 decade counter that generate a BCD output code. It consists of four master-slave JK flip-flop, which are internally connected to provide MOD-2 (count to 2) counter and MOD-5 counter. 74LS90 also have an independent toggle JK flip-flop by CLKA and other three are driven by the CLKB. Internal Logic Diagram How to Use Decade Counter IC? The below circuit diagram is for BCD decade counter , by giving HIGH and LOW logic to the CLKA pin, IC start counts from zero to 8 at every HIGH logic. If you want to display the number on a 7-segment display you need a seven segment display driver IC. Package Include: 1x 7490 IC Decade Counter DIP-14 74LS90 BCD Counter IC Datasheet

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