Descripción
74LS90
Contador por décadas y binario 74LS90. Puede contar en binario del 0 al 9 (BCD) y en biquinario. TTL
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Este circuito integrado consta de 2 contadores independientes uno de 1 bit y otro de 3 bits, utilizando los dos contadores internos podemos hacer que cuente de 0 a 9 aunque configurando los pines 2,3,6 y 7 con las salidas podemos hacer que no solo cuente en sistema decimal.
En electrónica digital, un contador es un circuito secuencial construido a partir de biestable y puertas lógicas capaz de almacenar y contar los impulsos (a menudo relacionados con una señal de reloj), que recibe en la entrada destinada a tal efecto, asimismo también actúa como divisor de frecuencia. Normalmente, el cómputo se realiza en código binario, que con frecuencia será el binario natural o el BCD natural (contador de décadas).
Especificaciones
- Contador Tipo: Decenio
- Frecuencia de reloj: 42 MHz
- El número máximo: 9
- Voltaje: 4.75 a 5.25 V
- Temperatura de funcionamiento: 0 ° C a +70 ° C
- Tipo de familia: LS
- Entrada TTL compatibles
- Salida CMOS
- Encapsulado DIP
- 14 pines
