74LS157 74HC157
$23.00
The 74LS157 is a high speed Quad 2-Input Multiplexer.
Four bits of data from two sources can be selected using the common Select and Enable inputs. The four buffered outputs present the selected data in thetrue (non-inverted) form. The LS157 can also be used to generate any four of the 16 different functions of two variables. The LS157 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families.
LINK´s INTERESANTES:
http://74ls157.chinaicmart.com/
http://diydrones.com/profiles/blogs/705844:BlogPost:35313
http://www.oocities.org/the_beijing_dragon/sram.htm
74LS160 74HC160
$24.00
Este circuito integrado es un contador programable de 4 bits con carga de datos paralelo. El reset es asíncrono. Dispone de una salida de acarreo para contajes en cascada, así como de dos entradas de control del contaje.
LINK´s INTERESANTES:
http://meteo.ieec.uned.es/www_Usumeteog/comp_sec_contadores_sincronos.html
http://www.forosdeelectronica.com/f25/informacion-acerca-ics-74ls160-74ls169-15096/
74LS193 74HC193
$22.00
CIRCUITO TTL, Binary Up/Down Counter with Clear Datasheet, TAMBIEN MANEJAMOS EN MONTAJE SUPERFICIAL.