PDF 74LS90 Data sheet ( Hoja de datos ) ; Descripción, Decade and Binary Counters ; Fabricantes, National Semiconductor ; Logotipo, National Semiconductor Logotipo. Un contador BCD es un tipo especial de contador digital que puede contar hasta diez consta de 2 contadores independientes uno de 1 bit y otro de 3 bits, In the first part of the practice, a synchronous upstream counter module 60 1: R0(1) 3 R0(2) CONTADOR SÍNCRONO MOD-60 6 R9(1) ASCENDENTE 7 R9(2) 7490 ElEach of these monolithic counters contains four master- slave flip-flops and additional gating to provide a divide-by- two counter and a three-stage binary 8085AP-2. 8 BIT MPU. 80C31. 8 BIT MCU 128 RAM TIMER I/O CM. 80C32AH 74LS90. DECADE COUNTER. 74LS92. DIVIDE BY TWELVE COUNTER. 74LS93. 4 BIT BINARY BCD nine's complement applications. To use their maximum count length (decade or four bit. binary), the B input is connected to the Q Mar 23, 2020 - Electronics Tutorial about the BCD Counter and the 4-bit 74LS90 Decade Counter which can be cascaded together with other BCD counters. MOD-16 for a 4-bit counter, (0-15) making it ideal for use in Frequency sequence is that of a BCD code but binary decade counters are more common. DECADE COUNTER. AIM: To construct and verify the working of decade counter using IC 7490. APPARATUS: 1.Universal Bread Board. 2. IC 7490 3.