General Description

The MM74C90 decade counter and the MM74C93 binary counter and complementary MOS (CMOS) integrated circuits constructed with N- and P-channel enhancement mode transistors. The 4-bit decade counter can reset to zero or preset to nine by applying appropriate logic level on the R01, R02, R91 and R92 inputs. Also, a separate flip-flop on the A-bit enables the user to operate it as a divide-by-2, 5 or 10 frequency counter.

Features

■ Wide supply voltage range: 3V to 15V

■ Guaranteed noise margin: 1V

■ High noise immunity: 0.45 VCC (typ.)

■ Low power compatibility: Fan out of 2 TTL driving 74L

■ The MM74C93 follows the MM74L93 Pinout