NTE Electronics NTE74C93

The NTE74C90 decade counter and NTE74C93 binary counter are CMOS ICs in 14-pin DIP packages, constructed with N-channel and P-channel enhancement-mode transistors. The 4-bit decade counter can be reset to zero or preset to nine by applying the appropriate logic levels to the R₀₁, R₀₂, R₉₁, and R₉₂ inputs. In addition, a separate flip-flop on the A bit allows the user to employ it as a divide-by-2, divide-by-5, or divide-by-10 frequency counter. The 4-bit binary counter can be reset to zero by applying a high logic level to inputs R₀₁ and R₀₂, and a separate flip-flop on the A bit allows the user to employ it as a divide-by-2, divide-by-8, or divide-by-16 divider. Counting occurs on the falling edge of the input pulse. All inputs are protected against ESD damage.

• Wide supply voltage range: 3V ~ 15V
• Guaranteed noise margin: 1V
• High noise immunity: 0.45VCC (typical)
• Low-power compatibility: fanout of 2 TTL drives 74L