7490 74ls90 Ic Decade Counter

74LS90 IC – Decade Counter (7490)

The 74LS90 is a high-speed, 4-bit ripple-type counter with versatile counting capabilities, featuring a divide-by-two section and either a divide-by-five (LS90), divide-by-six (LS92), or divide-by-eight (LS93) section. This IC is ideal for applications requiring counting and division functions, offering a flexible solution for BCD, bi-quinary, modulo-12, or modulo-16 counters. The counter is triggered by the HIGH-to-LOW transition of the clock inputs, and it includes a 2-input gated Master Reset (Clear) for reliable operation.

Key Features:

• Low Power Consumption: Typically 45 mW, making it energy-efficient for a wide range of applications.
• High Count Rates: Capable of counting up to 42 MHz speeds, ensuring fast and accurate counting performance.
• Choice of Counting Modes:
  • BCD (Binary Coded Decimal) for decade counting.
  • Bi-Quinary for bi-quinary counting.
  • Divide-by-Twelve and Binary modes for various modular counting needs.
• Input Clamp Diodes: These protect against high-speed termination effects, ensuring signal integrity and reliable performance.
• Master Reset (Clear): A 2-input gated Master Reset allows for easy resetting of the counter.
• The LS90 model also includes a 2-input gated Master Set (Preset 9) feature, useful for initializing the counter to a specific state.

Applications:

• Decade Counter: Commonly used in applications where counting in decimal (0-9) is needed.
• Divide-by-5 Counter: Useful in timing applications and clock generation where division by five is required.
• 4-Bit Binary Counter: Ideal for sequential counting and binary logic applications.
• Modular Counters: Can be configured as modulo-12, modulo-16, or other modular counting systems for digital systems requiring frequency division.

Package Includes:

• 1 x 74LS90 IC (7490 Decade Counter)

The 74LS90 IC provides reliable, high-speed counting and division capabilities for a wide range of digital applications. Its low power consumption, high count rates, and versatile counting modes make it an ideal solution for frequency division, counters, and other timing applications