SN74LS90N

Counter Dividers Overview

The SN74LS90N is a monolithic integrated circuit from the Texas Instruments SN54/74LS series, functioning as a decade, divide-by-twelve, and binary counter. It features a 14-pin Dual In-Line Package (PDIP) designed for through-hole mounting. The device operates within a supply voltage range of 4.75V to 5.25V and supports clock frequencies up to 32 MHz or 16 MHz depending on configuration. It includes asynchronous reset and preset capabilities, with an operating temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Supports multiple counting modes including decimal (BCD), divide-by-twelve, and four-bit binary operations.
• Features asynchronous reset and preset inputs for immediate state control without clock dependency.
• Utilizes Low-power Schottky (LS) logic technology for reduced power consumption and high-speed switching.

Counter Dividers Applications

• Digital frequency division circuits
• Decimal counting systems requiring BCD output
• Binary timing and sequencing applications

Counter Dividers Procurement Notes

Verify the package type matches the design requirements, as the SN74LS90N specifically denotes a PDIP package. Confirm the logic family is LS rather than standard 74 series to ensure correct voltage and speed characteristics. Check RoHS compliance status if environmental regulations apply to the assembly process. Ensure the supplier provides original manufacturer documentation to validate authenticity.

Counter Dividers Selection Notes

Select this component when a single IC must provide flexible counting modes such as decimal or binary. The LS series offers a balance between speed and power dissipation suitable for general digital logic. Consider the 14-pin DIP form factor for prototyping or legacy board designs requiring through-hole integration. Verify that the required clock frequency does not exceed the specified limits for the chosen configuration.

Counter Dividers Part Context

This part belongs to the widely used SN54/74LS logic family, known for compatibility with standard TTL interfaces. The SN74LS90 is a classic counter chip often replaced by newer CMOS equivalents like the 74HC90, though pinouts may differ. It serves as a fundamental building block in digital electronics for time-base generation and numerical display drivers.

Counter Dividers Replacement Considerations

Check for SN74LS90 variants from other manufacturers such as ON Semiconductor or Motorola, which share identical functional descriptions. Verify pinout compatibility before substituting with CMOS versions like 74HC90, as voltage levels and drive currents differ significantly.