DS8973N

Overview

The DS8973N is a nine-digit LED driver IC manufactured by National Semiconductor. It is designed to operate from three-cell battery supplies. The device features nine outputs, each capable of sinking 100 mA with a voltage drop of less than 0.7 V when driven by an input current of only 0.1 mA. It utilizes a linear drive topology without dimming capability. The component is housed in a 22-pin Dual In-line Package (DIP).

Feature Summary

• Nine-digit LED driving capability optimized for low-power battery operation.
• High current sink performance with minimal control current requirement.
• Linear output stage ensuring stable LED illumination without complex circuitry.

Applications

• Battery-powered digital displays requiring multi-digit readouts.
• Portable instrumentation with limited power supply constraints.
• Consumer electronics utilizing three-cell battery configurations.

Procurement Notes

Verify the manufacturer designation as National Semiconductor or its successors, such as Texas Instruments, due to corporate acquisitions. Confirm the package type is strictly 22-DIP and that the part number suffix 'N' denotes the specific package variant. Ensure the datasheet confirms the 100 mA sink current specification for your specific application requirements.

Selection Notes

Select this component when a dedicated driver for nine-digit displays is required in a battery-operated system. It is suitable for applications where linear regulation is acceptable and dimming functions are not necessary. Consider the DIP package form factor if through-hole mounting is preferred over surface-mount alternatives.

Part Context

The DS8973 belongs to the DS8973 series of LED drivers. These components are specialized integrated circuits intended for driving common-cathode LED arrays. The series focuses on simplicity and efficiency in low-voltage environments, eliminating the need for external transistor networks for digit scanning.

Replacement Considerations

Consult official replacement lists from Texas Instruments, the successor to National Semiconductor's analog division. Verify pin compatibility and electrical specifications before substituting with other nine-digit LED drivers from different manufacturers.