DM7447AN

Display Drivers Overview

The DM7447AN is a BCD-to-seven-segment decoder and driver belonging to the TTL/H/L series. It features active-LOW outputs designed for driving common-anode LEDs or incandescent indicators directly. The device includes full ripple-blanking input/output controls and a lamp test input. It is housed in a 16-pin PDIP package with a plastic body, measuring 0.300 inches in width. The component operates within a standard temperature range up to 70 °C.

Display Drivers Feature Summary

• Active-LOW outputs capable of driving common-anode displays directly
• Integrated ripple-blanking input and output controls
• Dedicated lamp test input functionality
• Unique display patterns for BCD input counts exceeding nine

Display Drivers Applications

• Driving common-anode LED seven-segment displays
• Driving incandescent indicator displays
• BCD to decimal decoding circuits
• Digital counting system visual interfaces

Display Drivers Procurement Notes

Verify the manufacturer source carefully, as Rochester Electronics distributes this part originally from Fairchild Semiconductor. Confirm lead compatibility with the MS-001 DIP-16 package specification. Ensure the specific revision matches the required TTL/H/L series electrical characteristics. Check for any RoHS compliance discrepancies if environmental regulations apply to the final assembly.

Display Drivers Selection Notes

Select this component when direct drive capability for common-anode displays is required without external transistors. The active-LOW output logic simplifies interface design for standard BCD sources. Consider the ripple-blanking feature for leading zero suppression applications. Verify that the TTL voltage levels match the system logic family requirements.

Display Drivers Part Context

This component is part of the DM7447A family of BCD-to-seven-segment decoders. It shares functional similarities with the DM7446A but differs in output polarity. The 'DM' prefix typically denotes National Semiconductor or Fairchild Semiconductor manufacturing origins. It serves as a legacy solution for digital display interfacing in industrial and consumer electronics.

Display Drivers Replacement Considerations

SN54LS247 by Texas Instruments offers similar BCD-to-seven-segment decoding functionality. SN54LS347 is another alternative providing comparable decoding features. Verify pinout compatibility and output current capabilities before substitution.