4511BDC

Overview

The CD4511BDC is a BCD to seven-segment decoder and driver manufactured by National Semiconductor. It accepts a 4-bit Binary-Coded Decimal input and drives common-cathode LED displays. The device features latch control for data storage, lamp test functionality, and blanking inputs. It operates within a supply voltage range of +3V to +15V. The component is housed in a DIP-16 package.

Feature Summary

• Converts 4-bit binary-coded decimal inputs into segment outputs for 7-segment displays
• Includes internal latching mechanism to store display data
• Provides dedicated lamp test and blanking control inputs

Applications

• Digital clock displays
• Numeric readouts on electronic instruments
• Seven-segment indicator panels

Procurement Notes

Verify the manufacturer origin as National Semiconductor or successor entities like Texas Instruments. Confirm the package type matches the required DIP-16 footprint. Ensure the suffix 'DC' corresponds to the specific tape-and-reel or tube packaging variant required for the assembly process. Check RoHS compliance status against current regulatory requirements.

Selection Notes

Select this component when driving common-cathode LEDs with a BCD source. Verify that the supply voltage aligns with the +3V to +15V operating range. Consider the output current capability relative to the LED brightness requirements. Ensure the DIP-16 package fits the available PCB space and soldering method.

Part Context

This part belongs to the CMOS 4000-series logic family. It serves as a dedicated interface between digital logic circuits and visual numeric displays. The design simplifies circuitry by integrating decoding and driving functions into a single integrated circuit.

Replacement Considerations

Compatible substitutes include the SN74LS48 for TTL applications, though voltage levels differ. CMOS equivalents such as the HEF4511 or TC4511 offer pin-compatible replacements with similar electrical characteristics.