Texas Instruments CD4511BE CMOS BCD to 7-Segment LED Driver, 3-18V, DIP16

The Texas Instruments CD4511BE is a CMOS BCD to 7-segment LED latch, decoder, and driver presented in a 16-pin DIP package. It integrates CMOS logic with NPN bipolar transistor output devices on a single monolithic structure, combining the low quiescent power dissipation and high noise immunity of CMOS technology with the robust drive capability of bipolar transistors capable of sourcing up to 25mA. This high output current allows the IC to drive LEDs and other display types directly without requiring additional buffer circuits.

The device includes several control inputs for enhanced functionality. A lamp test input allows for testing all segments of the display, while a blanking input can shut off or intensity modulate the output. The latch enable (or strobe) input provides the ability to store a BCD code, enabling the multiplexing of several different signals when used with external multiplexing circuitry. This makes it a versatile choice for complex display systems.

Key technical features include a wide supply voltage range from 3V to 18V, input latches for stable BCD code storage, and extremely low input current. It is 100% tested for quiescent current at 20V and offers reliable performance across a broad operating temperature range from -55°C to 125°C. These characteristics make it suitable for demanding industrial and commercial applications.

With its combination of CMOS efficiency and bipolar drive strength, the CD4511BE provides a reliable and flexible solution for converting binary-coded decimal inputs into the signals needed to illuminate 7-segment displays, simplifying circuit design and improving system reliability.