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CD4511BE (BCD to 7-Segment Latch/Decoder/Driver IC - 16-Pin DIP Package)

K-TECHNICS
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KSh100.00

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Driving a single 7-segment display directly from a microcontroller eats up seven valuable GPIO pins. If you want to build a 4-digit clock or a digital scoreboard, you would instantly run out of pins. The CD4511 is the classic, elegant hardware solution to this problem. It is a BCD (Binary Coded Decimal) to 7-segment decoder. Instead of controlling each LED segment individually, you simply send the chip a 4-bit binary number (for example, sending "0111" tells the chip you want the number "7"). The CD4511 instantly decodes that binary input and automatically powers the correct combination of segments to display the number.

Beyond simple decoding, the CD4511 features a built-in Data Latch. By pulsing the Latch Enable (LE) pin, the chip will take a "snapshot" of the current binary number and hold it on the display indefinitely. This allows your microcontroller to quickly update a display and then immediately move on to reading sensors or running motors without having to constantly refresh the LEDs. Built on rugged CMOS architecture, it can operate on everything from a 3V battery pack up to an 18V industrial supply, making it incredibly versatile.

Key Features & Functional Advantages:

  • Pin-Saving BCD Input: Reduces the number of control lines required to display a digit from seven down to just four (plus a latch pin).

  • Integrated Data Latch: Frees up microcontroller processing time by holding the current number on the display automatically.

  • Direct LED Driving: Capable of sourcing up to 25mA of current per output pin, meaning it can drive standard LED segments directly (though you must still use current-limiting resistors).

  • Lamp Test & Blanking Pins: Features a dedicated "Lamp Test" (LT) pin to force all segments ON (to check for dead LEDs), and a "Blanking" (BL) pin to completely turn the display OFF to save power or create flashing effects.

  • Wide Operating Voltage: The CMOS design allows it to run smoothly anywhere between 3V and 18V DC.

Perfect For:

  • Digital Clocks & Counters: The standard hardware companion for translating the binary output from counting chips (like the CD4029) into human-readable numbers.

  • DIY Scoreboards & Readouts: Easily cascaded to build massive multi-digit displays for games, sports, and industrial readouts.

  • Microcontroller Pin Expansion: A highly efficient way to drive multiple numeric displays using only a handful of pins on an Arduino or ESP32.

  • Educational Prototyping: The quintessential chip used in STEM classrooms to teach students the relationship between binary counting and decimal outputs.

Technical Specifications:

  • Logic Family: CD4000 Series (CMOS)

  • Logic Function: BCD-to-7-Segment Latch/Decoder/Driver

  • Compatible Display Type: Common Cathode (It sources current out to the display)

  • Operating Supply Voltage (Vdd): 3V to 18V DC

  • Maximum Output Current: ~25mA per segment

  • Input Logic: 4-Bit BCD (Pins A, B, C, D)

  • Package / Case: 16-DIP (0.300", 7.62mm width)

  • Mounting Type: Through-Hole (PTH)

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