CD4050BE (Hex Non-Inverting Buffer / Logic Level Converter IC - 16-Pin DIP Package)

If you are trying to connect a modern 3.3V component—like an SD card module, a TFT LCD screen, or an ESP32—to a classic 5V Arduino Uno, you face a major problem. Sending a raw 5V signal directly into a 3.3V pin will almost certainly destroy the component. The CD4050 is the classic, foolproof silicon solution. It is a hex non-inverting buffer, meaning it contains six completely independent channels that take an incoming signal and pass it through perfectly unchanged (High stays High, Low stays Low).

However, the superpower of the CD4050 is its unique input structure. The input pins are specifically designed to safely accept voltages higher than the chip's own power supply (VDD), up to a maximum of 15V. If you power the CD4050 with 3.3V, you can safely blast 5V logic signals into its inputs. The chip will neatly "clip" the signal and output a perfectly safe, strong 3.3V signal to your delicate module. Because it has six channels, a single chip is perfectly sized to drop down all the necessary lines for a high-speed SPI connection (MOSI, SCK, CS) with pins to spare.

Key Features & Functional Advantages:

• High-to-Low Voltage Conversion: The inputs can safely withstand up to 15V regardless of the supply voltage. This makes it the absolute best chip for safely stepping 5V logic down to 3.3V logic.

• Six Independent Channels (Hex): Packs six separate buffers into a single 16-pin package, providing enough channels to level-shift complex data buses like SPI or multiple UART lines simultaneously.

• Non-Inverting Logic: Does not flip your data. The 1s and 0s you send into the chip are exactly the 1s and 0s that come out.

• Signal Buffering & Cleaning: Revitalizes weak digital signals, making it excellent for driving signals over longer wires or triggering multiple downstream logic gates without voltage drop.

• Breadboard Native (16-DIP): Sized perfectly for standard 0.1-inch (2.54mm) solderless breadboards, allowing for rapid, reliable prototyping without the need for tiny SMD level-shifting boards.

Perfect For:

• SD Card Interfacing: The mandatory hardware bridge for connecting 3.3V SD and MicroSD card breakouts to 5V Arduino platforms for data logging.

• TFT & OLED Displays: Safely steps down the fast SPI control signals (Data, Clock, Chip Select, Reset) required to drive modern color displays.

• Protecting 3.3V Microcontrollers: Acts as a solid, permanent logic barrier when interfacing 5V industrial sensors with an ESP32, ESP8266, or Raspberry Pi.

• Cable Driving: Boosting the current of weak microcontroller pins to send sharp, clean square waves down a long ribbon cable.

Technical Specifications:

• Logic Family: CD4000 Series (CMOS)

• Logic Function: Hex Non-Inverting Buffer / Converter

• Number of Channels: 6 (Hex)

• Operating Supply Voltage (Vdd): 3V to 15V DC

• Maximum Input Voltage: 15V (Regardless of Vdd)

• Maximum Output Current: ~8mA per pin (Sufficient for logic signaling, but not for driving motors or large relays)

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

• Mounting Type: Through-Hole (PTH)

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