CD4049

The CD4049 is a component from the CMOS (Complementary Metal-Oxide-Semiconductor) 4000 series and is a Hex Inverting Buffer/Converter. It is a low-power digital IC, much like the 74LS series chips, and is highly relevant to the low-voltage control and protection logic.

Here are its core specifications and relevance:

• Type: Logic Buffer / Digital Integrated Circuit (IC).

• Function: Contains six independent inverting buffers. It takes a digital input and outputs its logical opposite (a NOT gate).

• Family:CMOS (4000 Series), known for very low static power consumption and wide operating voltage range.

• Supply Voltage (V_DD): Extremely wide, typically 3V to 15V (making it more flexible than 5V TTL).

• Package: Standard DIP-16

• Relevance to Safety/Protection: In the inverter control circuitry, the CD4049 would be used for:

  • Level Translation: Converting voltage levels between different parts of the control board (e.g., from a high-voltage sensor circuit down to a microcontroller 3.3V logic, relevant to the Isolation requirement).

  • Signal Inversion: Creating required inverted signals for gate drivers or fault-latching logic.

  • Signal Buffering: Providing current drive capability to sharpen rise/fall times or drive multiple loads, ensuring the integrity of control signals vital for the thermal Protection logic (preventing false or failed shutdowns when the core temperature exceeds120C).