CD4518BE

The CD4518BE is a digital integrated circuit from the CMOS (Complementary Metal-Oxide-Semiconductor) 4000 series and is a Dual BCD Up-Counter. It is a control component, used for timing and sequencing, making it relevant to the system's operational and protection logic.

Here are its core specifications and relevance:

• Type: Dual 4-Bit BCD Up-Counter.

• Function: Contains two independent 4-bit synchronous BCD (Binary-Coded Decimal) counters. Used for dividing clock frequencies or creating sequential delays.

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

• Supply Voltage (V_DD): Wide range, typically 3V to 18V

• Package: Standard 16-pin Dual In-line Package (DIP) (the 'BE' suffix often denotes DIP).

• Relevance to Safety/Compliance: This chip would be integrated into the low-voltage control board to manage timing sequences for safety features:

  • Startup/Shutdown Sequencing: Creating precise, time-delayed steps for soft-starting the inverter or for a controlled shutdown sequence when a fault occurs (like the 120C thermal trip). This ensures components are energized or de-energized in the correct order, adhering to Standards.

  • Frequency Division: Dividing a high-frequency clock signal to generate slower timing events or status indications, which is helpful in implementing safety interlocks.