Overview
The MC33CD1030AE, produced by NXP USA Inc., is a sophisticated 33-channel multiple switch detection interface designed to detect the closing and opening of up to 33 switch contacts. This SMARTMOS device communicates the switch status to a microprocessor unit (MCU) via a serial peripheral interface (SPI). It features a 35-to-1 analog multiplexer, allowing the MCU to read input channels as analog inputs, and includes integrated battery and temperature monitoring capabilities. The device operates in multiple modes, including Normal mode, Low-power mode (LPM), and Polling mode, making it suitable for applications requiring low power consumption and high functionality.
Key Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage Range | 4.5 V to 36 V (full parametric operation from 6.0 V to 28 V) |
| Operating Temperature Range | -40 °C to 125 °C |
| Number of Switch Detection Channels | 33 (21 switch-to-Ground, 12 programmable switch inputs) |
| Switch Input Voltage Range | -1.0 V to 36 V |
| Wetting Current Options | 2.0, 6.0, 8.0, 10, 12, 14, 16, or 20 mA (selectable pulse or continuous) |
| Analog Multiplexer | 35-to-1 with buffered AMUX output |
| Low-power Mode Current | IBATP = 50 μA, IDDQ = 10 μA |
| Package Type | LQFP 48 pins |
| Interface Type | 3.3 V / 5.0 V SPI protocol |
Key Features
- Fully functional operation from 4.5 V to 36 V and full parametric operation from 6.0 V to 28 V.
- Low-power mode with IBATP = 50 μA and IDDQ = 10 μA, ideal for automotive and industrial applications.
- 33 switch detection channels with configurable pull-up current sources and selectable wetting current.
- 35-to-1 analog multiplexer with buffered AMUX output for reading input channels as analog inputs.
- Integrated battery and temperature monitoring through the AMUX pin.
- Active interrupt (INT_B) on switch's change of state.
- Direct MCU interface through 3.3 V / 5.0 V SPI protocol.
- Multiple modes of operation: Normal mode, Low-power mode (LPM), and Polling mode.
Applications
The MC33CD1030AE is particularly suited for automotive and industrial applications where multiple switch detection and low power consumption are critical. It can be used in various systems such as:
- Automotive control systems requiring multiple switch inputs.
- Industrial control panels and automation systems.
- Battery management systems due to its integrated battery monitoring capability.
- Temperature monitoring and control systems.
Q & A
- What is the primary function of the MC33CD1030AE?
The MC33CD1030AE is designed to detect the closing and opening of up to 33 switch contacts and communicate the switch status to a microprocessor unit via SPI.
- What are the operating voltage and temperature ranges of the MC33CD1030AE?
The device operates from 4.5 V to 36 V and has an operating temperature range of -40 °C to 125 °C.
- How many switch detection channels does the MC33CD1030AE have?
The device has 33 switch detection channels, including 21 switch-to-Ground and 12 programmable switch inputs.
- What are the wetting current options for the MC33CD1030AE?
The device offers selectable wetting currents of 2.0, 6.0, 8.0, 10, 12, 14, 16, or 20 mA, with options for pulse or continuous operation.
- Does the MC33CD1030AE support low-power mode?
- What interface type does the MC33CD1030AE use?
The device uses a 3.3 V / 5.0 V SPI protocol for communication with the MCU.
- What additional monitoring capabilities does the MC33CD1030AE have?
The device includes integrated battery and temperature monitoring capabilities through the AMUX pin.
- What are the different modes of operation for the MC33CD1030AE?
The device operates in Normal mode, Low-power mode (LPM), and Polling mode.
- Is the MC33CD1030AE RoHS compliant?
- What is the package type of the MC33CD1030AE?
The device is packaged in a 48-pin LQFP.
