Overview
The MC33CD1030AER2, produced by NXP USA Inc., is a 33-channel multiple switch detection interface (MSDI) designed to detect the closing and opening of up to 33 switch contacts. This SMARTMOS device is particularly suited for automotive and industrial applications, offering advanced features such as programmable wetting currents, a 35-to-1 analog multiplexer, and various modes of operation including Normal, Low-power, and Polling modes. The device communicates with the microprocessor unit (MCU) via a serial peripheral interface (SPI) and includes additional functionalities like battery and temperature monitoring.
Key Specifications
| Parameter | Description |
|---|---|
| Number of Switch Detection Channels | 33 (21 Switch-to-Ground, 12 Programmable Switch) |
| Operating Voltage Range | 4.5 V to 36 V (full parametric operation from 6.0 V to 28 V) |
| Wetting Current Options | 2.0, 6.0, 8.0, 10, 12, 14, 16, or 20 mA |
| Wetting Operation | Pulse or Continuous |
| Analog Multiplexer | 35-to-1 with Buffered AMUX Output |
| Communication Interface | SPI (Serial Peripheral Interface) |
| Low-Power Mode Current | IBATP = 50 μA, IDDQ = 10 μA |
| Switch Input Voltage Range | -1.0 V to 36 V |
| Modes of Operation | Normal, Low-power, Polling |
| Battery and Temperature Monitoring | Available via AMUX pin |
Key Features
- Programmable wetting currents for switch contacts
- 35-to-1 analog multiplexer for reading input channels as analog inputs
- Battery and temperature monitoring capabilities
- Multiple modes of operation: Normal, Low-power, and Polling modes
- Low-power mode with low quiescent current (IBATP = 50 μA, IDDQ = 10 μA)
- Selectable wake-up on change of state
- Overtemperature protection and fault detection
- SPI communication interface for data transfer to the MCU
Applications
The MC33CD1030AER2 is primarily designed for automotive and industrial applications where multiple switch detection is crucial. It is suitable for use in various systems such as:
- Automotive control systems (e.g., dashboard controls, seat adjustments)
- Industrial control panels and machinery
- Automotive safety systems (e.g., airbag systems, anti-lock braking systems)
- Other applications requiring robust and reliable switch detection and monitoring.
Q & A
- What is the primary function of the MC33CD1030AER2?
The primary function is to detect the closing and opening of up to 33 switch contacts. - What are the different modes of operation for the MC33CD1030AER2?
The device operates in Normal, Low-power, and Polling modes. - What is the range of wetting currents available for the switch contacts?
The wetting currents can be set to 2.0, 6.0, 8.0, 10, 12, 14, 16, or 20 mA. - How does the device communicate with the MCU?
The device communicates via a serial peripheral interface (SPI). - What additional monitoring capabilities does the MC33CD1030AER2 offer?
The device includes battery and temperature monitoring capabilities available via the AMUX pin. - What is the operating voltage range for the MC33CD1030AER2?
The device operates from 4.5 V to 36 V, with full parametric operation from 6.0 V to 28 V. - What is the purpose of the Low-power mode?
The Low-power mode reduces the quiescent current to 50 μA (IBATP) and 10 μA (IDDQ), making it ideal for applications requiring low sleep-state currents. - Can the MC33CD1030AER2 detect switches in different configurations?
Yes, it can detect switches in Switch-to-Ground (SG) and Switch-to-Battery (SB) configurations. - What protection features are included in the MC33CD1030AER2?
The device includes overtemperature protection and fault detection mechanisms. - How many analog multiplexer channels are available?
The device features a 35-to-1 analog multiplexer.
