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The NXP® MC34978AEK is a Multi-Switch Detection Interface (MSDI) device that detects the closure and opening of up to 22 switch contacts in industrial control environments.

- The switch status (on or off) is transmitted to the microprocessor via a serial peripheral interface (SPI).

- The SMARTMOS® device also features a 24-to-1 analogue multiplexer for reading analogue inputs.

- Input currents can be selected one by one in normal mode and low power mode (LPM) according to the application requirements.

- Battery and temperature monitors are included in the IC and are available through the AMUX pin.

- This product can be connected to any microcontroller that supports SPI communication

Key Features

Design operating voltage: 4.5V≤VBATP≤36V

Switching input voltage range: -14V to VPWR, up to 36V

Direct connection to MCU using 3.3V/5V SPI protocol

Wake-up function with state change selectable

Selectable wet current (2, 6, 8, 10, 12, 14, 16 or 20mA)

8 programmable inputs (battery switch or ground switch) and 14 ground switch inputs

Typical standby current: VBATP = 30uA, VDD = 10uA

Integrated battery and temperature sensing

Switch monitoring device functionality

Number of package terminations: 32

HSOP32 and HVQFN32 package types

SPI interface and input control

Load supply voltage 4.5V (min), 36V (max)

Ambient operating temperature: -40°C (min), 85°C (max)

Applications

- Automotive

- Heating, ventilation and air conditioning (HVAC)

- Lighting

- Central Gateway / In-vehicle Network

- Petrol Engine Management

- Industrial

- Programmable Logic Control (PLC)

- Process control, temperature control

- Input and output control (I/O control)

- Single board computers

- Ethernet switches

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.