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MC33978AESR2 The NXP Semiconductors MC33978AESR2 is a 22-channel multiple switch detection interface IC. It features SPI communication and operates over a wide voltage range.
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MC33978AESR2

Available from 1 distributors
Mfr Name: NXP Semiconductors
NXP Semiconductors
The NXP Semiconductors MC33978AESR2 is a 22-channel multiple switch detection interface IC. It features SPI communication and operates over a wide voltage range.
✓ Total Stock: 1,530 pcs
$ Price Range: $6.39

MC33978AESR2 Available from 1 distributor

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1,530 pcs
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MC33978AESR2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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MC33978AESR2 Description

Short technical summary and product information.

The MC33978AESR2 from NXP Semiconductors is a versatile 22-channel multiple switch detection interface designed for applications requiring robust switch status monitoring. It supports up to 22 switch contacts, transferring their open or closed status to a microprocessor unit (MCU) via a serial peripheral interface (SPI).

 

This device offers flexible operation with selectable input currents and multiple modes including Normal, Low-power (LPM), and Polling modes. It can operate fully from 4.5 V to 36 V, with full parametric operation specified from 6.0 V to 28 V. The MC33978AESR2 also includes a 24-to-1 analog multiplexer for reading analog inputs, as well as integrated battery and temperature monitoring.

 

Designed for automotive and industrial products, the low-power mode provides quiescent currents as low as 30 μA (IBATP) and 10 μA (IDDQ), making it ideal for systems requiring low sleep-state currents. The switch input voltage range is -1.0 V to 36 V, with selectable wetting currents from 2 mA to 20 mA.

 

The MC33978AESR2 is supplied in a 32-VFQFN exposed pad package, suitable for surface mounting. Its features make it a comprehensive solution for detecting switch states and monitoring system parameters.

MC33978AESR2 Quick Information

Product Type: Switch Detection Interface IC
Canonical Name: MC33978AESR2 22-Channel Multiple Switch Detection Interface with Programmable Wetting Current
Subcategory: Specialized

MC33978AESR2 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

MC33978AESR2 Estimated Pricing

Qty Low High
1+ $6.39 $6.39

Estimated market price range - modelled values for guidance only, not live distributor offers.

MC33978AESR2 Features

  • Detects up to 22 switch contacts.
  • SPI serial peripheral interface.
  • Wide operating voltage from 4.5V to 36V.
  • Low-power mode with low quiescent current.
  • Integrated analog multiplexer and monitors.

MC33978AESR2 Applications

  • Automotive switch monitoring.
  • Industrial control systems.
  • Battery and temperature sensing.
  • Low-power standby modes.

MC33978AESR2 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the MC33978AESR2?

The MC33978AESR2 is functional from 4.5 V to 36 V, with full parametric operation from 6.0 V to 28 V.

How many switch detection channels does the MC33978AESR2 have?

The MC33978AESR2 features 22 switch detection channels.

What type of interface does the MC33978AESR2 use?

The MC33978AESR2 uses an SPI (Serial Peripheral Interface).

What is the package type for the MC33978AESR2?

The MC33978AESR2 is supplied in a 32-VFQFN Exposed Pad package.

What is the mounting type for the MC33978AESR2?

The MC33978AESR2 is a Surface Mount, Wettable Flank device.

What are the low-power mode currents for the MC33978AESR2?

In low-power mode, the typical IBATP current is 30 μA and the typical IDDQ current is 10 μA.

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