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MC34978AES

The NXP Semiconductors MC34978AES is a 22-channel multiple switch detection interface IC. It features programmable wetting current and operates over a wide voltage range.

✓ Total Stock: 980 pcs

$ Price Range: $6.39

MC34978AES Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Flip Electronics ✓ Non-Authorised Inventory information	980 pcs On Request	980 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

MC34978AES Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	Specialized
Manufacturer Name	NXP Semiconductors
Applications	Multiple Switch Detection
Lead Spacing	5 mm
Mounting Type	Surface Mount, Wettable Flank
Supplier Device Package	32-QFN-EP (5x5)
Supplier Package	32-QFN-EP (5x5)
Voltage	4.5V ~ 36V

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MC34978AES Description

Short technical summary and product information.

The MC34978AES from NXP Semiconductors is a specialized interface integrated circuit designed for detecting the status of up to 22 switch contacts. It transfers switch status (open or closed) to a microprocessor unit (MCU) via a serial peripheral interface (SPI).

Key features include individually selectable input currents in Normal and Low-power modes, a 24-to-1 analog multiplexer for reading analog inputs, and integrated battery and temperature monitoring. The device supports multiple modes of operation: Normal, Low-power (LPM), and Polling.

This IC is functional from 4.5 V to 36 V, with full parametric operation from 6.0 V to 28 V. It offers low-power mode currents of 30 μA (IBATP) and 10 μA (IDDQ). The switch detection includes 14 Switch-to-Ground (SG) inputs and 8 Programmable (SP) inputs, with an operating switch input voltage range from -1.0 V to 36 V. Selectable wetting currents range from 2 mA to 20 mA, with programmable pulse or continuous operation.

The MC34978AES is supplied in a 32-VFQFN Exposed Pad package suitable for surface mounting. It is designed for applications requiring robust switch monitoring and status transfer.

MC34978AES Quick Information

Product Type: Specialized Interface IC

Canonical Name: MC34978AES 22-channel multiple switch detection interface with programmable wetting current

Subcategory: Specialized

MC34978AES Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

MC34978AES Estimated Pricing

Qty	Low	High
1+	$6.39	$6.39

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

MC34978AES Features

22-channel switch detection interface.
Programmable wetting current from 2-20 mA.
Wide operating voltage range of 4.5 V to 36 V.
Integrated 24-to-1 analog multiplexer.
Low-power mode with low quiescent current.

MC34978AES Applications

Ideal for automotive switch monitoring.
Suitable for industrial control systems.
Used in applications requiring status detection.
Facilitates MCU interface for switch inputs.

MC34978AES FAQs

6 frequently asked questions generated from this part’s specifications.

What is the operating voltage range for the MC34978AES?

The MC34978AES 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 MC34978AES offer?

The MC34978AES provides 22 switch detection channels.

What is the selectable wetting current range?

The selectable wetting current ranges from 2 mA to 20 mA.

What package type is the MC34978AES available in?

The MC34978AES is available in a 32-VFQFN Exposed Pad package.

What is the RoHS status of the MC34978AES?

The RoHS status is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for this component?

The Moisture Sensitivity Level (MSL) is 1 Unlimited.