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NXP MC34978AEK
Specialized Interface, SPI
- Manufacturer:
- NXP NXP
- Manufacturer Part No:
- MC34978AEK
- Order Code:
- 4262312
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- Product Range
- -
- Technical Datasheet:
- MC34978AEK Datasheet
- ECAD / MCAD
-
Product Overview
MC34978AEK is a 22 channel multiple switch detection interface with programmable wetting current. It is designed to detect the closing and opening of upto 22 switch contacts. The switch status, either open or closed, is transferred to the microprocessor unit (MCU) through a serial peripheral interface (SPI). This SMARTMOS device also features a 24-to-1 analogue multiplexer for reading the input channels as analogue inputs. The analogue selected input signal is buffered and provided on the AMUX output pin for the MCU to read. Independent programmable wetting currents are available as needed for the application. This device has two modes of operation, normal and low-power mode (LPM). Normal mode allows programming of the device and supplies switch contacts with pull-up or pull-down current as it monitors the change of state on the switches. The LPM provides low quiescent current, which makes the 33978 ideal for automotive and industrial products requiring low sleep-state currents.
- Fully functional operation 4.5V ≤ VBATP ≤ 36V
- Full parametric operation 6.0V ≤ VBATP ≤ 28V
- Operating switch input voltage range from -1.0V to 36V
- Eight programmable inputs (switches to battery or ground)
- 14 switch-to-ground inputs
- Interfaces directly to an MCU using 3.3V / 5.0V SPI protocol
- Selectable wake-up on change of state
- Typical standby current IBATP = 30μA and IDDQ = 10μA
- Active interrupt (INT-B) on change-of-switch state, integrated battery and temperature sensing
- 32pins SOICW-EP, temperature range from -40°C to 105°C
Product Information
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- :
- SPI
- :
- Automotive Systems, HVAC, Industrial Control Systems, Lighting, PLC, Process Control
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- 3.1V
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- 5.25V
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- WSOIC-EP
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- 32Pins
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- -40°C
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- 105°C
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- -
- :
- -
Technical Documents (2)
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Extra stock is available upon order to the Supplier Lead Time which is approximately 10/27/25
5 deliver in 3-4 business days from our UK warehouse
Due to market conditions delivery times are for general guidance only and may be subject to change at short notice
¥698.44
(¥768.28 Inc. JCT)
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| Quantity | Price (Incl JCT) |
|---|---|
| 1+ | ¥698.44 (¥768.28) |
| 10+ | ¥530.64 (¥583.70) |
| 25+ | ¥469.50 (¥516.45) |
| 50+ | ¥459.31 (¥505.24) |
| 100+ | ¥436.81 (¥480.49) |
| 250+ | ¥420.79 (¥462.87) |
| 500+ | ¥418.05 (¥459.86) |
| 1000+ | ¥416.06 (¥457.67) |
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