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KIT33978EKEVB

Description
Interface Development Tools KITUSBSPIDGLEVME
CategoryDevelopment board/suite/development tools   
File Size1MB,65 Pages
ManufacturerNXP
Websitehttps://www.nxp.com
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Interface Development Tools KITUSBSPIDGLEVME

KIT33978EKEVB Parametric

Parameter NameAttribute value
Product CategoryInterface Development Tools
ManufacturerNXP
RoHSDetails
PackagingBulk
Factory Pack Quantity1
Unit Weight8 oz
NXP Semiconductors
Technical Data
Document Number: MC33978
Rev. 8.0, 7/2018
22 channel multiple switch detection
interface with programmable wetting
current
The 33978 is designed to detect the closing and opening of up to 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 analog multiplexer for reading the
input channels as analog inputs. The analog 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. A battery and temperature monitor are included in the IC and
available via the AMUX pin.
The 33978 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.
Features
• Fully functional operation 4.5 V ≤ V
BATP
≤ 36 V
• Full parametric operation 6.0 V ≤ V
BATP
≤ 28 V
• Operating switch input voltage range from -1.0 V to 36 V
• Eight programmable inputs (switches to battery or ground)
• 14 switch-to-ground inputs
• Selectable wetting current (2, 6, 8, 10, 12, 14, 16, or 20 mA)
• Interfaces directly to an MCU using 3.3 V / 5.0 V SPI protocol
• Selectable wake-up on change of state
• Typical standby current I
BATP
= 30
μA
and I
DDQ
= 10
μA
• Active interrupt (INT_B) on change-of-switch state
• Integrated battery and temperature sensing
33978
34978
MULTIPLE SWITCH DETECTION INTERFACE
EK SUFFIX (PB-FREE)
98ASA10556D
32-PIN SOICW-EP
ES SUFFIX (PB-FREE)
98ASA00656D
32-PIN QFN (WF-TYPE)
Applications
• Automotive
• Heating ventilation and air conditioning (HVAC)
• Lighting
• Central gateway/in-vehicle networking
• Gasoline engine management
• Industrial
• Programmable logic control (PLC)
• Process control, temperature control
• Input-output control (I/O Control)
• Single board computer
• Ethernet switch
Notes
1. The IC is functional from 4.5 V < V
BATP
< 6.0 V, but with degraded parametric values. The parameters may not meet the minimum and maximum
specifications when VBATP drops below 6.0 V.
V
DDQ
Battery
Power
Supply
SG1
33978
Battery
SP0
VBATP
WAKE_B
Power
Supply
SP1
MCU
VDDQ
INT_B
CS_B
MISO
MOSI
SCLK
AMUX
INTB
CSB
MISO
MOSI
SCLK
AN0
SP7
SG0
SG12
SG13
EP
GND
Figure 1. 33978 simplified application diagram
© NXP B.V. 2018.

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Description Interface Development Tools KITUSBSPIDGLEVME Interface - Specialized BL Advanced Automotive Analog Interface - Specialized BL Advanced Automotive Analog Interface - Specialized Switch Detection Interface, 22-switches, 3.3 V / 5.0 V SPI , QFN32, Reel Interface - Specialized Analog Switch Detection Interface USB Interface IC USB to Serial UART Enhanced IC SSOP-28 Interface Development Tools Evaluation Kit - MC34978, Switch Detection Interface, 22-switches Interface - Specialized Switch Detection Interface, 22-switches, 3.3 V / 5.0 V SPI , QFN32 Circuit Board Hardware - PCB MINI SMT TEST POINT Switching Voltage Regulators 42V,3A PWR MODULE
Product Category Interface Development Tools - Interface - Specialized Interface - Specialized Interface - Specialized - Interface Development Tools - - Interface - Specialized
Manufacturer NXP - NXP NXP NXP - NXP - - NXP
Factory Pack Quantity 1 - 1000 1000 490 - 1 - - 42
Unit Weight 8 oz - 0.017334 oz 0.002247 oz 0.002247 oz - 0.800000 oz - - 0.017334 oz
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