MC34978: Switch Detection Interface, 22 I/Os, Programmable Wetting Current, Temp Sensor, 3.3 V / 5.0 V SPI

The NXP® MC34978 is a multiple switch detection interface (MSDI) designed to detect the closing and opening of up to 22 switch contacts in industrial environments.

MC34978: Product Block Diagram
MC33978: 22 I/O Switch Detection Interface
特性
  • Designed to operate 4.5 V ≤ VBATP ≤ 36 V
  • Switch input voltage range -14 V to VPWR, 36 V Max.
  • Interfaces directly to an MCU using 3.3 V / 5.0 V SPI protocol
    • Selectable wake-up on change of state
    • Selectable wetting current (2, 6, 8, 10, 12, 14, 16, or 20 mA)
  • Selectable wake-up on change of state
  • Selectable wetting current (2, 6, 8, 10, 12, 14, 16, or 20 mA)
  • 8 programmable inputs (switches to battery or ground) and 14 switch-to-ground inputs
  • Typical standby current - VBATP = 30 uA and VDD = 10 uA
  • Integrated battery and temperature sensing
Recommended Documentation (1)
Name/DescriptionTypeModified Date
MC33978, 22 Channel Switch Detection Interface with Programmable Wetting Current - Data Sheet (REV 5.0) PDF (1.9 MB) MC33978Data Sheets11 Aug 2015
Data Sheets (1)
Name/DescriptionModified Date
MC33978, 22 Channel Switch Detection Interface with Programmable Wetting Current - Data Sheet (REV 5.0) PDF (1.9 MB) MC3397811 Aug 2015
Errata (1)
Name/DescriptionModified Date
MC33978ER, MC33978 Mask N11P - Errata (REV 1.0) PDF (111.9 kB) MC33978ER22 Jun 2015
Application Notes (2)
Name/DescriptionModified Date
AN1902, Assembly Guidelines for QFN (Quad Flat No-Lead) and DFN (Dual Flat No-Lead) Packages - Application Note (REV 7.0) PDF (3.6 MB) AN190213 Oct 2014
AN4388, Quad Flat Package (QFP) - Application Note (REV 2.0) PDF (1.7 MB) AN438820 Feb 2014
Ordering Information
ProductStatusStatusDevice FunctionBudgetary Price excluding tax(US$)Package Type and Termination CountLoad Supply Voltage (Min) (V)Load Supply Voltage (Max) (V)Supply Voltage (Min-Max) (V)Interface and Input ControlSwitch Monitoring Voltage (Min-Max) (V) (VSENSE)Ambient Operating Temperature (Min-Max) (°C)ProtectionDiagnosticsAdditional Features-AnalogADC Dynamic Range (dB)ADC SNR (dB)DAC Dynamic Range (dB)DAC SNR (dB)Frequency Band (Min-Max) (MHz)RoHS
MC34978AESR2ActiveSwitch Monitoring1K @ US$1.98QFN-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978AEKR2ActiveSwitch Monitoring1K @ US$1.87SOIC-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978AEKActiveSwitch Monitoring1K @ US$1.87SOIC-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978AESActiveSwitch Monitoring1K @ US$1.98QFN-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978EKR2No Longer ManufacturedSwitch Monitoring1K @ US$1.63SOIC-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978EKNo Longer ManufacturedSwitch Monitoring1K @ US$1.63SOIC-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978ESR2No Longer ManufacturedSwitch MonitoringQFN-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
MC34978ESNo Longer ManufacturedSwitch MonitoringQFN-EP 324.536SPI-40 to 85Overtemperature, Overvoltage, Undervoltage DetectionPulse wetting current, Wake[object Object]
Package Information
Package DescriptionOutline VersionPackingProduct StatusPart NumberChemical ContentRoHS / Pb FreeChina RoHS LookupMSLPPT (°C)
SOIC 32 300ML 4.7EP98ASA10556DMPQ - 42 RAILPOQ - 3360 BOXActiveMC34978AEKMC34978AEK.pdf3260
MPQ - 1000 REELPOQ - 1000 BOXActiveMC34978AEKR2MC34978AEKR2.pdf3260
MPQ - 1000 REELPOQ - 1000 BOXNo Longer ManufacturedMC34978EKR2MC34978EKR2.pdf3260
MPQ - 42 RAILPOQ - 2100 BOXNo Longer ManufacturedMC34978EKMC34978EK.pdf3260
32QFN-EP 5*5*0.85P0.5 SC98ASA00656DMPQ - 490 TRAYPOQ - 4900 BOXActiveMC34978AESMC34978AES.pdf3260
MPQ - 5000 REELPOQ - 5000 BOXActiveMC34978AESR2MC34978AESR2.pdf3260
No Longer ManufacturedMC34978ESMC34978ES.pdf3260
No Longer ManufacturedMC34978ESR2MC34978ESR2.pdf3260
MC33978, 22 Channel Switch Detection Interface with Programmable Wetting Current - Data Sheet MC34978
MC33978ER, MC33978 Mask N11P - Errata MC34978
AN1902, Assembly Guidelines for QFN (Quad Flat No-Lead) and DFN (Dual Flat No-Lead) Packages - Application Note mc33882
AN4388, Quad Flat Package (QFP) - Application Note mc34sb0800
98ASA10556D MC33905
MC34978AEK.pdf MC34978
MC34978AEKR2.pdf MC34978
MC34978EKR2.pdf MC34978
MC34978EK.pdf MC34978
98ASA00656D s12zvl
MC34978AES.pdf MC34978
MC34978AESR2.pdf MC34978
MC34978ES.pdf MC34978
MC34978ESR2.pdf MC34978