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/Description | Type | Modified Date |
|---|---|---|
| MC33978, 22 Channel Switch Detection Interface with Programmable Wetting Current - Data Sheet (REV 5.0) PDF (1.9 MB) MC33978 | Data Sheets | 11 Aug 2015 |
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| MC33978, 22 Channel Switch Detection Interface with Programmable Wetting Current - Data Sheet (REV 5.0) PDF (1.9 MB) MC33978 | 11 Aug 2015 |
Errata (1)
| Name/Description | Modified Date |
|---|---|
| MC33978ER, MC33978 Mask N11P - Errata (REV 1.0) PDF (111.9 kB) MC33978ER | 22 Jun 2015 |
Application Notes (2)
| Name/Description | Modified 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) AN1902 | 13 Oct 2014 |
| AN4388, Quad Flat Package (QFP) - Application Note (REV 2.0) PDF (1.7 MB) AN4388 | 20 Feb 2014 |
Ordering Information
| Product | Status | Status | Device Function | Budgetary Price excluding tax(US$) | Package Type and Termination Count | Load Supply Voltage (Min) (V) | Load Supply Voltage (Max) (V) | Supply Voltage (Min-Max) (V) | Interface and Input Control | Switch Monitoring Voltage (Min-Max) (V) (VSENSE) | Ambient Operating Temperature (Min-Max) (°C) | Protection | Diagnostics | Additional Features-Analog | ADC Dynamic Range (dB) | ADC SNR (dB) | DAC Dynamic Range (dB) | DAC SNR (dB) | Frequency Band (Min-Max) (MHz) | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MC34978AESR2 | Active | Switch Monitoring | 1K @ US$1.98 | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC34978AEKR2 | Active | Switch Monitoring | 1K @ US$1.87 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC34978AEK | Active | Switch Monitoring | 1K @ US$1.87 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC34978AES | Active | Switch Monitoring | 1K @ US$1.98 | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC34978EKR2 | No Longer Manufactured | Switch Monitoring | 1K @ US$1.63 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC34978EK | No Longer Manufactured | Switch Monitoring | 1K @ US$1.63 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC34978ESR2 | No Longer Manufactured | Switch Monitoring | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | ||||||||||
| MC34978ES | No Longer Manufactured | Switch Monitoring | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 85 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] |
Package Information
| Package Description | Outline Version | Packing | Product Status | Part Number | Chemical Content | RoHS / Pb FreeChina RoHS Lookup | MSL | PPT (°C) |
|---|---|---|---|---|---|---|---|---|
| SOIC 32 300ML 4.7EP | 98ASA10556D | MPQ - 42 RAILPOQ - 3360 BOX | Active | MC34978AEK | MC34978AEK.pdf |   | 3 | 260 |
| MPQ - 1000 REELPOQ - 1000 BOX | Active | MC34978AEKR2 | MC34978AEKR2.pdf | | 3 | 260 | ||
| MPQ - 1000 REELPOQ - 1000 BOX | No Longer Manufactured | MC34978EKR2 | MC34978EKR2.pdf | | 3 | 260 | ||
| MPQ - 42 RAILPOQ - 2100 BOX | No Longer Manufactured | MC34978EK | MC34978EK.pdf | | 3 | 260 | ||
| 32QFN-EP 5*5*0.85P0.5 SC | 98ASA00656D | MPQ - 490 TRAYPOQ - 4900 BOX | Active | MC34978AES | MC34978AES.pdf | | 3 | 260 |
| MPQ - 5000 REELPOQ - 5000 BOX | Active | MC34978AESR2 | MC34978AESR2.pdf | | 3 | 260 | ||
| No Longer Manufactured | MC34978ES | MC34978ES.pdf | | 3 | 260 | |||
| No Longer Manufactured | MC34978ESR2 | MC34978ESR2.pdf | | 3 | 260 |
- 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
