MC33978: 22 I/O MSDI Programmable Current Analog Mux
The NXP® MC33978 is a multiple switch detection interface (MSDI) 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 through a SPI in automotive environments.
MC33978: 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 (4)
| Name/Description | Modified Date |
|---|---|
| AN5195, MC33978 Low-power Mode Operation - Application Note (REV 1.0) PDF (346.8 kB) AN5195 | 29 Sep 2015 |
| AN5098, MC33978 Power Consumption Calculation - Application Note (REV 1.0) PDF (2.2 MB) AN5098 | 24 Mar 2015 |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MC33978AEK | Active | Switch Monitoring | 1K @ US$2.15 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC33978AESR2 | Active | Switch Monitoring | 1K @ US$2.29 | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC33978AEKR2 | Active | Switch Monitoring | 1K @ US$2.15 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC33978AES | Active | Switch Monitoring | 1K @ US$2.29 | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC33978EK | No Longer Manufactured | Switch Monitoring | 1K @ US$1.89 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC33978EKR2 | No Longer Manufactured | Switch Monitoring | 1K @ US$1.89 | SOIC-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | |||||||||
| MC33978ESR2 | No Longer Manufactured | Switch Monitoring | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 125 | Overtemperature, Overvoltage, Undervoltage Detection | Pulse wetting current, Wake | [object Object] | ||||||||||
| MC33978ES | No Longer Manufactured | Switch Monitoring | QFN-EP 32 | 4.5 | 36 | SPI | -40 to 125 | 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 - 1000 REELPOQ - 1000 BOX | Active | MC33978AEKR2 | MC33978AEKR2.pdf |   | 3 | 260 |
| MPQ - 42 RAILPOQ - 3360 BOX | Active | MC33978AEK | MC33978AEK.pdf | | 3 | 260 | ||
| MPQ - 42 RAILPOQ - 2100 BOX | No Longer Manufactured | MC33978EK | MC33978EK.pdf | | 3 | 260 | ||
| MPQ - 1000 REELPOQ - 1000 BOX | No Longer Manufactured | MC33978EKR2 | MC33978EKR2.pdf | | 3 | 260 | ||
| 32QFN-EP 5*5*0.85P0.5 SC | 98ASA00656D | MPQ - 5000 REELPOQ - 5000 BOX | Active | MC33978AESR2 | MC33978AESR2.pdf | | 3 | 260 |
| MPQ - 490 TRAYPOQ - 2450 BOX | Active | MC33978AES | MC33978AES.pdf | | 3 | 260 | ||
| No Longer Manufactured | MC33978ES | MC33978ES.pdf | | 3 | 260 | |||
| No Longer Manufactured | MC33978ESR2 | MC33978ESR2.pdf | | 3 | 260 |
- MC33978ER, MC33978 Mask N11P - Errata MC34978
- AN5195, MC33978 Low-power Mode Operation - Application Note MC33978
- AN5098, MC33978 Power Consumption Calculation - Application Note MC33978
- 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
- MC33978AEKR2.pdf MC33978
- MC33978AEK.pdf MC33978
- MC33978EK.pdf MC33978
- MC33978EKR2.pdf MC33978
- 98ASA00656D s12zvl
- MC33978AESR2.pdf MC33978
- MC33978AES.pdf MC33978
- MC33978ES.pdf MC33978
- MC33978ESR2.pdf MC33978
