NXP Semiconductors 33972
The 33972 Multiple Switch Detection Interface with suppressed wake-up 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). The device also features a 22-to-1 analog multiplexer for reading inputs as analog.| Part No. | 33972 |
|---|---|
| Datasheet | 33972 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Multiple Switch Detection Interface |
| Buy | Stock & Price |
FEATURES
● Designed to operate 5.5 V VPWR 26 V● Switch input voltage range -14 V to VPWR, 40 V Max
● Interfaces directly to MPU using 3.3 V/5.0 V SPI protocol
● Selectable wake-up on change of state
● Selectable wetting current (16 or 2.0 mA)
● 8 programmable inputs (switches to battery or ground)
● 14 switch-to-ground inputs
● Typical standby current - VPWR = 100 A and VDD = 20 A
● Active interrupt (INT) on change-of-switch state Document Number: MC33972 Rev. 20, 8/2023 33972/A/T MULTIPLE SWITCH DETECTION INTERFACE EW SUFFIX (Pb-FREE) 98ARH99137A 32-PIN SOICW EK SUFFIX (Pb-FREE) 98ASA00259D 32-PIN SOICW EP ORDERING INFORMATION Device Temperature Range (TA) Package MC33972TEW/R2 MC33972ATEW/R2 -40 to 125 °C 32 SOICW MC33972ATEK/R2 32 SOICW EP VBAT VBAT 33972 SP0 VPWR SP1 VDD SP7 WAKE SG0 SG1 SG12 SG13 SI SCLK CS SO INT AMUX GND VBAT VDD VDD POWER SUPPLY LVI ENABLE MCU MOSI SCLK CS MISO INT AN0 WATCHDOG RESET Figure 1. 33972 Simplified Application Diagram © 2023 NXP B.V. DEVICE VARIATIONS Table 1.
