NXP Semiconductors 34972
The 34972 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. | 34972 |
|---|---|
| Datasheet | 34972 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)
● Eight programmable inputs (switches to supply 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 MULTIPLE SWITCH DETECTION INTERFACE EW SUFFIX (Pb-FREE) 98ARH99137A 32-PIN SOICW EK SUFFIX (Pb-FREE) 98ASA10556D 32-PIN SOICW EP ORDERING INFORMATION Device Temperature Range (TA) Package MC34972ATEW/R2 MC34972ATEK/R2 -40 to 85 °C 32 SOICW 32 SOICW EP VPWR VPWR 34972 SP0 VPWR SP1 VDD SP7 WAKE SG0 SG1 SG12 SG13 SI SCLK CS SO INT AMUX GND VPWR VDD VDD POWER SUPPLY LVI ENABLE MCU MOSI SCLK CS MISO INT AN0 WATCHDOG RESET Figure 1. 34972 Simplified Application Diagram Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to permit improvements in the design of its products. © Freescale Semiconductor, Inc., 2013.
