MSDI | NXP

Overview

The NXP^® MC33975 multiple switch detection interface with suppressed wake-up is designed to detect the closing and opening of up to 22 switch contacts, ideal for automotive and industrial products requiring low sleep state currents.

The switch status, open or closed, is transferred to the MPU through a serial peripheral interface
Normal mode allows programming of the device and supplies switch contacts with pullup or pull-down current and Sleep mode provides low quiescent current
The programmable interrupt timer for Sleep mode can be disabled, switch detection currents are 32 mA and 4.0 mA for switch-to-ground inputs, the interrupt bit is a reset bit, and the package is Pb-free

Features

Designed to Operate 5.5 V ≤ VPWR ≤ 28 V
Switch Input Voltage Range -14 V to VPWR, 40 V Max
Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI Protocol
Selectable Wake-Up on Change of State
Selectable Wetting Current (32 mA or 4.0 mA for switch-to-ground inputs)
8 Programmable Inputs (Switches to Battery or Ground)
14 Switch-to-Ground Inputs
VPWR Standby Current 100 µA Typical, VDD Standby Current 20 µA Typical
Pb-Free Packaging Designated by Suffix Code EK
This product is included in NXP^® product longevity program, with assured supply for a minimum of 15 years after launch

Features

Designed to Operate 5.5 V ≤ VPWR ≤ 28 V
Switch Input Voltage Range -14 V to VPWR, 40 V Max
Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI Protocol
Selectable Wake-Up on Change of State
Selectable Wetting Current (32 mA or 4.0 mA for switch-to-ground inputs)
8 Programmable Inputs (Switches to Battery or Ground)
14 Switch-to-Ground Inputs
VPWR Standby Current 100 µA Typical, VDD Standby Current 20 µA Typical
Pb-Free Packaging Designated by Suffix Code EK
This product is included in NXP^® product longevity program, with assured supply for a minimum of 15 years after launch

Key Parametrics