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33975A - Multiple Switch Detection Interface

Download the 33975A datasheet PDF. This datasheet also covers the 33975 variant, as both devices belong to the same multiple switch detection interface family and are provided as variant models within a single manufacturer datasheet.

General Description

of each terminal can be found in the Functional Terminal Description section on page 11.

8 25 28 9 15, 18 24 16 17 29 30 31 32 Terminal Name GND SI SCLK CS SPn SGn VPWR WAKE INT AMUX VDD SO Formal Name Ground SPI Slave In Serial Clock Chip Select Pr

Key Features

  • a 22-to-1 analog multiplexer for reading inputs as analog. The 33975 device has two modes of operation, Normal and Sleep. Normal mode allows programming of the device and supplies switch contacts with pull-up or pull-down current as it monitors switch change of state. The Sleep mode provides low quiescent current, which makes the 33975 ideal for automotive and industrial products requiring low sleep state currents. Improvements are a programmable interrupt timer for Sleep mode that can be disabl.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (33975_FreescaleSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
33972 Multiple Switch Detection Interface NXP
33972A Multiple Switch Detection Interface NXP
33972T Multiple Switch Detection Interface NXP
33978 22-channel multiple switch detection interface NXP
3390 Optoelectronic Switch - Twilight Sensor Allegro MicroSystems

Other Datasheets by Freescale Semiconductor (now NXP Semiconductors)

Part Number Description
33975 Multiple Switch Detection Interface
33970 Dual Gauge Driver
33972 Multiple Switch Detection Interface
33972A Multiple Switch Detection Interface
33976 Dual Gauge Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
www.DataSheet4U.com Freescale Semiconductor Technical Data Document order number: MC33975 Rev 4.0, 08/2005 Multiple Switch Detection Interface with Suppressed Wake-Up and 32mA Wetting Current Freescale offers multiple Switch Detection Interface Devices. The 33975 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. The 33975 device has two modes of operation, Normal and Sleep.