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MCZ33972 - Multiple Switch Detection Interface

Download the MCZ33972 datasheet PDF. This datasheet also covers the MCZ33972A 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 pin can be found in the Functional Pin Description section beginning on page 10.

8 25 28 9 15, 18 24 16 17 29 30 31 32 Pin Name GND SI SCLK CS SP0 3 SP4 7 SG0 6, SG13 7 VPWR WAKE INT AMUX VDD S

Key Features

  • a 22-to-1 analog multiplexer for reading inputs as analog. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read. The 33972 device has two modes of operation, Normal and Sleep. Normal mode allows programming of the device and supplies switch contacts with pullup or pulldown current as it monitors switch change of state. The Sleep mode provides low quiescent current, which makes the 33972 ideal for automotive and industrial products requiring low sleep state.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (MCZ33972A_FreescaleSemiconductor.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Freescale Semiconductor (now NXP Semiconductors)

Part Number Description
MCZ33972A Multiple Switch Detection Interface
MCZ33970 Dual Gauge Driver
MCZ33976 Dual Gauge Driver
MCZ33977 Single Gauge Driver
MCZ33989 System Basis Chip

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
Freescale Semiconductor Advance Information Document Number: MC33972 Rev. 9.0, 4/2007 Multiple Switch Detection Interface with Suppressed Wake-Up 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. The analog input signal is buffered and provided on the AMUX output pin for the MCU to read. The 33972 device has two modes of operation, Normal and Sleep.