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CD1020 - 22-channel multiple switch detection interface

General Description

The CD1020 is a cost-optimized switch detection interface device (MSDI) 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).

Key Features

  • Features and benefits.
  • Fully functional operation from 6.0 V to 36 V.
  • Full parametric operation from 6.0 V to 28 V.
  • Low-power mode current IBATP = 30 μA and IDDQ = 10 μA.
  • 22 Switch detection channels.
  • 14 Switch-to-Ground (SG) inputs.
  • Eight Programmable switch (SP) inputs.
  • Switch-to-Ground (SG) or Switch-to-Battery (SB).
  • Operating switch input voltage range from.
  • 1.0 V to 36 V.
  • Selectable wetting current (2,.

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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.

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CD1020 22-channel multiple switch detection interface Rev. 5 — 20 August 2024 Product data sheet 1 General description The CD1020 is a cost-optimized switch detection interface device (MSDI) 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). This SMARTMOS device also features a 22-to-1 analog multiplexer for reading the input channels as analog inputs. The analog selected input signal is buffered and provided on the AMUX output pin for the MCU to read. The CD1020 device has three modes of operation, normal mode, low-power mode (LPM), and polling mode.