NXP Semiconductors CD1020
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.| Part No. | CD1020 |
|---|---|
| Datasheet | CD1020 Download |
| Manufacturer |  NXP Semiconductors |
| Description | 22-channel multiple switch detection interface |
| Buy | Stock & Price |
FEATURES AND BENEFITS
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, 8, 12, 16 mA) – Programmable wetting operation (pulse or continuous) – Selectable wake-up on change of state
● 22-to-1 Analog Multiplexer – Buffered AMUX output from SG/SP channels
● Active interrupt (INT_B) on change-of-switch state
● Direct MCU Interface through 3.3 V / 5.0 V SPI protocol CD1020 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 — 20 August 2024 © 2024 NXP B.V. All rights reserved. Document feedback 2 / 61 NXP Semiconductors CD1020 22-channel multiple switch detection interface 3 Ordering information This section describes the part numbers available to be purchased along with their differences.
