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CD1020 Datasheet(PDF) 1 Page - NXP Semiconductors |
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CD1020 Datasheet(HTML) 1 Page - NXP Semiconductors |
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1 / 56 page  Document Number: CD1020 Rev. 4, 7/2019 NXP Semiconductors Technical Data © NXP B.V. 2019. 22 channel multiple switch detection interface 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 two modes of operation, normal and low-power mode (LPM). Normal mode allows programming of the device and supplies switch contacts with pull-up or pull-down current as it monitors the change of state on the switches. The LPM provides low quiescent current, which makes the CD1020 ideal for automotive and industrial products requiring low sleep-state currents. The low cost MSDI is available in high power, space saving wettable flank 5x5 mm QFN package. Features • Fully functional operation 6.0 V ≤ VBATP ≤ 36 V • Full parametric operation 6.0 V ≤ VBATP ≤ 28 V • Operating switch input voltage range from –1.0 V to 36 V • Eight programmable inputs (switches to battery or ground) • 14 switch-to-ground inputs • Selectable wetting current (2, 8, 12, 16 mA) • Interfaces directly to an MCU using 3.3 V / 5.0 V SPI protocol • Selectable wake-up on change of state • Typical standby current IBATP = 30 μA and IDDQ = 10 μA • Active interrupt (INT_B) on change-of-switch state Figure 1. CD1020 simplified application diagram MULTIPLE SWITCH DETECTION INTERFACE CD1020 Applications • Automotive • Heating ventilation and air conditioning (HVAC) • Lighting • Central gateway/in-vehicle networking • Gasoline engine management ES SUFFIX (PB-FREE) 98ASA00656D 32-PIN QFN (WF-TYPE) SP0 SG12 SG13 SG0 SP7 SP1 Battery VBATP VDDQ MISO MOSI SCLK AMUX EP GND WAKE_B Battery Power Supply Power Supply VDDQ MCU MISO MOSI SCLK AN0 INT_B CS_B CSB INTB SG1 CD1020 |
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Similar Description - CD1020 |
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