Datasheet > MC33CD1020AES

MC33CD1020AES

更新时间： 2024-09-11 15:19:31

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
56页	1449K
描述
Low-Cost 22-CH Multiple Switch Detect Interface

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数据手册

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MC33CD1020AES 数据手册

Document Number: CD1020

Rev. 4, 7/2019

NXP Semiconductors

Technical Data

22 channel multiple switch detection

interface

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. The analog selected input signal is buffered and provided on the AMUX

output pin for the MCU to read.

MULTIPLE SWITCH DETECTION INTERFACE

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.

ES SUFFIX (PB-FREE)

98ASA00656D

32-PIN QFN (WF-TYPE)

Applications

• Automotive

The low cost MSDI is available in high power, space saving wettable flank

5x5 mm QFN package.

• Heating ventilation and air conditioning (HVAC)

• Lighting

• Central gateway/in-vehicle networking

• Gasoline engine management

Features

• Fully functional operation 6.0 V ≤ V_BATP≤ 36 V

• Full parametric operation 6.0 V ≤ V_BATP≤ 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 I_BATP= 30 μA and I_DDQ= 10 μA

• Active interrupt (INT_B) on change-of-switch state

V_DDQ

Battery

Power

Supply

CD1020

SG1

Battery

VBATP

SP0

Power

Supply

WAKE_B

MCU

SP1

SP7

VDDQ

INT_B

CS_B

INTB

CSB

MISO

MOSI

SCLK

MOSI

SCLK

SG0

AN0

AMUX

SG12

SG13

GND

Figure 1. CD1020 simplified application diagram

12 3 4 5 6 7...56

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