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33993

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		开关
页数	文件大小	规格书
28页	765K
描述
Multiple Switch Detection Interface

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33993 数据手册

Document Number: MC33993

Rev. 4.0, 6/2007

Freescale Semiconductor

Advance Information

Multiple Switch Detection

Interface

33993

The 33993 Multiple Switch Detection Interface 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.

MULTIPLE SWITCH

DETECTION INTERFACE

The 33993 device has two modes of operation, Sleep and Normal.

The Sleep mode provides low quiescent current and enables the

wake-up features of the device. Normal mode allows programming of

the device and supplies switch contacts with pull-up or pull-down

current as it monitors switch change of state.

DW SUFFIX

EK SUFFIX (PB-FREE)

98ARH99137A

The 33993 is packaged in the 32-pin wide-body SOIC, reducing

circuit board area. Low quiescent current makes the 33993 ideal for

automotive and industrial products requiring low sleep state currents.

32-PIN SOICW

ORDERING INFORMATION

Features

Temperature

Package

• Designed to Operate 5.5 V ≤ V_PWR≤ 26 V

• Switch Input Voltage Range -14 V to V_PWR, 40 V Max

Device

Range (T )

MC33993DWB/R2

MCZ33993EW/R2

• Interfaces Directly to Microprocessor Using 3.3 V/5.0 V SPI

Protocol

-40°C to 125°C

32 SOICW

• Selectable Wake-Up on Change of State

• Selectable Wetting Current (16 mA or 2.0 mA)

• 8 Programmable Inputs (Switches to Battery or Ground)

• 14 Switch-to-Ground Inputs

• V_PWRStandby Current 100 µA Typical, V_DDStandby Current 20 µA Typical

• Active Interrupt (INT) on Change-of-Switch State

• Pb-Free Packaging Designated by Suffix Code EW

V_DD

Power Supply

LVI

VBAT

33993

MCU

Enable

SP0

SP1

VPWR

Watchdog

Reset

V_DD

VBAT

VDD

SP7

WAKE

MOSI

SCLK

SG0

SG1

MISO

INT

AMUX

AN0

SG12

SG13

GND

Figure 1. MC33993 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...28

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