首页	公司简介	产品展台	开发生产	资料下载	技术支持	解决方案	展会消息
代理经销	集成电路	高频微波	消费电子	工控网络	安防报警	光纤光电	汽车电子
合作交流	留言本	友情连接	热卖产品	销售网络	招聘加盟	新品介绍	联系我们

Motorola : Semiconductors : Product Catalog : Analog : Safety, Security, and Sensors : Sensors : MC33794

Page Contents

Features
Parametrics
Documentation
Orderable Parts

Other Info

MC33794 : Occupant detect E-Field sensor for MCU support

The MC33794 is intended for applications where non-contact sensing of objects is desired. It contains circuitry necessary to generate a low level electric field and measure the field loading caused by objects moved into the field. The MC33794 is intended for use in detecting objects in an electric field associated with anelectrode. The IC generates a low frequency sine wave. The frequency is adjustable by using an external resistor and is optimized for 125 kHz. The sine wave has very low harmonic content to avoid the generation of harmonic interference. The internal generator produces a nominal 5.0 V peak-to-peak output which is passed through an internal resistor of about 22k ??.The MC33794 contains support circuits for an MCU to allow the construction of a 2 chip E-field system.

MC33794 Features

9 electrode and 2 reference outputs

Shield driver to reduced cable loading

+5.0 V regulator to power external circuit

ISO-9141 physical layer interface

Lamp driver output

Watchdog and power on reset timer

Critical internal nodes scaled and selectable for measurement

High purity sine wave generator tuneable with external resistor

MC33794 Parametrics

Characteristics	Package	System Type	Channel Number	Current Limit	Max Voltage	Communications	Availability
125kHz generator, shield driver, 9 electrodes _ 3Vref outputs, detector, 5V regulator, MCU support	44HSOP, 44 QFN (9x9)	Conventional or distributed	11	75mA	40V	ISO9141	NOW

MC33794 Documentation

Brochure

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
APDPAK/D	Analog ICs Portfolio Package	html	0	0	1/31/2002
BR1567/D	Analog ICs Integrated Solutions Technology	pdf	5416	0	1/16/2002
BR1568/D	Analog ICs Integrated Solutions Packaging	pdf	1411	0	1/11/2002
BR1569/D	Analog ICs Integrated Solutions Applications	pdf	2363	0	1/11/2002

Data Sheets

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
MC33794/D	Electric Field Imaging Device	pdf	258	5	8/29/2002

Fact Sheets

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
MC33794FS/D	Analog Products MC33794 Fact Sheet	pdf	509	0	1/16/2002

Selector Guide

ID	Name	Format	Size K	Rev #	Date Last Modified	Order Availability
SG1002/D	Analog SPS Sales Guide	pdf	869	0	6/27/2002

Orderable Parts Information

PartNumber	Package Info	Life Cycle Description (code)	Remarks	Budgetary Price QTY 1000+ ($US)	Order Availability
MC33794DH	HSOP44	PRODUCT NEWLY INTRO'D/RAMP-UP(1)	-	$3.45
MC33794DHR2	HSOP44 T/R	PRODUCT NEWLY INTRO'D/RAMP-UP(1)	-	$3.47