Analog Products Fact Sheet Networking MC33793 Distributed Systems Interface Components Distributed System Interface (DSI) Sensor Interface DESCRIPTION 33793 SIMPLIFIED APPLICATION DIAGRAM The 33793 is designed to be used with a sensor or actuator at a location that is remote from a centralized MCU. This device provides power, measurement, local logic I/O, and communications between the remote sensor and the centralized MCU over a DSI bus. 33790 GND DSIO Sensors such as accelerometers can be powered from the regulated output of the device and the resulting analog value from the sensor can be converted by the 33793 from an analog level to a digital value for transmission over the DSI bus in response to a query from the MCU. X-Y Accelerometer Error Test X Y Four I/O lines can be configured by the central MCU over the DSI bus as analog inputs, digital inputs,or digital outputs. This allows more than one sensor to be remotely controlled and measured by a single 33793. Additionally, a high-drive logic output is provided that can be used to power other low-power sensors or indicators. GND VCC 33793 BUSIN BUSRTN I/O0 I/O1 I/O2 I/O3 BUSOUT H_Cap REGOUT LOGOUT AGND Multiple DSI Slaves 33793 BusIN The 33793 can replace an MCU and its supporting hardware in remote measurement and control applications, resulting in a significant cost reduction. APPLICATIONS PERFORMANCE TYPICAL VALUES • Simple Bus-controlled Part for Remote Control and Sensing Operating Voltage 7.0 – 30 V • Automotive, Aircraft, Marine and Industrial Control and Safety Systems • Heating and Air-conditioning Data Rate 5.0 k – 150 kB/s Reg. Outputs 6.0 mA @ 5.0 V Regulation ESD Operating Temperature ±5.0% ±2000 V -40°C ≤ TA ≤ 85°C FEATURES QUESTIONS • Conforms to DSI specification version 1 • Are you working with vehicular safety systems? • 4-channel, 8-bit Analog-to-Digital Converter (ADC) • 4 pins configurable as analog or logic inputs or as logic outputs • Provides regulated +5.0 V output for sensor power from bus • Do you need an inexpensive way to remotely power, measure, and control things? • Are you currently using an MCU at remote locations to provide communications, control, and measurement? The DSI bus family of parts can do this with a single low-cost part and eliminate power supplies, software, and many support components at the remote location. • Additional high-drive logic output • Undervoltage fault detection and signaling • On-board clock (no external elements required) • Field-programmable address • Default and field-programmable as a DSI daisy chain device • Recognizes reverse initialization for open bus fault tolerance • Detects short to battery on bus switch and prevents its closure • Lead free package • Devices available for comparison are in the Analog Product Selector Guide - SG1002, and Automotive Product Selector Guide - SG187. PROTECTION LIMITING ACTIVE PULL UP/DOWN z Under-voltage Over-current SHUT DOWN LogOUT Open I/O Pins z CUSTOMER BENEFITS • Reduces cost of remote control and measurements • Eliminates the need for a separate remote power source and wires ORDERING INFORMATION Device MCZ33793EF/R2 MCZ33793AEF/R2 Temperature Range (TA) Package -40°C to 85°C 16 SOICN (Pb-free) Data Sheet Order Number MC33793 Contact Sales for Evaluation Kit Availability 16 SOICN 1.27 mm Pitch 9.9 mm x 3.9 mm Body Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc. 2006-2010. All rights reserved. MC33793FS REV 4.0