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Freescale Semiconductor, Inc. reserves the right to change the detail specifications,

as may be required, to permit improvements in the design of its products.

Document Number: MC33897

Rev. 18.0, 4/2012

Freescale Semiconductor

Technical Data

Single Wire CAN Transceiver

The 33897 series provides a physical layer for digital

communication using a Carrier Sense Multiple Access/Collision

Resolution (CSMA/CR) data link operating over a single wire medium.

This is more commonly referred to as single-wire Controller Area

Network (SWCAN).

The 33897 series operates directly from a vehicle's 12 V battery

system or a broad range of DC-power sources. It can operate at low or

high (33.33

kbps or 83.33 kbps) data rates. A high-voltage wake-up

feature allows the device to control the regulator used in support of the

MCU and other logic. The device includes a control pin that can be

used to put the module regulator into Sleep mode. The presence of a

defined wake-up voltage level on the bus will reactivate the control line

to turn the regulator and the system back ON.

The device complies with the GMW3089v2.4 General Motors

Corporation specification.

Features

• Waveshaping for low Electromagnetic Interference (EMI)

• Detects and automatically handles loss of ground

• Worst-case Sleep mode current of only 60 μA

• Current limit prevents damage due to bus shorts

• Built-in thermal shutdown on bus output

• Protected against vehicular electrical transients

• Under-voltage lockout prevents false data with low battery

Figure 1. 33897 Simplified Application Diagram

SINGLE-WIRE CAN

TRANSCEIVER

33897

EF (PB-FREE) SUFFIX

98ASB42565B

14-PIN SOICN

ORDERING INFORMATION

Device

Temperature

Range (T

)

Package

MCZ33897TEF/R2

-40 to 125 °C 14 SOICN

*MC33897CTEF/R2

*Recommended device for all new designs

VBATT

MODE 1

MODE 0

RXD

TXD

GND

LOAD

CNTL

BUS

MCU

Battery

Voltage

Power

source

Regulator

SWC Bus

33897

Summary of content (19 pages)

PAGE 1
Freescale Semiconductor Technical Data Document Number: MC33897 Rev. 18.0, 4/2012 Single Wire CAN Transceiver 33897 The 33897 series provides a physical layer for digital communication using a Carrier Sense Multiple Access/Collision Resolution (CSMA/CR) data link operating over a single wire medium. This is more commonly referred to as single-wire Controller Area Network (SWCAN). The 33897 series operates directly from a vehicle's 12 V battery system or a broad range of DC-power sources.
PAGE 2
DEVICE VARIATIONS DEVICE VARIATIONS Table 1. Device Variations Part No. Load Voltage Sleep Mode See Page 33897T 1.0 V Max 7 *33897CT 0.
PAGE 3
INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM TXD BUSDRVR DRVR TX Bus MODE0 MODE1 HV WU E n HVWU Enable Wa ve Sha ping E nEnable Waveshaping Mode Mode Co ntrol Control TX Dat Data a TXD BUS Disab le Disable Bus BUSRCVR RCVR HVWU HV WU De Detect t RX Dat a Disab le RXD Data Disable TXD RXD Timers Undervoltage Detect VBATT BAT Load Switch LOAD Timer OSC GND CNTL Figure 2.
PAGE 4
PIN CONNECTIONS PIN CONNECTIONS 33897 GND 1 14 GND TXD 2 13 NC MODE0 3 12 BUS MODE1 4 11 LOAD RXD 5 10 VBATT NC 6 9 CNTL GND 7 8 GND Figure 3. 33897 Pin Connections Table 2. Pin Definitions A functional description of each pin can be found in the Functional Pin Description section, beginning on page 12. 33897 Pin Pin Name Formal Name Definition 1, 7, 8, 14 GND Ground Electrical Common Ground and Heat removal. A good thermal path will also reduce the die temperature.
PAGE 5
ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 3. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Rating Symbol Value Unit VBATT - 0.3 to 40 V VIN - 0.3 to 7.0 V RXD Pin Voltage VRXD - 0.3 to 7.0 V CNTL Pin Voltage VCNTL - 0.
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ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics Characteristics noted under conditions of -40 °C ≤ TA ≤ 125 °C, unless otherwise stated. Voltages are relative to GND, unless otherwise noted. All positive currents are into the pin. All negative currents are out of the pin. Characteristic Symbol Min Typ Max Unit IQSLP – 45 60 μA IQATDIS – – 4.0 mA IQATEN – – 9.0 Under-voltage Shutdown VBATTUV 4.
PAGE 7
ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions of -40 °C ≤ TA ≤ 125 °C, unless otherwise stated. Voltages are relative to GND, unless otherwise noted. All positive currents are into the pin. All negative currents are out of the pin.
PAGE 8
ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 4. Static Electrical Characteristics (continued) Characteristics noted under conditions of -40 °C ≤ TA ≤ 125 °C, unless otherwise stated. Voltages are relative to GND, unless otherwise noted. All positive currents are into the pin. All negative currents are out of the pin. Characteristic Symbol Min Typ Max - 0.2 – 0.2 -350 – - 100 Unit BUS (CONTINUED) BUS Low Voltage VOL 5.0 V ≤ VBATT ≤ 26.
PAGE 9
ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions of -40 °C ≤ TA ≤ 125 °C, unless otherwise stated. Voltages are relative to GND unless otherwise noted. All positive currents are into the pin. All negative currents are out of the pin. Characteristic Symbol Min Typ Max 2.0 – 6.3 Unit BUS Normal Speed Rising Output Delay μs t DLYNORMRO 200 Ω ≤ RL ≤ 3332 Ω, 1.
PAGE 10
ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 5. Dynamic Electrical Characteristics (continued) Characteristics noted under conditions of -40 °C ≤ TA ≤ 125 °C, unless otherwise stated. Voltages are relative to GND unless otherwise noted. All positive currents are into the pin. All negative currents are out of the pin. Characteristic Symbol Min Typ Max Unit BUS (CONTINUED) High Voltage Rising Output Delay μs t DLYHVRO 200 Ω ≤ RL ≤ 3332 Ω, 1.0 μs ≤ Load Time Constants ≤ 4.
PAGE 11
ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS TIMING DIAGRAMS tDLYNORMFO tDLYNORMRO V IH V IL TXD V NOHF Bus V BIA V BUSMOD * V BIA V BUSMOD * V IH RXD V IL tRDLY tRDLY * VBUSMOD is the voltage at the BUSMOD node in Figure 7. Figure 4. TXD, Bus and RXD Waveforms in Normal Mode TDLYHSRO tDLYHSFO VIH TXD VIL VNOHF VBUS * Bus VBIA VBIA VBUS * VIH RXD VIL tRDLY tRDLY * VBUS is the voltage at the BUS pin in Figure 8. Figure 5.
PAGE 12
FUNCTIONAL DESCRIPTION INTRODUCTION FUNCTIONAL DESCRIPTION INTRODUCTION The 33897 Series is intended for use as a physical layer device in a Single Wire CAN communications bus. Communications takes place from a single pin over a single wire using a common ground for a current return path. Two data rates are available, with the high rate used for factory or assembly line communications and the lower for actual system communications where the radiated EMI of the higher rate could be an issue.
PAGE 13
FUNCTIONAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM COMPONENTS VBATT INPUT BUS I /O This power input is not reverse battery protected and should use an external diode to protect it from damage due to reverse battery if this protection is desired. The voltage drop of the diode must be taken into consideration when the operating range of the system is being determined. This diode is generally used to protect the entire module from reverse battery and should be selected accordingly.
PAGE 14
FUNCTIONAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM COMPONENTS 33897 BUS 6.49 kΩ 130 Ω CNOM = (n) 220 pF R= 6.49 kΩ (n -1) LOAD GND Note: The letter ’n’ represents the number of nodes in the system. Figure 7.
PAGE 15
TYPICAL APPLICATIONS TYPICAL APPLICATIONS bus. This wake-up voltage will activate the CNTL line, which enables the regulator and turns the module back ON. This feature allows the module to be more energy efficient since the current consumption is significantly lowered when it goes into sleep mode. The 33897 can be used in applications where the module includes a regulator that has the capability of going into Sleep mode by having an Enable pin. See Figure 8.
PAGE 16
PACKAGING PACKAGE DIMENSIONS PACKAGING PACKAGE DIMENSIONS Important: For the most current Package revision, visit www.freescale.com and perform a Keyword Search on the 98ASB42565B drawing number below. Dimensions shown are provided for reference ONLY.
PAGE 17
PACKAGING PACKAGE DIMENSIONS EF (Pb-FREE) SUFFIX 14-pin SOICN 98ASB42565B ISSUE J 33897 Analog Integrated Circuit Device Data Freescale Semiconductor 17
PAGE 18
REVISION HISTORY REVISION HISTORY REVISION DATE DESCRIPTION OF CHANGES 9.0 5/2005 • • • • Converted to Freescale format Added A & B Versions Updated Device Variation Table, and Note “* Recommended device for all new designs” Added EF (Pb-Free) Devices, and higher soldering temperature 10.0 8/2005 • • • Implemented Revision History page Updated Simplified Application Diagrams Updated Typical Application Schematic 11.0 12/2005 • Added 33897C and D versions and Timing Diagrams 12.
PAGE 19
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