Document
Freescale Semiconductor Technical Data
Document order number:
MC33897 Rev 11.0, 12/2005
Single Wire CAN Transceiver
The 33897 Series provides a physical layer for digital communications purposes 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 (CAN). 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 either low or high (33.33 kbps or 83.33 kbps) data rates. A highvoltage wake-up feature allows the device to control the regulator used in support of the MCU and other logic. The device includes a control terminal 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 Undervoltage Lockout Prevents False Data with Low Battery Pb-Free Packaging Designated by Suffix Code EF
33897/A/B/C/D
SINGLE WIRE CAN TRANSCEIVER
D SUFFIX EF (Pb-FREE) SUFFIX 98ASB42565B 14-TERMINAL SOICN
EF (Pb-FREE) SUFFIX 98ASB42564B 8-TERMINAL SOICN
ORDERING INFORMATION
Device MC33897D/R2 MC33897EF/R2 MC33897AD/R2 MC33897AEF/R2 *MC/PC33897CEF/R2 MC33897BEF/R2 *MC/PC33897DEF/R2
* Recommended device for all new designs
Temperature Range (TA)
Package
14 SOICN - 40°C to 125°C
8 SOICN
Power Source VCC Voltage Regulator EN
Battery
VBATT VCC CNTL TXD RXD MCU MODE0 MODE1 GND 4 BUS LOAD SWC BUS
33897/A/C
Figure 1. 33897/A/C Simplified Application Diagram
* This document contains certain information on a new product. Specifications and information herein are subject to change without notice.
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DEVICE VARIATIONS
VCC
Battery
VCC TXD RXD MCU
VBATT
BUS LOAD
SWC BUS
MODE0 MODE1
GND
33897B/D
Figure 2. 33897B/D Simplified Application Diagram
DEVICE VARIATIONS
Table 1. Device Variations
Part No. 33897 33897A Load Voltage Sleep Mode 1.0 V Max 0.1 V Max • • • • 33897B 0.1 V Max • • • • *33897C 0.1 V Max • • • *33897D 0.1 V Max • • • • Other Significant Differences 14-Terminal Package 14-Terminal Package Removes diode drop during Sleep Mode May not detect Loss of Ground under certain module characteristics. 8-Terminal Package Removes diode drop during Sleep Mode Does not include the CNTL terminal May not detect Loss of Ground under certain module characteristics. 14-Terminal Package Removes diode drop during Sleep Mode Effectively detects Loss of Ground 8-Terminal Package Removes diode drop during Sleep Mode Effectively detects Loss of Ground Does not include the CNTL terminal 2, 3, 4, 6, 7 10,12, 14 7 2, 3, 4, 6, 7 10,12, 14 See Page 7 7
*Recommended device for all new designs
33897/A/B/C/D
2
Analog Integrated Circuit Device Data Freescale Semiconductor
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
TXD BUS DRVR TX Bus DRVR
MODE0 MODE1
HV WU E n HVWU Enable
Mode Mode Co ntrol Control
Wa ve Sha ping E n Waveshaping Enable TX Dat Data a TXD Disab le Disable
BUS
Bus BUSRCVR RCVR
HV WU De t HVWU Detect RX Dat a Disab le RXD Data Disable
TXD RXD
Undervoltage Detect Timer OSC Load Switch
VBATT BAT
Timers
LOAD
GND CNTL CNTL*
*CNTL terminal is present on 33897/A/C only.
Figure 3. 33897/A/B/C/D Simplified Internal Block Diagram
33897/A/B/C/D
Analog Integrated Circuit Device Data Freescale Semiconductor
3
TERMINAL CONNECTIONS
TERMINAL CONNECTIONS
33897/A/C
GND TXD MODE0 MODE1 RXD NC GND
1 2 3 4 5 6 7 14 13 12 11 10 9 8
GND NC BUS LOAD VBATT CNTL GND TXD MODE0 MODE1 RXD
1 1 2 2 3 3 4 4
33897B/D
88 77 66 55
GND BUS LOAD VBATT
Figure 4. 33897/A/B/C/D Terminal Connections
Table 2. Terminal Definitions A functional description of each terminal can be found in the Functional Terminal Description section, begining on page 12.
33897/A/C Terminal 1, 7, 8, 14 2 3, 4 5 6, 13 33897B/D Terminal 8 1 2, 3 4 – Terminal Name GND TXD MODE0, MODE1 RXD NC Formal Name Ground Transmit Data Mode Control Receive Data No Connect Definition Electrical Common Ground and Heat removal. A good thermal path will also reduce the die temperature. Data input here will appear on the BUS terminal. A logic [0] will assert the bus, a logic [1] will make the bus go to the recessive state. These terminals control Sleep Mode, Transmit Level, and Speed. They have weak pulldowns. Open drain output of the data on BUS. A recessive bus = a logic [1], a dominant bus = logic [0]. An external pullup i.