MOTOROLA
Document order number: MC33290/D
Rev 5, 1/2003
SEMICONDUCTOR TECHNICAL DATA
33290
ISO K Line Serial Link Interface
The 33290 is a serial link bus interface device designed to provide bidirectional half-duplex communication interfacing in automotive diagnostic
applications. It is designed to interface between the vehicle’s on-board
microcontroller and systems off-board the vehicle via the special ISO K line.
The 33290 is designed to meet the Diagnostic Systems ISO9141 specification.
The device’s K line bus driver’s output is fully protected against bus shorts and
overtemperature conditions.
ISO K LINE SERIAL LINK
INTERFACE
The 33290 derives its robustness to temperature and voltage extremes by
being built on a SMARTMOS process, incorporating CMOS logic, bipolar/MOS
analog circuitry, and DMOS power FETs. Although the 33290 was principally
designed for automotive applications, it is suited for other serial
communication applications. It is parametrically specified over an ambient
temperature range of -40°C ≤ TA ≤ 125°C and 8.0 V ≤ VBB ≤ 18 V supply. The
economical SO-8 surface-mount plastic package makes the 33290 very cost
effective.
Features
• Designed to Operate Over Wide Supply Voltage of 8.0 to 18 V
• Ambient Operating Temperature of -40 to 125°C
• Interfaces Directly to Standard CMOS Microprocessors
• ISO K Line Pin Protected Against Shorts to Ground
• Thermal Shutdown with Hysteresis
• ISO K Line Pin Capable of High Currents
• ISO K Line Can Be Driven with up to 10 nF of Parasitic Capacitance
• 8.0 kV ESD Protection Attainable with Few Additional Components
• Standby Mode: No VBat Current Drain with VDD at 5.0 V
D SUFFIX
PLASTIC PACKAGE
CASE 751
(8-SOICN)
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33290D/DR2
-40 to 125°C
8-SOICN
• Low Current Drain During Operation with VDD at 5.0 V
33290 Simplified Application Diagram
+VBat
On-Board Diagnostic Link
Service Scan Tool
or
End of Production Line
Programming
or
System Checking
45 V(2)
D(1)
+VDD
MCU
VCC
5.0 V
7
VBB
VDD
1.0 nF
Dx
SCIRxD
SCITxD
8
6
5
500 Ω(2)
33290
CEN ISO
Rx
Tx
GND
510 Ω
1
10 nF(3)
5.0 nF(3)
ISO
K Line
TxD
RxD
4
27 V(3)
3
Components necessary for Reverse Battery (1), Overvoltage Transient (2), and 8.0 kV
ESD Protection (3) in a metal module case. This device contains 85 active transistors.
© Motorola, Inc. 2003