Document Number: MC33290
Rev 8.0, 8/2008
Freescale Semiconductor
Technical Data
ISO K Line Serial Link Interface
33290
The 33290 is a serial link bus interface device designed to provide
bi-directional 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.
ISO9141 PHYSICAL 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
-40ºC ≤ TA ≤ 125ºC and 8.0 V ≤ VBB ≤ 18 V supply. The economical
SO-8 surface-mount plastic package makes the 33290 very cost
effective.
D SUFFIX
EF SUFFIX (PB-FREE)
98ASB42564B
8-PIN SOICN
ORDERING INFORMATION
Temperature
Features
Device
Package
• Operates Over Wide Supply Voltage of 8.0 to 18V
• 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
Range (T )
A
MC33290D/R2
-40 to 125°C
8-SOICN
MCZ33290EF/R2
• 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
• Low Current Drain During Operation with VDD at 5.0 V
• Pb-Free Packaging Designated by Suffix Code EF
+V
BAT
V
DD
33290
VBB
VDD
VDD
MCU
ISO K-Line
D
ISO
CEN
RX
x
SCIR D
x
T D
x
SCIT D
x
TX
R D
x
GND
Figure 1. 33290 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as
may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2006-2008. All rights reserved.