Document Number: MC33290

Rev 8.0, 8/2008

Freescale Semiconductor

Technical Data

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.

ISO K Line Serial Link Interface

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.

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

SO-8 surface-mount plastic package makes the 33290 very cost

effective.

Features

• 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

• 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

• Pb-Free Packaging Designated by Suffix Code EF

Figure 1. 33290 Simplified Application Diagram

ISO9141 PHYSICAL INTERFACE

D SUFFIX

EF SUFFIX (PB-FREE)

98ASB42564B

8-PIN SOICN

33290

ORDERING INFORMATION

Device

Temperature

Package

MC33290D/R2

-40 to 125°C

8-SOICN

MCZ33290EF/R2

VDD

Dx

SCIRxD

SCITxD

VDD

33290

+VBAT

ISO K-Line

RxD

TxD

MCU

RX

TX

CEN

VDD VBB

GND

ISO