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ISO9141 PHYSICAL INTERFACE
EF SUFFIX (PB-FREE)
98ASB42564B
8-PIN SOICN
33660
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
MC33660EF/R2
-40 to 125 °C 8-SOICN
Document Number: MC33660
Rev 3.0, 10/2011
Freescale Semiconductor
Advance Information
* This document contains certain information on a new product. Specifications and information herein are
subject to change without notice. © Freescale Semiconductor, Inc., 2011. All rights reserved.
ISO K Line Serial Link Interface
The 33660 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 33660 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 over-
temperature conditions.
The 33660 derives its robustness to temperature and voltage
e
xtremes by being built on a SMARTMOS process, incorporating
CMOS logic, bipolar/MOS analog circuitry, and DMOS power FETs.
Although the 33660 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 ºC ≤ T
A
≤ 125 ºC and 8.0 V ≤ V
BB
≤ 18 V supply. The economical
SO-8 surface-mount plastic package makes the 33660 very cost
effective.
Features
• Operates over wide supply voltage of 8.0 to 18 V
• Operating temperature of -40 to 125 °C
• Interfaces directly to standar
d CMOS microprocessors
• ISO K line pin protected against shorts to battery
• 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 V
BAT
current drain with V
DD
at 5.0 V
• Low current drain during operation with V
DD
at 5.0 V
VDD
ISO K-LINE
T
XD
R
XD
VDD
V
DD
RX
TX
GND
ISO
CEN
VBB
MCU
33660
Dx
SCIRxD
SCITxD
+V
BAT
Figure 1. 33660 Simplified Application Diagram
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