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Document Number: MC33660
Rev 6.0, 1/2016
NXP Semiconductors
Technical Data
© NXP Semiconductors, N.V, 2016. 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 extremes 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 a wide supply voltage of 8.0 V to 18 V
• Operating temperature of -40 °C to 125 °C
• Interfaces directly to standard 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
Figure 1. 33660 Simplified Application Diagram
ISO9141 PHYSICAL INTERFACE
EF SUFFIX (PB-FREE)
98ASB42564B
8-PIN SOICN
33660
Applications
• Farm Equipment
• Automotive Systems
• Industrial Equipment
• Robotic Equipment
• Applications where Module-to-Module
Communications are required
• Marine and Aircraft Networks
VDD
ISO K-LINE
T
XD
R
XD
VDD
V
DD
RX
TX
GND
ISO
CEN
VBB
MCU
33660
Dx
SCIRxD
SCITxD
+V
BAT
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