MCZ33290EFR2 Freescale Semiconductor, MCZ33290EFR2 Datasheet - Page 9

• Manufacturer Part Number: MCZ33290EFR2
• Description: IC SER LNK INTER ISO KLINE 8SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33290EFR2

• Applications: Automotive
• Interface: Serial
• Voltage - Supply: 8 V ~ 18 V
• Package / Case: *
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MCZ33290EFR2TR

to the ISO 9141 physical bus specification. The device was
designed for automotive environment usage compliant with
On-Board Diagnostic (OBD) requirements set forth by the
California Air Resources Board (CARB) using the ISO K line.
The device does not incorporate an ISO L line. It provides bi-
directional half-duplex communications interfacing from a
to battery level logic signals and visa versa. The maximum
data rate is set by the fall time and the rise time. The fall time
is set by the output driver. The rise time is set by the bus
capacitance and the pull-up resistors on the bus. The fall time
of the 33290 allows data rates up to 150 kbps using a 30
percent maximum bit time transition value. The serial link
interface will remain fully functional over a battery voltage
range of 6.0 to 18 V. The device is parametrically specified
over a dynamic V
metric with the V
microcontroller. This enhances the 33290’s ability to remain
in harmony with the R
microcontroller. The R
with standard 5.0 V CMOS circuitry. For fault-tolerant
purposes the T
Analog Integrated Circuit Device Data
Freescale Semiconductor
The 33290 is a serial link bus interface device conforming
The 33290 transforms 5.0 V microcontroller logic signals
Required input levels from the microcontroller are ratio-
X
input from the microcontroller has an internal
DD
BB
voltage normally used to power the
voltage range of 8.0 to 18 V.
X
X
and T
and T
X
X
control input signals of the
control inputs are compatible
TYPICAL APPLICATIONS
FUNCTIONAL DESCRIPTION
INTRODUCTION
microcontroller to the communication bus. The 33290
incorporates circuitry to interface the digital translations from
5.0 V microcontroller logic levels to battery level logic and
from battery level logic to 5.0 V logic levels. The 33290 is built
using Freescale Semiconductor’s SMARTMOS process and
is packaged in an 8-pin plastic SOIC.
passive pull-up to V
passive pull-down to ground.
active data pull-down. The internal active pull-down is
current-limit-protected against shorts to battery and further
protected by thermal shutdown. Typical applications have
reverse battery protection by the incorporation of an external
510 Ω pull-up resistor and diode to battery.
using a reverse battery blocking diode (“D” in the Simplified
Application Diagram on page 1). Battery line transient
protection of the device is provided for by using a 45 V zener
and a 500 Ω resistor connected to the V
in the same diagram. Device ESD protection from the
communication lines exiting the module is through the use of
the capacitor connected to the V
capacitor used in conjunction with the 27 V zener connected
to the ISO pin.
A pull-up to battery is internally provided as well as an
Reverse battery protection of the device is provided by
DD
, while the CEN input has an internal
BB
device pin and the
TYPICAL APPLICATIONS
BB
source as shown
INTRODUCTION
33290
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