MC33794EKR2 Freescale Semiconductor, MC33794EKR2 Datasheet - Page 5

• Manufacturer Part Number: MC33794EKR2
• Description: IC SENSOR ELECTRIC FIELD 54SOICW
• Manufacturer: Freescale Semiconductor
• Type: Sensor Interfacer

Specifications of MC33794EKR2

• Input Type: Logic
• Output Type: Logic
• Interface: ISO9141
• Current - Supply: 7mA
• Mounting Type: Surface Mount
• Package / Case: 54-SOIC (7.5mm Width) Exposed Pad, 54-eSOIC, 54-HSOIC
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MC33794EKR2; MC33794EKR2TR

Table 1. SOICW-EP TERMINAL FUNCTION DESCRIPTION (continued)
Sensors
Freescale Semiconductor
Terminal
36–44
45, 46
32
35
47
51
53
54
LAMP_CTRL
(E10, E11)
ISO_OUT
ISO-9141
Terminal
REF_A,
ISO_IN
E1–E9
REF_B
Name
TEST
GND
(Or as additional electrodes)
Reference Connections
Electrode Connections
Test Mode Control
ISO-9141 Output
ISO-9141 Input
Formal Name
ISO-9141 Bus
Lamp Control
Ground
This terminal and metal backing is the IC power return and thermal radiator/
This terminal is normally connected to circuit ground. There are special
operating modes associated with this terminal when it is not at ground.
These are the electrode terminals. They are connected either directly or through
coaxial cables to the electrodes for measurements. When not selected, these
outputs are grounded through the internal resistance.
These terminals can be individually selected to measure a known capacitance
value. Unlike E1-E9, these two inputs are not grounded when not selected.
This terminal translates ISO-9141 receive levels to 5.0 V logic levels for the
MCU.
This terminal accepts data from the MCU to be sent over the ISO-9141
communications interface. It translates the 5.0 V logic levels from the MCU to
transmit levels on the ISO-9141 bus.
This terminal connects to the ISO-9141 bus. It provides the drive and detects
signaling on the bus and translates it from the bus level to logic levels for the
MCU.
This signal is used to control the lamp driver. A high logic level turns on the lamp.
conductor.
Definition
MC33794
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