MC33794EKR2 Freescale Semiconductor, MC33794EKR2 Datasheet - Page 2

• 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

2
MC33794
* REF_A and REF_B are
not switched to ground
when not selected.
GND and HEAT SINK
REF_A*, REF_B*
LAMP_CTRL
LAMP_GND
PWR_MON
V
ISO_OUT
DD
A,B,C,D
ISO_IN
WD_IN
E1–E9
AGND
_
TEST
V
MON
RST
PWR
V
V
DD
CC
2.8 k
2.8 k
Figure 1. Simplified Functional Block Diagram
Ω
Ω
INTERNAL BLOCK DIAGRAM
(Note: All Resistor Values are Nominal)
4
REG
REG
POR/
V
V
WD
CC
DD
MUX
OUT
MUX
IN
CONTROL
LOGIC
22 k
Ω
(Nominal)
ATTN
LAMP CKT
ISO-9141
OSC
GAIN AND
OFFSET
RECT
LPF
150
300
Ω
Ω
Freescale Semiconductor
CLK
R_OSC
SHIELD_EN
SHIELD
LEVEL
SIGNAL
LAMP_MON
LAMP_OUT
LP_CAP
LAMP_SENSE
ISO-9141
39 k
10 nF
Ω
Sensors