3
3.1
Pin Connections
Pinout Diagram
NC
NC
IGNOUT1
IGNFB1
ISO9141
INJOUT1
INJGND1
ROUT1
RGND1
NC
INJGND2
KEYSW
Transparent Top View
48 47 46 45 44 43 42 41 40 39 38 37
36
35
34
33
32
31
30
29
28
27
26
25
13 14 15 16 17 18 19 20 21 22 23 24
O2HFB
O2HOUT
IGNSENSP
IGNSENSN
OH2SENSN
OH2SENSP
VRSOUT
VRSP
VRSN
CSB
VPWR
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
RIN1
RIN2
O2HIN
IGNIN1
NC
INJIN1
NC
BATSW
MTX
MRX
TACHOUT
NC
Figure 3. 33813 Pin Connections
3.2
Pin Definitions
Table 2. 33813 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page
Pin
1
2
3
Pin Name
O2HFB
O2HOUT
IGNSENSP
Pin
Function
Input
Output
Input
Formal Name
O2 Sensor Heater
Feedback Input
O2 Sensor Heater
Output
Description
Voltage feedback from drain of O2 Sensor Heater driver FET
Pre-driver output for O2 Sensor Heater driven by SPI input or O2HIN pin
Positive input to the ignition current sense differential amplifier
Ignition Current
Sense Input Positive Used to measure current in IGBT emitter resistor for IGNOUT1 and
IGNOUT2, if used.
Negative input to the ignition current sense differential amplifier
Ignition Current
Sense Input Negative Used to measure current in IGBT emitter resistor for IGNOUT1 and
IGNOUT2, if used.
O2 Heater Current Negative input to the O2 heater current sense differential amplifier
Sense Input Negative Used to measure current in of O2 heater driver MOSFET source resistor, if
used.
4
IGNSENSN
Input
5
O2HSENSN
Input
SI
VPPREF
GND
SO
VCC
VPPSENS
RESETB
VPROT
LAMPOUT
RGND2
ROUT2
NC
33813
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
