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L9177ATR Datasheet(PDF) 4 Page - STMicroelectronics

Part # L9177ATR
Description  Automotive engine management control IC for small engines
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9177ATR Datasheet(HTML) 4 Page - STMicroelectronics

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1.2
Pin description
Figure 2. Pin connection (top view)
1
2
3
5
6
4
7
8
9
10
27
11
28 29 30 31 32
59 58 57 56
54
55
53 52 51 50 49
43
42
41
39
38
40
48
47
46
44
45
22 23 24 25 26
60
61
62
63
64
17 18 19 20 21
37
36
34
33
35
12
13
14
15
16
GAPG0403151617PS
DIR
NC
VDD_TRK
REXT
HS_OUT
VRIN+
VRIN-
VROUT
O2H
TACH
ILS_TAC
GND_O2H
NC
INO2H
RESET
IN-REL2
PWM
NC
VDD
KL_UNE
KL_RX
KL_TX
INJ2
IN2
GND_NJ2
GND_NJ1
IN1
INJ1
KEY
CS
SCK
SI
Table 1. Pin function
Pin #
Pin name
Description
I/O type
Class
1
DIR
Logic input to set stepper motor direction
I
SIGNAL
2
NC
Not connected
-
-
3
VDD_TRK
Tracking voltage regulator output
O
PWR
4
REXT
External resistor for precision current reference
I
SIGNAL
5
HS_OUT
High side switch output
O
PWR
6
VRIN+
VRS positive differential input
I
SIGNAL
7
VRIN-
VRS negative differential input
I
SIGNAL
8
VROUT
VRS output
O
SIGNAL
9
O2H
O2 sensor heater output
O
PWR
10
TACH
Tachometer driver output
O
PWR
11
ILS_TACH
Tachometer driver input
I
SIGNAL
12
GND_O2H
O2 sensor heater ground
GND
PWR
13
NC
Not connected
-
-
14
INO2H
O2 sensor heater input
I
SIGNAL
L9177A
Pin description
DS12175 - Rev 5
page 4/55



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