PIN CONNECTIONS
PIN CONNECTIONS
SQB_LO_1A
SENSE_1A
MOSI
CLK
SQB_HI_1A
VFIRE_1A
VDIAG_1
GND
MISO
VDD
VFIRE_1B
SQB_HI_1B
FEN_1
R_LIMIT_1
SENSE_1B
SQB_LO_1B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
SQB_LO_2A
SENSE_2A
CS
RST
SQB_HI_2A
VFIRE_2A
VDIAG_2
VFIRE_RTN
VFIRE_RTN
R_DIAG
VFIRE_2B
SQB_HI_2B
FEN_2
R_LIMIT_2
SENSE_2B
SQB_LO_2B
Figure 3. Pin Function Description
Table 1. Pin Function Description
Pin
1
2
Pin Name
SQB_LO_1A
SENSE_1A
Pin Function
Output
Input
Formal Name
Squib Lo 1A
Squib Sense 1A
Pin Description
Drain of the low side switch that connects to the low pin of
Squib_1A
Used during standard applications involving a four channel squib
driver IC or during cross-coupling applications involving two four
channel squib driver ICs (squib driver IC #1 and squib driver IC
#2).
Serial data input for SPI interface.
Serial clock input for SPI interface.
Drain of the high side switch that connects to the low pin of
Squib_1A
Firing supply pin for Squib_1A.
Diagnostic pin for high side safing sensor for squibs 1A and 1B
and the VFIRE supply voltage.
Device ground pin for internal logic and diagnostic circuitry.
Serial data output for SPI interface.
Device power pin for internal logic and diagnostic circuitry.
Firing supply pin for Squib_1B.
Drain of the high side switch that connects to the low pin of
Squib_1B
3
4
5
6
7
8
9
10
11
12
13
14
15
MOSI
CLK
SQB_HI_1A
VFIRE_1A
VDIAG_1
GND
MISO
VDD
VFIRE_1B
SQB_HI_1B
FEN_1
R_LIMIT_1
SENSE_1B
Input
Input
Output
Supply
Input
Ground
Output
Input
Supply
Output
Input
Output
Input
Data Input 1
Serial Clock
Squib Hi 1A
Squib Firing Supply
1A
Squib Diagnostic 1A
and 1A
Device Ground
Data Output 0
Logic Power
Squib Firing Supply
1B
Squib Hi 1B
FET Driver 1A and 1B Active high input signal to enable operation of the squib_1A and
Squib_1BFET drivers.
Limit Resistor - 1A
and 1B
Squib Sense 1B
External resistor to ground is used to set current limit for
Squib_1A and squib_1B FET drivers.
Used during standard applications involving a four channel squib
driver IC and during cross-coupling applications involving two
four channel squib driver ICs (squib driver IC #1 and squib driver
IC #2).
33797
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
