33797_11 Datasheet, PDF (3/35 Pages) Freescale Semiconductor, Inc – Four Channel Squib Driver IC

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