33797 Datasheet, PDF (3/34 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 4. Pin Function Description
Table 1. Pin Function Description
Pin
Pin Name
Pin Function
1
SQB_LO_1A ^Output
2
SENSE_1A ^Input
3
MOSI
Input
4
CLK
Input
5
SQB_HI_1A ^Output
6
VFIRE_1A ^Supply
7
VDIAG_1 Input
8
GND
Ground
9
MISO
Output
10
VDD
Input
11
VFIRE_1B ^Supply
12
SQB_HI_1B ^Output
13
FEN_1
Input
14
R_LIMIT_1 ^Output
Formal Name
Squib Lo 1A
Pin Description
Drain of the low-side switch that connects to the low pin of
Squib_1A
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).
Data Input 1
Serial data input for SPI interface.
Serial Clock
Serial clock input for SPI interface.
Squib Hi 1A
Drain of the high-side switch that connects to the low pin of
Squib_1A
Squib Firing Supply Firing supply pin for Squib_1A.
1A
Squib Diagnostic 1A Diagnostic pin for high-side safing sensor for squibs 1A and 1B
and 1A
and the VFIRE supply voltage.
Device Ground
Device ground pin for internal logic and diagnostic circuitry.
Data Output 0
Serial data output for SPI interface.
Logic Power
Device power pin for internal logic and diagnostic circuitry.
Squib Firing Supply Firing supply pin for Squib_1B.
1B
Squib Hi 1B
Drain of the high-side switch that connects to the low pin of
Squib_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
External resistor to ground is used to set current limit for
Squib_1A and squib_1B FET drivers.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33797
3