33797_11 Datasheet, PDF (4/35 Pages) Freescale Semiconductor, Inc – Four Channel Squib Driver IC

PIN CONNECTIONS
Table 1. Pin Function Description (continued)
Pin
Pin Name
Pin Function
Formal Name
Pin Description
16
SQB_LO_1B ^Output
Squib Lo 1B
Drain of the low side switch that connects to the low pin of
Squib_1B
17
SQB_LO_2B Output
Squib Lo 2B
Drain of the low side switch that connects to the low pin of
Squib_2B
18
SENSE_2B ^Input
Squib Sense 2B
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).
19
R_LIMIT_2 Output
Limit Resistor - 2A
and 2B
External resistor to ground is used to set current limit for
Squib_2A and squib_2B FET drivers.
20
FEN_2 ^Input
FET Driver 2A
and 2B
Active high input signal to enable operation of the squib_2A and
Squib_2B FET drivers.
21
SQB_HI_2B ^Output
Squib Hi 2B
Drain of the high side switch that connects to the low pin of
Squib_2B.
22
VFIRE_2B Supply
Squib Firing Supply Firing supply pin for squib_2B.
2B
23
R_DIAG ^Input
Limit Resistor -
Diagnostic
External resistor to ground is used to set the diagnostic current
for squib resistance.
24
VFIRE_RTN Ground
Squib Fire Power
Ground
Power Ground for squibs 1A, 1B, 2A, and 2B
25
VFIRE_RTN ^Ground
Squib Fire Power
Ground
Power Ground for squibs 1A, 1B, 2A, and 2B
26
VDIAG_2 ^Supply
Squib Diagnostic 2A Diagnostic pin for high side safing sensor for squibs 2A and 2B
and 2b
and the VFIRE supply voltage.
27
VFIRE_2A Supply
Squib Firing Supply Firing supply pin for squib_ 2A
2A
28
SQB_HI_2A ^Output
Squib Hi 2A
Drain of the high side switch that connects to the low pin of
Squib_2A
29
RST
Input
30
CS
Input
31
SENSE_2A Input
Reset
Chip Select
Squib Sense 2A
Reset, Active Low
Chip Select for SPI interface, Active Low
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).
32
SQB_LO_2A ^Output
Squib Lo 2A
Drain of the low side switch that connects to the low pin of
Squib_2A
33797
4
Analog Integrated Circuit Device Data
Freescale Semiconductor