L9654
Quad squib driver and dual sensor interface
ASIC for safety application
Datasheet - production data
Support Manchester protocol for satellite
sensors
Supports for variable bit rate detection
Independent current limit and fault timer
shutdown protection for each satellite output
Short to ground and short to battery detection
and reporting for each satellite channel
*$3*36
LQFP48
5.5 MHz SPI interface
Features
Satellite message error detection
4 deployment drivers sized to deliver 1.2 A
(min) for 2 ms (min) and 1.75 A (min) for
1ms (min).
2 kV ESD capability on all pins
Low voltage internal reset
Package: 48 lead LQFP
Technology: ST Proprietary BCD5s (0.57 μm)
Independently controlled high-side and lowside MOS for diagnosis
Analog output available for resistance
Description
Squib short to ground, short to battery and
MOS diagnostic available on SPI register
L9654 is intended to deploy up to 4 squibs and to
interface up to 2 satellites.
Capability to deploy the squib with 1.2 A (min.)
or 1.75 A under 35 V load-dump condition and
the low-side MOS is shorted to ground
Squib drivers are sized to deploy 1.2 A (min.) for
2 ms (min.) during load dump and 1.75 A (min.)
for 1 ms (min.) during load dump.
Capability to deploy the squib with 1.2 A (min.)
at 6.9 V VRES and 1.75 A at 12 V VRES.
Diagnostic of squib driver and squib resistance
measurement is controlled by micro controllers.
Interface with 2 satellite sensors
Programmable independent current trip points
for each satellite channel
Satellite interfaces support Manchester decoder
with variable bit rates.
Table 1. Device summary
Order code
Package
Packing
L9654
LQFP48
Tray
L9654TR
LQFP48
Tape and reel
November 2013
This is information on a product in full production.
DocID14218 Rev 3
1/59
www.st.com
Contents
L9654
Contents
1
2
Block diagram and application schematic . . . . . . . . . . . . . . . . . . . . . . . 7
1.1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2
Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
3
4
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.1
DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.2
AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2
Power on reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3
RESETB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4
MSG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5
IREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6
Loss of ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7
Deployment and reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.8
Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.9
4.8.1
Chip select (CS_A, CS_D, CS_S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.2
Serial clock (SCLK, SCLK_A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.3
Serial data output (MISO, MISO_A) . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.4
Serial data input (MOSI, MOSI_A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Deployment drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.9.1
4.10
2/59
Arming interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DEPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.10.1
Deployment driver diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.10.2
Continuity diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.10.3
Short to battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
DocID14218 Rev 3
L9654
Contents
4.11
4.12
4.13
4.14
4.10.4
Short to ground and open circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.10.5
Resistance measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.10.6
MOS diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.10.7
Low-side MOS diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.10.8
High-side MOS diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.10.9
Loss of ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Deployment driver SPI bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.11.1
Deployment driver MOSI bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.11.2
Deployment driver register mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.11.3
Deployment driver command mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.11.4
Deployment driver diagnostic mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.11.5
Deployment driver monitor mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.11.6
Deployment driver MISO bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.11.7
Deployment driver register mode response . . . . . . . . . . . . . . . . . . . . . . 39
MISO register mode response summary . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.12.1
Deployment driver command mode response . . . . . . . . . . . . . . . . . . . . 41
4.12.2
Deployment driver diagnostic mode response . . . . . . . . . . . . . . . . . . . . 42
4.12.3
Deployment driver status response . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.12.4
Deployment driver SPI fault response . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Arming SPI bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.13.1
Arming MOSI_A bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.13.2
ARM[01..23] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.13.3
ARM[01..23]* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.13.4
Arming MISO_A bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.13.5
ARM[01..23] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Satellite sensor interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.14.1
Current sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.14.2
Manchester decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4.14.3
Communication protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.14.4
"A" protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.14.5
"B" variable length protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.14.6
FIFO buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.14.7
Satellite continuity check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.14.8
Message waiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.14.9
Satellite serial data input (MOSI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.14.10 Satellite MOSI bits definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.14.11 Satellite module configuration register (CH1 only) . . . . . . . . . . . . . . . . 50
DocID14218 Rev 3
3/59
4
Contents
L9654
4.14.12 Channel configuration registers (CCR1, CCR2, CCR3, CCR4) . . . . . . . 51
4.14.13 SPI MISO bits layout for configuration report . . . . . . . . . . . . . . . . . . . . 55
5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4/59
DocID14218 Rev 3
L9654
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Table 29.
Table 30.
Table 31.
Table 32.
Table 33.
Table 34.
Table 35.
Table 36.
Table 37.
Table 38.
Table 39.
Table 40.
Table 41.
Table 42.
Table 43.
Table 44.
Table 45.
Table 46.
Table 47.
Table 48.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maximum operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DC specification general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DC specification: deployment drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Satellite interface DC specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
AC specification: deployment drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
AC specifications: satellite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SPI timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SPI transmission during a deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Deployment driver SPI response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
MOSI bit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
MOSI mode bits definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
MOSI register mode message definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Pulse stretch timer table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MOSI command mode message definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MOSI diagnostic mode message definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Channel selection decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
MOSI monitor mode message definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
MISO bit layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MISO mode bits definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MISO register mode response definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MISO register mode response summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
MISO command mode response definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
MISO diagnostic mode response definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
MISO status response definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
MISO SPI fault response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Arming MOSI_A bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Arming MISO_A bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Satellite MOSI bits layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
MOSI satellite interface registers map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Master configuration register definition (CH1 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Channel configuration register definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Current ranges supported are given in following table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Satellite/decoder control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
"B" protocol configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Bit time selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Mode select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
SPI mode selects reply for satellite channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Satellite MISO bits definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
SPI MISO bits layout when reporting FIFO data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
MISO Manchester message data definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Status bits definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Satellites fault codes definition supporting "A" protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Satellites fault codes definition supporting "B" protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
DocID14218 Rev 3
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5
List of figures
L9654
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
6/59
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MOS settling time and turn-on time 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
MOS settling time and turn-on time 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SPI timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SPI timing measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SPI block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Arming daisy-chain configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Arming SPI transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Deployment drivers diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Deployment sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Deployment flow chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Deployment driver diagnostic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Continuity diagnostic flow chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Resistance measurement flow chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Low-side diagnostic flow chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
High-side driver diagnostic flow chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Satellite interface block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Manchester decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Manchester decoding using satellite protocol as an example. . . . . . . . . . . . . . . . . . . . . . . 47
"A" satellite protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
"B" satellite protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
LQFP48 mechanical data and package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
DocID14218 Rev 3
L9654
Block diagram and application schematic
1
Block diagram and application schematic
1.1
Block diagram
Figure 1. Block diagram
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Figure 2. Application schematic
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DocID14218 Rev 3
7/59
58
Pin description
2
L9654
Pin description
Table 2. Pin function
8/59
Pin #
Pin name
Description
I/O type
Reset state
1
MISO_A
Output
Hi-Z
2
NC
-
-
3
RESETB
Input
Pullup
4
GND
Signal ground (analog & digital)
-
-
5
VDD
VDD supply voltage
Input
-
6
NC
-
-
7
CS_A
SPI chip select for arming interface
Input
Pulldown
8
CS_S
SPI chip select for satellite interface
Input
Pulldown
9
CS_D
SPI Chip select for deployment driver
Input
Pulldown
10
DEPEN
Deployment enable
Input
Pulldown
11
MOSI
SPI data in
Input
Hi-Z
12,13
NC
No connect
-
-
14
MOSI_A
Arming SPI data in
Input
Hi-Z
15
SCLK_A
Arming SPI clock
Input
Hi-Z
16
SCLK
SPI clock
Input
Hi-Z
17
GND2
Power ground for loop channel 2
-
-
18
SQL2
Low-side driver output for channel 2
Output
Pulldown
19
SQH2
High-side driver output for channel 2
Output
Hi-Z
20
VRES2
Reserve voltage for loop channel 2
Input
-
21
VRES3
Reserve voltage for loop channel 3
Input
-
22
SQH3
High-side driver output for channel 3
Output
Hi-Z
23
SQL3
Low-side driver output for channel 3
Output
Pulldown
24
GND3
Power ground for loop channel 3
-
-
25
TEST
Test pin
Input
Pulldown
26
NC
-
-
27
V8BUCK
Input
-
28
NC
-
-
29
ICH2
Output
Hi-Z
30
NC
-
-
31
ICH1
Output
Hi-Z
32
NC
-
-
33
IREF
Output
-
Arming SPI data out
No connect
Reset pin
No connect
No connect
Supply Voltage for Satellite Interface and Resistance
Measurement
No connect
Current sense output for channel 2
No connect
Current sense output for channel 1
No connect
External current reference resistor
DocID14218 Rev 3
L9654
Pin description
Table 2. Pin function (continued)
Pin #
34
2.1
Pin name
Description
I/O type
Reset state
-
-
Output
Hi-Z
No connect
-
-
-
-
AOUT_GND Ground reference for AOUT
35
AOUT
Analog output for loop diagnostics
36
NC
37
GND1
Power ground for loop channel 1
38
SQL1
Low-side driver output for channel 1
Output
Pulldown
39
SQH1
High-side driver output for channel 1
Output
Hi-Z
40
VRES1
Reserve voltage for loop channel 1
Input
-
41
VRES0
Reserve voltage for loop channel 0
Input
-
42
SQH0
High-side driver output for channel 0
Output
Hi-Z
43
SQL0
Low-side driver output for channel 0
Output
Pulldown
44
GND0
Power ground for loop channel 0
-
-
45
NC
No connect
-
-
46
MSG
Message waiting
Output
Pulldown
47
MISO
SPI data out
Output
Hi-Z
48
NC
No connect
-
-
Thermal data
Table 3. Thermal data
Symbol
Rth j-amb
Parameter
Thermal resistance junction-to-ambient
DocID14218 Rev 3
Value.
Unit
68
°C/W
9/59
58
Electrical specification
L9654
3
Electrical specification
3.1
Maximum ratings
The device may not operate properly if maximum operating condition is exceeded.
Table 4. Maximum operating conditions
Symbol
VDD
V8BUCK
VRES
Parameter
Supply voltage
V8BUCK voltage
VRES voltage (VRES0, VRES1, VRES2, VRES3)
VI
Discrete input voltage (RESETB, DEPEN, CS_A, CS_D, CS_S, SCLK,
SCLK_A, MOSI, MOSI_A, MISO, MISO_A)
Tj
Junction temperature
3.2
Value
Unit
4.9 to 5.1
V
7 to 8.5
V
35
V
0.3 to (VDD +0.3)
V
-40 to 150
°C
Absolute maximum ratings
Maximum ratings are absolute ratings; exceeding any one of these values may cause
permanent damage to the integrated circuit.
Table 5. Absolute maximum ratings
Symbol
Value
Unit
-0.3 to 5.5
V
V8BUCK voltage
0.3 to 40
V
VRES
VRES voltage (VRES0, VRES1, VRES2, VRES3)
0.3 to 40
V
SQL-H
Squib high and low-side drivers (SQH0, SQH1, SQH2, SQH3,
SQL0, SQL1, SQL2, SQL3)
0.3 to 40
V
-0.3 to 5.5
V
-3 to 40
V
-0.3 to 5.5
V
150
°C
VDD
V8BUCK
VI
ICHx
Parameter
Supply voltage
Discrete input voltage (RESETB, DEPEN, CS_A, CS_D, CS_S, SCLK,
SCLK_A, MOSI, MOSI_A, MISO, MISO_A)
Satellite input voltage (ICH1, ICH2, ICH3, ICH4)
-
Analog/digital outputs voltage (AOUT, IREF, MSG, IF3V3, IF4V4)
Tj
Maximum steady-state junction temperature
Tamb
Ambient temperature
-40 to 95
°C
Tstg
Storage temperature
-65 to 150
°C
10/59
DocID14218 Rev 3
L9654
Electrical specification
3.3
Electrical characteristics
3.3.1
DC characteristics
VRES = 6.5 to 35 V, VDD = 4.9 to 5.1 V, V8BUCK = 7.0 V to 8.5 V, Tamb = -40°C to +95°C.
Table 6. DC specification general
Symbol
Parameter
(1)
VRST
VRST_L
(2)
IDD
RIREF_H
RIREF_L
Internal voltage reset VDD
Input current VDD
Resistance threshold IREF
VIH_RESETB
Input voltage threshold
VIL_RESETB
RESETB
VHYS
VIH_DEPEN Input voltage threshold
VIL_DEPEN DEPEN
IPD
VIH_TEST
VIL_TEST
ITEST
IPU
IV8BUCK
VIH
VIL
VHYS
Input pull-down current
DEPEN
Test condition
Min.
Typ
Max.
VDD drops until deployment drivers
are disabled
4.0
-
4.5
2.1
-
3.0
Normal operation; ICH1-2 = 0 A
4.5
-
7.0
Unit
V
Short to –0.3V on SQH; ICH1-2 = 0 A
4.2
-
7.9
Short to –0.3V on SQL; ICH1-2 = 0A
4.2
-
7.9
Deployment; ICH1-2 = 0A
4.2
-
7.9
-
20.0
-
60.0
kΩ
mA
-
2.0
-
9.0
kΩ
-
-
-
2.0
V
-
0.8
-
-
100
-
400
mV
V
-
-
-
2.0
V
-
0.8
-
-
V
VIN = VIL to VDD
10
-
50
μA
-
-
-
3.6
V
-
0.8
-
-
V
Input pull-down current TEST TEST = 5 V
1.0
-
2.5
mA
Input pull-up current RESETB RESETB = VIH to GND
10
-
60
μA
Current consumption
V8BUCK
25
-
40
μA
-
-
2.0
V
0.8
-
-
V
100
-
400
mV
-
1
μA
Input voltage threshold TEST
-
Input voltage threshold MOSI, Input Logic = 1
MOSI_A, SCLK, SCLK_A,
Input Logic = 0
CS_S, CS_D, CS_A
-
ILKG
Input leakage current MOSI,
MOSI_A, SCLK, SCLK_A
IPD
Input pulldown current
CS_S, CS_D, CS_A
VIN = VDD
VIN = 0 to VIH
-1
-
-
μA
VIN = VIL to VDD
10
-
50
μA
IOH = -800 μA
VDD–0.8
-
-
V
VOL
Output voltage MISO,
MISO_A, MSG
IOL = 1.6 mA
-
-
0.4
V
IHI_Z
Tri-state current MISO,
MISO_A,
MISO = VDD
-
-
1
μA
MISO = 0 V
-1
-
-
μA
VOH
1. VRST shall have a POR de-glitch timer.
2. VRST L shall have no timer.
DocID14218 Rev 3
11/59
58
Electrical specification
L9654
VRES = 6.5 to 40 V, VDD = 4.9 to 5.1 V, V8BUCK = 7.0 V to 8.5 V, Tamb = -40 °C to +95 °C.
Table 7. DC specification: deployment drivers
Symbol
VOH
Parameter
Output voltage AOUT
VOL
IZ
ILKG
Tri-state current AOUT
Leakage current SQH
ISTG
ILKG
Bias current VRES(1)
ILKG
ISTG
Leakage current SQL
ISTB
Test conditions
Min.
Typ
Max.
Units
High Saturation Voltage; IAOUT = -500μA
VDD04
-
-
V
Low Saturation Voltage; IAOUT = +500μA
-
-
0.3
V
AOUT = VDD
-
-
1
μA
AOUT = 0V
-1
-
-
μA
V8BUCK = VDD = 0, VRES = 36 V,
VSQH = 0 V
-
-
50
μA
V8BUCK = 18V; VDD = 5V; VSQH = -0.3V
-5
-
-
mA
V8BUCK = 18 V; VDD = 5 V;
VRES = 36V; SQH shorted to SQL
-
-
10
μA
V8BUCK = VDD = 0, VSQL = 18 V
-10
-
10
μA
V8BUCK = 18 V; VDD = 5V; VSQL = -0.3 V
-5
-
-
mA
V8BUCK = 18 V; VDD = 5 V;
VSQL = 18 V
-
-
5
mA
IPD
Pull-down current SQL
VSQL = 1.8 V to VDD
900
-
1300
μA
IPD_SQH
Pull-down current SQH
VSQH = SBTH to VRES
900
-
1300
μA
VBIAS
Diagnostics bias voltage
ISQH = -1.5 mA (nominal: 2.0 V)
1.80
-
2.20
V
IBIAS
Diagnostics bias current
VSQH = 0V
-7
-
-
IPD
VSTB
Short to battery threshold (Nominal 3.0 V)
2.70
-
3.30
V
VSTG
Short to ground threshold (Nominal 1.0 V)
0.90
-
1.10
V
VI_th
MOS test load voltage
detection
-
100
-
300
mV
ISRC
Resistance
measurement current
source
VDD = 5.0 V; V8BUCK = 7.0 V to 26.5 V
38
-
42
mA
ISINK
Resistance measurement
current sink
-
45
-
55
mA
RDSon
Total high and low-side
MOS On resistance
High-side MOS + Low-side
MOS VRES = 6.9 V; I = 1.2 A @95 °C
-
-
2.0
Ω
RDSon
High-side MOS on
resistance
VRES = 35 V; IVRES = 1.2 A;
Tamb = 95 °C
-
-
0.8
Ω
RDSon
Low-side MOS on
resistance
VRES = 35 V; IVRES = 1.2 A;
Tamb = 95 °C
-
-
1.2
Ω
MOSI Register mode bit D10=”0”
RLOAD = 1.7 ΩVRES = 6.9 to 35 V
1.20
-
1.47
A
MOSI Register mode Bit D10=”1”
RLOAD = 1.7 ΩVRES = 12 to 35 V
1.75
-
2.14
A
RLOAD = 1.75 Ω
2.15
-
3.5
A
0
-
10.0
Ω
IDEPL_12A
Deploiment current
IDEPL_175A
ILIM
Low-side MOS current
limit
RL RANGE
Load resistance range(2)
1. Not applicable during a diagnostic.
2. Test conditions for load resistance measurements
12/59
DocID14218 Rev 3
L9654
Electrical specification
VDD = 4.9 to 5.1 V, V8BUCK = 7.0 V to 8.5 V, Tamb = -40 °C to +95 °C.
Table 8. Satellite interface DC specifications
Symbol
I_Lim
Vhdp
Parameter
Current limit
High-side voltage drop
Test conditions
Min
Typ
Max
Unit
High-side short to -0.3 V
(-)75
-
(-)150
mA
High-side short to Battery
-
-
5
mA
V8BUCK =Vcc=0
measured @ V8BUCK
-
-
5
mA
I=50 mA @105°C; V8BUCK=7.0V
-
-
1
V
I=25 mA @105°C; V8BUCK=7.0V
-
-
0.5
V
Bit
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