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PDF L9662 Data sheet ( Hoja de datos )
| Número de pieza | L9662 | |
| Descripción | Octal squib driver and quad Manchester/PSI5 encoded sensor interface ASIC | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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L9662
Octal squib driver and quad Manchester/PSI5 encoded sensor
interface ASIC for safety application
Datasheet - production data
'!0'03
LQFP64 (10x10x1.4mm)
Features
8 deployment drivers with SPI selectable firing
current and times
Capability to deploy the squib with 1.2 A
(min)/2 ms, 1.75 A (min)/1.0 ms and 1.75 A
(min)/0.65 ms between VRES of 7 V to 37 V
Capability to deploy the squib with 1.5 A
(min)/2 ms between VRES of 7 V to 25 V
Firing capability to deploy all channels
simultaneously
Independently controlled high-side and low-
side MOS for diagnosis
Analog output available for resistance
measurement
Squib short to ground, short to battery and
MOS diagnostic available on SPI register
Capability to deploy the squib the low side
MOS is shorted to ground
4 Fire enable inputs
Interface with 4 satellite sensors
Programmable independent current trip points
for each satellite channel
Support Manchester 1 or 2 protocol for satellite
sensors
Support PSI5 (Parity) protocol for satellite
sensors (reference PSI5 technical specification
V 1.2 /14.06.07)
Support for Sync pulse and minibus for satellites
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
2 independent SPI interfaces
5.5 MHz SPI interface
Satellite message error detection
Hall effect sensor support on satellite channels
3 and 4.
Low voltage internal reset
2 kV ESD capability on all pins
Package: LQFP64
Technology: ST Proprietary BCD5
Description
The device is intended to deploy up to 8 squibs
and to interface up to 4 satellites. 2 satellite
interfaces can be used to interface Hall sensors.
Squib drivers are sized to deploy 1.2 A minimum
for 2 ms, 1.75 A minimum for 1 ms and 1.75 A
minimum for 0.65 ms during load dump along with
1.5 A minimum for 2 ms for VRES voltages less
than 25 V.
Full diagnostic capabilities of the squib interface
are provided. Satellite interfaces support
Manchester 1, 2 and PSI5 decoding with variable
bit rate.
Order code
L9662
L9662TR
Table 1. Device summary
Amb. temp range, C
Package
-40 to +85
LQFP64
Packing
Tray
Tape & Reel
September 2015
This is information on a product in full production.
DocID028325 Rev 1
1/80
www.st.com
1 page  
L9662
List of tables
Table 49. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
DocID028325 Rev 1
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5
5 Page 
L9662
Electrical specifications
Symbol
AGND
GND
Tj
Tamb
Tstg
Rth j amb
Table 3. Absolute maximum ratings
Parameter
Analog output reference
Ground (GND, GND0, GND1, GND2, GND3, GND4, GND5,
GND6, GND7)
Maximum steady-state junction temperature
Ambient temperature
Storage temperature
Thermal resistance junction-to-ambient
Value
-0.3 to 6.0
-0.3 to 6.0
150
-40 to 95
-65 to 150
46
Unit
V
V
°C
°C
°C
°C/W
2.2 Absolute maximum degraded operating ratings
Under the following deviations to the ratings indicated in Section 2.3 the device performance
will be degraded and not meet the electrical characteristics outlined in Section 2.4. At
minimum the SPI and diagnostics will function but not meet specified electrical parameters.
Symbol
VDD
VSDIAG
VSATS
VSYNC
VRES
VI
Tj
Table 4. Absolute maximum degraded operating ratings
Parameter
Value
Supply voltage
4.5 to 5.5
Supply voltage for squib diagnostics
Satellite supply voltage
Sync supply voltage
VRES voltage (VRES0, VRES1, VRES2, VRES3, VRES4,
VRES5, VRES6, VRES7)
7 to 40
7 to 14
(VSATS+ 5.5 V) to 40
7 to 40
Discrete input voltage (RESETB, DEPEN, CS_D, CS_S,
SCLK, SCLK_S, MOSI, MOSI_S, MISO, MISO_S, FEN1,
FEN2, FEN3, FEN4, INITSYNC)
- 0.3 to (VDD +0.3)
Junction temperature
-40 to 150
Unit
V
V
V
V
V
V
°C
Note:
The above is provided for informational purposes only and will result in degraded operation.
Under the above conditions the SPI will be functional as well as diagnostics, though the
electrical performance may not conform to the parameters outlined in Section 2.4. Firing
requirements as indicated in Section 2.4 may not be met with the conditions above.
DocID028325 Rev 1
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79
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L9662.PDF ] | |
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