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L9679P Datasheet(PDF) 257 Page - STMicroelectronics |
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L9679P Datasheet(HTML) 257 Page - STMicroelectronics |
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257 / 279 page  DS11627 Rev 7 257/279 L9679P Electrical characteristics 278 16 Vt2 Sync pulse amplitude IRSU = 4 - 35 mA Referred to VRSUx voltage before sync pulse Syncboost = 12 V, 14.75 V, 18 V and 35 V 3.8 - - V 17 VSYNCDROP Sync drop-out voltage VSYNCBOOST - VRSUx 1 - - V 18 ILIM_SYNC_LS Sync pulse current limit (LS driver) - 50 - 80 mA 19 ILIM_SYNC Static current limitation for each transceiver output RSUx During sync pulse generator VRSUx=GND -240 - -120 mA 20 C1 Capacitor on RSUx Regulator 22 nF nominal Design Info 13 - - nF 21 RE2 RSU damping resistance Design info - 2.5 - Ω 22 C2 ECU pin capacitance 5 nF nominal Design Information, not tested 4 - 6 nF 23 - Total number of sensors connected to bus Design info 1 - 3 - Table 62. PSI-5 satellite transceiver - DC specifications (continued) No Symbol Parameter Conditions Min Typ Max Unit Table 63. PSI-5 satellite transceiver - AC specifications No Symbol Parameter Conditions Min Typ Max Unit 1 TBit_125k Bit time (125kbps mode) At the sensor connector 7.6 8 8.4 μs 2 TBit_189k Bit time (189kbps mode) At the sensor connector 5 5.3 5.6 μs 3 TFLT_OCTH_PSI5 Over Current Detection deglitch filter time Normal operation 500 - 600 μs 4 TBLK_OCTH_PSI5 Over Current Detection Blanking Time At interface power on (BLKTxSEL = 0) 4.6 - 5.4 ms 5 At interface power on (BLKTxSEL = 1) 9.4 - 10.8 ms 6 TSTBTH Reverse Battery Blocking Enable Time - 12 - 16 μs 7 t0 Reference time @0.5 V on top of V(RSUx) Syncboost = 12 V, 14.75 V, 18 V and 35 V - 0 - - 8 t1 Start delay time From t0 to SATSYNC Syncboost = 12 V, 14.75 V, 18 V and 35 V -3 - - μs |
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