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              1. "
                1/12
                L9823
                March2002
                s
                OUTPUTSCURRENTCAPABILITYUPTO
                0.5A
                s
                CASCADABLESPICONTROLFOR
                OUTPUTS
                s
                RESETFUNCTIONWITHRESETSIGNALOR
                UNDERVOLTAGEATV
                DD
                s
                PROGRAMMABLEINTRINSICOUTPUT
                VOLTAGECLAMPINGATTYP.50VFOR
                INDUCTIVESWITCHING
                s
                OVERCURRENTSHUTDOWNWITHLATCH-
                OFFFOREVERYWRITECYCLE(SFPD=LOW)
                s
                INDEPENDENTTHERMALSHUTDOWNOF
                OUTPUTS(SOAPROTECTION)
                s
                OUTPUTSTATUSDATAAVAILABLEONTHE
                SPIUSING8-BITI/OPROTOCOLUPTO3.0MHZ
                s
                LOWSTANDBYCURRENTWITHRESET=
                LOW(TYP35
                μ
                A@VDD)
                s
                OPENLOADDETECTION(OUTPUTSOFF)
                s
                SINGLEV
                DD
                LOGICSUPPLY
                s
                HIGHEMSIMMUNITYANDLOWEME
                (CONTROLLEDOUTPUTSLOPES)
                s
                FULLFUNCTIONALITYOFTHEREMAINING
                DEVICEATNEGATIVEVOLTAGEDROPON
                OUTPUTS(-1,5VOR-3,0A)
                s
                OUTPUTMODEPROGRAMMABLEFOR
                SUSTAINEDCURRENTLIMITOR
                SHUTDOWN
                DESCRIPTION
                L9823isaOctalLow-SideDriverCircuit,dedicated
                forautomotiveapplications.Outputvoltageclamping
                isprovidedforflybackcurrentrecirculation,whenin-
                ductiveloadsaredriven.ChipSelectandcascadable
                Serial8-bitInterfaceforoutputscontrolanddiagnos-
                ticdatatransfer.
                SO24(20+2+2)
                ORDERINGNUMBER:L9823
                OctalLow-SideDriverforbulb,resistiveandinductiveloadswith
                serialinputcontrol,outputprotectionanddiagnostic
                BLOCKDIAGRAM
                Diag1
                Q1
                CSB
                SI
                SCLK
                SO
                OUT0
                OUT1
                OUT2
                OUT3
                OUT4
                OUT5
                OUT6
                OUT7
                GND
                Diag0
                Diag7
                Reset
                Q0
                CH0
                OT0
                Diag6
                Q6
                Q0
                Q7
                Diag2
                Q2
                CH3
                CH4
                CH5
                CH1
                Diag3
                Q3
                Diag4
                Q4
                Diag5
                Q5
                Q7
                CH7
                Diag7
                Reset
                Reset
                Undervoltage
                RESET
                Q1
                Q2
                Q3
                Q4
                Q5
                Q6
                Diag1
                Diag2
                Diag3
                Diag4
                Diag5
                Diag6
                IOL
                24
                23
                14
                13
                12
                11
                2
                1
                22
                9
                4
                3
                10
                5-8
                17-20
                Over
                Temperature
                Detect
                +
                -
                +
                -
                =
                =
                +
                -
                Gate
                Control
                OL0
                CH2
                CH7
                SFPD
                15VDG
                Diag0
                16
                VDD
                ISCB0
                9uu