SGS Thomson Microelectronics L98SI Datasheet
L98SI
OCTALSERIAL SOLENOID DRIVER
.EIGHTLOWR
(0.5ΩATI
=1A@25°CVCC=5V±5%)
O
DMOSOUTPUTS
DSon
.8 BITSERIAL INPUT DATA (SPI)
.
8 BIT SERIAL DIAGNOSTIC OUTPUT FOR
OVERLOADANDOPENCIRCUITCONDITIONS
.OUTPUT SHORT CIRCUITPROTECTION
.CHIPENABLESELECTFUNCTION(activelow)
.INTERNAL 36V CLAMPINGFOR EACH OUT-
PUT
.CASCADABLE WITH ANOTHER OCTAL
DRIVER
.LOWQUIESCENTCURRENT (10mAMAX.)
.
PACKAGE PowerSO20
DESCRIPTION
TheL98SI is anoctal low side solenoiddriverrea
lizedin Multipower-BCDtechnologyparticularlysuited for drivinglamps,relays and solenoidsin indu-
BLOCKDIAGRAM
MULTIPO WER BCD TECHNOLOG Y
PowerSO20
ORDERING NUMBER: L98SI
strial environment.The L98SIDMOSoutputshave
verylow power consumption.
Data is transmitted serially to the device usingthe
SerialPeripheralInterface(SPI) protocol.
The L98SI features the outputs status monitoring
function.
April 1998
1/9
L98SI
PIN CONNECTION(topview)
GND
SO
V
DD
RESET
OUT7
OUT6
OUT5
OUT4
N.C. N.C.
GND GND
2
3
4
5
6
7
8
9
10
D94AT119
20
19
18
17
16
15
14
13
12
11
GND1
SI
SCLK
CE
OUT0
OUT1
OUT2
OUT3
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
DC Logic Supply – 0.7 7 V
Output Voltage internally clamped V
Input Transient Current
(CE, SI, SCLK, RESET, SO) :
Duration Time t = 1s,
VI<0
V
I>VCC
–25
Continuous Output Current (for each output) Int. Limited A
Junction and Storage Temperature Range – 40 150
stg
Max Clamping Energy (for each output) 200 mJ
+25
T
j
V
DD
V
O
I
I
I
Odc
,T
E
X
mA
mA
°
C
THERMAL DATA
Symbol Parameter Value Unit
Thermal Resistance Junction-Case Max. 1.5
Thermal Resistance Junction-Ambient Max. 60
2/9
R
th j-case
R
th j-amb
C/W
°
C/W
°
PIN DESCRIPTION
L98SI
V
CC
Logicsupplyvoltage - nominally 5V
GROUND
DeviceGround.Thisgroundappliesforthelogiccircuitsas well as the poweroutputstages.
RESET
Asynchronousresetfortheoutputstages,theparal-
lellatchand theshiftregisterinsidethe L98SI.This
pinisactivelowandit mustnot beleftfloating.Apoweron clearfunctionmaybe implementedconnecting this pin to V
with an external resistor and to
CC
groundwith an externalcapacitor.
CE
ChipEnable. Datais transferredfromthe shift registerstotheoutputson the risingedgeof thissignal.
Thefalling edgeof this signalsets the shiftregister
with the outputvoltagesensebits coming from the
output stages.The output driver for the SO pin is
enabledwhen this pinis low.
SO
SerialOutput.This pin is theserial outputfrom the
shift register and it is tri-stated when CE is high.A
highfor a data bit on this pin indicatesthat the par-
ticularoutput is high. A low on thispin for adata bit
indicatesthat the outputis low.
Comparing the serial output bits with the previous
serial input bits the external microcontroller implementsthediagnosticdata suppliedby theL98SI.
SI
SerialInput.Thispin is theserialdata input.A high
onthispinwillprogramaparticularoutputtobeOFF,
whilea lowwill turn itON.
SCLK
SerialClock.This pin clocksthe shift register.New
SO data will appearon every rising edgeof thispin
andnewSIdatawillbe latchedoneverySCLK’sfallingedgeinto theshiftregister.
OUTPUTS00-07
Poweroutputpins.The inputandoutputbitscorres-
pondingto07 aresentandreceivedfirstviatheSPI
busand 00is thelast.Theoutputsareprovidedwith
currentlimiting andvoltagesensefunctionsfor fault
indicationand protection.The nominal load current
for theseoutputsis 500mA,but the current limiting
issetto a minimumof1.05A.Theoutputsalsohave
on board clamps set at about 36V for recirculation
of inductiveloadcurrent.
ELECTRICALCHARACTERISTICS (V
Symbol Parameter Test Conditions Min. Typ. Max. Unit
Output Clamping Volt. IO= 0.5A, Output Programmed OFF 30 40 V
Out. Leakage Current VO= 24V, Output Progr. OFF 1 mA
On Resistance Output Progr. ON
Out. Self Limiting
Current
Turn-on Delay IO= 500mA
Turn-off Delay IO= 500mA
Fault Refer. Voltage Output Progr. OFF
Fault Reset Delay
(after CE L to H
transition)
Output OFF Voltage Output Pin Floating.cOutput Progr. OFF, 1.0 V
I
R
V
V
V
OC
Oleak
DSon
I
OL
t
PHL
t
P
OREF
t
UD
OFF
=5V±5%.Tj=– 40to 125°C ; unlessotherwise speciifed)
CC
I
= 0.5A
O
= 0.8A
I
O
I
=1A
O
With Fault Reset Disabled
Output Progr. ON 1.05 A
No Reactive Load
No Reactive Load
1.6 2 V
Fault detected if V
See fig. 3 75 250 µs
O>VOREF
0.55
0.55
0.55
1
1
1
10
10
Ω
Ω
Ω
s
µ
s
µ
3/9
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