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Motorola Electronic Components Datasheet

MC33298 Datasheet

OCTAL SERIAL SWITCH (SPI Input/Output)

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MC33298
Octal Serial Switch with
Serial Peripheral Interface I/O
The MC33298 is an eight output low side power switch with 8 bit serial input
control. The MC33298 is a versatile circuit designed for automotive
applications, but is well suited for other environments. The MC33298
incorporates SMARTMOStechnology, with CMOS logic, bipolar/MOS
analog circuitry, and DMOS power MOSFETs. The MC33298 interfaces
directly with a microcontroller to control various inductive or incandescent
loads. The circuit’s innovative monitoring and protection features are: very low
standby current, cascadable fault reporting, internal 65 V clamp on each
output, output specific diagnostics, and independent shutdown of outputs. The
MC33298 is parametrically specified over a temperature range of – 40°C TA
+125°C ambient temperature and 9.0 V VPWR 16 V supply. The
economical 20 pin DIP and SO–24 wide body surface mount plastic packages
make the MC33298 very cost effective.
Designed to Operate Over Wide Supply Voltages of 5.5 V to 26.5 V
Interfaces Directly to Microprocessor Using SPI Protocol
SPI Communication for Control and Fault Reporting
8–Bit Serial I/O is CMOS Compatible
3.0 A Peak Current Outputs with Maximum RDS(on) of 0.45 at 25°C
Outputs are Current Limited to 3.0 A to 6.0 A for Driving Incandescent
Lamp Loads
Output Voltages Clamped to 65 V During Inductive Switching
Maximum Sleep Current (IPWR) of 50 µA with VDD 2.0 V
Maximum of 4.0 mA IDD During Operation
Maximum of 2.0 mA IPWR During Operation with All Outputs “On”
Open Load Detection (Outputs “Off”)
Overvoltage Detection and Shutdown
Each Output has Independent Over Temperature Detection and Shutdown
Output Mode Programmable for Sustained Current Limit or Shutdown
Short Circuit Detect and Shutdown with Automatic Retry for Every
Write Cycle
Serial Operation Guaranteed to 2.0 MHz
SFPD
Micro–
controller
with Bus
SFPD
CSB
SCLK
SI
Reset
SO
Simplified Application
VDD VPWR
CMOS
Input
Logic
CMOS
Serial Shift
Registers
and
Latches
Updrain
DMOS
Output
Switches
and
Sense
Circuits
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
+Vbat
OCTAL SERIAL SWITCH
(SPI Input/Output)
SEMICONDUCTOR
TECHNICAL DATA
20
1
P SUFFIX
PLASTIC PACKAGE
CASE 738
DIP (16+2+2)
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
SOP (16+4+4)L
PIN CONNECTIONS
DIP Function SOP–24L
1 Output 7 1
2 Output 6 2
3 SCLK 3
4 SI 4
5 Ground 5
6 Ground 6
– Ground 7
– Ground 8
7 SO 9
8
CSB
10
9
Output 5
11
10 Output 4 12
11 Output 3 13
12 Output 2 14
13 SFPD 15
14 VDD 16
15 Ground 17
16 Ground 18
Ground
19
Ground
20
17 VPWR 21
18 Reset 22
19 Output 1 23
20 Output 0 24
ORDERING INFORMATION
Device
Tested Operating
Temperature Range Package
This device contains 1,200 active transistors.
Gnd
MC33298P
DIP
MC33298DW TC = – 40° to +125°C SOP–24L
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 2
1


Motorola Electronic Components Datasheet

MC33298 Datasheet

OCTAL SERIAL SWITCH (SPI Input/Output)

No Preview Available !

VDD
SFPD
Reset
CSB
SCLK
SI
SO
MC33298
Figure 1. Simplified Block Diagram
VPWR
20 µA
20 µA
Fault
Timers
Overvoltage
Detect
Voltage
Regulator
OVD
RB
SFPDB
SFL
CSB
SCLK
SI
SO
CSI
CSBI
GE
OT
SF
OF
SPI
Interface
Logic
Bias
Gate
Control
Open
Load
Detect
Serial D/O
Line Driver
Short
Circuit
Detect
Over
Temperature
Detect
From Detectors 1 to 7
65 V
To Gates
1–7
ILimit
RS
Output 0
Outputs
1–7
Grounds
FAULT OPERATION
SERIAL OUTPUT (SO) PIN REPORTS
Overvoltage
Overvoltage condition reported.
Over Temperature
Fault reported by Serial Output (SO) pin.
Over Current
SO pin reports short to battery/supply or over current condition.
Output “On,” Open Load Fault
Not reported.
Output “Off,” Open Load Fault
SO pin reports output “off” open load condition.
DEVICE SHUTDOWNS
Overvoltage
Total device shutdown at VPWR = 28–36 V. Re–operates when overvoltage is removed with
all outputs assuming an off state upon recovery from overvoltage. All device registers are
automatically reset (cleared) during shutdown.
Over Temperature
Only the output experiencing an over temperature shuts down.
Over Current
Only the output experiencing an over current condition shuts down at 3.0 A to 6.0 A after a
25 µs to 100 µs delay, with SFPD pin grounded. All outputs will continue to operate in a current
limit mode, with no shutdown, if the SPFD pin is at 5.0 V.
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33298
Description OCTAL SERIAL SWITCH (SPI Input/Output)
Maker Motorola
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MC33298 Datasheet PDF






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