Order this document by MC33298/D
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 SMARTMOS™ technology, 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.
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Designed to Operate Over Wide Supply Voltages of 5.5 V to 26.5 V
OCTAL SERIAL SWITCH
(SPI Input/Output)
SEMICONDUCTOR
TECHNICAL DATA
20
1
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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
Ω
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
DIP
1
2
3
4
5
6
–
–
7
8
9
10
11
12
13
14
15
16
–
–
17
18
19
20
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
Function
Output 7
Output 6
SCLK
SI
Ground
Ground
Ground
Ground
SO
CSB
Output 5
Output 4
Output 3
Output 2
SFPD
VDD
Ground
Ground
Ground
Ground
VPWR
Reset
Output 1
Output 0
SOP–24L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Simplified Application
SFPD
VDD
VPWR
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Gnd
+Vbat
SFPD
CSB
Micro–
controller
with Bus
SCLK
SI
Reset
SO
CMOS
Input
Logic
CMOS
Serial Shift
Registers
and
Latches
Updrain
DMOS
Output
Switches
and
Sense
Circuits
ORDERING INFORMATION
Device
MC33298P
MC33298DW
Tested Operating
Temperature Range
TC = – 40° to +125°C
Package
DIP
SOP–24L
Rev 2
This device contains 1,200 active transistors.
©
Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
