|
|
Teilenummer | 33291L |
|
Beschreibung | Eight-Output Switch | |
Hersteller | Freescale Semiconductor | |
Logo | ||
Gesamt 25 Seiten www.DFaretaeSshceeatl4eUS.ceommiconductor
Technical Data
Eight-Output Switch with Serial
Peripheral Interface I/O
Document Number: MC33291L
Rev. 4.0, 11/2006
33291L
The 33291L device is an eight-output, low-side power switch with 8-
bit serial input control. The 33291L is a versatile circuit designed for
automotive applications, but is well suited for other environments. The
33291L incorporates SMARTMOS technology, with CMOS logic,
bipolar/MOS analog circuitry, and DMOS power MOSFETs. The
33291L interfaces directly with a microcontroller to control various
inductive or incandescent loads.
The circuit’s innovative monitoring and protection features include
very low standby current, SPI cascade fault reporting capability,
internal 53 V clamp on each output, output-specific diagnostics, and
independent shutdown of outputs.
The device is parametrically specified over an ambient temperature
range of -40°C ≤ TA ≤ 125°C and 9.0 V ≤ VPWR ≤ 16 V supply.
Features
• Designed to Operate Over Wide Supply Voltages of 5.5 V to 26.5 V
• Interfaces to Microprocessor Using 8-Bit SPI I/O Protocol up to 3.0
MHz
• 1.0 A Peak Current Outputs with Maximum RDS(ON) of 1.6 Ω at TJ -
150°C
• Outputs Current-Limited to Accommodate In-Rush Currents
Associated with Switching Incandescent Loads
• Output Voltages Clamped to 53 V During Inductive Switching
• Maximum Sleep Current (IPWR) of 25 µA
• Maximum of 4.0 mA IDD During Operation
• Pb-Free Packaging Designated by Suffix Code EG
LOW-SIDE SWITCH
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42344B
24-PIN SOICW
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33291LDW/R2
-40°C to 125°C
MCZ33291LEG/R2
24 SOICW
VDD
MCU
33291L
VPWR OP 0
SFPD OP 1
VDD OP 2
CS
SCLK
SI
SO
RESET
OP 3
OP 4
OP 5
OP 6
OP 7
GND
V PWR
Figure 1. 33291L Simplified Application Schematic
Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as
may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 4. Static Electrical Characteristics
Characteristics noted under conditions 4.5 V ≤ VDD ≤ 5.5 V, 9.0 V ≤ VPWR ≤ 16 V, -40°C ≤ TA ≤ 125°C, unless otherwise noted.
Typical values noted reflect the approximate value with VBAT = 13 V, TA = 25°C.
Characteristic
Symbol
Min
Typ
Max Unit
POWER INPUT
Supply Voltage Range
Quasi-Functional (14)
Fully Operational
Supply Current (All Outputs ON, IOUT = 0.5 A)
Sleep State Supply Current at RST ≤ 0.2 VDD and/or VDD < 0.5 V
Sleep State Output Leakage Current (Per Output, RST = 0 V)
Overvoltage Shutdown
Overvoltage Shutdown Hysteresis (15)
Logic Supply Voltage
Logic Supply Current (16)
RST ≥ 0.7 VDD
RST ≤ 0.5 V
Logic Supply Undervoltage Lockout Threshold (17)
POWER OUTPUT
Drain-to-Source ON Resistance (IOUT = 0.5 A, TJ - 25°C)
VPWR = 5.5 V
VPWR = 9.0 V
VPWR = 13 V
Drain-to-Source ON Resistance (IOUT = 0.5 A, TJ - 150°C)
VPWR = 5.5 V
VPWR = 9.0 V
VPWR = 13 V
Output Self-Limiting Current
Outputs Programmed ON, VOUT = 0.6 VDD
Output Fault Detect Threshold (18)
Output Programmed OFF
Output OFF Open Load Detect Current (19)
Output Programmed OFF, VOUT = 0.6 VDD
VPWR(QF)
VPWR(FO)
VPWR(ON)
IPWR(ON)
IPWR(SS)
VOV
VOV(HYS)
VDD
IDD
VDD(UVLO)
5.5
9.0
–
–
–
28
0.2
4.5
–
–
2.5
RDS(ON)
RDS(ON)
IOUT(LIM)
VOUTth(F)
IOCO
–
–
–
–
–
–
1.0
2.5
30
V
– 9.0
– 26.5
1.0 2.0 mA
1.0 2.5 µA
1.0 2.5 µA
32 36 V
0.8 1.5 V
– 5.5 V
1.0 4.0 mA
– 25 µA
– 3.5 V
Ω
– 2.0
0.6 1.2
0.55 1.0
Ω
– 3.0
1.2 1.6
1.0 1.2
A
2.0 3.0
V
3.0 3.5
µA
50 100
33291L
6
Analog Integrated Circuit Device Data
Freescale Semiconductor
6 Page FUNCTIONAL DESCRIPTION
INTRODUCTION
SCLK
Parallel Port
MC68XX
Microcontroller
SPI
MISO
IRQ
CS SCLK
SO SI
33291
MOSI
8 Outputs
CS SCLK
SO SI
33291
8 Outputs
CS SCLK
SO SI
33291
8 Outputs
CS SCLK
SO SI
33291
8 Outputs
Figure 13. 33291L SPI System Daisy Chain
Multiple 33291L devices can also be controlled in a
parallel input fashion using SPI, illustrated in Figure 14. This
figure shows a possible 24 loads being controlled by only
three dedicated parallel MCU ports used for chip select.
master; however, not at the same time. Only when the master
is not communicating can a slave assume the mastership and
communicate. MCU master control is switched through the
use of the slave select (SS) pin of the MCUs. A master will
become a slave when it detects a logic low state on its SS pin.
MOSI
SCLK
33291
SI
SCLK
8 Outputs
These basic examples make the 33291L very attractive for
applications where a large number of loads require efficient
control. To this end, the popular Synchronous Serial
Peripheral Interface (SPI) protocol is incorporated to
communicate efficiently with the MCU.
MC68XX
Microcontroller
SPI
Parallel
Ports
A0
A1
A2
CS
33291
SI
SCLK
CS
8 Outputs
SPI SYSTEM ATTRIBUTES
The SPI system is flexible enough to communicate directly
with numerous standard peripherals and MCUs available
from Motorola and other semiconductor manufacturers. SPI
reduces the number of pins necessary for input/output (I/O)
on the 33291L. It also offers an easy means of expanding the
I/O function using few MCU pins. The SPI system of
communication consists of the MCU transmitting, in return it
receives one data-bit of information per system clock cycle.
33291
SI
SCLK
CS
8 Outputs
Data bits of information are simultaneously transmitted by
one pin, Master Out Serial In (MOSI), and received by
another pin, Master In Serial Out (MISO), of the MCU.
Some features of SPI are as follows:
• Full duplex, three-wire synchronous data transfer
Figure 14. Parallel Input SPI Control
Figure 15, page 13, illustrates a basic method of
controlling multiple 33291L devices using two MCUs. A
system can have only one master MCU at any given instant
of time and one or more slave MCUs. Master control of the
system must pass from one MCU to the other in an orderly
manner. The master MCU supplies the system clock signal
(top MCU designated the master); the lower MCU being the
slave. It is possible to have a system with more than one
• Each microcontroller can be a master or a slave
• Provides write collision flag protection
• Provides end of message interrupt flag
• Four I/Os associated with SPI (MOSI, MISO, SCLK, SS)
Drawbacks to SPI are as follows:
• An MCU is required for efficient operational control
• In contrast to parallel input control it is slower at performing
pulse width modulating (PWM) functions.
33291L
12
Analog Integrated Circuit Device Data
Freescale Semiconductor
12 Page | ||
Seiten | Gesamt 25 Seiten | |
PDF Download | [ 33291L Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
33291 | Eight-Output Switch | Freescale Semiconductor |
33291L | Eight-Output Switch | Freescale Semiconductor |
Teilenummer | Beschreibung | Hersteller |
CD40175BC | Hex D-Type Flip-Flop / Quad D-Type Flip-Flop. |
Fairchild Semiconductor |
KTD1146 | EPITAXIAL PLANAR NPN TRANSISTOR. |
KEC |
www.Datenblatt-PDF.com | 2020 | Kontakt | Suche |