Freescale Semiconductor
Advance Information
Document Number: MC33811
Rev. 3, 8/2008
Solenoid Monitor Integrated
Circuit (IC)
The 33811 is a 5 channel Solenoid Monitor IC that is used to verify
proper electrical and mechanical solenoid operation. The IC contains
five solenoid driver voltage monitoring stages and a serial peripheral
interface (SPI) for fault communication and setup. The IC has the
ability to determine the correct movement of solenoid armatures by
analyzing the variation in the voltage profile, across the solenoid
driver MOSFET, which represents the actual solenoid current profile.
These features, along with cost effective packaging, make the
33811 ideal for powertrain solenoid monitoring applications.
Features
•
•
•
•
•
•
•
Typical operating voltage range, 10.5 < VPWR < 15.5 volts
Interfaces to 3.3 and 5 volt microprocessors via SPI protocol
Reset pin to initialize all 5 fault outputs
Internal voltage regulator
Internal oscillator
Unique solenoid current profile detection circuitry
Pb-free packaging designated by suffix code EG
33811
SOLENOID MONITOR
EG SUFFIX (PB_FREE)
98ASB42567B
16-PIN SOICW
ORDERING INFORMATION
Device
MCZ33811EG/R2
Temperature
Range (T
A
)
-40°C to 125°C
Package
16 SOICW
33811
V
BAT
VDD
VPWR
VDD
VSPI
SOLM1
SOLM2
SOLM3
SI
SCLK
CS
SO
RESET
SOLM4
SOLM5
MCU
MOSI
SCLK
CS
MISO
P00
D_GND
A_GND
V
BAT
SOLENOIDS
SOLENOID DRIVER
PORTS
P01
P02
P03
P04
P05
IN1
IN2
IN3
IN4
IN5
OUT1
OUT2
OUT3
OUT4
OUT5
V
BAT
V
BAT
V
BAT
V
BAT
Figure 1. 33811 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VPWR
VDD
VPWR, VDD, 5.0 V
Oscillator
and Clock Generator
D_GND
VSPI
RESET
Waveform Detection
Circuitry
SOLM1
Waveform Detection
Circuitry
SOLM2
SPI Interface
SI
15µA
15µA
CS
SCLK
V
DD
Waveform Detection
Circuitry
SOLM3
SO
Waveform Detection
Circuitry
SOLM4
A_GND
Waveform Detection
Circuitry
SOLM5
Figure 2. 33811 Simplified Internal Block Diagram
33811
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
PIN CONNECTIONS
VDD
D_GND
SO
SI
CS
SCLK
RESET
VSPI
1
2
3
4
5
6
7
8
16
15
14
13
A_GND
N/C
SOLM1
SOLM2
SOLM3
SOLM4
SOLM5
VPWR
12
11
10
9
Figure 3. 33811 Pin Connections
Table 1. 33811 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on
page 11.
Pin Number
1
2
3
Pin Name
VDD
D_GND
SO
Pin Function
Power
Ground
Output
Formal Name
Digital Voltage Supply
Digital Ground
Serial Output Data
Definition
The VDD pin is the digital logic supply voltage used internally in the IC.
Digital ground for the internal control circuits of the IC. This ground should
be used for decoupling of the VDD supply.
The SO output pin is used to transmit serial data from the device to the
MCU. The SO pin remains tri-state until selected by the active low CS.
The serial output data is available to be latched by the MCU on the rising
edge of SCLK. The SO data transitions on falling edge of the SCLK.
The SI input pin is used to receive serial data from the MCU. The serial
input data is latched on the rising edge of SCLK, and the input data
transitions on the falling edge of SCLK.
The Chip Select input pin is an active low signal sent by the MCU to
indicate that the device is being addressed. This input requires CMOS
logic levels and has an internal active pull-up current source.
The SCLK input pin is used to clock in and out the serial data on the SI
and SO pins while being addressed by the CS. The SCLK signal consists
of a 50% duty cycle with CMOS logic levels. Input data is latched by the
device on the rising edge of SCLK while output data is changed on the
falling edge. SCLK is ignored by the device while CS is high.
The RESET pin, when pulled high, clears any fault bits and causes the
Serial Output pin to be tri-stated. The RESET pin operates at the CMOS
levels dictated by the VDD line and the state of the VSPI pin.
The VSPI pin determines the voltage levels for the SPI interface. It must
be connected to the same voltage supply (+5 volts or +3.3 Volts) as the
MCU’s SPI interface.
4
SI
Input
Serial Input Data
5
CS
Input
Chip Select
6
SCLK
Input
Serial Clock Input
7
RESET
Input
Reset Input
8
VSPI
Input
V
SPI
9
10
VPWR
SOLM5
Power
Input
Analog Voltage Supply The analog voltage supply provides the power for all the input amplifiers
and other analog circuitry in the IC.
Solenoid Monitor 5
The Solenoid Monitor Input is connected to the solenoid coil at the output
driver. It monitors the current waveform through the solenoid coil as it
appears as a voltage across the output driver MOSFET.
The Solenoid Monitor Input is connected to the solenoid coil at the output
driver. It monitors the current waveform through the solenoid coil as it
appears as a voltage across the output driver MOSFET.
11
SOLM4
Input
Solenoid Monitor 4
33811
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
PIN CONNECTIONS
Table 1. 33811 Pin Definitions (continued)
A functional description of each pin can be found in the Functional Pin Description section beginning on
page 11.
Pin Number
12
Pin Name
SOLM3
Pin Function
Input
Formal Name
Solenoid Monitor 3
Definition
The Solenoid Monitor Input is connected to the solenoid coil at the output
driver. It monitors the current waveform through the solenoid coil as it
appears as a voltage across the output driver MOSFET.
The Solenoid Monitor Input is connected to the solenoid coil at the output
driver. It monitors the current waveform through the solenoid coil as it
appears as a voltage across the output driver MOSFET.
The Solenoid Monitor Input is connected to the solenoid coil at the output
driver. It monitors the current waveform through the solenoid coil as it
appears as a voltage across the output driver MOSFET.
This pin is not to be used and must be left open in any design.
The Analog Ground is the return for the VDD and VPWR supply.
13
SOLM2
Input
Solenoid Monitor 2
14
SOLM1
Input
Solenoid Monitor 1
15
16
N/C
A_GND
No Connect
Ground
No Connect
Analog Ground
33811
4
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. Maximum Ratings
All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or
permanent damage to the device.
Ratings
ELECTRICAL RATINGS
Supply Voltage (continuous)
VPWR
VDD
VSPI
Supply Voltage (transient) on VPWR
CS,
SI, SO, SCLK, RESET
Symbol
Value
Unit
V
DC
V
PWR
V
DD
V
SPI
V
PWRMAX
–
V
INJMXMAX
–
-1.5 to 25
-0.3 to 7.0
-0.3 to 7.0
-1.5 to 50
-0.3 to V
SPI
64
3.2
V
DC
V
DC
V
DC
MHz
V
V
ESD1
V
ESD2
±2000
±200
Solenoid Monitor Inputs Maximum Voltage (5ms. maximum duration)
Frequency of SPI Operation (V
DD
= 5.0V)
(1)
ESD Voltage
(2)
Human Body Model(3)
Machine Model
THERMAL RATINGS
Peak Package Reflow Temperature During Reflow
(4), (5)
Storage Temperature
Operating Ambient Temperature
Operating Junction Temperature
Notes
T
PPRT
T
STG
T
A
T
J
Note 5
-55 to 150
-40 to 125
-40 to 150
°C
°
C
°
C
°
C
1.
2.
3.
4.
5.
This parameter is guaranteed by design but is not production tested.
ESD testing is performed in accordance with the Human Body Model (HBM) (Per AEC-Q100-002, C
ZAP
= 100pF, R
ZAP
= 1500Ω) and
the Machine Model (MM) (Per AEC-Q100-002, C
ZAP
= 200pF, R
ZAP
= 0Ω). ESD data available upon request.
All pins when tested individually.
Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow
Temperature and Moisture Sensitivity Levels (MSL), Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes
and enter the core ID to view all orderable parts. (i.e. MC33xxxD enter 33xxx), and review parametrics.
33811
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
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