Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33793/D
Rev 10, 07/2003
33793
Distributed System Interface (DSI)
Sensor Interface
The 33793 is a slave Distributed System Interface (DSI) device that is
optimized as a sensor interface. The device contains circuits to power sensors
such as accelerometers and to digitize the analog level from the sensor. The
device is controlled by commands over the DSI bus and returns measured
data over the bus.
DISTRIBUTED SYSTEM
INTERFACE (DSI) SENSOR
INTERFACE
Freescale Semiconductor, Inc...
Features
• 4-Channel, 8-Bit Analog-to-Digital Converter (ADC)
• 4 Pins Configurable as Analog or Logic Inputs or as Logic Outputs
• Provides Regulated +5.0 V Output for Sensor Power from Bus
• Additional High-Drive Logic Output
• Undervoltage Fault Detection and Signaling
• On-Board Clock (No External Elements Required)
• Field-Programmable Address
• Default and Field-Programmable as a DSI Daisy Chain Device
• Recognizes Reverse Initialization for Open Bus Fault Tolerance
• Detects Short to Battery on Bus Switch and Prevents Its Closure
D SUFFIX
16-LEAD SOICN
CASE 751B
ORDERING INFORMATION
Device
MC33793D/R2
Temperature
Range (T
J
)
-40°C to 150°C
Package
16 SOICN
33793 Simplified Application Diagram
33790
DSIO
33793
BUSRTN BUSOUT
I/O0
AGND
I/O1
AGND
I/O3
NC
I/O2
NC
BUSRTN
BUSIN
33793
BUSOUT
BUSIN
NC
H_CAP
REGOUT
NC
LOGOUT
1.0 K
1.0µF
4.7µF
To Other
DSI Slaves
Y
X
V
CC
TEST
XY
ERROR ACCELEROMETER
GND
LED
© Motorola, Inc. 2003
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H_CAP
Rectifiers
1.0
µF
Typical
BUSIN
Bus Switch
0 – 35 V Bi-Directional
Forward Receiver
Data
Response
Current
0 –11 mA
7.0 mA/µS
Received
Message
from MCU
Oscillator
4.0 MHz
DataOut <3:0>
BUSOUT
Reverse Receiver
Data
Frame
Frame
BUSRTN
Bandgap
Reference
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Bandgap
Reference
Bus Return
Logic
Command Decode
State Machine
Response Generation
4
LOGOUT
Power
Management
5.0 V Regulator
BG Reference
Bias Currents
Logic Out
High
Current
Buffer
I/O Buffers
DataOut <0>
IO0
IO1
IO2
IO3
Address A<3:0>
4 Bits NVM
REGOUT
4.7
µF
DataOut <1>
DataOut <2>
I/O0
I/O1
I/O2
I/O<3:0>
I/O3
GND
SEL
Supply Comparators
POR
ADC
8 Bits
Undervoltage
Detector
DataOut <3>
4:1
MUX
BG
Figure 1. 33793 Simplified Internal Block Diagram
33793
2
MOTOROLA ANALOG
For More Information On This Product,
INTEGRATED CIRCUIT DEVICE DATA
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Freescale Semiconductor, Inc.
BUSRTN
I/O0
AGND
I/O1
AGND
I/O3
NC
I/O2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
BUSOUT
NC
BUSIN
NC
H_CAP
REGOUT
NC
LOGOUT
PIN FUNCTION DESCRIPTION
Pin
Pin Name
BUSRTN
I/O0
AGND
I/O1
I/O3
NC
I/O2
LOGOUT
REGOUT
H_CAP
BUSIN
BUSOUT
Description
This pin provides the common return for power and signalling.
This pin can be used to provide a logic level output, a logic input, or an analog-to-digital (A/D) input.
This pin is the low reference level and power return for the analog-to-digital converter (ADC).
This pin can be used to provide a logic level output, a logic input, or an A/D input.
This pin can be used to provide a logic level output, a logic input, or an A/D input.
These pins have no internal connections.
This pin can be used to provide a logic level output, a logic input, or an A/D input.
This is a logic output with higher pull-up drive capability than the standard logic I/O.
This pin provides a regulated 5.0 V output. The power is derived from the bus.
A capacitor attached to this pin is charged by the bus during bus idle and supplies current to run the device
and for external devices via the REGOUT pin during non-idle periods.
This pin attaches to the bus and responds to initialization commands.
This pin attaches to the bus and responds to reverse initialization commands.
Freescale Semiconductor, Inc...
1
2
3, 5
4
6
7, 10, 13, 15
8
9
11
12
14
16
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
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33793
3
Freescale Semiconductor, Inc.
MAXIMUM RATINGS
All voltages are with respect to ground unless otherwise noted.
Parameter
I/O Pin Voltage
I/O Pin Current
BUSIN, BUSOUT, BUSRTN, and H_CAP Voltage
BUSIN, BUSOUT, BUSRTN, and H_CAP Current (Continuous)
Storage Temperature
Operating Junction Temperature
Lead Soldering Temperature (Note 1)
Symbol
V
IO
I
IO
V
IN
I
IN
T
STG
T
J
T
SOLDER
R
θ
JC
V
ESD1
V
ESD2
Value
-0.3 to V
REGOUT
+ 0.5
5.0
-0.3 to 40
250
-55 to 150
-40 to 150
260
150
Unit
V
mA
V
mA
°C
°C
°C
°C/W
V
±2000
±200
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Thermal Resistance Junction to Case
ESD Protection
Human Body Model (Note 2)
Machine Model (Note 3)
Notes
1. Lead soldering temperature limit is for 10 second maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
2. ESD1 performed in accordance with the Human Body Model (C
ZAP
= 100 pF, R
ZAP
= 1500
Ω).
3.
ESD2 performed in accordance with the Machine Model (C
ZAP
= 200 pF, R
ZAP
= 0
Ω).
33793
4
MOTOROLA ANALOG
For More Information On This Product,
INTEGRATED CIRCUIT DEVICE DATA
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Freescale Semiconductor, Inc.
STATIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions -0.3 V
≤
V
BUSIN
or V
BUSOUT
≤
30 V, 5.5 V < V
H_CAP
< 30 V, -40°C < T
J
< 150°C.
Parameter
Internal Quiescent Current Drain
V
H_CAP
= 25 V, Logout = 0, I/O = Input
BUSIN or BUSOUT to H_CAP Rectifier Voltage Drop
I
BUSIN
or I
BUSOUT
= 15 mA
I
BUSIN
or I
BUSOUT
= 100 mA
BUSIN + BUSOUT Bias Current
V
BUSIN
or V
BUSOUT
= 8.0 V, V
H_CAP
= 9.0 V
V
BUSIN
or V
BUSOUT
= 0.5 V, V
H_CAP
= 25 V
I
BIAS
-100
–
I
RLKG
-20
V
REG
4.75
VR
LINE
–
VR
LD
–
V
UVL
0.93
R
SW
–
I
PD
7.0
I
PU
-7.0
-11
-13
V
V
THL
V
THH
D
CL
D
CH
I
RSP
9.9
ADC
INL
ADC
FS
V
IH
V
IL
–
–
11
–
–
12.1
< 1.0
3
LSB
counts
V
RO
0.7
–
0.54
0.51
–
0.3
2.8
5.5
3.0
6.0
3.2
6.5
%
10
60
33
67
40
90
mA
11
13
µA
4.0
8.0
µA
0.95
0.97
Ω
2.3
100
V
RO
71
180
mV
5.0
5.25
mV
–
100
V
–
–
100
20
µA
V
RECT
–
–
0.75
0.9
1.00
1.2
µA
Symbol
I
Q
–
–
3.0
V
Min
Nom
Max
Units
mA
Freescale Semiconductor, Inc...
Rectifier Leakage Current
V
BUSIN
or V
BUSOUT
= 5.0 V, V
H_CAP
= 25 V
Reg0ut
5.5 V > V
H_CAP
> 25 V, I
RO
= 12 mA
RegOut Line Regulation
I
RO
= 12 mA, 5.5 V > V
H_CAP
> 25 V
RegOut Load Regulation
I
RO
= 0 to 12 mA, 5.5 V > V
H_CAP
> 25 V
Undervoltage Lockout
Proportional to unloaded V
REGOUT
Bus Switch Resistance
V
BI
= 8.0 V, I
BO
= -80 mA (Bus Switch Active)
I/O0 and I/O3 Pull-Down Current
0 < V
BUSIN
or V
BUSOUT
< 1.0 V
I/O1 and I/O2 Pull-Up Current
V
RO
< V
BUSIN
or V
BUSOUT
< V
RO
- 1.0 V
BUSIN and BUSOUT Logic Thresholds
Low
High
Logic Duty Cycle (assured by design)
Logic 0
Logic 1
BUSIN + BUSOUT Response Current
V
BUSIN
and/or V
BUSOUT
= 4.0 V
ADC Code Conversion Error (INL)
ADC Full-scale Error
I/O Logic Input Thresholds
Logic High
Logic Low
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
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33793
5
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