MOTOROLA MC33199D

Order this document by MC33199/D
The MC33199D is a serial interface circuit used in diagnostic
applications. It is the interface between the microcontroller and the special
K and L Lines of the ISO diagnostic port. The MC33199D has been
designed to meet the “Diagnosis System ISO 9141” specification.
The device has a bi–directional bus K Line driver, fully protected against
short circuits and over temperature. It also includes the L Line receiver,
used during the wake up sequence in the ISO transmission.
The MC33199 has a unique feature which allows transmission baud rate
up to 200 k baud.
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ISO 9141
SERIAL LINK DRIVER
SEMICONDUCTOR
TECHNICAL DATA
Electrically Compatible with Specification “Diagnosis System ISO 9141”
Transmission Speed Up to 200 k Baud
Internal Voltage Reference Generator for Line Comparator Thresholds
TXD, RXD and LO Pins are 5.0 V CMOS Compatible
High Current Capability of DIA Pin (K Line)
Short Circuit Protection for the K Line Input
Over Temperature Shutdown with Hysteresis
14
Large Operating Range of Driver Supply Voltage
1
Full Operating Temperature Range
ESD Protected Pins
D SUFFIX
PLASTIC PACKAGE
CASE 751A
(SO–14)
Simplified Application
REF–OUT
LO
Reference
Generator
VCC
1
14 REF–OUT
REF–IN–L
2
13 VS
REF–IN–K
3
12 L
LO
4
11 I1
RXD
5
10 Gnd
TXD
6
9 DIA
NC
7
8 NC
Protection
+
C2
–
L
I1
Source
REF–IN–L
REF–IN–K
RXD
PIN CONNECTIONS
VS
VCC
I1
VCC
C1
–
+
DIA
Thermal
Shutdown
TXD
(Top View)
Driver
Gnd
ORDERING INFORMATION
Current
Limit
This device contains 94 active transistors.
Device
Operating
Temperature Range
Package
MC33199D
TA = – 40° to +125°C
SO–14
 Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Rev 0
1
MC33199
MAXIMUM RATINGS (Note 1)
Rating
VS Supply Pin
DC Voltage Range
Transient Pulse (Note 2)
VCC Supply DC Voltage Range
Symbol
Value
VS
Vpulse
–0.5 to +40
–2.0 to +40
VCC
–0.3 to +6.0
V
–0.5 to +40
–2.0
–50
Int. Limit
V
V
mA
mA
–0.3 to
VCC + 0.3
V
V
DIA and L Pins (Note 2)
DC Voltage Range
Transient Pulse (Clamped by Internal Diode)
DC Source Current
DIA Low Level Sink Current
–
TXD DC Voltage Range
–
REF–IN DC Voltage Range
VS < VCC
VS > VCC
–
ESD Voltage Capability (Note 3)
Unit
V
–0.3 to VCC
–0.3 to VS
±2000
V(ESD)
V
NOTES: 1. The device is compatible with Specification: “Diagnosis System ISO 9141”.
2. See the test circuit (Figure 23). Transient test pulse according to ISO 76371 and DIN 40839;
highest test levels.
3. Human Body Model; C = 100 pF, R = 1500 Ω.
THERMAL RATINGS
Rating
Storage Temperature
Operating Junction Temperature
Thermal Resistance, Junction–to–Ambient
Maximum Power Dissipation (@ TA = 105°C)
Symbol
Value
Unit
Tstg
–55 to +150
°C
TJ
–40 to +150
°C
RθJA
180
°C/W
PD
250
mW
ELECTRICAL CHARACTERISTICS (– 40°C ≤ TA ≤ 125°C, 4.5 V ≤ VCC ≤ 5.5 V, 4.5 V ≤ VS ≤ 20 V, unless otherwise
noted. Typical values reflect approximate mean at 25°C, nominal VCC and VS, at time of device characterization.)
Characteristic
VCC PIN 1
VCC Supply Voltage Range
VCC Supply Current (Note 1)
Symbol
Min
Typ
Max
Unit
VCC
4.5
–
5.5
V
ICC
0.5
1.0
1.5
mA
2.0
2.0
–
–
VCC – 2.0 V
VS – 1.0 V
–5.0
–
5.0
–
–
0.34
–
0.7
0.8
RRXD
1.5
2.0
2.5
kΩ
VOL
–
0.3
0.7
V
REF–IN–L PIN 2 AND REF–IN–K PIN 3
REF–IN–L and REF–IN–K Input Voltage Range
For 0 < VS < VCC
For VCC < VS < 40 V
REF–IN–L and REF–IN–K Inputs Currents
Vinref
IVIN
V
µA
LO PIN 4
LO Open Collector Output
Low Level Voltage @ Iout = 1.0 mA
Low Level Voltage @ Iout = 4.0 mA
VOL
V
RXD PIN 5
Pull–Up Resistor to VCC
Low Level Voltage @ Iout = 1.0 mA
NOTES: 1. Measured with TXD = VCC, I1 = VS, DIA and L high, no load. REF–IN–L and REF–IN–K connected to REF–OUT.
2. 0 < VCC < 5.5 V, 0 < VS < 40 V, 0 < VDIA < 20 V, TXD high or floating.
3. When an over temperature is detected, the DIA output is forced “off”.
4. 0 < VCC < 5.5 V, 0 < VS < 40 V, 0 < VL < 20 V.
5. At static “High” or “Low” level TXD, the current source I1 delivers a current of 3.0 mA (typ). Only during “Low” to “High” transition, does this current
increase to a higher value in order to charge the K Line capacitor (CL < 4.0 nF) in a short time (see Figure 3).
6. Measured with TXD = VCC, I1 = VS, DIA and L high, no load, REF–IN–L and REF–IN–K connected to REF–OUT.
2
MOTOROLA ANALOG IC DEVICE DATA
MC33199
ELECTRICAL CHARACTERISTICS (continued) (– 40°C ≤ TA ≤ 125°C, 4.5 V ≤ VCC ≤ 5.5 V, 4.5 V ≤ VS ≤ 20 V, unless otherwise
noted. Typical values reflect approximate mean at 25°C, nominal VCC and VS, at time of device characterization.)
Characteristic
Symbol
Min
Typ
Max
Unit
High Level Input Voltage
VIH
0.7 VCC
2.8
–
V
Low Level Input Voltage
VIL
–
2.0
0.3 VCC
V
Input Current @ 0 < VS < 40 V
TXD at High Level
TXD at Low Level
IH
IL
–200
–600
–
–
30
–100
Low Level Output Voltage @ I = 30 mA
VOL
0
0.35
0.8
V
Drive Current Limit
ILim
40
–
120
mA
High Level Input Threshold Voltage
(REF–IN–K Connected to REF–OUT)
VIH
Vref min
+ 0.25 V
Vref
+ 0.325 V
Vref max
+ 0.4 V
V
Low Level Input Threshold Voltage
(REF–IN–K Connected to REF–OUT)
VIL
Vref min
– 0.2 V
Vref
– 0.125 V
Vref max
– 0.05 V
V
Input Hysteresis
VHyst
300
450
600
mV
Positive Clamp @ 5.0 mA
VCl+
37
40
44
V
Negative Clamp @ – 5.0 mA
VCl–
–1.5
–0.6
–0.3
V
Leakage Current (Note 2)
ILeak
4.0
10
16
µA
Over Temperature Shutdown (Note 3)
TLim
155
–
–
°C
High Level Input Threshold Voltage
(REF–IN–L Connected to REF–OUT)
VIH
Vref min
+ 0.25 V
Vref
+ 0.325 V
Vref max
+ 0.4 V
V
Low Level Input Threshold Voltage
(REF–IN–L Connected to REF–OUT)
VIL
Vref min
– 0.2 V
Vref
– 0.125 V
Vref max
– 0.05 V
V
Input Hysteresis
VHyst
300
450
600
mV
Leakage Current (Note 4)
ILeak
4.0
10
16
µA
Positive Clamp @ 5.0 mA
VCl+
37
40
44
V
Negative Clamp @ – 5.0 mA
VCl–
–1.5
–0.6
–0.3
V
TXD PIN 6
µA
DIA INPUT/OUTPUT PIN 9
L INPUT PIN 12
I1 PIN 11
Static Source Current
I1s
–4.0
–3.0
–2.0
mA
VI1(sat)
VS – 1.2
VS – 0.8
VS
V
I1d
–120
–80
–40
mA
VI1(dsat)
VS – 2.7
VS – 0.85
VS
V
VS Supply Voltage Range
VS
4.5
–
20
V
VS Supply Current (Note 6)
IS
0.5
1.3
2.0
mA
Static Saturation Voltage (I1s = – 2.0 mA)
Dynamic Source Current (Note 5)
Dynamic Saturation Voltage (II1(sat) = – 40 mA)
VS PIN 13
NOTES: 1. Measured with TXD = VCC, I1 = VS, DIA and L high, no load. REF–IN–L and REF–IN–K connected to REF–OUT.
2. 0 < VCC < 5.5 V, 0 < VS < 40 V, 0 < VDIA < 20 V, TXD high or floating.
3. When an over temperature is detected, the DIA output is forced “off”.
4. 0 < VCC < 5.5 V, 0 < VS < 40 V, 0 < VL < 20 V.
5. At static “High” or “Low” level TXD, the current source I1 delivers a current of 3.0 mA (typ). Only during “Low” to “High” transition, does this current
increase to a higher value in order to charge the K Line capacitor (CL < 4.0 nF) in a short time (see Figure 3).
6. Measured with TXD = VCC, I1 = VS, DIA and L high, no load, REF–IN–L and REF–IN–K connected to REF–OUT.
MOTOROLA ANALOG IC DEVICE DATA
3
MC33199
ELECTRICAL CHARACTERISTICS (continued) (– 40°C ≤ TA ≤ 125°C, 4.5 V ≤ VCC ≤ 5.5 V, 4.5 V ≤ VS ≤ 20 V, unless otherwise
noted. Typical values reflect approximate mean at 25°C, nominal VCC and VS, at time of device characterization.)
Characteristic
Symbol
Min
Typ
Max
2.7
0.5 x VS
8.5
–
–
–
3.3
0.56 x VS
10.8
Unit
REF–OUT PIN 14
Output Voltage
3.0 < VS < 5.6 V and IRO = ±10 µA
5.6 < VS < 18 V and IRO = ±10 µA
18 < VS < 40 V and IRO = ±10 µA
Vref
V
Maximum Output Current
Iout
–50
–
50
µA
Pull–Up Resistor to VCC
RPU
3.0
8.0
12
kΩ
NOTES: 1. Measured with TXD = VCC, I1 = VS, DIA and L high, no load. REF–IN–L and REF–IN–K connected to REF–OUT.
2. 0 < VCC < 5.5 V, 0 < VS < 40 V, 0 < VDIA < 20 V, TXD high or floating.
3. When an over temperature is detected, the DIA output is forced “off”.
4. 0 < VCC < 5.5 V, 0 < VS < 40 V, 0 < VL < 20 V.
5. At static “High” or “Low” level TXD, the current source I1 delivers a current of 3.0 mA (typ). Only during “Low” to “High” transition, does this current
increase to a higher value in order to charge the K Line capacitor (CL < 4.0 nF) in a short time (see Figure 3).
6. Measured with TXD = VCC, I1 = VS, DIA and L high, no load, REF–IN–L and REF–IN–K connected to REF–OUT.
DYNAMIC CHARACTERISTICS (– 40°C ≤ TA ≤ 125°C, 4.5 V ≤ VCC ≤ 5.5 V, 4.5 V ≤ VS ≤ 20 V, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Transmission Speed
1/t Bit
0
–
200 k
Baud
High or Low Bit Time
µs
t Bit
5.0
–
–
RXD Output
Low to High Transition Delay Time
High to Low Transition Delay Time
tRDR
tRDF
–
–
–
–
450
450
LO Output
Low to High Transition Delay Time
High to Low Transition Delay Time
tLDR
tLDF
–
–
–
–
2.0
2.0
DIA Output
Low to High Transition Delay Time
High to Low Transition Delay Time
tDDR
tDDF
–
–
–
–
650
650
tI1R
tI1F
–
1.5
–
–
0.3
4.5
I1 Output (VS – I1 > 2.7 V)
Rise Time
Hold Time
4
ns
µs
ns
µs
MOTOROLA ANALOG IC DEVICE DATA
MC33199
Figure 1. TXD to DIA AC Characteristic
5.0 V
+ 5.0 V +12 V
TXD Input
Signal
tBit
VCC Vbat
I1
REF–OUT
0V
REF–IN–L
REF–IN–K
Input
Signal
TXD
tDDR
Test
Point
tDDF
10 V
DIA
1.0 nF
Gnd
DIA Output
Signal
2.0 V
Figure 2. DIA to TXD and L to LO AC Characteristics
12 V
+ 5.0 V +12 V
DIA and L
Input Signal
tBit
2.0 K
VCC
Vbat
REF–OUT
REF–IN–L
REF–IN–K
TXD
LO
Test
Points
RXD
0V
L
tRDR/tLDR
Input
Signal
tRDF/tLDF
4.5 V
DIA
RXD to LO
Output Signal
Gnd
0.4 V
2 x 30 pF
Figure 3. Current Source I1 AC Characteristics
Figure 4. Current Source I1 and DIA Discharge
Current Test Schematic
tBit
5.0 V
TXD
Signal
tI1F
0V
tI1H
VCC
Vbat
REF–OUT
120 mA
Typical I1
Waveform
40 mA
4.0 mA
2.0 mA
Current Source
I1 Maximum Limit
Input
Signal
REF–IN–L
REF–IN–K
TXD
LO
RXD
tI1R
I1 Pulse
Current
+ 5.0 V +12 V
I1
DIA Discharge
Current
DIA
Gnd
33 nF To
Oscilloscope
10 Ω
Current Source
I1 Minimum Limit
At static “High” or “Low” level TXD, the current source I1 delivers a
current of 3.0 mA (typ). Only during “Low” to “High” transition, does this
current increase to a higher value in order to charge the K Line
capacitor (Cl < 4.0 nF) in a short time.
MOTOROLA ANALOG IC DEVICE DATA
5
MC33199
Figure 5. Logic Diagram and Application Schematic
Vbat
VCC = 5.0 V
REF–OUT
Reference
Generator
VS
Protection
LO
C2
L Line
L
+
–
REF–IN–L
I1
Source
REF–IN–K
RPU
TXD
I1
VCC
RXD
C1
–
+
K Line
DIA
RXD
Thermal
Shutdown
MCU
TXD
Driver
Gnd
Current
Limit
Service Tester or
End of Line
Manufacturer
Programmation or
Checking System
Car Electronic Control Unit
Figure 6. Typical Application with Several ECUs
+Vbat
RPU
L Line
MCU
K Line
MC33199
Service Tester or
End of Line
Manufacturer
Programmation or
Checking System
ECU #1
Car ISO Diagnostic
Connector
MCU
MC33199
ECU #2
Car
Other
ECUs
6
MOTOROLA ANALOG IC DEVICE DATA
MC33199
Figure 7. ICC Supply Current
versus Temperature
Figure 8. IS Supply Current
versus VS Supply Voltage
2.5
I S , SUPPLY CURRENT (mA)
I CC , SUPPLY CURRENT (mA)
1.4
1.2
1.0
0.8
0.6
0.4
– 50
– 25
0
25
50
75
100
0.5
10
15
VS, SUPPLY VOLTAGE (V)
Figure 9. IS Supply Current
versus VS Supply Voltage
Figure 10. VS Voltage
versus IS Current
20
40
25
35
–40°C
20
VS , VOLTAGE (V)
IS , SUPPLY CURRENT (mA)
125°C
1.0
TA, AMBIENT TEMPERATURE (°C)
25°C
15
10
125°C
0
5.0
10
15
20
25
30
VCC = 5.5 V
VDIA = VL = VI1 = 20 V
125°C
25°C
30
–40°C
25
20
5.0
35
15
– 5.0
40
–1.0
3.0
7.0
11
VS, SUPPLY VOLTAGE (V)
IS, CURRENT (mA)
Figure 11. REF–OUT Voltage
versus VS Supply Voltage
Figure 12. REF–OUT Voltage
versus REF–OUT Current
15
10
REF–OUT, OUTPUT VOLTAGE (V)
10
REF–OUT, OUTPUT VOLTAGE (V)
–40°C
25°C
1.5
0
5.0
125
30
8.0
6.0
4.0
2.0
0
2.0
0
5.0
10
15
20
25
VS, VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
30
35
40
VS = 18 V
8.0
6.0
4.0
VS = 6.0 V
2.0
0
– 50
– 40 – 30 – 20
–10
0
10
20
30
40
50
REF–OUT, OUTPUT CURRENT (µA)
7
MC33199
Figure 13. L and DIA Hysteresis
versus Ambient Temperature
Figure 14. L and DIA Current
versus L and DIA Voltage
12
460
440
420
– 25
0
25
50
75
–40°C
8.0
25°C
6.0
125°C
5.0
10
15
20
25
30
TA, AMBIENT TEMPERATURE (°C)
VDIA, VL, DIA AND L VOLTAGE (V)
Figure 15. DIA Saturation Voltage
versus Temperature
Figure 16. DIA Current Limit
versus Temperature
35
40
100
125
70
IDIA = 40 mA
500
450
400
350
300
– 50
10
4.0
0
125
550
– 25
0
25
50
75
100
66
62
58
54
50
– 50
125
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
TA, AMBIENT TEMPERATURE (°C)
Figure 17. RXD Pull–Up Resistor
versus Temperature
Figure 18. TXD and LO Saturation Voltage
versus Temperature
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
– 50
– 25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
8
100
I DIA , DIA CURRENT LIMIT (mA)
V DIA(sat) , DIA SATURATION VOLTAGE (mV)
400
– 50
RRXD , RXD PULL–UP RESISTOR (k Ω )
I DIA , I L, DIA AND L CURRENT (µ A)
480
100
125
V TXD(sat) , V LO(sat) , TXD AND V LO SATURATION (mV)
V Hyst , L AND DIA HYSTERESIS (mV)
500
600
500
400
LO
300
RXD
200
100
0
– 50
– 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA
MC33199
Figure 19. I1 Saturation Voltage
versus Temperature
Figure 20. I1 Output DC Current
versus Temperature
3.50
3.25
0.9
I1, DC CURRENT (mA)
V I1(sat), I1 SATURATION VOLTAGE (V)
1.0
I = 40 mA
0.8
I = 2.0 mA
0.7
3.00
2.75
2.50
0.6
0.5
–50
2.25
– 25
0
25
50
75
100
2.00
–50
125
25
50
75
100
Figure 21. I1 Output Pulse Current
versus VS Supply Voltage
Figure 22. I1 Pulse Current Width
versus Temperature
125
4.4
90
t I1 , I1 PULSE WIDTH ( µ s)
I1, OUTPUT CURRENT (mA)
0
TA, AMBIENT TEMPERATURE (°C)
100
125°C
80
25°C
70
60
– 40°C
50
40
5.0
– 25
TA, AMBIENT TEMPERATURE (°C)
7.5
10
12.5
15
17.5
4.2
4.0
3.8
3.6
3.4
–50
20
– 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (°C)
VS, SUPPLY VOLTAGE (V)
Figure 23. Transient Test Circuit Using Schaffner Generator
+12 V
D2
100 nF
Vbat
I1
D1
Schaffner
Generator
2 x 1.0 nF
L
DIA
Gnd
2 x 330 pF
Test pulses are directly applied to VS and via a capacitor of 1.0 nF to
DIA and L. The voltage VS is limited to – 2.0 V/40 V by the transient
suppressor diode D1. Pulses can occur simultaneously or separately.
MOTOROLA ANALOG IC DEVICE DATA
9
MC33199
INTRODUCTION
The MC33199 is a serial interface circuit used in
diagnostic applications. It is the interface between the
microcontroller and the special K and L Lines of the ISO
diagnostic port. The MC33199 has been designed to meet
the “Diagnosis System ISO 9141” specification.
This product description will detail the functionality of the
device (see simplified application). The power supply and
reference voltage generator will be discussed followed by the
path functions between MCU, K and L Lines. A dedicated
paragraph will discuss the special functionality of the I1 pin in
it’s ability to accommodiate high baud rate transmissions.
Power Supplies and Reference Voltage
The device requires two power supplies to be used; a
5.0 V supply, VCC, which is normally connected to the MCU
supply. The device VCC pin is capable of sinking typically
1.0 mA during normal operation. A Vbat supply voltage, VS, is
normally tied to the car’s battery voltage. The Vbat pin can
sustain up to 40 V dc. Care should be taken to provide any
additional reverse battery and transient voltage protection in
excess of 40 V.
The voltage reference generator is supplied from both VCC
and Vbat pins. The voltage reference generator provides a
reference voltage for the K and L Line comparator
thresholds. The reference voltage is dependant on the Vbat
voltage; it is linear in relation to the Vbat voltage for all Vbat
voltages between 5.6 V and 18 V. Below 5.6 V and over 18 V
the reference voltage is clamped (see Figure 11). The
REF–OUT pin connects the reference voltage out externally
making it available for other application needs. The
REF–OUT pin is capable of supplying a current of 50 µA (see
Figure 12).
Path Functions Between MCU, K and L Lines
The path function from the MCU to the K Line uses a driver
to interface directly with the MCU through the TXD pin. The
TXD pin is CMOS compatible. This driver controls the On–Off
conduction of the power transistor. When the power
transistor is On, it pulls the DIA pin low. This pin is known as
K Line in the ISO 9141 specification. The DIA pin structure is
open collector and requires an external pull–up resistor for
use. Having an open collector without an internal pull–up
resistor allows several MC33199 to be connected to the K
Line while using a single pull–up resistor for the system (see
Figure 6). In order to protect the DIA pin against short circuits
to Vbat, the MC33199 incorporates an internal current limit
(see Figure 16) and thermal shutdown circuit. The current
limit feature makes it possible for the device to drive a K Line
bus having a large parasitic capacitor value (see Special
Functionality of I1 pin below).
The path from the DIA pin, or K Line, to the MCU is done
through a comparator. The comparator threshold voltage is
connected to REF–IN–K pin. It can be tied to the REF–OUT
voltage if a Vbat dependant threshold is required in the
application. The second input of this comparator is
connected internally to DIA pin. The output of this comparator
is available at the RXD output pin and normally connects to
an MCU I/O port. RXD pin has a 2.0 kΩ internal pull–up
resistor.
10
The path from the L Line, used during a wake–up
sequence of the transmission, to the MCU is done through a
second comparator. The comparator threshold voltage is
connected to REF–IN–L pin. The REF–IN–K pin can be tied
to the REF–OUT voltage if a Vbat dependant threshold is
required in the application. The second input of this
comparator is internally connected to L pin. The output of this
comparator is available on LO output pin, which is also an
open collector structure. The LO pin is normally connected to
an MCU I/O port.
The DIA and L pins can sustain up to 40 V dc. Care should
be taken to protect these pins from reverse battery and
transient voltages exceeding 40 V.
The DIA and L pins both have internal pull–down current
sources of typically 7.5 µA (see Figure 14). The L Line
exhibits a 10 µA pull–down current. The DIA pin has the
same behavior when it is in “off” state, that is when TXD is at
logic high level.
Special Functionality of I1 Pin
The MC33199 has a unique feature which accommodates
transmission baud rates of up to 200 k baud. In practice, the
K Line can be several meters long and have a large parasitic
capacitance value. Large parasitic capacitance values will
slow down the low to high transition of the K Line and limit the
baud rate transmission. For the K Line to go from low to high
level, the parasitic capacitor must first be charged, and can
only be charged through the pull–up resistor. A low pull–up
resistor value would result in fast charge time of the capacitor
but also large output currents to be supplied causing a high
power dissipation in the driver.
To avoid this problem, the MC33199 incorporates a
dynamic current source which is temporarily activated at the
low to high transition of the TXD pin when the DIA pin or K
Line switches from a low to high level (see Figures 3 and 4).
This current source is available at the I1 pin. The I1 pin has
a typical current capability of 80 mA. It is activated for 4.0 µs
(see Figures 21 and 22) and is automatically disabled after
this time. During this time it will charge the K Line parasitic
capacitor. This extra current will quickly increase the K Line
voltage up to Vbat, resulting in a reduced rise time of the K
Line. With this feature, the MC33199 ensures baud rate
transmission of up to 200 k baud.
During high to low transitions of the K Line, the parasitic
capacitor of the line will be discharged by the output
transistor of the DIA pin. In this case, the total current may
exceed the internal current limitation of the DIA pin. If so, the
current limit circuit will activate, limiting the discharge current
to typically 60 mA (see Figures 4 and 16).
If a high baud rate is necessary, the I1 pin should be
connected to the DIA as shown in the typical application
circuit shown in Figure 5. The I1 pin can be left open, if the I1
functionality and high baud rate are not required for the
application.
MOTOROLA ANALOG IC DEVICE DATA
MC33199
PIN DESCRIPTION
Pin 1: VCC
Power Supply pin; typically 5.0 V and requiring less than
1.5 mA.
Pin 2: REF–IN–L
Input reference for C2 comparator. This input can be
connected directly to REF–OUT with or without a resistor
network or to an external reference.
Pin 3: REF–IN–K
Input reference for C1 comparator. This input can be
connected directly to REF–OUT with or without a resistor
network or to an external reference.
Pin 4: LO
Output of C2 comparator and normally connected to a
microcontroller I/O. If L input > (REF–IN–L + Hyst/2); output
LO is in high state. If L< (REF–IN–L – Hyst/2); output LO is in
low state and the output transistor is “on”. This pin is an open
collector structure and requires a pull–up resistor to be
connected to VCC. Output drive capability of this output is
5.0 mA.
Pin 5: RXD
Receive output normally connected to a microcontroller
I/O. If DIA input > (REF–IN–L + Hyst/2); output LO is in high
state. If DIA < (REF–IN–L – Hyst/2); output LO is in low state
and the output transistor is “on”. This pin has an internal
pull–up resistor (typically 2.0 kΩ) connected to VCC. Drive
capability of this output is 5.0 mA.
Pin 6: TXD
Tr a n s m i s s i o n i n p u t n o r m a l l y c o n n e c t e d t o a
microcontroller I/O. This pin controls the DIA output. If TXD is
high, the output DIA transistor is in the “off” state. If TXD is
low, the DIA output transistor is “on”.
Pin 9: DIA
Input/Output Diagnosis Bus line pin. This pin is an open
collector structure and is protected against overcurrent and
MOTOROLA ANALOG IC DEVICE DATA
circuit shorts to Vbat and VS. Whenever the open collector
transistor turns “on” (TXD low), the Bus line is pulled to
ground and the DIA pin current is internally limited to nominal
value of 60 mA. The internal power transistor incorporates a
thermal shutdown circuit which forces the DIA output “off” in
the event of an over temperature condition. The DIA pin is
also the C1 comparator input. It is protected against both
positive and negative overvoltages by an internal 40 V zener
diode. This pin exhibits a constant input current of 7.5 µA.
Pin 10: Gnd
Ground reference for the entire device.
Pin 11: I1
Bus source current pin. It is normally tied to DIA pin and to
the Bus line. The current source I1 delivers a nominal current
of 3.0 mA at static “High” or “Low” levels of TXD. Only during
“Low” to “High” transitions, does this current increase to
a higher value so as to charge the key line capacitor
(Cl < 4.0 nF) in a short time (see Figures 3 and 4).
Pin 12: L
Input for C2 comparator. This pin is protected against both
positive and negative overvoltage by a 40 V zener diode. This
L Line is a second independent input. It can be used for wake
up sequence in ISO diagnosis or as an additional input bus
line. This pin exhibits a constant input current of 7.5 µA.
Pin 13: VS
12 V typical, or Vbat supply pin for the device. This pin is
protected against overvoltage transients.
Pin 14: REF–OUT
Internal reference voltage generator output pin. Its value
depends on VS (Vbat) values. This output can be directly
connected to REF–IN–L and REF–IN–K, or through a
resistor network. Maximum current capability is 50 µA.
11
MC33199
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751A–03
(SO–14)
ISSUE F
–A–
14
8
–B–
1
P 7 PL
0.25 (0.010)
7
G
M
M
K
M
T B
S
M
F
–T–
D 14 PL
0.25 (0.010)
B
R X 45 _
C
SEATING
PLANE
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
A
S
J
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
8.55
8.75
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.337
0.344
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.228
0.244
0.010
0.019
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12
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MOTOROLA ANALOG IC DEVICE DATA
*MC33199/D*
MC33199/D