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Automotive ISO 9141 Serial Link Driver
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.
MC33199
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 Large Operating Range of Driver Supply Voltage Full Operating Temperature Range ESD Protected Pins
D SUFFIX PLASTIC PACKAGE CASE 751A (SO-14)
14 1
Simplified Application
VCC VS
PIN CONNECTIONS
REF-OUT LO
Reference Generator + C2 -
Protection L
VCC REF-IN-L REF-IN-K LO
1 2 3 4 5 6 7
14 REF-OUT 13 VS 12 L 11 I1 10 Gnd 9 DIA 8 NC
REF-IN-L REF-IN-K RXD VCC C1 - +
I1 Source I1
RXD TXD NC DIA
Thermal Shutdown TXD Driver Gnd Current Limit Device This device contains 94 active transistors. MC33199D
(Top View)
ORDERING INFORMATION
Operating Temperature Range TA = - 40 to +125C Package SO-14
Rev 0
(c) Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
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MC33199
MAXIMUM RATINGS (Note 1)
Rating VS Supply Pin DC Voltage Range Transient Pulse (Note 2) VCC Supply DC Voltage Range 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) Symbol VS Vpulse VCC - -0.5 to +40 -2.0 -50 Int. Limit - - -0.3 to VCC -0.3 to VS V(ESD) 2000 V -0.3 to VCC + 0.3 V V mA mA V V Value -0.5 to +40 -2.0 to +40 -0.3 to +6.0 V Unit 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 .
THERMAL RATINGS
Rating Storage Temperature Operating Junction Temperature Thermal Resistance, Junction-to-Ambient Maximum Power Dissipation (@ TA = 105C) Symbol Tstg TJ RJA PD Value -55 to +150 -40 to +150 180 250 Unit C C C/W mW
ELECTRICAL CHARACTERISTICS (- 40C TA 125C, 4.5 V VCC 5.5 V, 4.5 V VS 20 V, unless otherwise
noted. Typical values reflect approximate mean at 25C, nominal VCC and VS, at time of device characterization.) Characteristic VCC PIN 1 VCC Supply Voltage Range VCC Supply Current (Note 1) 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 LO PIN 4 LO Open Collector Output Low Level Voltage @ Iout = 1.0 mA Low Level Voltage @ Iout = 4.0 mA RXD PIN 5 Pull-Up Resistor to VCC Low Level Voltage @ Iout = 1.0 mA RRXD VOL 1.5 - 2.0 0.3 2.5 0.7 k V VOL - - 0.34 - 0.7 0.8 V Vinref 2.0 2.0 IVIN -5.0 - - - VCC - 2.0 V VS - 1.0 V 5.0 A V Symbol Min Typ Max Unit
VCC ICC
4.5 0.5
- 1.0
5.5 1.5
V 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) (- 40C TA 125C, 4.5 V VCC 5.5 V, 4.5 V VS 20 V, unless otherwise
noted. Typical values reflect approximate mean at 25C, nominal VCC and VS, at time of device characterization.) Characteristic TXD PIN 6 High Level Input Voltage Low Level Input Voltage Input Current @ 0 < VS < 40 V TXD at High Level TXD at Low Level DIA INPUT/OUTPUT PIN 9 Low Level Output Voltage @ I = 30 mA Drive Current Limit High Level Input Threshold Voltage (REF-IN-K Connected to REF-OUT) Low Level Input Threshold Voltage (REF-IN-K Connected to REF-OUT) Input Hysteresis Positive Clamp @ 5.0 mA Negative Clamp @ - 5.0 mA Leakage Current (Note 2) Over Temperature Shutdown (Note 3) L INPUT PIN 12 High Level Input Threshold Voltage (REF-IN-L Connected to REF-OUT) Low Level Input Threshold Voltage (REF-IN-L Connected to REF-OUT) Input Hysteresis Leakage Current (Note 4) Positive Clamp @ 5.0 mA Negative Clamp @ - 5.0 mA I1 PIN 11 Static Source Current Static Saturation Voltage (I1s = - 2.0 mA) Dynamic Source Current (Note 5) Dynamic Saturation Voltage (II1(sat) = - 40 mA) VS PIN 13 VS Supply Voltage Range VS Supply Current (Note 6) VS IS 4.5 0.5 - 1.3 20 2.0 V mA I1s VI1(sat) I1d VI1(dsat) -4.0 VS - 1.2 -120 VS - 2.7 -3.0 VS - 0.8 -80 VS - 0.85 -2.0 VS -40 VS mA V mA V VIH VIL VHyst ILeak VCl+ VCl- Vref min + 0.25 V Vref min - 0.2 V 300 4.0 37 -1.5 Vref + 0.325 V Vref - 0.125 V 450 10 40 -0.6 Vref max + 0.4 V Vref max - 0.05 V 600 16 44 -0.3 V V mV A V V VOL ILim VIH VIL VHyst VCl+ VCl- ILeak TLim 0 40 Vref min + 0.25 V Vref min - 0.2 V 300 37 -1.5 4.0 155 0.35 - Vref + 0.325 V Vref - 0.125 V 450 40 -0.6 10 - 0.8 120 Vref max + 0.4 V Vref max - 0.05 V 600 44 -0.3 16 - V mA V V mV V V A C VIH VIL IH IL 0.7 VCC - -200 -600 2.8 2.0 - - - 0.3 VCC 30 -100 V V A Symbol Min Typ Max Unit
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) (- 40C TA 125C, 4.5 V VCC 5.5 V, 4.5 V VS 20 V, unless otherwise
noted. Typical values reflect approximate mean at 25C, nominal VCC and VS, at time of device characterization.) Characteristic REF-OUT PIN 14 Output Voltage 3.0 < VS < 5.6 V and IRO = 10 A 5.6 < VS < 18 V and IRO = 10 A 18 < VS < 40 V and IRO = 10 A Maximum Output Current Pull-Up Resistor to VCC Vref 2.7 0.5 x VS 8.5 Iout RPU -50 3.0 - - - - 8.0 3.3 0.56 x VS 10.8 50 12 A k V Symbol Min Typ Max Unit
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 (- 40C TA 125C, 4.5 V VCC 5.5 V, 4.5 V VS 20 V, unless otherwise noted.)
Characteristic Transmission Speed High or Low Bit Time RXD Output Low to High Transition Delay Time High to Low Transition Delay Time LO Output Low to High Transition Delay Time High to Low Transition Delay Time DIA Output Low to High Transition Delay Time High to Low Transition Delay Time I1 Output (VS - I1 > 2.7 V) Rise Time Hold Time Symbol 1/t Bit t Bit tRDR tRDF tLDR tLDF tDDR tDDF tI1R tI1F Min 0 5.0 - - - - - - - 1.5 Typ - - - - - - - - - - Max 200 k - 450 450 s 2.0 2.0 ns 650 650 s 0.3 4.5 Unit Baud s ns
4
MOTOROLA ANALOG IC DEVICE DATA
MC33199
Figure 1. TXD to DIA AC Characteristic
5.0 V tBit VCC Vbat I1 REF-OUT REF-IN-L REF-IN-K Input Signal TXD DIA 1.0 nF Gnd Test Point 0V tDDR 10 V DIA Output Signal tDDF TXD Input Signal
+ 5.0 V +12 V
2.0 V
Figure 2. DIA to TXD and L to LO AC Characteristics
+ 5.0 V +12 V
12 V tBit DIA and L Input Signal
2.0 K
VCC Vbat REF-OUT REF-IN-L REF-IN-K TXD LO RXD L DIA Gnd Input Signal
0V tRDR/tLDR 4.5 V RXD to LO Output Signal tRDF/tLDF
Test Points 2 x 30 pF
0.4 V
Figure 3. Current Source I1 AC Characteristics
Figure 4. Current Source I1 and DIA Discharge Current Test Schematic
I1 Pulse Current
tBit TXD Signal tI1H 120 mA Current Source I1 Maximum Limit Input Signal 5.0 V tI1F 0V VCC Vbat REF-OUT REF-IN-L REF-IN-K TXD LO RXD tI1R Current Source I1 Minimum Limit I1 DIA Gnd + 5.0 V +12 V
40 mA 4.0 mA 2.0 mA
Typical I1 Waveform
DIA Discharge Current 33 nF To Oscilloscope 10
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 LO C2 REF-IN-L REF-IN-K RXD VCC C1 - + Thermal Shutdown TXD Driver Current Limit Gnd Service Tester or End of Line Manufacturer Programmation or Checking System DIA K Line RXD + - I1 Source Reference Generator VS
Protection L L Line
RPU I1 TXD
MCU
Car Electronic Control Unit
Figure 6. Typical Application with Several ECUs
+Vbat
RPU L Line K Line Service Tester or End of Line Manufacturer Programmation or Checking System
MCU
MC33199
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
1.4 I CC , SUPPLY CURRENT (mA) 1.2 1.0 0.8 0.6 0.4 - 50 I S , SUPPLY CURRENT (mA) 2.5 2.0 25C 1.5 125C 1.0 0.5 0 5.0 -40C
Figure 8. IS Supply Current versus VS Supply Voltage
- 25
0
25
50
75
100
125
10
15
20
TA, AMBIENT TEMPERATURE (C)
VS, SUPPLY VOLTAGE (V)
Figure 9. IS Supply Current versus VS Supply Voltage
30 IS , SUPPLY CURRENT (mA) 25 20 25C 15 10 125C 5.0 0 5.0 VS , VOLTAGE (V) -40C 40 35 30
Figure 10. VS Voltage versus IS Current
VCC = 5.5 V VDIA = VL = VI1 = 20 V 125C 25C
-40C 25 20 15 - 5.0
10
15
20
25
30
35
40
-1.0
3.0
7.0
11
15
VS, SUPPLY VOLTAGE (V)
IS, CURRENT (mA)
Figure 11. REF-OUT Voltage versus VS Supply Voltage
10 REF-OUT, OUTPUT VOLTAGE (V) 8.0 6.0 4.0 2.0 0 REF-OUT, OUTPUT VOLTAGE (V) 10
Figure 12. REF-OUT Voltage versus REF-OUT Current
VS = 18 V 8.0 6.0 4.0 VS = 6.0 V 2.0 0 - 50
0
5.0
10
15
20
25
30
35
40
- 40 - 30 - 20
-10
0
10
20
30
40
50
VS, VOLTAGE (V)
REF-OUT, OUTPUT CURRENT (A)
MOTOROLA ANALOG IC DEVICE DATA
7
MC33199
Figure 13. L and DIA Hysteresis versus Ambient Temperature
500 V Hyst , L AND DIA HYSTERESIS (mV) 480 460 440 420 400 - 50 I DIA , I L, DIA AND L CURRENT ( A) 12
Figure 14. L and DIA Current versus L and DIA Voltage
10 -40C 8.0 25C
6.0
125C
- 25
0
25
50
75
100
125
4.0 0
5.0
10
15
20
25
30
35
40
TA, AMBIENT TEMPERATURE (C)
VDIA, VL, DIA AND L VOLTAGE (V)
Figure 15. DIA Saturation Voltage versus Temperature
V DIA(sat) , DIA SATURATION VOLTAGE (mV) 550 500 450 400 350 300 - 50 I DIA , DIA CURRENT LIMIT (mA) IDIA = 40 mA 70 66 62 58 54 50 - 50
Figure 16. DIA Current Limit versus Temperature
- 25
0
25
50
75
100
125
- 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
V TXD(sat) , V LO(sat) , TXD AND V LO SATURATION (mV)
Figure 17. RXD Pull-Up Resistor versus Temperature
RRXD , RXD PULL-UP RESISTOR (k ) 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 75 100 125
Figure 18. TXD and LO Saturation Voltage versus Temperature
600 500 400 300 200 100 0 - 50
LO RXD
- 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
8
MOTOROLA ANALOG IC DEVICE DATA
MC33199
Figure 19. I1 Saturation Voltage versus Temperature
1.0 V I1(sat), I1 SATURATION VOLTAGE (V) 0.9 I = 40 mA 0.8 I = 2.0 mA 0.7 0.6 0.5 -50 3.50 3.25 I1, DC CURRENT (mA) 3.00 2.75 2.50 2.25 2.00 -50
Figure 20. I1 Output DC Current versus Temperature
- 25
0
25
50
75
100
125
- 25
0
25
50
75
100
125
TA, AMBIENT TEMPERATURE (C)
TA, AMBIENT TEMPERATURE (C)
Figure 21. I1 Output Pulse Current versus VS Supply Voltage
100 I1, OUTPUT CURRENT (mA) 90 125C 80 25C 70 60 50 40 5.0 - 40C t I1 , I1 PULSE WIDTH ( s) 4.4 4.2 4.0 3.8 3.6 3.4 -50
Figure 22. I1 Pulse Current Width versus Temperature
7.5
10
12.5
15
17.5
20
- 25
0
25
50
75
100
125
VS, SUPPLY VOLTAGE (V)
TA, AMBIENT TEMPERATURE (C)
Figure 23. Transient Test Circuit Using Schaffner Generator
+12 V 100 nF
D2 D1 Schaffner Generator 2 x 1.0 nF
Vbat
I1 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 A (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 k internal pull-up resistor. 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 A (see Figure 14). The L Line exhibits a 10 A 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 s (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.
10
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 k) 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 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 A. 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 A. 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 A.
MOTOROLA ANALOG IC DEVICE DATA
11
MC33199
OUTLINE DIMENSIONS
D SUFFIX PLASTIC PACKAGE CASE 751A-03 (SO-14) ISSUE F
-A-
14 8
-B-
1 7
P 7 PL 0.25 (0.010)
M
B
M
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.
G C
R X 45 _
F
-T-
SEATING PLANE
D 14 PL 0.25 (0.010)
K
M
M
S
J
TB
A
S
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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MOTOROLA ANALOG IC DEVICE DATA
*MC33199/D*
MC33199/D

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