STCC05-B
HOME APPLIANCE CONTROL CIRCUIT
APPLICATIONS
Home Appliance digital control AC Power drive and functional safety management Air Conditioner, Refrigerator and Oven applications Compressor, fan, heater and valve drive circuit
FEATURES Wide range input supply voltage operation: 7 to 18V 5 V +/- 5% full tolerance voltage regulator and 50mA output current DIP-20 MCU reset circuit with activation delay time and hysteresis (3.75V Hi, 3.4V Lo) Table 1. Order Code 30s digitally filtered inverting Zero Voltage Synchronization Part Number Marking Three 50mA relay coil drivers with demagnetizSTCC05-BD4 STCC05-B ing diode One 150mA relay coil driver with demagnetizing diode for a 20A relay One 30mA peak enhanced buzzer driver with enable pin and soft turn off 12 to 5V robust non inverting level shifter for speed sensor or door switch interface Ambient temperature: - 20 to 85C BENEFITS Higher module compactness with reduced component count Drastic reduction of soldered pins on the board for lower use of lead metal Faster module assembly time High transient burst immunity and ESD robustness compliant with IEC61000-4 standards Enhanced functional reliability Enhanced circuit parametric quality Easy to design for short time to market Figure 1: STCC05 based Air Conditioner application diagram
VPS COMPRESSOR RELAY
RL 4
STCC05
V PS
I N4
20A RELAY DRIVER
P04
I N3
RL3
V PS
RELAY DRIVER
P03
I N2
POWER RELAYS
RL2
V PS
RELAY DRIVER
P02
I N1
RL1
V PS
RELAY DRIVER
P01
ENBZ
BZ2
V PS BUZZER DRIVER
P06
RS
BUZZER
BZ1
INBZ
VDD
PWM
VPS
SMPS
V PS
VPS 5V REGULATOR
V DD
VDD
RST \
VSS
CDD
COM
RESET
SYN
ZERO VOLTS SYNC. 30s FILTER
ZVS
/RS T NMI
VPS
INS
LEVEL SHIFTER EMI FILTER
OUT S
P07
MCU
RINS AC Line VPS
JP
CUP
SPEED SENSOR
October 2004
REV. 1
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STCC05-B
Figure 2. Block diagram
VPS
Figure 3. Pin-out connections
RL4
VPS
20A RELAY DRIVER
IN4
VPS SYN INS RL1 RL2 RL3 RL4 BZ1
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VDD /RST ZVS OUTS IN1 IN2 IN3 IN4 INBZ COM
RL3
VPS
RELAY DRIVER
IN3
RL2
VPS
RELAY DRIVER
IN2
RL1
RELAY DRIVER VPS
IN1
BZ2
BUZZER DRIVER
ENBZ
BZ1
VPS
INBZ
VPS
5V REGULATOR
VDD
COM
RESET ZERO VOLTS SYNC.
RST\
BZ2
ZVS
SYN
30s FILTER LEVEL SHIFTER
ENBZ
OUTS
INS
EMI FILTER
FUNCTIONAL DESCRIPTION The STCC05 is a control circuit embedding most of the analog & power circuitry of an air conditioner or refrigirator control module. It interfaces the micro-controller MCU with the AC power and cooling process sections. The voltage supply The 5V voltage regulator supplies the micro-controller MCU. Its input voltage ranges from 7V to 18V; and its average DC output current up to 50mA. With an output filtering capacitor of 100F, its output voltage accuracy is better than +/- 5% in the whole operating range of the ambient temperature TAMB, the load current IDD and the input voltage VPS , contributing directly to the ADC accuracy. The regulator includes also an over current limiter and a thermal shutdown. The over current limiter protects the regulator against output short circuits and inrush currents during the power up. The current limiter is made of a serial shunt resistance as current sensor and a circuit that regulates the input current. Moreover, the thermal shutdown protects the whole circuit against overload operations. It is made of a thermal sensing junction and a hysteresis comparator that is able to switch off the passing element.
RSENSE VPS
VDD MCU
Thermal Shutdown
Over current Limiter
VDD
VDD
VDD
1.25 V Reference
VL
6k
/RST
R UP > 100k
VH
RESET 3k V H = 3.75 V V L = 3.40 V
R1
R2
CUP = 100nF
VDD
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STCC05-B
The reset circuit This circuit ensures a Low Voltage Detection (LVD) of the output of the regulator. Most micro-controllers have an active RESET pin in the low state: so, the /RST pin will be active at low state. The reset comparator senses the regulator voltage VDD. The /RST pin goes high when VDD is higher than the high threshold VH = 3.75V and after a delay time TUP; and is low when the VDD decreases below the low threshold VL = 3.4V after the delay time TDW. These delays are set by an external capacitor CUP connected to the /RST pin and depend on the trigger thresholds of /RST: For CUP = 100nF, TUP= 400s with VTH= VH/2; TDW= 200s with VTH= VL/2. The Zero Voltage Synchronization ZVS circuit The Zero Voltage Synchronization ZVS circuit generates the signal ZVS that synchronizes the whole operation with the AC line cycle (20 ms on 50 Hz or 16.7 ms on 60 Hz). This signal allows the MCU to control the AC loads and achieve the timing functions. The input pin SYN is an image of the mains voltage. It is connected to either the power supply transformer through a resistor RZV or an opto-coupler that is controlled directly by the AC line voltage. The circuit is protected against fast line transient voltages: a robust ESD protection and a 30s digital filter are implemented to provide a higher immunity to the MCU operation. Its output signal ZVS is inverted respect to the input signal VSYN.
VDD
30 s FILTER
2 5 k
S1 Q
SYN
7 0 k 3 0 k COM
S2
ZVS
The relay coil drivers These robust circuits allow a DC relay coil to be driven by an MCU output. The relay coil has a minimum resistance of 580 and has a power up to 0.25W for VPS = 12 V. These characteristics are representative of 3A relays such as FTR-F3AA-12V or JQ1A-12V series. The output stage is made of a transistor and a demagnetization diode. The transistor is referred to the ground COM, has a DC current rating of 50mA; and its collector is connected to the output RLI (I=1, 2, 3). The diode is connected between the output pin RLI and the supply pin VPS. Moreover, a fourth coil driver has an extended 150mA current capability to be able to drive the coil of a relay having a 130 minimum resistance and a 1.1W maximum power. These characteristics are representative of 20A relays such as G4A-E-DC12, OMIF-S-112 or UKH12S series.
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STCC05-B
VPS
VPS
Demagnetizing Diode 4 k
VIN
RL I
10 k
ROH = 1k ENBZ RBZ= 1k
VIN
INI
10 k
Relay Transistor
BZ 2 BZ 1
INBZ
The buzzer driver with enable control The MCU can excite a warning buzzer with a 50% PWM signal. The buzzer driver amplifies this signal in current and translates it from the 5V MCU output to the VPS supply to produce the right sound level from the buzzer. The output stage is made of a NPN transistor, a PNP transistor and two 1k resistors. The NPN transistor, referred to the power ground COM, is controlled by the input INBZ; its collector is connected to the output BZ1. The input INBZ is driven by a simple push-pull MCU buffer. The PNP transistor, referred to the VPS polarity, is controlled by the input ENBZ; and its collector is connected to the output BZ2 through a 1k resistor. The input ENBZ is driven by a simple push-pull MCU buffer. The pin BZ2 is the supply terminal of the buzzer; and the circuit has a DC current rating of 9mA and the PWM section runs from 10Hz up to 5kHz. A 1k resistor RBZ is connected between the BZ1 and BZ2 pins to discharge the buzzer periodically. Moreover, the addition of an external capacitor-resistor network on BZ2 pin will allow the buzzer to turn on and off smoothly when the pin ENBZ is toggling.
The speed sensor level shifter The OUTS signal is generated by an electronic signal such as the indoor fan speed clock issued of a Hall Effect sensor or a door switch signal and is transmitted to the MCU. As the INS input may be disturbed; a spike suppressor and a simple EMI filter are added to increase the input robustness. The output signal OUTS is not inverted with respect to the input signal INS.
VDD VDD
50 k
EMI Filter
OUT S
500
IN S
50 k
50 k
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STCC05-B
Table 2: Absolute Ratings (limiting values) Symbol V DD VPS VSYN VMO VI VO Pin V DD VPS, INS SYN BZ1, BZ2, RLx, x = 1 to 4 IN1, IN2, IN3 ZVS, OUTS, /RST VPS RLx, x = 1 to 3 IM RL4 RLx, x = 1 to 4 BZ1, BZ2 BZ1, BZ2 RLx, l = 1 to 4 All AII All Parameter name & conditions Output supply voltage Power supply voltage, level shifter input ZVS input voltage, RZV = 15k Output voltage Input logic voltage Output logic voltage Maximum sourced current pulse, tp = 10ms Maximum sunk driver current pulse, tp = 10ms Maximum DC sunk current Maximum sunk driver current pulse, tp = 10ms Maximum DC sunk current Maximum diver diode reverse current Average output current Peak output current, tp = 50s Maximum DC sunk current in all relay drivers VPS = 16V, TAMB= 70C, IDD= 50mA, DIP-20 Maximum DC sunk current in all relay drivers VPS = 16V, TAMB= 85C, IDD= 25mA, DIP-20 Maximum dissipation, DIP-20, TAMB= 70C Operating ambient temperature Operating junction temperature Storage junction temperature Value - 0.3 to 6 - 0.3 to 20 - 1 to 20 - 0.3 to VPS + 0.3 - 0.3 to VDD + 0.3 - 0.3 to VDD + 0.3 500 60 50 160 150 1 2 50 220 mA 300 0.90 - 20 to 85 - 10 to 150 - 25 to 150 W C C C Un i t V V V V V V mA mA mA mA mA mA mA mA
IBZ AV IBZ PK IM PDIS T A MB TJ
Table 3: Electromagnetic Compatibility Ratings (TJ = 25C, according to typical application diagram of page 1, unless otherwise specified) Symbol VESD VESD VPPB Node All pins INS, SYN, VPS, VDD All pins Parameter name & conditions ESD protection, MIL-STD 883 method 3015, HBM model ESD protection, IEC 61000-4-2, per intput, in air (1) ESD protection, IEC 61000-4-2, per intput, in contact (1) Total peak pulse voltage Burst, IEC 61000-4-4, (2) Value 2 2 2 4 kV Un i t
Note 1: System oriented test circuit with RZV = 15k, RINS = 2.2k and CDD = CPS = 100nF Note 2: System oriented test circuit; refer to application section
Table 4: Thermal Resistance Symbol Rth(j-a) Parameter DIP-20 thermal resistance junction to ambient Single PCB with a copper thickness = 35m and surface SCU = 0.5cm2 Value 90 Unit C/W
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STCC05-B
Table 5: Electrical Characteristics (TJ = 25C, VCC = 12V, unless otherwise specified) Symbol Pin Na m e Co n d i t i o n s Min. Typ
Voltage supply IDD = 5 to 40mA Tamb = 0 to 70C VPS = 9 to 16V CDD = 100F VIN1 to 4 = 0V VDD = 5V, IDD = 0 (open) VDD = 0V Output in short circuit
Max.
Un i t
VDD
VDD
Output voltage supply
4.75
5
5.25
V
VPS IS Q IIN_SC T O FF T VH VL VHYS TUP
VPS VPS VPS VDD V
Input supply voltage Quiescent supply current Limiting input current
7 1.3 50 80 170 15 3.4 3.1 3.75 3 .4 0.35 400 200 30 1 .1 0.3 0 .9
18 2 120
V mA mA C C
VDD
TD W TD VTH ISYN VOH VOL IIN4 VON IINx VON VRL H VINx VINBZ F B UZ ROH VON V E NB Z RBZ VINS H V INS L II N S
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CUP = 100nF, VTH = VL/2, 100 RUP = 100k Zero Voltage synchronization circuit ZVS Transition filtering time Rising and falling step 10 SYN Transition threshold 0.6 VSYN = 5V SYN Input nominal current VSYN = 18V Level shifter, zero voltage synchronization, reset circuits LVOUT High level output voltage 0.8 VDD /RST ZVS Low level output voltage Enabling reset delay time IN4 RL4 IN1 to 3 RL1 to 3 RL1 to 4 IN1 to 4 INBZ BZ2 BZ1 ENBZ Input activating current On state output voltage Input activating current On state output voltage Off state output voltage 0.9 VPS Transition threshold 0.8 Buzzer driver with enable control Input muting voltage 0 .8 Buzzer PWM frequency Duty cycle = 50% 0.01 On state output resistance VINBZ = 0V, VENBZ > 3.1V, IBZ2 = 5mA On state output voltage ION = 25mA, VINBZ > 3.1V, VENBZ = 0V, tp = 50s Enable threshold voltage 0.8 BZ1 - BZ2 Buzzer resistance Relay coil drivers VIN4 = 5V ION = 150mA, VIN4 > 3.1V VINx = 5V ION = 50mA, VINx > 3.1V VINx < 50.8V, RL = 580
/RST
Shutdown temperature Releasing thermal hysteresis Reset circuit Disabling reset threshold Enabling reset threshold Threshold hysteresis CUP = 100nF, VTH = VH/2, Disabling reset delay time RUP = 100k
4 3.6
V
200
800 s 400 70 1.4 1.5 s V mA V 0.2 VDD V mA V mA V V V V kHz k 1.4 3.1 V V k V V A
0.85 1 0.85 1 1 .9 1.5 1 1 2 1
1.4 1.2 1.4 1.2 VPS 3.1 3.1 5
Speed sensor level shifter
INS High level detection Low level detection Internal input current 7 VINS = 12V 500 18 0.8 800
STCC05-B
DC CHARACTERISTICS Figure 4: Typical regulator voltage VDD variation versus its output current IDD at TJ = 25C
5.2 5.1 5 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4
0 20 40 60 80 100
Vin = 9V Vin = 16V
Figure 5: Typical regulator voltage VDD variation versus its junction temperature at VIN = 12V
Vdd (V)
5.05 Vdd (V) 5.025 5 4.975 4.95
Idd = 5mA
4.925
Idd (mA)
Idd = 40mA
Tj(C) 50 75 100 125 150
4.9 -25 0 25
Figure 6: Typical relay driver RL (1 to 3) onstate voltage variation versus its current
1.1 Von (V) 1 0.9 0.8 0.7
Tj = -25C
Figure 7: Typical compressor relay driver RL4 onstate voltage variation versus its current
1.1 Von (V) 1 0.9 0.8 0.7
0.6 0.5 0
Tj = 25C Tj = 85C
Tj = -25C
0.6
Ion (mA)
Tj = 25C Tj = 85C
Ion (mA) 100 150
0.5
10 20 30 40 50
0
50
AIR CONDITIONER APPLICATION CONSIDERATIONS
IMMUNITY IMPROVEMENT OF STCC05 AND THE MICROCONTROLLER Some basic rules can be applied to improve the STCC05 immunity in its application:
- The power ground of VPS should be split from the signal ground of VDD, - The STCC05 is placed as close as possible of the MCU, - The supply capacitors would increase the system immunity by being placed closed to the blocks they feed, or putting decoupling capacitors (f.i. CDD = CPS = 100nF) - Large supply wire on the PCB should be avoided to reduce sensitivity to radiated interferences. - A decoupling capacitor can be put on the pin INS of the speed sensor interface and the MCU reset pin (f.i. CINS = 10nF; CUP = 100nF).
(1) (2) (3)
(4)
Depending of the PCB layout quality, others capacitors may be put on sensitive pins such as the output regulator pin VDD and the zero crossing synchronization input pin SYN.
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STCC05-B
Figure 8: Example of PCB layout improvement for higher immunity
2
VPS
VPS 5VREG
VDD
VDD
3
Reset RST\
3
RST\
4
SMPS
MCU
STCC05
VSS
COM
1
1
STCC05 ELECTROMAGNETIC COMPATIBILITY Standards such as IEC61000-4-x evaluate the electromagnetic compatibility of appliance systems. To test the immunity level of the STCC05 to the IEC61000-4-4 (Electrical Fast Transient Bursts), a board representative of usual application control unit should be considered by applying the immunity design rules defined in the previous paragraph. IEC61000-4-4 test does not allow any measurement equipment to be connected to the tested system, as it would corrupt the test results. That is why this board should include a remote monitoring circuit based on optic fibers. Thus, without any electrical link with an oscilloscope, it is possible to monitor the VDD voltage as well as the /RST or the ZVS outputs of the STCC05, during the IEC61000-4-4 test. This optical link detects parasitic commutations of outputs as short as 60ns. With this board, and the burst generator coupled to the mains as specified in the IEC61000-4-4 standard (see the following principle diagram), the STCC05 has been tested successfully at 4kV.
Figure 9: IEC61000-4-4 Electrical Fast Transient Burst general STCC05 test circuit
Figure 10: Test circuit schematic
MAINS TR1 15V 5VA VPS VDD
Rzv 15k D1~D4 1N4002
Cps_1 100uF
Cps_2 100nF 1 2
U1 STCC05-B Vps SYN INs RL1 RL2 RL3 RL4 BZ1 BZ2 ENbz VDD RST ZVS OUTs IN1 IN2 IN3 IN4 INBZ COM 20 19 18 17 16 15 14 13 12 11
Cdd_1 100uF
Cdd_2 100nF RST
MAINS FILTER L
SPEED SENSOR VPS Czv 15nF
3 4
ZVS LS SW1
Cup 100nF
MAINS 0.5 kV to 4 kV tr : 5ns tp : 50 ns
PE N
5 Rins 2.2k Cins 10nF BUZZER 6 7 8 9 10 Rs 560
VDD SW2
SW3
BURST COUPLER L
SYSTEM TESTED
RELAY 1 RELAY 2 RELAY 3 COMPRESSOR RELAY
SW4
PE BURST GENERATOR N
STCC05
VPS Oscilloscope Optical Receiver
Cs 47uF BATTERY 9V5 Optical Transmitter VDD RST LS ZVS
10 cm
HFBR-0410 Optic Fiber
TEST BOARD
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STCC05-B
STCC05 POWER PERFORMANCE VERSUS ITS THERMAL CAPABILITY Figure 12: Driver current sum versus regulator current at TAMB = 70C for VPS = 12, 14, 16, 18V
IM(A)
0.35
VPS=12V VPS=12V & 14V
Figure 11: Driver current sum versus regulator current at TAMB = 85C for VPS = 12, 14, 16, 18V
IM(A)
0.35
0.3
0.3
0.25
VPS=14V
0.25
VPS=16V
0.2
0.2
TAMB =85C
0.15
VPS=18V
VPS=16V
TAMB =70C
0.15
VPS=18V
0.1
IDD(A) 0.04 0.05
0
0.01
0.02
0.03
0.1
IDD(A) 0 0.01 0.02 0.03 0.04 0.05
The main heat sources of the circuit during operation are the voltage regulator and the relay coil drivers. Depending of the power supply voltage VPS, the ambient temperature TAMB, and the thermal of resistance of the package Rth(j-a), the sum of all the coil driver currents IM is linked to the output regulator current IDD. In order to avoid spurious thermal shutdown of the system, it is advised to respect this relationship as shown on figures 7 and 8.
EXTENSION OF THE REGULATOR CURRENT CAPABILITY The output current capability of the STCC05 voltage regulator can be increased in a cost effective manner by adding an external ballast transistor and two biasing resistors. With such a circuit, the output voltage regulation remains at 5V 5%, and the current limitation is still active. Such a topology generates also power losses in the external power transistor especially when the supply voltage VPS is high or the regulator is in current limiting mode. Therefore it is advised to use a package with a suitable thermal resistance (Rth j-a). An example is proposed in the following figure doubling the regulator current capability of the solution to 100mA while producing a current limitation typically at 110mA.
Figure 13: Circuit diagram to extend the STCC05 regulator current to 100mA
Figure 14: Application diagram of the buzzer drive
VPS
27 ½W
VPS
RE
Q1
BD136
ROH = 1k
10 k
BZ 2 RBZ= 1k
VIN
R S = 560 CS= 47 F
ENBZ
20 ¼W
RB
STCC05 5V-50mA Regulator
VDD
INBZ
BZ 1
FLOATING BUZZER OPERATION The sound produced by the buzzer is controlled by the frequency of the square signal applied to the INBZ input pin. The external RS CS network connected to the BZ2 output pin produces a soft sound by smoothing the buzzer supplying envelope at power up and power down. Contrary to basic drivers, which directly apply
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STCC05-B
the voltage to the buzzer, this circuit feeds the buzzer with the exponential voltage induced by the charge and the discharge of the RS CS network. The ROH and RS resistors contribute to reduce high harmonic sound distortions. Indeed, they limit the peak current through the buzzer, feed the buzzer with the CS capacitor voltage, and limit the current through the low side NPN transistor of the driver. Therefore to set rising/falling durations of the sound shape, it is advised to adjust only the value of the CS capacitor. The integrated RBZ resistor is selected to discharge the buzzer when the low side transistor is off, especially at the maximum operating frequency. The buzzer is completely discharged within five times the time constant of the resistor-buzzer with = RBZ x CBUZZER. Therefore, RBZ < 1 / (10 x FMAX x CBUZZER). Since the buzzer capacitance CBUZZER is about 20nF at the maximum operating frequency of driver is 5kHz, this RBZ resistance is set at 1k. Figure 15: Buzzer terminal voltages VBZ1 & VBZ2 and buzzer current IBZ Figure 16: Buzzer terminal voltage VBZ2 with buzzer enable and input circuit signals
VBZ2 VBZ1 VBZ2 INBZ
IBZ
ENBZ
Time : 100s/div , VBZ1 & VBZ2 : 4V/div , IBZ : 20mA/div
Time : 100ms/div , VBZ2 , ENBZ & INBZ : 5V/div
ZERO CROSSING DETECTION CIRCUITS The detection of the zero crossing of the AC line voltage can be achieved at least on two ways with the STCC05, depending of the power supply unit. When the power supply uses a magnetic 50/60Hz transformer, the input pin SYN is connected to a transformer output through a resistor RZV, the electrical path being closed by the low side bridge diodes.
Figure 17: ZVS circuit operation using the AC secondary of a transformer
VTF
VSYN VZVS
VAC
VD D
20s FILTER 15 k
AC LINE
RZV
SYN
25 k W
S1 Q S2
ZVS
VSYN VTF
COM
100 k
V ZVS
The delay between the real Zero Crossing event and the falling edge of ZVS depends on the internal filtering time, the resistance RZV, the rectifier drop voltage VF, the VPS supply load and the temperature. The STCC05 contribution to this delay can be evaluated by measuring the delay between its input voltage VTF and its output voltage VZVS. When using VF = 0.8V, RZV = 15k, VPS = 15V, ICC = 20mA, it is about 50 s on rising voltage VTF and 115 s on falling voltage VTF. When the power supply uses a switch mode power supply, the input pin SYN is synchronized by an opto-coupler, which is connected to the mains terminals through high resistances. The isolator output is on all the time except during the zero crossing where no more current feeds the input and the output transistor switches off.
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STCC05-B
Finally, the opto-coupler could be connected directly in high side mode between the SYN and the VDD pins: the ZVS signal is then made of high level pulses synchronized with the zero crossing. However, the coupler could be connected in low side mode with an external 10k pull-up resistor to VDD: the ZVS is now inverted with low level pulses. Figure 18: ZVS circuit operation with an opto-coupler
V AC V AC
IOPTO VSYN VSYN
IOPTO
VZVS
VZVS
V DD V DD
V DD V DD
RU P
VAC
SYN
20s FILTER 25 k
S1 Q S2
ZVS
10 k
20s FILTER SYN 25 k
S1 Q
ZVS
V SYN
COM
100 k
VAC V ZVS
S2
V SYN
COM
100 k
V ZVS
Figure 19: Ordering Information Scheme
STCC
Circuit configuration and related application 05 = Air conditioner control Typical power supply voltage B = 12V Package D4 = DIP-20
X
-
B
Z
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STCC05-B
Figure 20: DIP-20 Package Mechanical Data DIMENSIONS REF.
I
Millimetres Min. Typ. Max. Min. 0.020 1.65 0.055 0.45 0.25 25.4 8.5 2.54 22.86 7.1 3.93 3.3 1.34 0.508 1.39
Inches Typ. Max. 0.065 0.018 0.010 1.000 0.335 0.100 0.900 0.279 0.155 0.130 0.053
a1 B b b1 D
E
a1 b B L e F Z e3 b1
D
E e e3 F I L Z
20 1
11 10
Table 6: Ordering Information Part Number STCC05-BD4 Marking S TCC05 - B Package DIP-20 Weight 1 .4 g Base qty 20 Delivery mode Tube
Table 7: Revision History Date 05-Oct-2004 Revision 1 First issue Description of Changes
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STCC05-B
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners 2004 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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