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STM1061
Low Power Voltage Detector
FEATURES

FACTORY-TRIMMED VOLTAGE THRESHOLDS IN 0.1V INCREMENTS FROM 1.6V TO 5.5V 2% VOLTAGE THRESHOLD ACCURACY OPERATING VOLTAGE 0.7V to 6.0V OPEN DRAIN OUTPUT LOW SUPPLY CURRENT - 0.9A (typ) GUARANTEED OUT ASSERTION DOWN TO VCC = 0.7V POWER SUPPLY TRANSIENT IMMUNITY AVAILABLE IN SOT23-3 and SOT323-3 (SC70-3) PACKAGES OPERATING TEMPERATURE -40C TO 85C
Figure 1. Packages
SOT23-3 (WX)
SOT323-3, SC70-3 (W)(1)
Note: 1. Contact local sales office for availability.
Rev 2.0 October 2005 1/21
STM1061
TABLE OF CONTENTS
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 2. Table 1. Figure 3. Figure 4. Figure 5. Figure 6. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SOT23-3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SOT323-3 (SC70-3) Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 N-Channel Open Drain Output Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 STM1061N Active-Low, Open Drain Hardware Hookup . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PIN DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Negative-Going VCC Transients and Undershoot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 TYPICAL OPERATING CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 7. Supply Current vs. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 8. Supply Current vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 9. Output Detect Delay Time vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 10.Output Release Delay Time vs. Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 11.Maximum Transient Duration vs. Reset Threshold Overdrive. . . . . . . . . . . . . . . . . . . . . . 9 Figure 12.Detect, Release Voltage vs. Ambient Temperature for VTH- = 3.4V. . . . . . . . . . . . . . . . . 9 Figure 13.N-channel Driver Output Current vs. VDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 14.N-channel Driver Output Current vs. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 3. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 4. Operating and AC Measurement Conditions . . . . . Figure 15.AC Testing Input/Output Waveforms. . . . . . . . . . . Figure 16.Voltage Timing Waveform . . . . . . . . . . . . . . . . . . . Table 5. DC and AC Characteristics . . . . . . . . . . . . . . . . . . ...... ...... ...... ...... ....... ....... ....... ....... ...... ...... ...... ...... ...... ...... ...... ...... . . . . 12 . . . . 12 . . . . 12 . . . . 13
PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 17.SOT23-3 - 3-lead Small Outline Transistor Package Outline . . . . . . . . . . . . . . . . . Table 6. SOT23-3 - 3-lead Small Outline Transistor Package Mechanical Data . . . . . . . . . Figure 18.SOT323-3 (SC70-3) - 3-lead Small Outline Transistor Package Outline . . . . . . . . Table 7. SOT323-3 (SC70-3) - 3-lead Small Outline Transistor Package Mechanical Data . . . . 15 . . . . 15 . . . . 16 . . . . 16
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PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 8. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 9. Factory-Trimmed Thresholds with Marking Description . . . . . . . . . . . . . . . . . . . . . . . . . 18 REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 10. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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SUMMARY DESCRIPTION
The STM1061 low power voltage detector provides monitoring of battery, power-supply, and regulated system voltages. A precision voltage reference and comparator monitors the VCC input and compares it with a specified voltage threshold condition. When VCC falls below a specified trip point threshold, the output (OUT) is forced low and remains asserted as long as the VCC input remains below VTH- + hysteresis (VHYST). The STM1061 device is guaranteed to output the correct logic state for VCC down to 0.7V. They are also designed to ignore fast transients on VCC. This small, low power device is ideal for portable applications and is available in space-saving SOT23-3 and SOT323-3 (SC70-3) packages.
Figure 2. Logic Diagram
VCC
Table 1. Signal Names
OUT VCC VSS Open Drain Active-Low Output Supply Voltage Ground
STM1061
OUT
VSS
AI10477
Figure 3. SOT23-3 Connections
Figure 4. SOT323-3 (SC70-3) Connections
OUT VSS
1 2
3
VCC
AI10478
VSS OUT
1 2
3
VCC
AI10479
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Figure 5. N-Channel Open Drain Output Block Diagram
VCC
R1 + - R2 VREF
VOUT
VSS R3
AI10482
Figure 6. STM1061N Active-Low, Open Drain Hardware Hookup
DC/DC Converter VIN VSS VCC + 3.6V STM1061N (Open Drain) VCC VSS OUT MCU Suspend VSS VOUT Regulated 3V
AI10484
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PIN DESCRIPTIONS
See Figure 2., page 4 and Table 1., page 4 for a brief overview of the signals connected to this device. OUT (Open Drain). This is the Open Drain Output. It goes low when VCC drops below VTH-, and remains low as long as VCC is below VTH- + VHYST. Table 2. Pin Functions
Pin SOT23-3 1 3 2 SOT323-3 (SC70-3) 2 3 1 OUT VCC VSS Active-Low Open Drain Output Supply Voltage Ground Name Function
VCC. This is the Supply voltage and input for the Voltage Detector. VSS. Ground, VSS, is the reference for the power supply. It must be connected to the system ground.
OPERATION
Output The STM1061 Voltage Detector monitors system voltages from 1.6V to 5V in 100mV increments. The detector is designed to ignore fast transients on VCC and has a voltage hysteresis (VHYST). The STM1061 asserts an output signal (OUT) whenever VCC goes below the Voltage Detect Threshold (VTH-). The output signal (OUT) stays asserted until VCC goes above the Voltage Detect Release (VTH+). Output voltage (VOUT) is guaranteed valid down to VCC =0.7V at 25C. The STM1061has an open drain active-low output which will sink current when output is asserted. Connect a pull-up resistor from OUT to any supply voltage up to 6V (see Figure 6., page 5). Select a resistor value large enough to register a logic low, and small enough to register a logic high while all of the input current and leakage paths connected to the reset output line are being supplied. A 10k pull-up is sufficient in most applications. The advantages of open drain output is the ability to connect more open drain outputs in parallel (wired OR connections) as well as connect the output to a power supply voltage different from VCC. Negative-Going VCC Transients and Undershoot The STM1061 device is relatively immune to negative-going VCC transients (glitches). The graph (see Figure 11., page 9) indicates the maximum pulse width a negative VCC transient can have without causing a reset pulse. As the magnitude of the transient increases (further below the threshold), the maximum allowable pulse width decreases. Any combination of duration and overdrive which lies under the curve will NOT generate a reset signal. A 0.1F bypass capacitor mounted as close as possible to the VCC pin provides additional transient immunity.
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TYPICAL OPERATING CHARACTERISTICS
Figure 7. Supply Current vs. Input Voltage
1400
1200
1000
ICC (nA)
800
600 Temp = -40C Temp = 25C 200 Temp = 85C
400
0 0 1 2 3 4 5 6
AI11119b
VCC (V)
Figure 8. Supply Current vs. Ambient Temperature
1250
Supply Current: ICC (nA)
1000
750
500
VCC = 5V VCC = 3V VCC = 2V
250
0 -40
-20
0
20
40
60
80
AI11120b
Ambient Temperature (C)
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Figure 9. Output Detect Delay Time vs. Ambient Temperature
35.00
VCC-to-OUT Detect Delay: tPD (s)
30.00 VTH- = 3.4V
25.00
20.00
15.00
10.00
VTH- = 1.6V
5.00
0.00 -40
-20
0
20
40
60
80
AI11121b
Ambient Temperature: TA (C)
Figure 10. Output Release Delay Time vs. Ambient Temperature
50.00 45.00
VCC-to-OUT Release Delay: tPR (s)
40.00 VTH+ = 3.57V 35.00 30.00 25.00 20.00 15.00 VTH+ = 1.68V 10.00 5.00 0.00 -40 -20 0 20 40 60 80
AI11122b
Ambient Temperature: TA (C)
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Figure 11. Maximum Transient Duration vs. Reset Threshold Overdrive
160 140
Transient Duration (s)
120 100 80 60 40 20 0 1 10 100
VTH- = 3.4V VTH- = 1.6V
1000
10000
AI11123b
Threshold Overdrive (mV)
Note: Reset occurs above the curve.
Figure 12. Detect, Release Voltage vs. Ambient Temperature for VTH- = 3.4V
3.6
Detect, Release Voltage: VTH-, VTH+ (V)
3.5
Detect Voltage, VTH- Release Voltage, VTH+ 3.4
3.3 -40
-20
0
20
40
60
80
AI11124b
Ambient Temperature (C)
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Figure 13. N-channel Driver Output Current vs. VDS
0.06 VCC = 3.3V VCC = 3.0V
0.05
Output Current: ID (A)
0.04
VCC = 2.7V VCC = 2.1V VCC = 1.5V
0.03
VCC = 1.0V
0.02
0.01
0 0 0.25 0.5 0.75 1 1.25 1.5
AI11125b
Output Voltage: VDS (V)
Figure 14. N-channel Driver Output Current vs. Input Voltage for VDS = 0.5V
30
25
Output Current: IOUT (mA)
Temp. (25C) 20 Temp. (85C) Temp. (-40C) 15
10
5
0 0 0.5 1 1.5 2 2.5 3
AI11126b
Input Voltage: VCC (V)
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MAXIMUM RATING
Stressing the device above the rating listed in the Absolute Maximum Ratings" table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not imTable 3. Absolute Maximum Ratings
Symbol TSTG TSLD(1) VIO VCC IO PD Parameter Storage Temperature (VCC Off, VBAT Off) Lead Solder Temperature for 10 seconds Input or Output Voltage Supply Voltage Output Current Power Dissipation Value -55 to 150 260 -0.3 to VCC +0.3 0.7 to 6.0 20 320 Unit C C V V mA mW
plied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents.
Note: 1. Reflow at peak temperature of 255C to 260C for < 30 seconds (total thermal budget not to exceed 180C for between 90 to 150 seconds).
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DC AND AC PARAMETERS
This section summarizes the operating measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC characteristics Tables that follow, are derived from tests performed under the Measurement Conditions summarized in Table 4, Operating and AC Measurement Conditions. Designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters.
Table 4. Operating and AC Measurement Conditions
Parameter VCC Supply Voltage Input Rise and Fall Times Input Pulse Voltages Input and Output Timing Ref. Voltages STM1061 0.7 to 6.0 5 0.2 to 0.8VCC 0.3 to 0.7VCC Unit V ns V V
Figure 15. AC Testing Input/Output Waveforms
0.8VCC
0.7VCC 0.3VCC
AI02568
0.2VCC
Figure 16. Voltage Timing Waveform
VCC VTH+ VTH- VCC (min) VSS Release Voltage (VTH+ = VTH- + VHYST) Detect Voltage
VOUT
tPD Detect Delay VSS
tPR Release Delay
AI10483
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Table 5. DC and AC Characteristics
Sym VCC ICC Description Operating Voltage VCC = 3.0V, No Load VCC Supply Current VCC = 5.5V, No Load VCC = 1.0V Output Current, N-channel (VDS = 0.5V), Reset asserted VCC = 2.0V VCC = 3.0V VCC = 4.0V VCC = 5.0V Voltage Thresholds VTH- Detect Voltage (see Table 9., page 18 for detailed listing) Release Voltage Threshold Hysteresis VCC falling from (VTH- + 100mV) to (VTH- - 100mV) at 10mV/s VCC rising from (VTH+ - 100mV) to (VTH+ + 100mV) at 10mV/s 0.02VTH- VTH- - 2% VTH- VTH- + VHYST 0.05VTH- 0.08VTH- VTH- + 2% V 1.0 3.0 5.0 6.0 7.0 Test Condition(1) Min 0.7 0.9 1.1 1.7 14 22 26 30 Typ Max 6.0 3.0 3.6 Unit V A A mA mA mA mA mA
IOUT
VTH+ VHYST
V V
tPD
VCC to OUT Detect Delay
25
s
tPR
VCC to OUT Release Delay
30
200
s
Threshold Temperature Coefficient
Note: 1. Valid for Ambient Operating Temperature: TA = 25C.
100
ppm/ oC
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PACKAGE MECHANICAL
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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STM1061
Figure 17. SOT23-3 - 3-lead Small Outline Transistor Package Outline
E E1
B 0.15
M
CAB
A1
1
e e1 D
0.20
M
CAB A
3X
0.10 C C
A2 A
3X b C
L1 L
SOT23-3
C
Note: Drawing is not to scale.
Table 6. SOT23-3 - 3-lead Small Outline Transistor Package Mechanical Data
mm Symbol Typ A A1 A2 b C D E E1 e e1 L L1 N 0.54 0.40 0 3 0.60 8 Min 0.89 0.01 0.88 0.30 0.08 2.80 2.10 1.20 0.89 1.78 Max 1.12 0.10 1.02 0.50 0.20 3.04 2.64 1.40 1.03 2.05 0.021 0.016 0 3 0.024 8 Typ Min 0.035 0.001 0.035 0.012 0.003 0.110 0.083 0.047 0.035 0.070 Max 0.044 0.004 0.042 0.020 0.008 0.120 0.104 0.055 0.041 0.081 inches
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Figure 18. SOT323-3 (SC70-3) - 3-lead Small Outline Transistor Package Outline
E E1
B 0.30
M
CAB
A1
1
e e1 D
0.10
M
CAB A
3X
0.10 C C
A2 A
3X b 1 C
L1 L
SOT323-3
C
Note: Drawing is not to scale.
Table 7. SOT323-3 (SC70-3) - 3-lead Small Outline Transistor Package Mechanical Data
mm Symbol Typ A A1 A2 b C D E E1 e e1 L L1 1 N Min 0.80 0.00 0.80 0.25 0.10 1.80 1.80 1.15 0.65 1.30 0.35 0.10 0 8 3 0.45 0.30 30 12 Max 1.10 0.10 1.00 0.40 0.18 2.20 2.40 1.35 Typ Min 0.031 0.000 0.031 0.010 0.004 0.071 0.071 0.045 0.026 0.051 0.014 0.004 0 8 3 0.018 0.012 30 12 Max 0.043 0.004 0.039 0.016 0.007 0.087 0.094 0.053 inches
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PART NUMBERING
Table 8. Ordering Information Scheme
Example: STM1061 N xx WX 6 F
Device Type STM1061
Output Type N = Open Drain (Active-Low)
Threshold Voltage (1.6V to 5.5V, 0.1V increments) xx = See Table 9., page 18
Package WX = SOT23-3 W = SOT323-3 (SC70-3)(1)
Temperature Range 6 = -40 to 85C
Shipping Method F = ECOPACK Package, Tape & Reel
Note: 1. Contact local sales office for availability.
For other options, or for more information on any aspect of this device, please contact the ST Sales Office nearest you.
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STM1061
Table 9. Factory-Trimmed Thresholds with Marking Description
Suffix 16 17 18(1) 19(1) 20(1) 21(1) 22 23 24(1) 25(1) 26 27 28 29 30(1) 31 32(1) 33(1) 34 35(1) 36(1) 37(1) 38(1) 39(1) 40(1) 41(1) 42(1) 43(1) 44(1) 45(1) 46(1) Threshold Voltage VTH- (V) at TA = 25C Min (-2%) 1.568 1.666 1.764 1.862 1.960 2.058 2.156 2.254 2.352 2.450 2.548 2.646 2.744 2.842 2.940 3.038 3.136 3.234 3.332 3.430 3.528 3.626 3.724 3.822 3.920 4.018 4.116 4.214 4.312 4.410 4.508 Typ 1.600 1.700 1.800 1.900 2.000 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 3.100 3.200 3.300 3.400 3.500 3.600 3.700 3.800 3.900 4.000 4.100 4.200 4.300 4.400 4.500 4.600 Max (+2%) 1.632 1.734 1.836 1.938 2.040 2.142 2.244 2.346 2.448 2.550 2.652 2.754 2.856 2.958 3.060 3.162 3.264 3.366 3.468 3.570 3.672 3.774 3.876 3.978 4.080 4.182 4.284 4.386 4.488 4.590 4.692 16Nx 17Nx 18Nx 19Nx 20Nx 21Nx 22Nx 23Nx 24Nx 25Nx 26Nx 27Nx 28Nx 29Nx 30Nx 31Nx 32Nx 33Nx 34Nx 35Nx 36Nx 37Nx 38Nx 39Nx 40Nx 41Nx 42Nx 43Nx 44Nx 45Nx 46Nx Topside Marking
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Threshold Voltage VTH- (V) at TA = 25C Min (-2%) 47(1) 48(1) 49(1) 50(1) 51(1) 52(1) 53(1) 54(1) 55(1) 4.606 4.704 4.802 4.900 4.998 5.096 5.194 5.292 5.390 Typ 4.700 4.800 4.900 5.000 5.100 5.200 5.300 5.400 5.500 Max (+2%) 4.794 4.896 4.998 5.100 5.202 5.304 5.406 5.508 5.610 47Nx 48Nx 49Nx 50Nx 51Nx 52Nx 53Nx 54Nx 55Nx
Suffix
Topside Marking
Note: 1. Contact local ST sales office for availability.
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REVISION HISTORY
Table 10. Document Revision History
Date 20-January-2004 01-Aug-05 02-Sep-05 19-Oct-05 Version 1.0 1.1 1.2 2.0 First Edition Update Operation section, characteristics; insert new graphics; add ECOPACK information (Figure 7, 8, 9, 10, 11, 12, 13, 14; Table 5, 8, 9) Update characteristics, remove `push-pull output' reference (Figure 8, 9, 10, 11, 12, 16; Table 2, 4, 5, 8) Status upgrade; update characteristics; add Marking information (Figure 7, 8, 9, 10, 11, 12, 13, 14; Table 8, 9) Description
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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 (c) 2005 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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