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 - 0.9µA (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 –40°C TO 85°C 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 2/21 . . . . 15 . . . . 15 . . . . 16 . . . . 16 STM1061 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 3/21 STM1061 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 re- mains 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 Table 1. Signal Names VCC STM1061 VCC Supply Voltage VSS Ground AI10477 Figure 3. SOT23-3 Connections 1 2 3 VCC AI10478 4/21 Open Drain Active-Low Output OUT VSS OUT VSS OUT Figure 4. SOT323-3 (SC70-3) Connections VSS OUT 1 2 3 VCC AI10479 STM1061 Figure 5. N-Channel Open Drain Output Block Diagram VCC VOUT R1 + – VREF R2 VSS R3 AI10482 Figure 6. STM1061N Active-Low, Open Drain Hardware Hookup DC/DC Converter VOUT VIN Regulated 3V VSS VCC + 3.6V STM1061N (Open Drain) OUT VCC VSS MCU Suspend VSS AI10484 5/21 STM1061 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. 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. Table 2. Pin Functions Pin Name Function SOT23-3 SOT323-3 (SC70-3) 1 2 OUT Active-Low Open Drain Output 3 3 VCC Supply Voltage 2 1 VSS 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 25°C. 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. 6/21 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 0.1µF bypass capacitor mounted as close as possible to the VCC pin provides additional transient immunity. STM1061 TYPICAL OPERATING CHARACTERISTICS Figure 7. Supply Current vs. Input Voltage 1400 1200 ICC (nA) 1000 800 600 Temp = –40°C 400 Temp = 25°C 200 Temp = 85°C 0 0 1 2 3 4 5 VCC (V) 6 AI11119b Figure 8. Supply Current vs. Ambient Temperature Supply Current: ICC (nA) 1250 1000 750 VCC = 5V 500 VCC = 3V VCC = 2V 250 0 -40 -20 0 20 40 60 80 Ambient Temperature (°C) AI11120b 7/21 STM1061 Figure 9. Output Detect Delay Time vs. Ambient Temperature VCC-to-OUT Detect Delay: tPD (µs) 35.00 30.00 VTH– = 3.4V 25.00 20.00 15.00 VTH– = 1.6V 10.00 5.00 0.00 –40 –20 0 20 40 60 80 Ambient Temperature: TA (°C) AI11121b Figure 10. Output Release Delay Time vs. Ambient Temperature 50.00 VCC-to-OUT Release Delay: tPR (µs) 45.00 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 Ambient Temperature: TA (°C) 8/21 60 80 AI11122b STM1061 Figure 11. Maximum Transient Duration vs. Reset Threshold Overdrive 160 Transient Duration (µs) 140 VTH– = 3.4V 120 VTH– = 1.6V 100 80 60 40 20 0 1 10 100 1000 10000 Threshold Overdrive (mV) AI11123b Note: Reset occurs above the curve. Figure 12. Detect, Release Voltage vs. Ambient Temperature for VTH– = 3.4V Detect, Release Voltage: VTH–, VTH+ (V) 3.6 3.5 Detect Voltage, VTH– Release Voltage, VTH+ 3.4 3.3 –40 –20 0 20 40 60 80 Ambient Temperature (°C) AI11124b 9/21 STM1061 Figure 13. N-channel Driver Output Current vs. VDS 0.06 VCC = 3.3V 0.05 Output Current: ID (A) VCC = 3.0V VCC = 2.7V 0.04 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 Output Voltage: VDS (V) 1.5 AI11125b Figure 14. N-channel Driver Output Current vs. Input Voltage for VDS = 0.5V 30 Output Current: IOUT (mA) 25 Temp. (25°C) 20 Temp. (85°C) Temp. (–40°C) 15 10 5 0 0 0.5 1 1.5 2 2.5 3 Input Voltage: VCC (V) AI11126b 10/21 STM1061 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 im- 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. Table 3. Absolute Maximum Ratings Symbol Parameter Value Unit TSTG Storage Temperature (VCC Off, VBAT Off) –55 to 150 °C TSLD(1) Lead Solder Temperature for 10 seconds 260 °C –0.3 to VCC +0.3 V VIO Input or Output Voltage VCC Supply Voltage 0.7 to 6.0 V IO Output Current 20 mA PD Power Dissipation 320 mW Note: 1. Reflow at peak temperature of 255°C to 260°C for < 30 seconds (total thermal budget not to exceed 180°C for between 90 to 150 seconds). 11/21 STM1061 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 STM1061 Unit 0.7 to 6.0 V ≤5 ns Input Pulse Voltages 0.2 to 0.8VCC V Input and Output Timing Ref. Voltages 0.3 to 0.7VCC V VCC Supply Voltage Input Rise and Fall Times Figure 15. AC Testing Input/Output Waveforms 0.8VCC 0.7VCC 0.3VCC 0.2VCC AI02568 Figure 16. Voltage Timing Waveform VCC VTH+ VTH– Release Voltage (VTH+ = VTH– + VHYST) Detect Voltage VCC (min) VSS VOUT tPD Detect Delay VSS tPR Release Delay AI10483 12/21 STM1061 Table 5. DC and AC Characteristics Sym Description VCC Operating Voltage ICC VCC Supply Current IOUT Output Current, N-channel (VDS = 0.5V), Reset asserted Test Condition(1) Min Typ 0.7 Max Unit 6.0 V VCC = 3.0V, No Load 0.9 3.0 µA VCC = 5.5V, No Load 1.1 3.6 µA VCC = 1.0V 1.0 1.7 mA VCC = 2.0V 3.0 14 mA VCC = 3.0V 5.0 22 mA VCC = 4.0V 6.0 26 mA VCC = 5.0V 7.0 30 mA VTH– – 2% VTH– Voltage Thresholds VTH– Detect Voltage (see Table 9., page 18 for detailed listing) VTH+ Release Voltage VHYST tPD tPR VTH– + 2% VTH– + VHYST 0.02VTH– Threshold Hysteresis 0.05VTH– VCC to OUT Detect Delay VCC falling from (VTH– + 100mV) to (VTH– – 100mV) at 10mV/µs 25 VCC to OUT Release Delay VCC rising from (VTH+ – 100mV) to (VTH+ + 100mV) at 10mV/µs 30 Threshold Temperature Coefficient ±100 V V 0.08VTH– V µs 200 µs ppm/ oC Note: 1. Valid for Ambient Operating Temperature: TA = 25°C. 13/21 STM1061 PACKAGE MECHANICAL In order to meet environmental requirements, ST offers these devices in ECOPACK® 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. 14/21 STM1061 Figure 17. SOT23-3 – 3-lead Small Outline Transistor Package Outline E E1 0.15 B M CAB A1 1 e D e1 0.20 M 3X CAB A2 0.10 C A 3X b C A C θ L1 C L SOT23-3 Note: Drawing is not to scale. Table 6. SOT23-3 – 3-lead Small Outline Transistor Package Mechanical Data mm inches Symbol Typ Min Max A 0.89 A1 Min Max 1.12 0.035 0.044 0.01 0.10 0.001 0.004 A2 0.88 1.02 0.035 0.042 b 0.30 0.50 0.012 0.020 C 0.08 0.20 0.003 0.008 D 2.80 3.04 0.110 0.120 E 2.10 2.64 0.083 0.104 E1 1.20 1.40 0.047 0.055 e 0.89 1.03 0.035 0.041 e1 1.78 2.05 0.070 0.081 L 0.54 Typ 0.021 L1 0.40 0.60 0.016 0.024 Θ 0° 8° 0° 8° N 3 3 15/21 STM1061 Figure 18. SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Outline E E1 0.30 B M CAB A1 1 e D e1 0.10 M 3X CAB C θ1 C A2 0.10 C A 3X b A θ L1 C L SOT323-3 Note: Drawing is not to scale. Table 7. SOT323-3 (SC70-3) – 3-lead Small Outline Transistor Package Mechanical Data mm inches Symbol Typ 16/21 Min Max A 0.80 A1 Typ Min Max 1.10 0.031 0.043 0.00 0.10 0.000 0.004 A2 0.80 1.00 0.031 0.039 b 0.25 0.40 0.010 0.016 C 0.10 0.18 0.004 0.007 D 1.80 2.20 0.071 0.087 E 1.80 2.40 0.071 0.094 E1 1.15 1.35 0.045 0.053 e 0.65 0.026 e1 1.30 0.051 L 0.35 0.45 0.014 0.018 L1 0.10 0.30 0.004 0.012 Θ 0° 30° 0° 30° Θ1 8° 12° 8° 12° N 3 3 STM1061 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 85°C 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. 17/21 STM1061 Table 9. Factory-Trimmed Thresholds with Marking Description Suffix 18/21 Threshold Voltage VTH– (V) at TA = 25°C Topside Marking Min (–2%) Typ Max (+2%) 16 1.568 1.600 1.632 16Nx 17 1.666 1.700 1.734 17Nx 18(1) 1.764 1.800 1.836 18Nx 19(1) 1.862 1.900 1.938 19Nx 20(1) 1.960 2.000 2.040 20Nx 21(1) 2.058 2.100 2.142 21Nx 22 2.156 2.200 2.244 22Nx 23 2.254 2.300 2.346 23Nx 24(1) 2.352 2.400 2.448 24Nx 25(1) 2.450 2.500 2.550 25Nx 26 2.548 2.600 2.652 26Nx 27 2.646 2.700 2.754 27Nx 28 2.744 2.800 2.856 28Nx 29 2.842 2.900 2.958 29Nx 30(1) 2.940 3.000 3.060 30Nx 31 3.038 3.100 3.162 31Nx 32(1) 3.136 3.200 3.264 32Nx 33(1) 3.234 3.300 3.366 33Nx 34 3.332 3.400 3.468 34Nx 35(1) 3.430 3.500 3.570 35Nx 36(1) 3.528 3.600 3.672 36Nx 37(1) 3.626 3.700 3.774 37Nx 38(1) 3.724 3.800 3.876 38Nx 39(1) 3.822 3.900 3.978 39Nx 40(1) 3.920 4.000 4.080 40Nx 41(1) 4.018 4.100 4.182 41Nx 42(1) 4.116 4.200 4.284 42Nx 43(1) 4.214 4.300 4.386 43Nx 44(1) 4.312 4.400 4.488 44Nx 45(1) 4.410 4.500 4.590 45Nx 46(1) 4.508 4.600 4.692 46Nx STM1061 Suffix Threshold Voltage VTH– (V) at TA = 25°C Topside Marking Min (–2%) Typ Max (+2%) 47(1) 4.606 4.700 4.794 47Nx 48(1) 4.704 4.800 4.896 48Nx 49(1) 4.802 4.900 4.998 49Nx 50(1) 4.900 5.000 5.100 50Nx 51(1) 4.998 5.100 5.202 51Nx 52(1) 5.096 5.200 5.304 52Nx 53(1) 5.194 5.300 5.406 53Nx 54(1) 5.292 5.400 5.508 54Nx 55(1) 5.390 5.500 5.610 55Nx Note: 1. Contact local ST sales office for availability. 19/21 STM1061 REVISION HISTORY Table 10. Document Revision History Date Version 20-January-2004 1.0 First Edition 01-Aug-05 1.1 Update Operation section, characteristics; insert new graphics; add ECOPACK information (Figure 7, 8, 9, 10, 11, 12, 13, 14; Table 5, 8, 9) 02-Sep-05 1.2 Update characteristics, remove ‘push-pull output’ reference (Figure 8, 9, 10, 11, 12, 16; Table 2, 4, 5, 8) 19-Oct-05 2.0 Status upgrade; update characteristics; add Marking information (Figure 7, 8, 9, 10, 11, 12, 13, 14; Table 8, 9) 20/21 Description STM1061 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 © 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 21/21