TS831 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE LOW ■ ULTRA LOW POWER CONSUMPTION : 12µA maximum ■ PRECISION RESET THRESHOLD ■ THRESHOLD VOLTAGE: ■ ■ ■ ■ ■ 4.33V typ. FOR TS831-5 4.50V typ. FOR TS831-4 2.71V typ. FOR TS831-3 GUARANTEED RESET OPERATION FOR VCC DOWN TO 1V OPEN DRAIN OUTPUT COMPARATOR FAST RESPONSE TIME : 20µs FOR A 10mV OVERDRIVE INTERNAL BUILT-IN HYSTERESIS PIN TO PIN COMPATIBLE WITH MC33064 AND MC33164 D SO8 (Plastic Micropackage) Z TO92 (Plastic Package) DESCRIPTION The TS831 ultra low power integrated circuit incorporates a high stability band-gap voltage reference and a comparator with open drain output. The threshold voltage is set at 4.33V for TS831-5, 4.5V for TS831-4 and 2.71V for TS831-3 by internal thermally matched resistances. The comparator exhibits a 20µs response (with 10mV overdrive) and has an open drain output active when input voltage is lower than the threshold. An internal hysteresis, 100mV for TS831-4/ TS831-5 and 60mV for TS831-3, increases the comparator’s noise margin and prevents false reset operation. P TSSOP8 (Thin Shrink Small Outline Package) PIN CONNECTIONS (top view) SO8-TSSOP8 APPLICATION ■ Power-on reset generator for microcontroller ■ Power failure detector ORDER CODE TO92 Package Part Number Temperature Range TS831-5I TS831-4I TS831-3I -40, +125°C D Z P • • • • • • • • • Z= TO92 Plastic package D = Small Outline Package (SO) - also available in Tape & Reel (DT) P = Thin Shrink Small Outline Package (TSSOP) - only available in Tape & Reel (PT) October 2000 1/11 TS831 ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCC Supply Voltage 1) Vout Output Voltage Iout Pd IF Toper Tstg Value Unit 7 V -0.3 to Vcc + 0.3 V Output Sink Current TS831-5 and TS831-4 TS831-3 20 5 mA Power Dissipation 2) TO92 SO8 TSSOP8 625 700 625 mW Clamp Diode Forward Current, pin 1 to pin 2 3) 100 mA Operating Free Air Temperature Range -40 to +85 °C Storage Temperature -65 to +150 °C Value Unit 1 to 5.5 V 1. All voltages values, except differential voltage are with respect to network ground terminal. 2. T j = 150°C, Tamb = 25o C with Rthja = 200o C/W for TO-92 package Rthja = 175o C/W for SO8 package Rthja = 200o C/W for TSSOP8 package 3. Maximum package power dissipation limit s must be observed. OPERATING CONDITIONS Symbol VCC Parameter Supply Voltage TS831-5 ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Vthi Threshold Voltage - VCC Increasing -40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C 4.10 4.10 Vthd Threshold Voltage - VCC Decreasing -40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C 4.10 4.06 Vhys Hysteresis Voltage ICC Current Consumption VCC = 5V VCC = 4V, IOL = 8mA VOL Low Level Output Voltage -40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C IOH Low Level Output Voltage -40°C ≤ Tamb ≤ +125°C VCC = 5V tphl Response Time High to Low R L = 10kΩ, CL = 15pF, V CC = Vthd -10mV Typ. Unit 4.46 4.50 V 4.46 4.46 V 200 mV 12 µA 800 1000 1300 mV 100 1000 nA 4.33 4.21 50 100 450 2 20 Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. 2/11 Max. µs TS831 TS831-4 ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit 4.66 4.70 V 4.66 4.66 V 200 mV 12 µA 800 1000 1300 mV 100 1000 nA 4.50 Vthi Threshold Voltage - VCC Increasing -40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C 4.17 4.10 Vthd Threshold Voltage - VCC Decreasing -40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C 4.17 4.13 Vhys Hysteresis Voltage ICC Current Consumption VCC = 5V Low Level Output Voltage -40°C ≤ Tamb ≤ +85°C -40°C ≤ Tamb ≤ +125°C VCC = 4V, IOL = 8mA VOL IOH Low Level Output Voltage -40°C ≤ Tamb ≤ +125°C VCC = 5V tphl Response Time High to Low R L = 10kΩ, CL = 15pF, V CC = Vthd -10mV 4.40 50 100 450 2 µs 20 Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. TS831-3 ELECTRICAL CHARACTERISTICS Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Vthi Threshold Voltage - VCC Increasing -40°C ≤ Tamb ≤ +125°C 2.55 Vthd Threshold Voltage - VCC Decreasing -40°C ≤ Tamb ≤ +125°C 2.55 Vhys Hysteresis Voltage ICC Current Consumption VCC = 3V VOL Low Level Output Voltage -40°C ≤ Tamb ≤ +125°C VCC = 2.4V, I OL = 1mA IOH Low Level Output Voltage -40°C ≤ Tamb ≤ +125°C VCC = 3V tphl Response Time High to Low R L = 10kΩ, CL = 15pF, V CC = Vthd -10mV Typ. Max. 2.71 2.8 2.65 30 2.8 60 Unit V V 100 mV 12 µA 140 400 500 mV 2 100 1000 nA 20 µs Note : Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. 3/11 TS831 EQUIVALENT SCHEMATIC DIAGRAM TIMING DIAGRAM 4/11 TS831 Output voltage versus input voltage Reset output voltage versus Input voltage 10 5.0 TS831-3 R = 10 Kohms T=25°C TS831-3 R = 10 Kohms T=25°C 4.0 L Output voltage (V) Output voltage (V) 8 6 4 2 L 3.0 2.0 1.0 0 0 2 4 6 8 0.0 2.60 10 2.65 Input voltage (V) Output voltage versus input voltage 5.0 TS831-4 R = 10 Kohms T=25°C 8 4.0 L Output voltage (V) Output voltage (V) 2.75 Reset output voltage versus Input voltage 10 6 4 2 TS831-4 R = 10 Kohms T=25°C 3.0 L 2.0 1.0 0 0.0 0 2 4 6 8 10 4.4 4.5 Input voltage (V) 4.6 Input voltage (V) Output voltage versus input voltage Reset output voltage versus Input voltage 10 5.0 TS831-5 R = 10 Kohms T=25°C 8 4.0 L Output voltage (V) Output voltage (V) 2.70 Input voltage (V) 6 4 2 3.0 TS831-5 R = 10 Kohms T=25°C L 2.0 1.0 0 0 2 4 6 Input voltage (V) 8 10 0.0 4.20 4.24 4.28 4.32 4.36 4.40 Input voltage (V) 5/11 TS831 Vth versus temperature while Vcc increasing Vth versustemperature whileVcc decreasing 4.44 4.6 Vt h i x 4.40 4.5 i Vt h Vthd (Volts) Vthi (Volts) 4.5 Vth d m a 4.42 x ma m in 4.38 Vthd min 4.36 TS831-4 4.4 4.34 4.4 -40 -20 0 20 40 60 80 100 TS831-4 4.32 -40 120 -20 0 20 Temperature (°C) Hysteresis voltage versus temperature 60 80 100 120 100 120 Supply current versus temperature 9.6 160 Ic c 9.4 ma x TS831-4 Supply current (µA) 140 Hysteresis (mV) 40 Temperature (°C) 120 100 9.2 Ic c 9.0 mi n 8.8 T S8 31-4 No lo ad 8.6 8.4 80 8.2 -40 -20 0 20 40 60 80 100 120 -40 -20 0 Temperature (°C) Supply current vs input voltage & temperature 60 80 3 TS831-3 Vin=2.4V TS831-3 No Load 2.5 +125°C 12 +125°C 2 Vol (V) Supply current (µA) 40 Voltage output low vs Isink & temperature -40°C 16 20 Temperature (°C) 8 +85°C +25°C 1.5 -40°C 1 -40°C 25°C 4 0.5 0 0 0 2 4 6 Input voltage (V) 6/11 8 10 0 2 4 Isink (mA) 6 8 TS831 Supply current vs input voltage & temperature Voltage output low vs Isink & temperature 4 25°C TS831-4 Vin=4V TS83 1-4 No Load 12 +125°C +12 5°C +85°C +125°C 8 -40°C Vol (V) Supply current (µA) 3 +25°C 2 -40°C 25°C -40°C 4 1 0 0 0 2 4 6 8 10 0 5 10 Input voltage (V) Supply current vs inputvoltage &temperature 20 Voltage output low vs Isink & temperature 4 25°C TS831-5 No Load 12 -40°C +125°C 8 +125°C TS831-5 Vin=4V 3 +125°C Vol (V) Supply current (µA) 15 Isink (mA) +85°C 2 +25°C -40°C 25°C -40°C 4 1 0 0 0 2 4 6 8 0 10 5 10 Input voltage (V) Clamp diode forward current versus voltage 20 Response time 100 5V Input signal 4V Vin = 0V T=25°C 80 Forward current (mA) 15 Isink (mA) 5V 60 TS831-4 R = 10 Kohms T=25°C Reset output L 40 20 0V 0 0 0.5 1 Forward voltage (V) 1.5 0 20 40 60 80 100 Time (µs) 7/11 TS831 in Basic configuration TS831 Reset Microprocessor circuit Gnd Power Supply Pullup resistor Special remarks * Some microprocessor mayintegratethe pull upresistor. * For the pull up resistor choice, pleaseuse thegraphs nammed”Voltage output lowvs Isink&temperature” depending on TS831 versions. 8/11 TS831 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) Millimeters Inches Dim. Min. A a1 a2 a3 b b1 C c1 D E e e3 F L M S Typ. Max. 0.65 0.35 0.19 0.25 1.75 0.25 1.65 0.85 0.48 0.25 0.5 4.8 5.8 5.0 6.2 0.1 Min. Typ. Max. 0.026 0.014 0.007 0.010 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.189 0.228 0.197 0.244 0.004 45° (typ.) 1.27 0.050 3.81 3.8 0.4 0.150 4.0 1.27 0.6 0.150 0.016 0.157 0.050 0.024 8° (max.) 9/11 TS831 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 Millimeters Inches Dim. Min L B O1 C K O2 a 10/11 3.2 4.45 4.58 12.7 0.407 0.35 Typ. Max. 1.27 3.7 5.00 5.03 4.2 5.2 5.33 0.5 0.508 Min. 0.126 0.1752 0.1803 0.5 0.016 0.0138 Typ. Max. 0.05 0.1457 0.1969 0.198 0.1654 0.2047 0.2098 0.0197 0.02 TS831 PACKAGE MECHANICAL DATA 8 PINS - THIN SHRINK SMALL OUTLINE PACKAGE k 0,25 mm c C SEATING PLANE E1 L1 L .010 inch GAGE PLANE A E A2 e 1 aaa 8 C b D 5 4 A1 PIN 1 IDENTIFICATION Millimeters Inches Dim. Min. A A1 A2 b c D E E1 e k l 0.05 0.80 0.19 0.09 2.90 4.30 0° 0.50 Typ. 1.00 3.00 6.40 4.40 0.65 0.60 Max. Min. 1.20 0.15 1.05 0.30 0.20 3.10 0.01 0.031 0.007 0.003 0.114 4.50 0.169 8° 0.75 0° 0.09 Typ. 0.039 0.118 0.252 0.173 0.025 0.0236 Max. 0.05 0.006 0.041 0.15 0.012 0.122 0.177 8° 0.030 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibil ity for the consequences of use of such information nor for any infring ement of patents or other righ ts 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 witho ut notice. This publ ication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life suppo rt devices or systems withou t express written approval of STMicroelectronics. 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