TS836 MICROPOWER VOLTAGE SUPERVISOR RESET ACTIVE HIGH . . .. . . . ULTRA LOW POWER CONSUMPTION : 12µA max. @ VCC = 5V PRECISION RESET THRESHOLD (guaranteed over Temperature) 4.50Vtyp. THRESHOLD VOLTAGE (TS836-4) GUARANTEED RESET OPERATION FOR VCC DOWN TO 1V OPEN DRAIN OUTPUT COMPARATOR WITH Vol = 450mVtyp. @ Iol = 8mA & VCC = 4V FAST RESPONSE TIME : 20µs FOR A 10mV OVERDRIVE 100mV INTERNAL HYSTERESIS D SO8 (Plastic Micropackage) Z TO92 (Plastic Package) ORDER CODES Part Number Temperature Range -40, +85oC TS836-4I Package D Z • ù PIN CONNECTIONS DESCRIPTION The TS836 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 4.5V for TS836-4 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 higher than the threshold. An internalhysteresisof 100mV increases the comparator’s noise margin and prevents false reset operation. .. TO92 (top view) 1 OUT 2 IN 3 GND SO8 NC 8 NC 7 NC 6 NC 5 1 OUT 2 IN 3 NC 4 GND APPLICATIONS Power-on reset generator for microcontroler Power failure detector September 1998 1/8 TS836 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC Supply Voltage - note 1 7 V Vout Output Voltage -0.3 to VCC+ 0.3 V Iout Output Current 20 mA Pd Power Dissipation 200 mW Toper Tstg Note: 1. Operating Free Air Temperature Range Storage Temperature -40 to +85 o -65 to +150 o C C All voltages values, except differential voltage are with respect to network ground terminal. OPERATING CONDITIONS Symbol VCC Parameter Supply Voltage Value Unit 1 to 5.5 V TS836-4 ELECTRICAL CHARACTERISTICS Tamb = 25oC (unless otherwise specified) Symbol 2/8 Min. Typ. Max. Unit Vthi Threshold Voltage - VCC Increasing Tmin. ≤ Tamb ≤ Tmax. Parameter 4.17 4.5 4.66 V Vthd Threshold Voltage - VCC Decreasing Tmin. ≤ Tamb ≤ Tmax. 4.17 4.4 4.66 V Vhys Hysteresis Voltage 50 100 200 mV ICC Current Consumption VCC = 5V 12 µA VOL Low Level Output Voltage IOL = 8mA, T min. ≤ Tamb ≤ Tmax. VCC = 4V 450 800 1000 mV IOH Output Off-state Leakage Tmin. ≤ Tamb ≤ Tmax. VCC = 5V 2 100 1000 nA tphl Response Time High to Low RL = 10kΩ, CL = 15pF, VCC = Vthd -10mV 20 µs TS836 EQUIVALENT SCHEMATIC DIAGRAM TIMING DIAGRAM 3/8 TS836 Vth vs Temperature while VCC increasing Vth vs Temperature while VCC decreasing Vthd (Volts) Vthi (Volts) 4,44 4,56 TS836-4 Vt 4,52 m ax Vt h d 4,42 x i a hm 4,4 4,48 Vt i hm 4,38 in 4,36 Vth dmin TS836-4 4,44 4,34 4,4 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (°C) 60 70 80 90 100 110 120 Hysteresis vs Temperature 4,32 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (°C) 60 70 80 90 100 110 120 ICC vs Temperature Icc (µA) Hysteresis ( mV) 9,6 160 TS836-4 I cc 9,4 a mx 140 9,2 I cc 120 mi n 9 8,8 100 8,6 TS836-4 80 8,4 60 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (°C) 60 70 80 90 100 110 120 Reset Output Voltage vs Input Voltage 8,2 -50 -40 -30 -20 -10 0 10 20 30 40 50 Temperature (°C) 60 70 80 90 100 110 120 Voltage Output Low vs Sink Current Vol (Volts) Output voltage ( V) 1 5 TS836-4 T=25°C 0,8 TS836-4 RL=10Kohms T=25°C 4 0,6 3 0,4 2 0,2 1 0 4,3 0 4,4 4,5 Input voltage (V) 4/8 4,6 0 2 4 6 8 10 Isink (mA) 12 14 16 18 20 TS836 Reset Output Voltage vs Input Voltage 5V Supply Falling down : Reset Delay Time TS836-4 RL=10Kohms T=25°C 5V TS836-4 RL=10Kohms T=25°C I nput signal 0.5V/di v 10 µs/di v I nput signal 2V/div 0.5ms/div 3.5V 0V 5V 3.5V Reset output 2V/div 0.5ms/div Reset output 2V/div 10 µs/div 0V 0V Supply Falling down : Extended Reset Delay Time with an Additional Capacitor Supply Rising up : Output Delay Time 5V 5V TS836-4 RL=10 Kohms CL=10 nF T=25°C I nput sig nal 0.5V/d iv 0.1 ms/div TS836-4 RL=10 Kohms T=25°C In put signal 0.5V/di v 0.5 µs/div 3.5V 3.5V 5V Reset outp ut 2V/div 0.1 ms/div 3.5V Reset output 2V/div 0.5 µs/div 0V 0V Reset Output Voltage vs Input Voltage (example) In put signal 2 V/div 0.5 ms/div Reset Output Voltage vs Input Voltage (example) 6V 4V TS836-4 RL=10 Kohms T=25°C Input signal 2 V/div 0.5 ms/div 5V 3V TS836-4 RL=10 Kohms T=25°C 6V 5V Reset output 2V/di v 0.5 ms/div Reset output 2V/div 0.5 ms/div 0V 0V 5/8 TS836 Basic Configuration Configuration with an additional Capacitive Load Load Resistor Vcc Input Voltage 6/8 Load Resistor Reset TS836 Output Voltage Vcc Input Voltage Reset TS836 Capacitive Load Output Voltage TS836 PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) Dim. A a1 a2 a3 b b1 C c1 D E e e3 F L M S Min. Millimeters Typ. 0.1 0.65 0.35 0.19 0.25 Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 Min. Inches Typ. 0.026 0.014 0.007 0.010 Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.189 0.228 0.197 0.244 0.004 o 45 (typ.) 4.8 5.8 5.0 6.2 1.27 3.81 3.8 0.4 0.050 0.150 4.0 1.27 0.6 0.150 0.016 0.157 0.050 0.024 o 8 (max.) 7/8 TS836 PACKAGE MECHANICAL DATA 3 PINS - PLASTIC PACKAGE TO92 Dim. Millimeters Min. L Typ. Inches Max. Min. Typ. 1.27 Max. 0.05 B 3.2 3.7 4.2 0.126 0.1457 0.1654 O1 4.45 5.00 5.2 0.1752 0.1969 0.2047 C 4.58 5.03 5.33 0.1803 0.198 0.2098 K 12.7 O2 0.407 0.0197 0.02 a 0.35 0.5 0.5 0.508 0.016 0.0138 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such info rmation 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 publ ication are subject to change without notice. Thi s publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for useas critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics 1998 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 8/8