Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 ADM6316-ADM6322 Preliminary Technical Data FEATURES FUNCTIONAL BLOCK DIAGRAM 26 Reset Threshold Options: 2.5V to 5V in 100mV Increments 4 Reset Timeout Options: 1ms, 20ms, 140ms and 1120ms (Min) 4 Watchdog Timeout Options: 6.3ms, 102ms, 1600ms and 25.6s (Typ) Manual Reset Input Reset Output Stages Push-Pull Active-Low Open-Drain Active-Low Push-Pull Active-High Low Power Consumption (3A) Guaranteed Reset Output valid to VCC=1V Power Supply Glitch Immunity Specified Over Industrial Temperature Range 5-Lead SOT-23 Package VCC ADM6316 VCC RESET GENERATOR VREF MR RESET DEBOUNCE WATCHDOG DETECTOR GND WDI APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Portable Equipment GENERAL DESCRIPTION Each part is available in a choice of 26 reset threshold options ranging from 2.5V to 5V in 100mV increments. There are also 4 reset timeout options of 1ms, 20ms, 140ms and 1120ms (min) and 4 watchdog timeout options of 6.3ms 102ms, 1600ms and 25.6s (typ). The ADM6316-ADM6322 are supervisory circuits which monitor power supply voltage levels and code execution integrity in microprocessor-based systems. As well as providing power on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by means of an external push-button, through a manual reset input. The seven parts feature different combinations of watchdog input, manual reset input and output stage configuration, as shown in table 1. The ADM6316-ADM6322 are available in 5-lead SOT-23 packages and typically consume only 3A, making them suitable for use in low power portable applications. Table 1. Selection Table Part No. Watchdog Manual Reset ADM6316 ADM6317 ADM6318 ADM6319 ADM6320 ADM6321 ADM6322 Yes Yes Yes Yes Yes - Yes Yes Yes Yes Yes Output Stage RESET RESET Push-Pull Push-Pull Push-Pull Open-Drain Open-Drain Open-Drain Push-Pull Push-Pull Push-Pull Push-Pull Push-Pull Rev. PrB Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. www.analog.com Tel: 781.329.4700 Fax: 781.326.8703 (c) 2004 Analog Devices, Inc. All rights reserved. ADM6316-ADM6322 Preliminary Technical Data ADM6316-ADM6322--SPECIFICATIONS Table 2. VCC=Full Operating Range, TA=TMIN to TMAX, unless otherwise noted Parameter SUPPLY VCC Operating Voltage Range Supply Current Min Typ Max Units 10 5 5.5 20 12 V A A 1 Test Conditions/Comments VCC=5.5V VCC=3.6V RESET THRESHOLD VOLTAGE RESET THRESHOLD TEMPERATURE COEFFICIENT RESET THRESHOLD HYSTERESIS RESET TIMEOUT PERIOD ADM63__A ADM63__B ADM63__C ADM63__D VCC TO RESET DELAY PUSH-PULL OUTPUT (ADM6316, ADM6317, ADM6318, ADM6319, ADM6321, ADM6322) RESET Output Voltage VTH-1.5% VTH-2.5% VTH VTH 40 3 VTH+1.5% VTH+2.5% V V ppm/C mV 1 20 140 1120 1.4 28 200 1600 40 2 40 280 2240 ms ms ms ms s 0.3 0.3 0.3 0.4 0.8x VCC VCC-1.5 5 RESET Rise Time RESET Output Voltage 25 Open-Drain Reset Output Leakage Current WATCHDOG INPUT (ADM6316, ADM6317, ADM6318, ADM6320, ADM6321) Watchdog Timeout Period WDI Pulse Width WDI Input Threshold 4.3 71 1.12 17.9 50 6.3 102 1.6 25.6 -20 120 -15 Rev.PrB | Page 2 of 8 VCC>=1.0V, ISINK=50A VCC>=1.2V, ISINK=100A VCC>=2.7V, ISINK=1.2mA VCC>=4.5V, ISINK=3.2mA VCC>=2.7V, ISOURCE=500A VCC>=4.5V, I SOURCE=800A From 10% to 90% VCC, CL=5pF, VCC =3.3V VCC>=2.7V, ISINK=1.2mA VCC>=4.5V, ISINK=3.2mA VCC>=1.8V, ISOURCE=150A VCC>=2.7V, ISOURCE=500A VCC>=4.5V, I SOURCE=800A V V V V 0.3 0.3 0.3 0.4 1 V V V V A VCC>=1.0V, ISINK=50A VCC>=1.2V, ISINK=100A VCC>=2.7V, ISINK=1.2mA VCC>=4.5V, ISINK=3.2mA 9.3 153 2.4 38.4 ms ms s s ns ADM63___W ADM63___X ADM63___Y ADM63___Z VIL=0.3xVCC, VIH=0.7xVCC, V V A A VWDI= VCC, time average VWDI=0, time average 0.3xVCC WDI Input Current VCC falling at 1mV/s 0.3 0.4 0.8x VCC 0.8x VCC VCC-1.5 OPEN-DRAIN OUTPUT (ADM6320, ADM6321, ADM6322) RESET Output Voltage V V V V V V ns TA=+25C TA=-40C to +85C 0.7xVCC 160 Preliminary Technical Data ADM6316-ADM6322 Parameter MANUAL RESET INPUT (ADM6316, ADM6317, ADM6319, ADM6320, ADM6322) MR Input Threshold Min Typ Max 0.8 2.0 0.3xVCC 0.7xVCC 1 MR Input Pulse Width MR Glitch Rejection MR Pull-up Resistance MR to Reset Delay 35 100 52 230 75 Units V V V V s ns k ns Test Conditions/Comments VTH>4.0V VTH>4.0V VTH<4.0V VTH<4.0V VCC=5V ABSOLUTE MAXIMUM RATINGS Table 3. TA = 25C unless otherwise noted. Parameter VCC RESET (ADM6320, ADM6321, ADM6322) Output Current (RESET, RESET) Operating Temperature Range Storage Temperature Range JA Thermal Impedance, SOT-23 Lead Temperature Soldering (10 sec) Vapour Phase (60 sec) Infrared (15 sec) Rating -0.3V to +6V -0.3V to +6V 20mA -40C to +85C -65C to +125C 270C/W Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 300C 215C 220C Rev.PrB | Page 3 of 8 ADM6316-ADM6322 Preliminary Technical Data PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS RESET GND 1 2 ADM6316/ ADM6320 5 VCC RESET 1 GND TOP VIEW 2 (Not to Scale) MR 3 RESET 1 GND 2 ADM6318/ ADM6321 3 VCC 4 WDI 5 VCC 4 MR TOP VIEW (Not to Scale) 4 WDI MR 3 5 VCC RESET 1 GND 2 TOP VIEW (Not to Scale) RESET 5 ADM6317 ADM6319/ ADM6322 TOP VIEW (Not to Scale) 4 WDI RESET 3 Table 4. Pin Functional Descriptions Pin No. 1 Name RESET (ADM6316/18/19/20/21/22) 2 3 RESET (ADM6317) GND MR (ADM6316/17/20) 4 RESET (ADM6318/19/21/22) WDI (ADM6316/17/18/20/21) 5 MR (ADM6319/22) Description Active-Low Reset Output, which is asserted whenever VCC is below the reset.threshold, VTH. Push-Pull Output Stage for ADM6316/18/19. Open-Drain Output Stage for ADM6320/21/22. Active-High, Push-Pull Reset Output. Ground Manual Reset Input. This is an active-low input which, when forced low for at least 1s, generates a reset. Features a 52k internal pull-up. Active-High, Push-Pull Reset Output. Watchdog Input. Generates a reset if the logic level on the pin remains low or high for the duration of the watchdog timeout. The timer is cleared if a logic transition occurs on this pin or if a reset is generated. Leave floating to disable the watchdog timer. Manual Reset Input. VCC Power Supply Voltage being Monitored ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev.PrB | Page 4 of 8 Preliminary Technical Data ADM6316-ADM6322 TYPICAL PERFORMANCE CHARACTERISTICS Figure 1. Supply Current vs. Temperature (ADM6316/ADM6317/ADM6318/ADM6320/ADM6321) Figure 4. Normalized Reset Timeout Period vs. Temperature Figure 2. VCC Falling to Reset Propagation Delay vs. Temperature Figure 5. Normalized Watchdog Timeout Period vs. Temperature (ADM6316/ADM6317/ADM6318/ADM6320/ADM6321) Figure 3. Manual Reset to Reset Propagation Delay vs. Temperature (ADM6316/ADM6317/ADM6319/ADM6320/ADM6322) Figure 6. Maximum VCC Transient Duration vs. Reset Threshold Overdrive Rev.PrB | Page 5 of 8 ADM6316-ADM6322 Preliminary Technical Data Table 5. Reset Threshold Options Part No. TA=+25C Typ 5.000 4.900 4.800 4.700 4.630 4.500 4.390 4.300 4.200 4.100 4.00 3.900 3.800 3.700 3.600 3.500 3.400 3.300 3.200 3.080 3.000 2.930 2.800 2.700 2.630 2.500 Min 4.925 4.827 4.728 4.630 4.561 4.433 4.314 4.236 4.137 4.039 3.940 3.842 3.743 3.645 3.546 3.448 3.349 3.251 3.152 3.034 2.955 2.886 2.758 2.660 2.591 2.463 ADM63__50 ADM63__49 ADM63__48 ADM63__47 ADM63__46 ADM63__45 ADM63__44 ADM63__43 ADM63__42 ADM63__41 ADM63__40 ADM63__39 ADM63__38 ADM63__37 ADM63__36 ADM63__35 ADM63__34 ADM63__33 ADM63__32 ADM63__31 ADM63__30 ADM63__29 ADM63__28 ADM63__27 ADM63__26 ADM63__25 TA=-40C to +85C Max 5.075 4.974 4.872 4.771 4.699 4.568 4.446 4.365 4.263 4.162 4.060 3.959 3.857 3.756 3.654 3.553 3.451 3.350 3.248 3.126 3.045 2.974 2.842 2.741 2.669 2.538 Min 1 20 140 1.12 Typ 1.6 30 200 1.60 Max 2 40 280 2.24 Max 5.125 5.023 4.920 4.818 4.746 4.613 4.490 4.408 4.305 4.203 4.100 3.998 3.895 3.793 3.690 3.588 3.485 3.383 3.280 3.157 3.075 3.000 2.870 2.768 2.696 2.563 Table 7. Watchdog Timeout Options Table 6. Reset Timeout Options Suffix A B C D Min 4.875 4.778 4.680 4.583 4.514 4.388 4.270 4.193 4.095 3.998 3.900 3.803 3.705 3.608 3.510 3.413 3.315 3.218 3.120 3.003 2.925 2.857 2.730 2.633 2.564 2.438 Units ms ms ms s Suffix W X Y Z Min 4.3 71 1.12 17.9 Typ 6.3 102 1.6 25.6 Max 9.3 153 2.4 38.4 Units ms ms s s Table 8. Standard Models Model ADM6316LARJ29CY ADM6316LARJ46CY ADM6318LHARJ46CY ADM6319LHARJ46C ADM6320PARJ29CY ADM6320PARJ46CY ADM6321HPARJ46CY ADM6322HPARJ46C Reset Threshold (V) 2.93 4.63 4.63 4.63 2.93 4.63 4.63 4.63 Minimum Reset Timeout (ms) 140 140 140 140 140 140 140 140 Rev.PrB | Page 6 of 8 Typical Watchdog Timeout (s) 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 Preliminary Technical Data ADM6316-ADM6322 OUTLINE DIMENSIONS 2.90 BSC 5 4 2.80 BSC 1.60 BSC 1 2 3 PIN 1 0.95 BSC 1.90 BSC 1.30 1.15 0.90 1.45 MAX 0.15 MAX 0.50 0.3 0.22 0.08 SEATING PLANE 10 5 0 COMPLIANT TO JEDEC STANDARDS MO-178AA Figure 7. 5-Lead Small Outline Transistor Package [SOT-23] (RJ-5) Dimensions shown in millimeters Rev.PrB | Page 7 of 8 0.$ 0.45 0.3 ADM6316-ADM6322 Preliminary Technical Data ORDERING GUIDE ADM63__ __ A RJ __ __ __ Generic No. Watchdog Timeout Period (16 - 22) W: 6.3ms (typ) X: 102ms (typ) Y: 1.6s (typ) Z: 25s (typ) Output Configuration: L: Active-Low H: Active-High P: Open-Drain Temperature Range: A: CCto A: -40 -40C to +85 +85C Reset Timeout Period Package Code: RJ: 5-Lead SOT-23 Reset Threshold No. (25 - 50) A: 1ms (min) B: 20ms (min) C: 140ms (min) D: 1120ms (min) Figure 8. Ordering Code Structure Model1 ADM6316__ARJ __ _ _ -RL ADM6316__ARJ __ _ _ -R7 ADM6317__ARJ __ _ _ -RL ADM6317__ARJ __ _ _ -R7 ADM6318__ARJ __ _ _ -RL ADM6318__ARJ __ _ _ -R7 ADM6319__ARJ __ _ _ -RL ADM6319__ARJ __ _ _ -R7 ADM6320__ARJ __ _ _ -RL ADM6320__ARJ __ _ _ -R7 ADM6321__ARJ __ _ _ -RL ADM6321__ARJ __ _ _ -R7 ADM6322__ARJ __ _ _ -RL ADM6322__ARJ __ _ _ -R7 1 Temperature Range -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C Quantity 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k Contact factory for availability of non-standard models (See table 8 for list of standard models) (c) 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. Printed in the U.S.A. PR04533-0-3/04(PrB) Rev.PrB | Page 8 of 8 Package Type SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 Branding N00 N00 N01 N01 N02 N02 N03 N03 N04 N04 N05 N05 N06 N06