ADM8617

Preliminary Technical Data FEATURES Precision 1.8V to 5V Power Supply Monitoring 9 Reset Threshold Options: 1.58V to 4.63V 140ms (Min) Reset Timeout Manual Reset Input (ADM8611) Watchdog Timer (ADM8616–ADM8618) Reset Output Stages Push-Pull Active-Low Open-Drain Active-Low Push-Pull Active-High Low Power Consumption (3µA) Guaranteed Reset Output valid to VCC=1V Power Supply Glitch Immunity Specified Over -40°C to +85°C Temperature Range 4-Lead SC70 Package Low-Voltage Manual Reset & Watchdog Supervisory Circuits in 4-Lead SC70 ADM8611/ADM8616/ADM8617/ADM8618 FUNCTIONAL BLOCK DIAGRAMS VCC ADM8616 VCC VREF RESET GENERATOR RESET WATCHDOG DETECTOR GND WDI APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Portable Equipment Figure 1. GENERAL DESCRIPTION The ADM8611/ADM8616/ADM8617/ADM8618 are supervisory circuits which monitor power supply voltage levels and code execution integrity in microprocessor-based systems. A power-on-reset signal is generated when the supply voltage rises to a preset threshold level. The ADM8611’s debounced manual reset input can be used to initiate a reset by means of an external push-button or logic signal. The ADM8616–ADM8618 have an on-chip watchdog timer which can reset the microprocessor if it fails to strobe within a preset timeout period. Each part is available in a choice of the following 9 reset threshold options: 1.58V, 1.67V, 2.19V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V and 4.63V. The reset timeout periods are 20ms (min) and 140ms (min) for the ADM8611 and ADM8616– ADM8618, respectively. The watchdog timeout period is 1.6s (typ). The parts differ in terms of reset output configuration, as indicated in table 1. The ADM8611/ADM8616/ADM8617/ADM8618 are available in 4-lead SC70 packages and typically consume only 3µA, making them suitable for use in low power portable applications. Table 1. Selection Table Part No. ADM8611 ADM8616 ADM8617 ADM8618 Manual Reset Yes Watchdog Yes Yes Yes Output Stage RESET Push-Pull Push-Pull Open-Drain Push-Pull RESET 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 © 2004 Analog Devices, Inc. All rights reserved. ADM8611/ADM8616/ADM8617/ADM8618 ADM8611/ADM8616/ADM8617/ADM8618—SPECIFICATIONS Table 2. VCC=Full Operating Range, TA=TMIN to TMAX, unless otherwise noted Parameter SUPPLY VCC Operating Voltage Range Supply Current RESET THRESHOLD VOLTAGE ADM861_L ADM861_M ADM861_T ADM861_S ADM861_R ADM861_Z ADM861_Y ADM861_W ADM861_V RESET THRESHOLD TEMPERATURE COEFFICIENT RESET THRESHOLD HYSTERESIS RESET TIMEOUT PERIOD VCC TO RESET DELAY PUSH-PULL OUTPUT (ADM8611, ADM8616, ADM8618) RESET Output Voltage Min 1 10 5 4.50 4.25 3.00 2.85 2.55 2.25 2.12 1.62 1.52 4.63 4.38 3.08 2.93 2.63 2.32 2.19 1.67 1.58 40 3 30 200 40 Typ Max 5.5 20 12 4.75 4.50 3.15 3.00 2.70 2.38 2.25 1.71 1.62 Preliminary Technical Data Units V µA µA V V V V V V V V V ppm/°C mV ms ms µs V V V V V V ns V V V V Test Conditions/Comments VCC=5.5V VCC=3.6V TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C TA=-40°C to +85°C 20 140 40 280 ADM8611 ADM8616–ADM8618 VCC falling at 1mV/µs VCC>=1.0V, ISINK=50µA VCC>=1.2V, ISINK=100µA VCC>=2.7V, ISINK=1.2mA VCC>=4.5V, ISINK=3.2mA VCC>=2.7V, ISOURCE=500µA VCC>=4.5V, I SOURCE=800µA 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=150µA VCC>=2.7V, ISOURCE=500µA VCC>=4.5V, I SOURCE=800µA VCC>=1.0V, ISINK=50µA VCC>=1.2V, ISINK=100µA VCC>=2.7V, ISINK=1.2mA VCC>=4.5V, ISINK=3.2mA 0.3 0.3 0.3 0.4 0.8x VCC VCC-1.5 RESET Rise Time RESET Output Voltage 0.8x VCC 0.8x VCC VCC-1.5 OPEN-DRAIN OUTPUT (ADM8617) RESET Output Voltage 5 25 0.3 0.4 Open-Drain Reset Output Leakage Current 0.3 0.3 0.3 0.4 1 V V V V µA Rev. PrB | Page 2 of 7 Preliminary Technical Data Parameter MANUAL RESET INPUT (ADM8611) MR Input Threshold MR Input Pulse Width MR Glitch Rejection MR Pull-up Resistance MR to Reset Delay WATCHDOG INPUT (ADM8616, ADM8617, ADM8618) Watchdog Timeout Period Min Typ ADM8611/ADM8616/ADM8617/ADM8618 Max 0.3xVCC 0.7xVCC 1 25 100 50 200 6.3 102 1.6 25.6 75 Units V V µs ns k ns ms ms s s ns V V µA µA ADM86___W ADM86___X ADM86___Y ADM86___Z VIL=0.3xVCC, VIH=0.7xVCC, Test Conditions/Comments WDI Pulse Width WDI Input Threshold WDI Input Current 4.3 71 1.12 17.9 50 0.3xVCC 9.3 153 2.4 38.4 -20 120 -15 0.7xVCC 160 VWDI= VCC, time average VWDI=0, time average ABSOLUTE MAXIMUM RATINGS Table 3. TA = 25°C unless otherwise noted. Parameter VCC RESET/RESET Output Current (RESET, RESET) Operating Temperature Range Storage Temperature Range θJA Thermal Impedance, SC70 Lead Temperature Soldering (10 sec) Vapour Phase (60 sec) Infrared (15 sec) Rating -0.3V to +6V -0.3V to +6V 20mA -40°C to +85°C -65°C to +150°C 146°C/W 300°C 215°C 220°C 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. Rev. PrB | Page 3 of 7 ADM8611/ADM8616/ADM8617/ADM8618 PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS RESET/RESET 1 4 Preliminary Technical Data VCC ADM861x TOP VIEW ( Not t o Scale) MR/WDI 2 3 GND Table 4. Pin Functional Descriptions Pin No. 1 Name RESET (ADM8616/ADM8617) 2 RESET (ADM8618) MR (ADM8611) WDI (ADM8616/ADM8617/ADM8618) 3 4 GND VCC Description Active-Low Reset Output, which is asserted whenever VCC is below the reset.threshold, VTH. Push-Pull Output Stage for ADM8616. Open-Drain Output Stage for ADM8617. Active-High, Push-Pull Reset Output. Manual Reset Input. This is an active-low input which, when forced low for at least 1µs, generates a reset. Features a 52k internal pull-up. 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. Ground 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 7 Preliminary Technical Data OUTLINE DIMENSIONS 1.35 1.15 4 ADM8611/ADM8616/ADM8617/ADM8618 2.20 1.80 3 2.40 1.80 1 2 PIN 1 0.65 BSC 1.00 0.80 0.50 BSC 1.10 0.80 0.18 0.10 0.30 0.10 0.10 MAX 0.30 0.15 SEATING 0.70 PLANE 0.50 0.10 COPLANARITY P ACKAGE OUTLINE CORRESPONDS IN FULL TO EIAJ SC82 EXCEPT FOR WIDTH OF PIN-2 AS SHOWN Figure 2. 4-Lead Plastic Surface Mount Package [SC70] (KS-4) Dimensions shown in millimeters Rev. PrA | Page 5 of 7 ADM8611/ADM8616/ADM8617/ADM8618 ORDERING GUIDE (ADM8611/ADM8616) Model1 ADM8611LABKS-RL ADM8611LABKS-RL7 ADM8611MABKS-RL ADM8611MABKS-RL7 ADM8611TABKS-RL ADM8611TABKS-RL7 ADM8611SABKS-RL ADM8611SABKS-RL7 ADM8611RABKS-RL ADM8611RABKS-RL7 ADM8611ZABKS-RL ADM8611ZABKS-RL7 ADM8611YABKS-RL ADM8611YABKS-RL7 ADM8611WABKS-RL ADM8611WABKS-RL7 ADM8611VABKS-RL ADM8611VABKS-RL7 ADM8616LAKS-RL ADM8616LAKS-RL7 ADM8616MAKS-RL ADM8616MAKS-RL7 ADM8616TAKS-RL ADM8616TAKS-RL7 ADM8616SAKS-RL ADM8616SAKS-RL7 ADM8616RAKS-RL ADM8616RAKS-RL7 ADM8616ZAKS-RL ADM8616ZAKS-RL7 ADM8616YAKS-RL ADM8616YAKS-RL7 ADM8616WAKS-RL ADM8616WAKS-RL7 ADM8616VAKS-RL ADM8616VAKS-RL7 Reset Threshold (V) 4.63 4.63 4.38 4.38 3.08 3.08 2.93 2.93 2.63 2.63 2.32 2.32 2.19 2.19 1.67 1.67 1.58 1.58 4.63 4.63 4.38 4.38 3.08 3.08 2.93 2.93 2.63 2.63 2.32 2.32 2.19 2.19 1.67 1.67 1.58 1.58 Temperature Range -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C Quantity 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k Preliminary Technical Data Package Type SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 Branding N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0F N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G N0G Rev. PrB | Page 6 of 7 Preliminary Technical Data ORDERING GUIDE (ADM8617/ADM8618) Model ADM8617LACYKS-RL ADM8617LACYKS-RL7 ADM8617MACYKS-RL ADM8617MACYKS-RL7 ADM8617TACYKS-RL ADM8617TACYKS-RL7 ADM8617SACYKS-RL ADM8617SACYKS-RL7 ADM8617RACYKS-RL ADM8617RACYKS-RL7 ADM8617ZACYKS-RL ADM8617ZACYKS-RL7 ADM8617YACYKS-RL ADM8617YACYKS-RL7 ADM8617WACYKS-RL ADM8617WACYKS-RL7 ADM8617VACYKS-RL ADM8617VACYKS-RL7 ADM8618LACYKS-RL ADM8618LACYKS-RL7 ADM8618MACYKS-RL ADM8618MACYKS-RL7 ADM8618TACYKS-RL ADM8618TACYKS-RL7 ADM8618SACYKS-RL ADM8618SACYKS-RL7 ADM8618RACYKS-RL ADM8618RACYKS-RL7 ADM8618ZACYKS-RL ADM8618ZACYKS-RL7 ADM8618YACYKS-RL ADM8618YACYKS-RL7 ADM8618WACYKS-RL ADM8618WACYKS-RL7 ADM8618VACYKS-RL ADM8618VACYKS-RL7 Reset Threshold (V) 4.63 4.63 4.38 4.38 3.08 3.08 2.93 2.93 2.63 2.63 2.32 2.32 2.19 2.19 1.67 1.67 1.58 1.58 4.63 4.63 4.38 4.38 3.08 3.08 2.93 2.93 2.63 2.63 2.32 2.32 2.19 2.19 1.67 1.67 1.58 1.58 ADM8611/ADM8616/ADM8617/ADM8618 Temperature Range -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C Quantity 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k 10k 3k Package Type SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 SC70-4 Branding N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0H N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J N0J 1 Entries in bold type are standard models. Contact factory for availability of non-standard models. © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. Printed in the U.S.A. PR04795-0-3/04(PrA) Rev. PrA | Page 7 of 7