FM803 3-Pin µC Supervisor Device General Description Features The FM803 is a supervisory device designed to monitor power supply or other system voltage. FM803 generates a reset pulse whenever the voltage being monitored is out of tolerance. Once asserted, the reset pulse is guaranteed to be valid for a minimum of 140ms (256ms typical ). The reset output of FM803 is of active low Open-Drain type and has an internal pull-up resistor. ■ Automatic reset generation on power-up ■ Minimum 140 ms reset pulse ■ Internal 5kΩ pull-up resistor ■ Other reset pulse choices available: 32 - 256 ms ■ Operating temperature -40°C to + 105°C (SOT-23) -40°C to +85°C (SC70) Several threshold voltages are offered to accommodate 5.0V, 3.3V, 3.0V and 2.7V system voltages. ■ Choice of Reset Thresholds: 4.63V, 4.38V, 4.00V, 3.08V, 2.93V, 2.63V These devices are offered in space saving 3-pin SOT23 and SC70 packages. ■ SOT23-3 and SC70-3 Packages Typical Operating Circuit VCC 3 Controller FM803 1 2 /RESET GND Connection Diagram GND 1 FM803 3 VCC /RESET 2 SC70-3 & SOT23-3 Packages © 2000 Fairchild Semiconductor International FM803 Rev. C.3 1 www.fairchildsemi.com FM803 3-Pin µC Supervisor Device October 2002 Rate of Rise of VCC 100V/µs Voltage on any terminal relative to GND VCC /RESET Continuous Power Dissipation (TA = +70°C) SOT23-3 (derate 4mW/°C above +70°C) 320mW -0.3V to +6.0V -0.3V to +6.0V Operating Temperature Range -40°C to +105°C Input Current 20mA Storage Temperature Range -65°C to +150°C Output Current: /RESET 20mA Lead Temperature (soldering, 10s) +300°C These are stress ratings only, and functional operation is not implied for these levels or beyond. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Electrical Characteristics SOT-23 Package (TA = 25°C unless otherwise noted) VCC = full range, as noted under conditions. See Note 1. Parameter Symbol Conditions Operating Voltage VCC TA = -40°C to +105°C Supply Current ICC TA = -40°C to +105°C, VCC < 5.5V FM803J/L/M TA = -40°C to +105°C, VCC < 3.6V FM803R/S/T Reset Threshold VTH Min Typ (Note 2) 1.1 µA 3 6 TA = -40°C to +105°C 4.40 4.63 4.86 4.18 4.38 4.52 FM803J TA = -40°C to +105°C 3.90 4.00 4.18 FM803T TA = -40°C to +105°C 2.97 3.08 3.19 FM803S TA = -40°C to +105°C 2.79 2.93 3.00 FM803R TA = -40°C to +105°C 2.49 2.63 2.70 Reset Active Timout Period TA = -40°C to +105°C Open-Drain Output Leakage Current V 10 TA = -40°C to +105°C VCC = VTH to (VTH - 100mV) VOL 5.5 FM803M VCC to Reset Delay 140 VCC = VTH(min), ISINK = 1.2mA, FM803R/S/T VCC = VTH(min), ISINK = 3.2mA, FM803J/L/M VCC = < 1.0V, ISINK = 50µA VCC > VTH(max), IRESET = 1 Units 5 FM803L Reset Threshold Tempco FM803 Output Low Max V 30 ppm/°C 10 µs 256 560 ms 0.3 V 0.4 0.3 0.8VCC 1 µA Note 1: Testing in production is 25°C only. Limits over temperature are guaranteed by design. Note 2: Typical values are at 25°C. Note 3: Recommended minimum slew rate for the VCC rampup is 200mV/sec in the 0 to 2V range for the device to function properly. 2 FM803 Rev. C.3 www.fairchildsemi.com FM803 3-Pin µC Supervisor Device Absolute Maximum Ratings Rate of Rise of VCC 100V/µs Voltage on any terminal relative to GND VCC -0.3V to +6.0V /RESET -0.3V to (VCC + 0.3V) Continuous Power Dissipation (TA = +70°C) SC70-3 174mW Input Current 20mA Storage Temperature Range Output Current: /RESET 20mA Operating Temperature Range -40°C to +85°C -65°C to +150°C Lead Temperature (soldering, 10s) +300°C These are stress ratings only, and functional operation is not implied for these levels or beyond. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Electrical Characteristics SC70 Package (TA = 25°C unless otherwise noted) VCC = full range, as noted under conditions. See Note 1. Parameter Symbol Conditions Operating Voltage VCC TA = 0°C to +70°C TA = -40°C to +85°C Supply Current ICC TA = -40°C to +85°C, VCC < 5.5V FM803J/L/M TA = -40°C to +85°C, VCC < 3.6V FM803R/S/T Reset Threshold VTH Min 5.5 5.5 V 9 15 µA 6 10 TA = -40°C to +85°C 4.40 4.63 4.86 FM803M TA = -40°C to +85°C 4.18 4.38 4.52 FM803J TA = -40°C to +85°C 3.90 4.00 4.18 FM803T TA = -40°C to +85°C 2.97 3.08 3.19 FM803S TA = -40°C to +85°C 2.79 2.93 3.00 FM803R TA = -40°C to +85°C 2.49 2.63 2.70 VCC = VTH to (VTH - 100mV) Reset Active Timout Period TA = -40°C to +85°C Open-Drain Output Leakage Current Units FM803L VCC to Reset Delay (Note 2) VOL Max 1.4 1.6 Reset Threshold Tempco FM803 Output Low Typ (Note 2) 140 VCC = VTH(min), ISINK = 1.2mA, FM803R/S/T VCC = VTH(min), ISINK = 3.2mA, FM803J/L/M VCC = < 1.0V, ISINK = 50µA VCC > VTH(max), /RESET = 1 V 30 ppm/°C 10 µs 256 560 ms 0.35 V 0.4 0.3 7 µA Note 1: Testing in production is 25°C only. VCC = 5V for FM803L/M/J, VCC = 3.3V for FM803T/S and VCC = 3V for FM803R. Limits over temperature are guaranteed by design. Note 2 Typical values are at 25°C. 3 FM803 Rev. C.3 www.fairchildsemi.com FM803 3-Pin µC Supervisor Device Absolute Maximum Ratings FM803 3-Pin µC Supervisor Device Pin Descriptions Pin Number Name 1 GND 2 /RESET 3 VCC Function GROUND /RESET remains LOW while VCC is below VTH, and for at least 140ms after VCC rises above VTH. Circuit Timing (Ex: FM803) VCC 3.3V VTH 1V GND RESET 3.3V VTH 1V GND 140ms (min) When operating properly with 5V VCC (for example), /RESET will also be about 5V. When VCC starts to fall, /RESET will follow it down as shown. When VCC drops below VTH, /RESET drops to ground (“issues a RESET”) and stays there unless VCC also falls below its minimum operating voltage, approx. 1V. At this point, the supervisor loses control, and its output may rise, only to again follow VCC down to the ground. When VCC begins to rise, /RESET follows it until 1.0V or so is reached, whereupon the device regains control, /RESET is pulled to ground, etc. When VCC rises above VTH, /RESET comes out of RESET 140 ms later. If it is required that a lower value than GND + 1.0V is needed on RESET signal during VCC ≤ 1V, a 100K resistor may be used on the device output to GND. 4 FM803 Rev. C.3 www.fairchildsemi.com Part Number Top Marking RESET Threshold (V) Output Type Package Type Packing Method FM803LS3X 03L 4.63 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R FM803MS3X 03M 4.38 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R FM803JS3X 03J 4.00 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R FM803TS3X 03T 3.08 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R FM803SS3X 03S 2.93 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R FM803RS3X 03R 2.63 Open-Drain, active LOW 3-Pin, SOT23 3000 units in T&R FM803LP3X QLY 4.63 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R FM803MP3X QMY 4.38 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R FM803JP3X QJY 4.00 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R FM803TP3X QTY 3.08 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R FM803SP3X QSY 2.93 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R FM803RP3X QRY 2.63 Open-Drain, active LOW 3-Pin, SC70 3000 units in T&R Note 4: Devices listed above feature 250ms typical Reset Pulse width. Consult Fairchild sales for other reset pulse width options. 5 FM803 Rev. C.3 www.fairchildsemi.com FM803 3-Pin µC Supervisor Device Ordering Information FM803 3-Pin µC Supervisor Device Physical Dimensions inches (millimeters) unless otherwise noted 0.021 0.015 0.055 0.047 0.098 0.083 0.120 0.105 0.0059 0.0035 0.040 0.031 0.079 0.071 0-8˚ 0.010 0.005 0.004 0.001 0.76 2.29 PKG CL 0.76 0.95 LAND PATTERN RECOMMENDATION SOT-23 Package Dimensions FS Pkg Code AU 6 FM803 Rev. C.3 www.fairchildsemi.com FM803 3-Pin µC Supervisor Device Physical Dimensions inches (millimeters) unless otherwise noted .087 (2.2) .071 (1.8) .053 (1.35) .045 (1.15) .087 (2.2) .079 (2.0) .009 (.23) .005 (.13) .043 (1.1) .032 (.80) .004 (.10) .010 (.25) .004 (.10) .016 (.40) .012 (.30) .026 (.65) .018 (.45) .006 (.15) .052 (1.3) 0.65 1.80 0.65 0.6 0.5 Land Pattern Recommendation SC70 Package Dimensions Life Support Policy Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written approval of the President of Fairchild Semiconductor Corporation. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. Fairchild Semiconductor Americas Customer Response Center Tel. 1-888-522-5372 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Fairchild Semiconductor Europe Fax: +44 (0) 1793-856858 Deutsch Tel: +49 (0) 8141-6102-0 English Tel: +44 (0) 1793-856856 Français Tel: +33 (0) 1-6930-3696 Italiano Tel: +39 (0) 2-249111-1 Fairchild Semiconductor Hong Kong 8/F, Room 808, Empire Centre 68 Mody Road, Tsimshatsui East Kowloon. Hong Kong Tel; +852-2722-8338 Fax: +852-2722-8383 Fairchild Semiconductor Japan Ltd. 4F, Natsume Bldg. 2-18-6, Yushima, Bunkyo-ku Tokyo, 113-0034 Japan Tel: 81-3-3818-8840 Fax: 81-3-3818-8841 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. 7 FM803 Rev. C.3 www.fairchildsemi.com