Impala Linear Corporation ILC803/ILC809/ILC810 Preliminary 3-Pin µP Voltage Monitor Package Features General Description The ILC803, ILC809 and ILC810 are low cost microprocessor supervisory circuits that assert a reset if the power supply drops below a designated threshold. Several different reset thresholds are available to accommodate systems operating at 3V, 3.3V or 5V. The ILC803 has an open drain output stage with active low RESET output The ILC809 has an active low RESET output, while the ILC810 offers an active high RESET output. The reset output is guaranteed to remain asserted for a minimum of 140ms after V CC has risen above the designated reset threshold. The ILC803, ILC809 and ILC810 are available in either a 3-Pin SOT-23 package or a 3-Pin SC-70 packages. • • • • • • • • Precision Voltage Monitor for 3V, 3.3V or 5V Power Supplies 6µA Supply Current 140ms Minimum Reset Pulse Width RESET Remains Valid with VCC as Low as 1.4V Active Low Manual Reset Input No External Components 3-Pin SOT-23 Package 3-Pin SC-70 package option Applications • • • • Critical Microprocessor Power Monitoring Portable Equipment Intelligent Instruments Computers & Printers, Controllers Typical Circuit VCC Ordering Information VCC VCC ILC803 ILC809 ILC810 µP RESET INPUT RESET (RESET) ( ) = ILC810 Part Package Temp. Range ILC803_U 3-Lead SOT-23 -40°C to +85°C ILC809_U 3-Lead SOT-23 -40°C to +85°C ILC810_U 3-Lead SOT-23 -40°C to +85°C ILC803_W 3-Lead SC-70 -40°C to +85°C ILC809_W 3-Lead SC-70 -40°C to +85°C ILC810_W 3-Lead SC-70 -40°C to +85°C Place the device suffix of the desired reset threshold voltage from the table [below] in the blank to complete the part number. Pin Package Configurations Top View GND 1 GND 1 ILC803 ILC809 RESET 3 2 RESET SC-70 Impala Linear Corporation ILC803/809/810 1.5 ILC810 VCC 3 VCC 2 Reset Threshold Voltage (V) 4.63 4.38 4.00 3.08 2.93 2.63 Device Suffix L M J T S R SOT-23 (408) 574-3939 www.impalalinear.com Sept 1999 1 3-Pin µP Voltage Monitor Preliminary Absolute Maximum Ratings Parameter Terminal Voltage Input Current Output Current Rate of Rise Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Power Dissipation (TA = +70°C) Symbol VCC VCC RESET, RESET VCC TA Ratings -0.3 to 6.0 20 20 100 -40 to +85 -65 to +150 300 320 Units V mA mA V/µs °C °C °C mW Stresses above those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent device failure. Functionality at or above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability. Operating ranges define those limits between which the functionality of the device is guaranteed. Electrical Characteristics VCC = 5V for ILC8__L/M/J, VCC = 3.3V for ILC8__S/T, VCC = 3V for ILC8__R, TA = Operating Temperature Range, unless otherwise noted. Parameter Conditions Min Typ Max Units Operating Voltage Range, VCC TA = 0°C to 70°C 1.4 5.5 V TA = -40°C to 85°C 1.6 5.5 Supply Current, ICC ILC803L/M/J, ILC809L/M/J, ILC810L/M/J 9 15 µA VCC < 3.6V, ILC803R/S/T, ILC809R/S/T, ILC810R/S/T 6 10 Reset Voltage Threshold, VTH ILC803L, ILC809L, ILC810L 4.50 4.63 4.75 V ILC803M, ILC809M, ILC810M 4.25 4.38 4.50 ILC803J, ILC809J, ILC810J 3.89 4.00 4.10 ILC803T, ILC809T, ILC810T 3.00 3.08 3.15 ILC803S, ILC809S, ILC810S 2.85 2.93 3.00 ILC803R, ILC809R, ILC810R 2.55 2.63 2.70 Reset Timeout Period, tR 140 240 560 ms RESET Output Voltage Low (Active low ILC803 & 809) VOL VCC = VTH VCC =VTH RESET Open Drain Output Leakage Current VCC > VTH RESET Deasserted RESET Output Voltage VOH ISOURCE = 800 µA, ILC809L/M/J ISOURCE = 500 µA, ILC809R/S/T VCC = VTH Min., ISINK = 3.2 mA, ILC809L/M/J VCC = VTH Min., ISINK = 1.2 mA, ILC809R/S/T VCC > 1.4 V, ISINK = 50 µA, TA = 0°C to 70°C VCC > 1.6 V, ISINK = 50 µA, TA = -40°C to 85°C 1.8V < VCC < VTH Min., ISOURCE = 150 µA ISINK = 3.2mA, ILC810L/M/J ISINK = 1.2mA, ILC810R/S/T RESET Output Voltage, VOL RESET Output Voltage, VOH RESET Output Voltage, VOL ISINK = 1.2mA ISINK = 3.2mA 0.3 0.4 V V 7 µA VCC – 1.5 0.8 x VCC V 0.4 0.3 0.3 0.3 0.8 x VCC 0.4 0.3 V V V Pin Functions Pin Name GND RESET RESET ILC803 1 2 N/A N/A 2 4 3 3 VCC Impala Linear Corporation ILC803/809/810 1.5 Pin Number ILC809 ILC810 1 1 2 N/A Description Ground Pin. RESET goes low if VCC falls below the reset threshold and remains asserted for one reset timeout period (140ms min.) after VCC exceeds the reset threshold. RESET goes high if VCC falls below the reset threshold and remains asserted for one reset timeout period (140ms min.) after VCC exceeds the reset threshold. Power supply input, 3 V, 3.3 V or 5 V. (408) 574-3939 www.impalalinear.com Sept 1999 2 3-Pin µP Voltage Monitor Preliminary Circuit Description Microprocessor Reset The RESET pin is asserted whenever VCC falls below the reset threshold voltage. The reset pin remains asserted for a period of 240ms after VCC has risen above the reset threshold voltage. The reset function ensures the microprocessor is properly reset and powers up into a known condition after a power failure. RESET will remain valid with VCC as low as 1.4V. VCC 3 Reset Threshold (V) RESET (ILC803, ILC809 Reset Generator 2 RESET (ILC810) 1 GND Figure 3: Block Diagram VTH VCC + - Alternate Source Cross Reference Guide tR Industry P/N tR RESET Figure 1: Timing Diagram VCC Transients The ILC803, ILC809 and ILC810 are relatively immune to negative-going VCC glitches below the reset threshold. Typically, a negative-going transient 125mV below the reset threshold with a duration of 50µs (25µs for ILC8__R/S/T) or less will not cause an unwanted reset. Interfacing to Bi-directional Reset Pins The ILC803/ILC809/ILC810 can interface with µPs with bidirectional reset pins by connecting a 4.7kΩ resistor in series with the ILC803/ILC809/ILC810 output and the mP reset pin. ILC803 connects directly with a single pull-up resistor (figure 2). RESET Valid to 0V A resistor can be added from the RESET pin to ground to ensure the RESET output remains low with VCC down to 0V. A 100kΩ resistor connected from RESET to ground is recommended. The size of the resistor should be large enough to not load the RESET output and small enough to pull-down any stray leakage currents. VCC VCC 100K ILC803 only VCC ILC803 ILC809 µP RESET RESET 100K ILC809 only Figure 2: Reset valid to VCC Impala Linear Corporation ILC803/809/810 1.5 (408) 574-3939 MAX803XYUR-T MAX809JEUR-T MAX809LEUR-T MAX809MEUR-T MAX809REUR-T MAX809SEUR-T MAX809TEUR-T MAX810JEUR-T MAX810LEUR-T MAX810MEUR-T MAX810REUR-T MAX810SEUR-T MAX810TEUR-T ILC Direct Replacement ILC803YU ILC809JU ILC809LU ILC809MU ILC809RU ILC809SU ILC809TU ILC810JU ILC810LU ILC810MU ILC810RU ILC810SU ILC810TU Device Markings Information ILC803J ILC803L ILC803M ILC803R ILC803S ILC803T ILC809J ILC809L ILC809M ILC809R ILC809S ILC809T ILC810J ILC810L ILC810M ILC810R ILC810S ILC810T SC-70 Case QJY QLY QMY QRY QSY QTY VJY VLY VMY VRY VSY VTY ZJY ZCY ZMY ZRY ZSY ZTY Y-LOT CODE www.impalalinear.com SOT-23 Case QJYY QLYY QMYY QRYY QSYY QTYY VJYY VLYY VMYY VRYY VSYY VTYY ZJYY ZCYY ZMYY ZRYY ZSYY ZTYY YY-LOT CODE Sept 1999 3 3-Pin µP Voltage Monitor Preliminary Packaging Information U Package, 3-Pin SOT-23 Dimensions are in inches 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 W Package, 3-Pin SC-70 0-8° 0.010 0.005 0.004 0.001 Dimensions are in inches .087 .071 .053 .045 .087 .079 .009 .005 .043 .032 .004 .010 .004 .016 .012 .026 .018 .006 .051 Impala Linear Corporation ILC803/809/810 1.5 (408) 574-3939 www.impalalinear.com Sept 1999 4 3-Pin µP Voltage Monitor Preliminary Tape and Reel Information Diagram applies to SOT-23 and SC-70 4.0 ± 0.1 2.0 ± 0.05 O1.5 ± 0.1 1.75 ± 0.1 3.5 ± 0.05 8.0 ± 0.3 O1.1 ± 0.1 4.0 ± 0.1 2.7 ± 0.1 Dimensions are in millimeters 1.2 ± 0.1 3.1 ± 0.1 Devices sold by Impala Linear Corporation are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Impala Linear Corporation makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Impala Linear Corporation makes no warranty of merchantability or fitness for any purpose. Impala Linear Corporation reserves the right to discontinue production and change specifications and prices at any time and without notice. This product is intended for use in normal commercial applications. Applications requiring an extended temperature range, unusual environmental requirements, or high reliability applications, such as military and aerospace, are specifically not recommended without additional processing by Impala Linear Corporation. Life Support Policy Impala Linear Corporation’s products are not authorized for use as critical components in life support devices or systems. 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 labelling, can be reasonably expected to result in a significant injury to the user. 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. Impala Linear Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an Impala Linear Corporation product. No other circuits, patents, licenses are implied. Impala Linear Corporation ILC803/809/810 1.5 (408) 574-3939 www.impalalinear.com Sept 1999 5