R V6309 V6319 EM MICROELECTRONIC - MARIN SA 3-Pin Microprocessor Reset Circuit Description Features The V6309 and V6319 are microprocessor supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V powered or 3V powered circuits. ! Precision monitoring of 3V, 3.3V and 5V power supply voltages ! Fully specified over the temperature range of -40 to +125°C ! 140ms minimum power-on reset pulse width: RESET output for V6309 RESET output for V6319 ! 16 µA supply current ! Guaranteed RESET/RESET valid to VDD = 1V ! Power supply transient immunity ! No external components needed ! 3-pin SOT23 package ! Fully compatible with MAX809/MAX810 These circuits perform a single function: they assert a reset signal whenever the VDD supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after VDD has risen above the reset threshold. The only difference between the two devices is that the V6309 has an active-low RESET output (which is guaranteed to be in the correct state for VDD down to 1V), while the V6319 has an activehigh RESET output. The reset comparator is designed to ignore fast transients on VDD. Reset thresholds suitable for operation with a variety of supply voltages are available. Low supply current makes the V6309/V6319 ideal for use in portable equipment. The V6309/V6319 come in a 3-pin SOT23 package. Applications ! ! ! ! ! Computer Controllers Intelligent instruments Critical µP and µC power monitoring Portable/battery-powered equipment Pin Assignment Typical Operating Configuration SOT23-3L VDD VDD VDD V6309 RES VSS VDD 3 Microprocessor RES V6309/19 1 2 VSS RES / RES VSS Fig. 1 Fig. 2 Pin Description Pin 1 2 Name VSS for V6309 RESET Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.G 1 2 for V6319 RESET 3 VDD Function Ground RESET Output remains low while VDD is below the reset threshold and rises for 240ms after VDD above the reset threshold RESET Output remains high while VDD is below the reset threshold and rises for 240ms after VDD above the reset threshold Supply voltage (+5V, +3.3V or +3.0V) Table 1 www.emmicroelectronic.com V6309 V6319 R Absolute Maximum Ratings Parameter Terminal voltage to VSS Min. voltage at RESET or Symbol Conditions VDD -0.3V to + 6.0V RESET Maximum voltage at RESET or RESET Input current at VDD Output current at RESET or RESET Rate of rise at VDD Continuous power dissipation at TA = +70°C for SOT-23 (>70°C derate by 4 mW/°C) Operating temperature range Storage temperature range Vmin -0.3V Vmax VCC + 0.3V Imin 20 mA Imax 20 mA tR 100Vµs Pmax 320 mW TA TST -40 to +125°C -65°C to +150°C Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Handling Procedures This device has built-in protection against high static voltages or electric fields; however, it is advised that normal precautions be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Table 2 Electrical Characteristics VDD = full range, TA = -40 to +125°C, unless otherwise specified, typical values at TA = +25°C, VDD = 5V for versions L and M, VDD = 3.3V for versions T and S, VDD = 3 V for R. (Production testing done at TA = +25°C and 85°C, over temperature limits guaranteed by design only) Parameter VDD range Supply current versions L, M versions R, S, T 1) RESET threshold version L Symbol VDD ICC VDD < 5.5V VDD < 3.6V VTH TA = +25°C TA = -40 to +125°C TA = +25°C TA = -40 to +125°C TA = +25°C TA = -40 to +125°C TA = +25°C TA = -40 to +125°C TA = +25°C TA = -40 to +125°C version M version T version S version R Reset threshold temp. coefficient 1) VDD to reset delay Reset active timeout period RESET output voltage low for V6309 versions R, S, T versions L, M RESET output voltage high for V6309 versions R, S, T versions L, M RESET output voltage low for V6319 versions R, S, T versions L, M RESET output voltage high for V6319 Test Conditions TA = 0 to +70°C TA = -40 to +105C TA = -40 to +125°C VDD = VTH to (VTH – 100mV) TA = -40 to °125°C VOL VDD > 1.0V, ISINK = 50µA VDD = VTH min., ISINK = 1.2mA VDD = VTH min., ISINK = 3.2mA VOH VDD = VTH max., ISOURCE = 500µA VDD = VTH max., ISOURCE = 800µA VOL VDD = VTH max., ISINK = 1.2mA VDD = VTH max., ISINK = 3.2mA 1.8V < VDD < VTH min., ISOURCE = 150µA VOH Min. 1.0 1.2 1.6 4.56 4.40 4.31 4.16 3.04 2.92 2.89 2.78 2.59 2.50 140 Typ. Max. 5.5 5.5 5.5 Unit V V V 26 16 60 50 µA µA 4.63 4.70 4.79 4.45 4.53 3.11 3.17 2.96 3.02 2.66 2.72 590 V V V V V V V V V V ppm/°C µs ms 0.3 0.3 0.4 V V V 4.38 3.08 2.93 2.63 -200 7 330 0.8 VDD VDD-1.5V V V 0.3 0.4 0.8 VDD V V V Table 3 1) RESET output for V6309 , RESET output for V6319 Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.G 2 www.emmicroelectronic.com V6309 V6319 R Supply Current vs Temperature No load, V63xxR/S/T Power-Down Reset Delay vs Temperature V63xxR/S/T Fig. 6 Fig. 3 Power-Down Reset Delay vs Temperature V63xxL/M Supply Current vs Temperature No load, V63xxL/M Fig. 7 Fig. 4 Normalized Reset Threshold vs Temperature All versions Power-Up Reset Timeout vs Temperature All versions Fig. 8 Fig. 5 Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.G 3 www.emmicroelectronic.com V6309 V6319 R RESET Valid for VDD = Ground Circuit Application Information Negative-Going VDD Transients In addition to issuing a reset to the microprocessor during power-up, power-down and brownout conditions, the V6309/V6319 are relatively immune to short duration negative-doing VDD transients (glitches). Fig. 8 shows typical transient duration vs. Reset comparator overdrive, for which the V6309/V6319 do not generate a reset pulse. The graph was generated using a negative-going pulse applied to VDD, starting 0.5V above the actual reset threshold and ending below it by the magnitude indicated (reset comparator overdrive). The graph indicates the maximum pulse width a negative-going VDD transient can have without causing a reset pulse. As the magnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, for the V6309L and V6319M, a VDD transient that goes 100V below the reset threshold and lasts 20µs or less will not cause a reset pulse. A 0.1µF bypass capacitor mounted as close as possible to the VDD pin provides additional transient immunity. VDD RES V6309 100 kΩ VSS Fig. 10 Interfacing to µPs with Bidirectional Reset Pins Microprocessors with bidirectional reset pins (such as the Motorola 68HC11 series) can connect to the V6309 reset output. If, for example, the V6309 RESET output is asserted high and the µP wants to pull it low, indeterminate logic levels may result. To correct this, connect a 4.7 kΩ resistor between the V6309 RESET and the µP reset I/O (Fig. 11). Buffer the V6309 RESET output to other system components. Max. Transient Duration without causing a Reset Pulse versus Reset Comparator Overdrive Interfacing to µPs with Bidirectional Reset I/O Buffer RES to other system components Buffer VDD VDD RES RES V6309 Fig .9 VSS Ensuring a Valid Reset Output down to VDD = 0V When VDD falls below 1V, the V6309 RESET output no longer sinks current, it becomes an open circuit. Therefore, high-impedance CMOS logic inputs connected to RESET can drift to undetermined voltages. This presents no problem in most applications, since most µP and other circuitry is inoperative with VDD below 1V. However, in applications where RESET must be valid down to 0V, adding a pull-down resistor to RESET causes any stray leakage currents to flow to ground, holding RESET low (Fig. 10). R1's value is not critical; 100 kΩ is large enough not to load RESET and small enough to pull RESET to ground. A 100 kΩ pull-up resistor to VDD is also recommended for the V6319, if RESET is required to remain valid for VDD < 1V. Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.G 4.7 kO 4.7kΩ µP VSS Fig. 11 Benefits of Highly Accurate Reset Threshold Most µP supervisor ICs have reset threshold voltages between 5% and 10% below the value of nominal supply voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10% below nominal. When using ICs rated at only the nominal supply ±5%, this leaves a zone of uncertainty where the supply is between 5% and 10% low, and where the reset may or may not be asserted. The V6209/T and V6319/T use highly accurate circuitry to ensure that reset is asserted close to the 5% limit, and long before the supply has declined to 10% below nominal. 4 www.emmicroelectronic.com V6309 V6319 R Packaging and Ordering Information Dimensions of SOT23-3L Package D E SOT23-3L C A1 A2 A B L H e SYMBOL A A1 A2 B C D E e e1 H L e1 MIN 0.89 0.013 0.95 0.37 0.085 2.80 1.20 1.78 2.10 TYP MAX 1.04 1.12 0.10 0.97 1.00 0.51 0.12 0.18 2.95 3.04 1.32 1.40 0.95 1.90 2.05 2.40 2.64 0.55 Dimensions are in mm Ordering Information When ordering, please always specify the complete Part Number. Please contact EM Microelectronic for availability. Part Number V6309RSP3B V6309RSP3B+ V6309SSP3B V6309SSP3B+ V6309TSP3B V6309TSP3B+ V6309MSP3B V6309MSP3B+ V6309LSP3B V6309LSP3B+ V6319RSP3B V6319SSP3B V6319TSP3B V6319MSP3B V6319MSP3B+ V6319LSP3B 1) 2) 3) Threshold Voltage 2.63V 2.63V 2.93V 2.93V 3.08V 3.08V 4.38V 4.38V 4.63V 4.63V 2.63V 2.93V 3.08V 4.38V 4.38V 4.63V Output Type Active low push-pull Package & Delivery Form SOT23-3L, Tape & Reel 3000 pces Top Marking 1) EK## AT## BT## EF## E9## E6## Active high push-pull SOT23-3L, Tape & Reel 3000 pces P0## E5## Top Marking 2) with 4 Characters AEAR BEAR AEAS BEAS AEAT BEAT AEAM BEAM AEAL BEAL AFAR AFAS AFAT AFAM BFAM AFAL Top Marking 3) with 3 Characters ER# ES# ET# EM# EL# FR# FS# FT# FM# FL# Top marking is the standard from 2006. No bottom marking exists. Where ## refers to the lot number (EM internal reference only) Top marking with 4 characters is standard from 2003. For lead-free/green mold (RoHS) parts, the first letter of top marking with 4 characters begins with letter “B” instead of letter “A”. Bottom marking indicates the lot number. Top marking with 3 characters is kept as information since it was used until 2002. Where # refers to the lot number (EM internal reference only) Traceability for Small Packages Due to the limited space on the package surface, the bottom marking contains a limited number of characters that provide only partial information for lot traceability. Full information for complete traceability is however provided on the packing labels of the product at delivery from EM. It is highly recommended that the customer insures full lot traceability of EM product in his final product. Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.G 5 www.emmicroelectronic.com V6309 V6319 R Samples Part Number Part Number V6309LSP3B+ V6319TSP3B V6309MSP3B+ V6319MSP3B+ V6309RSP3B+ V6309SSP3B+ V6309TSP3B+ Sample stock is generally held on versions list above. Please contact factory for other versions not shown here. EM Microelectronic-Marin SA (EM) makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in EM's General Terms of Sale located on the Company's web site. EM assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for use as components in life support devices or systems. Copyright © 2006, EM Microelectronic-Marin SA 03/06 – rev.G 6 www.emmicroelectronic.com