MAX809 Series, MAX810 Series Very Low Supply Current 3-Pin Microprocessor Reset Monitors The MAX809 and MAX810 are cost–effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 10 µsec of VCC falling through the reset voltage threshold. Reset is maintained active for a minimum of 140 msec after VCC rises above the reset threshold. The MAX810 has an active–high RESET output while the MAX809 has an active–low RESET output. The output of the MAX809 is guaranteed valid down to VCC = 1.0 V. Both devices are available in a SOT–23 package. The MAX809/810 are optimized to reject fast transient glitches on the VCC line. Low supply current of 1.0 µA (VCC = 3.2 V) makes these devices suitable for battery powered applications. http://onsemi.com MARKING DIAGRAM 3 3 SOT–23 (TO–236) CASE 318 1 xxxM xxYW 1 2 2 xx, xxx = Specific Device Code M, YW = Date Code PIN CONFIGURATION Features • Precision VCC Monitor for 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies • Precision Monitoring Voltages from 1.6 V to 4.9 V Available • • • • • • • in 100 mV Steps 140 msec Guaranteed Minimum RESET Output Duration RESET Output Guaranteed to VCC = 1.0 V Low Supply Current VCC Transient Immunity Small SOT–23 Package No External Components Wide Operating Temperature: –40°C to 105°C GND 1 3 RESET** (RESET)*** VCC 2 SOT–23* (Top View) NOTE: * SOT–23 is equivalent to JEDEC (TO–236) ** RESET is for MAX809 *** RESET is for MAX810 Typical Applications • • • • Computers Embedded Systems Battery Powered Equipment Critical µP Power Supply Monitoring ORDERING INFORMATION Device VCC VCC MAX809/810 RESET RESET VCC PROCESSOR Package Shipping MAX809xTR SOT–23 3000 Tape/Reel MAX809SNxxxT1 SOT–23 3000 Tape/Reel MAX810xTR SOT–23 3000 Tape/Reel NOTE: The “x” and “xxx” denotes a suffix for Vcc voltage threshold options – see page 8 for more details. RESET INPUT DEVICE MARKING INFORMATION GND GND See general marking information in the device marking section on page 8 of this data sheet. Figure 1. Typical Application Diagram Semiconductor Components Industries, LLC, 2001 June, 2001 – Rev. 3 1 Publication Order Number: MAX809S/D MAX809 Series, MAX810 Series PIN DESCRIPTION ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Pin No. Symbol Description 1 GND 2 RESET (MAX809) RESET output remains low while VCC is below the reset voltage threshold, and for 240 msec (typ.) after VCC rises above reset threshold 2 RESET (MAX810) RESET output remains high while VCC is below the reset voltage threshold, and for 240 msec (typ.) after VCC rises above reset threshold 3 VCC Ground Supply Voltage (typ.) ABSOLUTE MAXIMUM RATINGS* (Note 1) Rating Symbol Value Unit VCC 6.0 V –0.3 to (VCC + 0.3) V Input Current, VCC 20 mA Output Current, RESET 20 mA dV/dt (VCC) 100 V/µsec RJA 491 °C/W Operating Temperature Range (Data given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V) TA –40 to +105 °C Operating Temperature Range (Data given for MAX809 threshold levels: 2.63 V, 3.08 V, 4.00 V and 4.38 V; MAX810 threshold levels: 2.63 V, 2.93 V, 3.08 V, 4.38 V and 4.63 V) TA –40 to +85 °C Storage Temperature Range Tstg –65 to +150 °C Tsol +260 Supply Voltage (VCC to GND) RESET Thermal Resistance, Junction to Air Lead Temperature (Soldering, 10 Seconds) Latch–up performance: °C ILatch–up mA 200 200 Positive Negative *Maximum Ratings are those values beyond which damage to the device may occur. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL–STD–883, Method 3015. Machine Model Method 350 V. 2. The maximum package power dissipation limit must not be exceeded. TJ(max) TA with TJ(max) = 150°C PD RJA ELECTRICAL CHARACTERISTICS TA = –40°C to +105°C unless otherwise noted. Typical values are at TA = +25°C. (Note 1.) The following data is given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V. Characteristic Symbol VCC Range TA = 0°C to +70°C TA = –40°C to +105°C Min Typ Max 1.0 1.2 – – 5.5 5.5 Unit V Supply Current VCC = 3.3 V TA = –40°C to +85°C TA = 85°C to +105°C VCC = 5.5 V TA = –40°C to +85°C TA = 85°C to +105°C µA ICC 1. Production testing done at TA = 25°C, over temperature limits guaranteed by design. http://onsemi.com 2 – – 0.5 – 1.2 2.0 – – 0.8 – 1.8 2.5 MAX809 Series, MAX810 Series ELECTRICAL CHARACTERISTICS (continued) TA = –40°C to +105°C unless otherwise noted. Typical values are at TA = +25°C. (Note 2.) The following data is given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V. Characteristic Symbol Reset Threshold (Note 3.) Min Typ Max VTH Unit V MAX809SN490 TA = +25°C TA = –40°C to +85°C TA = +85°C to +105°C 4.83 4.78 4.66 4.9 – – 4.97 5.02 5.14 MAX809LTR TA = +25°C TA = –40°C to +85°C TA = +85°C to +105°C 4.56 4.50 4.40 4.63 – – 4.70 4.75 4.86 MAX809STR TA = +25°C TA = –40°C to +85°C TA = +85°C to +105°C 2.89 2.85 2.78 2.93 – – 2.96 3.00 3.08 MAX809SN232 TA = +25°C TA = –40°C to +85°C TA = +85°C to +105°C 2.28 2.25 2.21 2.32 – – 2.35 2.38 2.45 MAX809SN160 TA = +25°C TA = –40°C to +85°C TA = +85°C to +105°C 1.58 1.56 1.52 1.6 – – 1.62 1.64 1.68 Reset Temperature Coefficient – 30 – ppm/°C VCC to Reset Delay VCC = VTH to (VTH – 100 mV) – 10 – µsec 140 240 460 msec Reset Active Timeout Period RESET Output Voltage Low VCC = VTH – 0.2 V 1.6 V VTH 2.0 V, ISINK = 0.5 mA 2.1 V VTH 4.0 V, ISINK = 1.2 mA 4.1 V VTH 4.9 V, ISINK = 3.2 mA VOL – – 0.3 V RESET Output Voltage High VCC = VTH + 0.2 V 1.6 V VTH 2.4 V, ISOURCE = 200 µA 2.5 V VTH 4.9 V, ISOURCE = 500 µA VOH 0.8 VCC – – V 2. Production testing done at TA = 25°C, over temperature limits guaranteed by design. 3. Contact your ON Semiconductor sales representative for other threshold voltage options. http://onsemi.com 3 MAX809 Series, MAX810 Series ELECTRICAL CHARACTERISTICS (VCC = Full Range, TA = –40°C to +85°C unless otherwise noted. Typical values are at TA = +25°C, VCC = 5.0 V for L/M/J, 3.3 V for T/S, 3.0 V for R) (Note 4.) The following data is given for MAX809 threshold levels: 2.63 V, 3.08 V, 4.00 V and 4.38 V; MAX810 threshold levels: 2.63 V, 2.93 V, 3.08 V, 4.38 V and 4.63 V. Characteristic Symbol Min Typ Max 1.0 1.2 – – 5.5 5.5 – – 24 17 60 50 4.56 4.50 4.31 4.25 3.93 3.89 3.04 3.00 2.89 2.85 2.59 2.55 4.63 – 4.38 – 4.00 – 3.08 – 2.93 – 2.63 – 4.70 4.75 4.45 4.50 4.06 4.10 3.11 3.15 2.96 3.00 2.66 2.70 Reset Threshold Temperature Coefficient – 30 – ppm/°C VCC to Reset Delay VCC = VTH to (VTH – 100 mV) – 20 – µsec 140 240 560 msec – – – – – – 0.3 0.4 0.3 0.8 VCC VCC – 1.5 – – – – – – – – 0.3 0.4 0.8 VCC – – VCC Range TA = 0°C to +70°C TA = –40°C to +85°C Unit V Supply Current MAX8xxM/MAX809J/MAX810L: VCC < 5.5 V MAX8xxR/T/MAX810S: VCC < 3.6 V ICC Reset Threshold (Note 4.) MAX810L: TA = 25°C TA = –40°C to +85°C MAX8xxM: TA = 25°C TA = –40°C to +85°C MAX809J: TA = 25°C TA = –40°C to +85°C MAX8xxT: TA = 25°C TA = –40°C to +85°C MAX810S: TA = 25°C TA = –40°C to +85°C MAX8xxR: TA = 25°C TA = –40°C to +85°C VTH Reset Active Timeout Period RESET Output Voltage Low (MAX809) MAX809R/T: VCC = VTH min, ISINK = 1.2 mA MAX809M/J: VCC = VTH min, ISINK = 3.2 mA VCC > 1.0 V, ISINK = 50 µA VOL RESET Output Voltage High (MAX809) MAX809R/T: VCC > VTH max, ISOURCE = 500 µA MAX809M/J: VCC > VTH max, ISOURCE = 800 µA VOH RESET Output Voltage Low (MAX810) MAX810R/S/T: VCC = VTH max, ISINK = 1.2 mA MAX810L/M: VCC = VTH max, ISINK = 3.2 mA VOL RESET Output Voltage High (MAX810) 1.8 < VCC < VTH min, ISOURCE = 150 µA VOH 4. Production testing done at TA = 25°C, over temperature limits guaranteed by design. http://onsemi.com 4 µA V V V V V MAX809 Series, MAX810 Series APPLICATIONS INFORMATION VCC Transient Rejection valid to VCC = 0 V, a pull–down resistor must be connected from RESET to ground to discharge stray capacitances and hold the output low (Figure 3). This resistor value, though not critical, should be chosen such that it does not appreciably load RESET under normal operation (100 k will be suitable for most applications). The MAX809 provides accurate VCC monitoring and reset timing during power–up, power–down, and brownout/sag conditions, and rejects negative–going transients (glitches) on the power supply line. Figure 2 shows the maximum transient duration vs. maximum negative excursion (overdrive) for glitch rejection. Any combination of duration and overdrive which lies under the curve will not generate a reset signal. Combinations above the curve are detected as a brownout or power–down. Typically, transient that goes 100 mV below the reset threshold and lasts 5 µs or less will not cause a reset pulse. Transient immunity can be improved by adding a capacitor in close proximity to the VCC pin of the MAX809. VCC VCC MAX809/810 RESET RESET VCC R1 100 k GND VTH Overdrive Figure 3. Ensuring RESET Valid to VCC = 0 V Processors With Bidirectional I/O Pins MAXIMUM TRANSIENT DURATION (µsec) Duration Some µP’s (such as Motorola 68HC11) have bi–directional reset pins. Depending on the current drive capability of the processor pin, an indeterminate logic level may result if there is a logic conflict. This can be avoided by adding a 4.7 k resistor in series with the output of the MAX809 (Figure 4). If there are other components in the system which require a reset signal, they should be buffered so as not to load the reset line. If the other components are required to follow the reset I/O of the µP, the buffer should be connected as shown with the solid line. 120 100 80 60 VTH = 4.9 V 40 VTH = 1.6 V 20 BUFFER 0 10.0 BUFFERED RESET TO OTHER SYSTEM COMPONENTS VCC 60.0 110.0 160.0 RESET COMPARATOR OVERDRIVE (mV) VCC VCC P MAX809/810 Figure 2. Maximum Transient Duration vs. Overdrive for Glitch Rejection at 25°C 4.7 k RESET RESET RESET Signal Integrity During Power–Down GND The MAX809 RESET output is valid to VCC = 1.0 V. Below this voltage the output becomes an “open circuit” and does not sink current. This means CMOS logic inputs to the µP will be floating at an undetermined voltage. Most digital systems are completely shutdown well above this voltage. However, in situations where RESET must be maintained RESET GND Figure 4. Interfacing to Bidirectional Reset I/O http://onsemi.com 5 MAX809 Series, MAX810 Series TYPICAL CHARACTERISTICS The following data is given for MAX809 threshold levels: 1.60 V, 2.32 V, 2.93 V, 4.63 V and 4.90 V. 1.20 85°C VTH = 4.9 V VTH = 1.6 V 0.80 SUPPLY CURRENT (µA) SUPPLY CURRENT IN MICROAMP 1.00 0.90 25°C 0.70 0.60 –40°C 0.50 0.40 0.30 0.20 25°C 0.80 –40°C 0.60 0.40 0.20 0.10 0.00 0.5 2.5 1.5 4.5 3.5 0.00 0.5 5.5 1 1.5 SUPPLY VOLTAGE (V) NORMALIZED THRESHOLD VOLTAGE VTH = 1.6 V 1.08 1.06 1.04 1.02 VTH = 4.9 V 1.00 0.98 –40 –20 0 20 40 60 2.5 3 3.5 4 4.5 5 5.5 Figure 6. Supply Current vs. Supply Voltage 1.12 1.10 2 SUPPLY VOLTAGE (V) Figure 5. Supply Current vs. Supply Voltage NORMALIZED POWER–UP RESET TIMEOUT 85°C 1.00 80 1.002 VTH = 4.9 V 1.001 1.000 0.999 0.998 0.997 0.996 0.995 VTH = 1.6 V 0.994 0.993 0.992 –40 –20 0 20 40 60 80 TEMPERATURE (°C) TEMPERATURE (°C) Figure 7. Normalized Power–Up Reset vs. Temperature Figure 8. Normalized Reset Threshold Voltage vs. Temperature http://onsemi.com 6 MAX809 Series, MAX810 Series TYPICAL CHARACTERISTICS The following data is given for MAX809 threshold levels: 2.63 V, 3.08 V, 4.00 V and 4.38 V; MAX810 threshold levels: 2.63 V, 2.93 V, 3.08 V, 4.38 V and 4.63 V. 35 30 VCC = 5 V 25 VCC = 5 V SUPPLY CURRENT ( A) SUPPLY CURRENT ( A) 30 25 20 VCC = 3 V 15 10 5 0 -40 20 10 5 VCC = 1 V -20 0 20 40 TEMPERATURE (C°) 60 0 -40 85 Figure 9. Supply Current vs. Temperature (No Load, MAX8xxR/T, MAX810S) 60 VOD = 20 mV 40 20 0 -40 VOD = 100 mV VOD = 200 mV -20 0 20 40 TEMPERATURE (C°) 60 0 20 40 TEMPERATURE (C°) 60 85 85 VOD = VTH – VCC 120 VOD = 10 mV 100 80 VOD = 20 mV 60 40 VOD = 100 mV 20 0 -40 VOD = 200 mV -20 0 20 40 TEMPERATURE (C°) 60 85 Figure 12. Power–Down Reset Delay vs. Temperature and Overdrive (MAX8xxM/MAX809J, MAX810L) Figure 11. Power–Down Reset Delay vs. Temperature and Overdrive (MAX8xxR/T, MAX810S) 250 1.003 245 NORMALIZED THRESHOLD POWER-UP RESET TIMEOUT (msec) -20 140 VOD = VTH – VCC VOD = 10 mV 80 VCC = 1 V Figure 10. Supply Current vs. Temperature (No Load, MAX8xxM/MAX809J, MAX810L) POWER-DOWN RESET DELAY ( sec) POWER-DOWN RESET DELAY ( sec) 100 VCC = 3 V 15 1.002 MAX810L MAX8xxM/MAX809J 1.001 240 1.000 235 MAX8xxR/T MAX810S 0.999 230 225 -40 0.998 -20 0 20 40 TEMPERATURE (C°) 60 0.997 85 -40 Figure 13. Power–Up Reset Timeout vs. Temperature -20 0 20 40 TEMPERATURE (C°) 60 85 Figure 14. Normalized Reset Threshold vs. Temperature http://onsemi.com 7 MAX809 Series, MAX810 Series TAPING FORM Component Taping Orientation for 3L SOT–23 (JEDEC–236) Devices USER DIRECTION OF FEED DEVICE MARKING PIN 1 Standard Reel Component Orientation (Mark Right Side Up) Tape & Reel Specifications Table Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT–23 8 mm 4 mm 3000 7 inches MARKING AND THRESHOLD INFORMATION Semicond ctor Part # ON Semiconductor VTH* Description Marking MAX809SN160T1 1.60 SAAM MAX809SN232T1 2.32 SQPM MAX809STR 2.93 SPTM MAX809LTR 4.63 SPWM MAX809SN490T1 4.90 MAX809MTR 4.38 J2YW MAX809TTR 3.08 J3YW MAX809RTR 2.63 J5YW MAX809JTR 4.00 J6YW MAX810MTR 4.38 K2YW MAX810TTR 3.08 K3YW MAX810RTR 2.63 MAX810LTR 4.63 Push–Pull RESET Push–Pull RESET SBHM K5YW K1YW MAX810STR 2.93 *Contact your ON Semiconductor sales representative for other threshold voltage options. http://onsemi.com 8 K4YW MAX809 Series, MAX810 Series PACKAGE DIMENSIONS SOT–23 PLASTIC PACKAGE (TO–236) CASE 318–08 ISSUE AF NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. A L 3 1 V B S 2 G C D H K J http://onsemi.com 9 DIM A B C D G H J K L S V INCHES MIN MAX 0.1102 0.1197 0.0472 0.0551 0.0350 0.0440 0.0150 0.0200 0.0701 0.0807 0.0005 0.0040 0.0034 0.0070 0.0140 0.0285 0.0350 0.0401 0.0830 0.1039 0.0177 0.0236 MILLIMETERS MIN MAX 2.80 3.04 1.20 1.40 0.89 1.11 0.37 0.50 1.78 2.04 0.013 0.100 0.085 0.177 0.35 0.69 0.89 1.02 2.10 2.64 0.45 0.60 MAX809 Series, MAX810 Series Notes http://onsemi.com 10 MAX809 Series, MAX810 Series Notes http://onsemi.com 11 MAX809 Series, MAX810 Series ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. 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