MANUAL RESET (MR) (RESET)/ RESET RESET MAX16084 MAX16085 MAX16086 GND. Maxim Integrated Products 1

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1 ; Rev 0; 6/11 General Description The family of supervisory circuits monitors voltages from +1.1V to +5V using a factory-set reset threshold. The MAX16084/MAX16085/MAX16086 offer a manual reset (MR) input while the MAX16087/ MAX16088/MAX16089 offer a reset input (IN). The IN input allows for monitoring of an additional voltage. The combination of these features significantly improves system reliability and accuracy when compared to separate ICs or discrete components. The MAX16081/MAX16084/MAX16087 feature a pushpull, active-low reset output. The MAX16082/MAX16085/ MAX16088 feature a push-pull active-high reset output. The MAX16083/MAX16086/MAX16089 feature an open-drain active-low reset output. The reset output asserts and remains asserted for the reset timeout period after the monitored voltage exceeds its threshold. All devices are offered with reset timeout periods ranging from 30Fs to 1.8s. The MAX16081/MAX16082/MAX16083 are available in 3-pin SC70 and SOT23 packages. The MAX16084 MAX16089 are available in 4-pin SC70 and SOT23 packages. All devices are fully specified over the military -55NC to +125NC temperature range. Ultra-Versatile, Low-Power, Features S Low Supply Current: 5µA (typ), 6.8µA (max) at 3.6V Over Temperature (+125 C) S Factory-Set Reset Threshold Options from 1.1V to 5V in 50mV/100mV Increments S Manual Reset Input (MAX16084/MAX16085/MAX16086) S IN Monitoring Input (MAX16087/MAX16088/MAX16089) S Guaranteed Reset Valid to VCC R 1V S Push-Pull or Open-Drain Reset Output Options S Power-Supply Transient Immunity S -55 C to +125 C Operating Temperature Range Portable/Battery-Powered Equipment e-readers/tablets Smartphones Industrial Equipment Automotive/Military Equipment Applications Ordering Information PART OUTPUT TYPE MANUAL (MR) IN INPUT PIN-PACKAGE TEMP RANGE MAX16081XR +T Push-pull, active-low 3 SC70-55NC to +125NC MAX16081UR +T* Push-pull, active-low 3 SOT23-55 C to +125 C Note: See the Selector Guide for reset threshold voltage and reset timeout options. All devices are available in tape-and-reel only. Required order increment is 2,500 pieces. +Denotes a lead(pb)-free/rohs-compliant package. T = Tape and reel. *Future product contact factory for availability. Ordering Information is continued and Selector Guide appears at end of data sheet. Typical Operating Circuits C1 0.1µF MAX16081 MAX16082 MAX16083 ()/ µp C1 0.1µF PUSH- BUTTON SWITCH MR MAX16084 MAX16085 MAX16086 ()/ µp C1 0.1µF R1 1.8V IN MAX16087 MAX16088 MAX16089 ()/ µp R2 () ONLY FOR THE MAX16082/MAX16085/MAX Maxim Integrated Products 1 For information on other Maxim products, visit Maxim s website at

2 Ultra-Versatile, Low-Power, ABSOLUTE MAXIMUM RATINGS (Voltages referenced to.) v to +6V Open-Drain Output V to +6V, Push-Pull Output V to ( + 0.3V) MR, IN V to ( + 0.3V) Input/Output Current (all pins)...20ma Continuous Power Dissipation (T A = +70NC) 3-Pin SC70 (derate 2.9mW/NC above +70NC)...235mW 3-Pin SOT23 (derate 2.9mW/NC above +70NC)...235mW 4-Pin SC70 (derate 3.1mW/NC above +70NC)...248mW 4-Pin SOT23 (derate 3.4mW/NC above +70NC)...276mW Operating Temperature Range NC to +125NC Storage Temperature Range NC to +150NC Junction Temperature NC Lead Temperature (soldering, 10s) NC Soldering Temperature (reflow) nc Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS ( = 1V to 5.5V, C1 = 0.1µF, T A = -55NC to +125NC, unless otherwise noted. Typical values are at T A = +25NC.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Voltage Range (Note 2) V Undervoltage Lockout UVLO (Note 3) 0.9 V = 5.5V, no load 7 10 Supply Current I CC = 3.6V, no load Threshold Voltage V TH See Table 2 T A = -40NC to +85NC T A = -55NC to +125NC Reset Threshold Hysteresis V HYST rising 5 %V TH Reset Threshold Tempco DV TH /NC 30 ppm/nc IN Input Voltage Threshold IN Input Leakage Current / OUTPUT Output Low (Note 3) Output High (Push-Pull Output) High-Impedance Input Leakage Current (Open-Drain ) V TH - 2.5% V TH - 3.0% V TH + 2.5% V TH + 3.0% T A = -40NC to +85NC V THRST T A = -55NC to +125NC I IN µa V OL V OH = V TH(MIN), V TH > 4.25V, I SINK = 10mA 0.4 = V TH(MIN), V TH > 2.5V, I SINK = 3.2mA 0.4 = V TH(MIN), V TH > 1.67V, I SINK = 1mA 0.4 = V TH(MIN), V TH > 1V, I SINK = 100FA 0.4 > 0.9V, falling, I SINK = 15FA 0.4 > 0.9V, I SOURCE = 15FA 0.8 x > 1.2V, I SOURCE = 100FA 0.8 x > 1.67V, I SOURCE = 150FA 0.8 x > 2.7V, I SOURCE = 500FA 0.8 x > 4.5V, I SOURCE = 800FA Reset not asserted µa FA V V V V 2

3 ELECTRICAL CHARACTERISTICS (continued) ( = 1V to 5.5V, C1 = 0.1µF, T A = -55NC to +125NC, unless otherwise noted. Typical values are at T A = +25NC.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MANUAL INPUT (MR) MR Input High Voltage V IH 0.7 x V MR Input Low Voltage V IL 0.3 x V MR Pullup Resistance ki TIMING Reset Timeout Period t RP See list A in the Selector Guide 30 µs See lists B N in the Selector Guide t RP - 65% 1 = 1.1V x V TH t RP - 33% t RP t RP + 65% t RP t RP + 33% MR Minimum Pulse Width t MPW 1 Fs MR Glitch Rejection t EGR 100 ns MR to Reset Delay 200 ns to Reset Delay t DL falling at 10mV/Fs from (V TH + 100mV) to (V TH - 100mV) ms 30 Fs IN to Reset Delay V IN falling at 10mV/Fs from (V TH + 100mV) to (V TH - 100mV) 5.5 Fs Note 1: Production testing done at T A = +25NC only. Overtemperature limits are guaranteed by design and are not production tested. Note 2: Reset is guaranteed down to = 1V. Note 3: Guaranteed by design. Timing Diagram 1V V RST VRST 1V t RP t RD t RP t RD Figure 1. MAX16084/MAX16086 Timing Diagram 3

4 Ultra-Versatile, Low-Power, ( = 3.3V, T A = +25NC, unless otherwise noted.) SUPPLY CURRENT (µa) NORMALIZED TIMEOUT PERIOD (%) SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) NORMALIZED TIMEOUT PERIOD vs. TEMPERATURE TEMPERATURE ( C) MAX16081 toc01 MAX16081 toc03 Typical Operating Characteristics SUPPLY CURRENT (µa) OUTPUT LOW VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE = 5V = 3.3V TEMPERATURE ( C) OUTPUT LOW VOLTAGE vs. SINK CURRENT SINK CURRENT (ma) MAX16081 toc02 MAX16081 toc04 OUTPUT HIGH VOLTAGE (V) OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT MAX16081 toc05 SINK CURRENT (ma) SINK CAPABILITY vs. V OL = 0.3V V OL = 0.1V MAX16081 toc SOURCE CURRENT (ma) (V) 4

5 Typical Operating Characteristics (continued) ( = 3.3V, T A = +25NC, unless otherwise noted.) SOURCE CURRENT (ma) SOURCE CAPABILITY vs (V) MR TO OUTPUT DELAY MAX16081 toc09 200ns/div MAX16081 toc07 MR 2V/div 2V/div MAXIMUM VCC TRANSIENT DURATION (µs) VCC TO OUTPUT DELAY (µs) MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE THRESHOLD OVERDRIVE (V) TO OUTPUT DELAY vs. TEMPERATURE TEMPERATURE ( C) MAX16081 toc08 MAX16081 toc10 5

6 TOP VIEW 1 () 2 + MAX16081 MAX16082 MAX16083 SOT23/SC70 ( ) MAX16082/MAX16085/MAX *MR ONLY FOR THE MAX16084/MAX16085/MAX **IN ONLY FOR THE MAX16087/MAX16088/MAX () MAX MAX16089 SOT MR* IN** () 1 2 Pin Configurations + MAX MAX16089 SC MR* IN** Pin Description (MAX16081/MAX16082/MAX16083) PIN MAX16081 MAX16082 MAX16083 NAME SOT23/SC70 SOT23/SC70 SOT23/SC Ground FUNCTION 2 2 Active-Low Push-Pull Reset Output. changes from high to low when drops below the detector threshold (V TH ). remains low for the reset timeout period after exceeds V TH. Active-High Push-Pull Reset Output. changes from low to high when drops below the detector threshold (V TH ). remains high for the reset timeout period after exceeds V TH. 2 Active-Low Open-Drain Reset Output. changes from high impedance to active low when drops below the detector threshold (V TH ). remains low for the reset timeout period after exceeds the reset threshold Supply Voltage and Input for the Reset Threshold Monitor 6

7 PIN MAX16084 MAX16085 MAX16086 MAX16087 MAX16088 MAX16089 SOT23/SC70 Pin Description (MAX16084 MAX16089) NAME Ground 2 2 FUNCTION Active-Low, Push-Pull Reset Output. changes from high to low when drops below the detector threshold (V TH ) or MR is pulled low. remains low for the reset timeout period after exceeds V TH and MR is high. Active-Low, Push-Pull Reset Output. changes from high to low when drops below the detector threshold (V TH ) or IN drops below V THRST. remains low for the reset timeout period after exceeds V TH and IN exceeds V THRST. 2 2 Active-High, Push-Pull Reset Output. changes from low to high when drops below the detector threshold (V TH ) or MR is pulled low. remains high for the reset timeout period after exceeds V TH and MR is high. Active-High, Push-Pull Reset Output. changes from low to high when drops below the detector threshold (V TH ) or IN drops below V THRST. remains low for the reset timeout period after exceeds V TH and IN exceeds V THRST. 7

8 Pin Description (MAX16084 MAX16089) (continued) PIN MAX16084 MAX16085 MAX16086 MAX16087 MAX16088 MAX16089 SOT23/SC70 NAME 2 2 FUNCTION Active-Low, Open-Drain Reset Output. changes from high-impedance to active-low when drops below the detector threshold (V TH ) or MR is pulled low. remains low for the reset timeout period after exceeds the reset threshold and MR is high. Active-Low, Open-Drain Reset Output. changes from high-impedance to active-low when drops below the detector threshold (V TH ) or IN drops below V THRST. remains low for the reset timeout period after exceeds V TH and IN exceeds V THRST MR IN Active-Low, Manual Reset Input. Drive low to force a reset. Reset remains active as long as MR is low and for the reset timeout period (if applicable) after MR is driven high. MR has an internal pullup resistor connected to, and can be left unconnected, if not used. Active-Low, Reset Input. Reset is asserted when IN falls below V THRST. Reset remains active as long as IN is below V THRST and for the reset timeout period (if applicable) after IN is above V THRST. Connect IN to, if not used Supply Voltage and Input for the Reset Threshold Monitor 8

9 V REF REF MAX16081 MAX16082 MAX16083 TIMEOUT PERIOD OUTPUT DRIVER () Detailed Description The family of supervisory circuits monitors voltages from 1.1V to 5.0V. The MAX16084/ MAX16085/MAX16086 offers a manual reset (MR) input while the MAX16087/MAX16088/MAX16089 offers a reset input (IN). The IN input allows for monitoring of an additional voltage that can be as low as 0.4V. The MAX16081/MAX16084/MAX16087 feature a pushpull, active-low reset output. The MAX16082/MAX16085/ MAX16088 feature a push-pull active-high reset output. The MAX16083/MAX16086/MAX16089 feature an opendrain, active-low reset output. The reset output asserts and remains asserted for the reset timeout period after the monitored voltage exceeds its threshold. All devices are offered with reset timeout periods ranging from 30Fs to 1.8s. Supply and Monitored Input (VCC) The operate with a VCC supply voltage from 1.0V to 5.5V. VCC has a rising threshold of VTH + VHYST and a falling threshold of VTH. When VCC rises above VTH + VHYST and MR is high (MAX16084/ MAX16085/MAX16086) or IN is above its threshold (MAX16087/MAX16088/MAX16089), goes high ( goes low) after the reset timeout period (trp). See the timing diagram in Figure 1. When VCC falls below VTH, goes low ( goes high) after a fixed delay (trd). Manual Reset Input (MR) (MAX16084/MAX16085/MAX16086) Many µp-based products require manual reset capability, allowing the operator, a test technician, or external logic V REF MAX16084 MAX16085 MAX16086 REF MR TIMEOUT PERIOD OUTPUT DRIVER () Functional Diagrams MAX16087 MAX16088 MAX16089 V REF IN circuit to initiate a reset. A logic-low on MR asserts reset. Reset remains asserted while MR is low, and for the reset active timeout period (trp) or delay (ton) after MR returns high. This input has an internal 50kI pullup resistor, so it can be left unconnected if it is not used. MR can be driven with TTL or CMOS logic levels, or with open-drain/collector outputs. For manual operation connect a normally open momentary switch from MR to ; external debouncing circuitry is not required. If MR is driven from long cables or if the device is used in a noisy environment, connect a 0.1FF capacitor from MR to ground to provide additional noise immunity. Dual-Voltage Monitoring (IN) (MAX16087/MAX16088/MAX16089) The MAX16087/MAX16088/MAX16089 monitor both the VCC voltage and the IN voltage (see Figure 2). Reset asserts when either of the voltages falls below its respective threshold voltage and remains asserted while either is below its threshold, and for the reset timeout period (trp) after both voltages exceed their respective thresholds. IN is a high-impedance comparator input with a 0.4V threshold to monitor a second supply voltage. To establish an externally controlled threshold voltage, VMON_TH, connect a resistive divider network from VMON_TH to IN to. The monitored voltage reset threshold is: VMON_TH = VTHRST x ((R1 + R2)/ R2), where VTHRST = 0.4V (typ). Low-leakage current at IN allows the use of large-valued resistors, resulting in reduced power consumption of the system. REF V REF TIMEOUT PERIOD OUTPUT DRIVER () 9

10 Applications Information Interfacing to µp with Bidirectional Reset Pins Since on the MAX16083/MAX16086/MAX16089 is open-drain, these devices interface easily with FPs that have bidirectional reset pins. Connecting the device s output directly to the FP s input with a single pullup resistor allows either device to assert reset (Figure 3). Negative-Going VCC Transients ESD Protection The family of devices is relatively immune to short-duration, negative-going VCC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Reset Threshold Overdrive graph, which indicates the typical transient pulse width and amplitude required to trigger a reset. The reset threshold overdrive specifies how far the pulse falls below the actual reset threshold, and the maximum transient duration specifies the width of the pulse as it crosses the reset threshold. If a pulse occurs in the region above the curve, a reset triggers. If a pulse occurs in the region below the curve, a reset does not trigger. Table 1. Package Type SUFFIX PIN-PACKAGE PACKAGE CODE XR 3 SC70 X3+2 XS 4 SC70 X4+1 UR 3 SOT23* U3+2 US 4 SOT23* U4+1 *Future product contact factory for availability. IN MAX16087 MAX16088 MAX16089 V MON_TH R1 C1 = 0.1µF V REF V REF REF TIMEOUT PERIOD R2 µp MAX16083 MAX16086 MAX16089 µp MOTOROLA 68HCXX OUTPUT DRIVER () MR INPUT () ONLY FOR THE MAX () Figure 2. MAX16087/MAX16088/MAX16089 Monitoring Two Voltages Figure 3. Interfacing to µp with Bidirectional Reset Pins 10

11 MAX160 BASE PART NUMBER PINS OUTPUT FEATURES PUSH-PULL PUSH-PULL OPEN DRAIN 84 PUSH-PULL 85 PUSH-PULL WITH MR OPEN DRAIN PUSH-PULL 88 PUSH-PULL WITH IN 89 OPEN DRAIN THRESHOLD VOLTAGE (TYP) Selector Guide PACKAGE SPECIFIER TIMEOUT (MIN) UR XR XS US PINS 3 4 PACKAGE SOT23 SC70 SC70 SOT23 CODE U3+2 X3+2 X4+1 U A B C D E F G H I J K L M N 30µs (typ) 1ms 2ms 3ms 5ms 10ms 15ms 20ms 25ms 35ms 40ms 50ms 70ms 100ms O 140ms P 150ms Q R S T U V W 200ms 280ms 400ms 560ms 800ms 1120ms 1200ms

12 Table 2. Factory Trimmed Reset Thresholds THRESHOLD SUFFIX T A = +25NC TRIP THRESHOLD T A = -55NC to +125NC TYP (V) MIN (V) MAX (V) Table 3. Reset Timeout TIMEOUT PERIODS SUFFIX T A = +25NC T A = -55NC to +125NC UNITS TYP MIN MAX A 30 Fs B ms C ms D ms E ms F ms G ms H ms I ms J ms K ms L ms M ms N ms O ms P ms Q ms R ms S ms T ms U ms W ms X ms 12

13 PART OUTPUT TYPE MANUAL (MR) Ordering Information (continued) IN INPUT PIN-PACKAGE TEMP RANGE MAX160821XR +T Push-pull, active-high 3 SC70-55 C to +125 C MAX16082UR +T* Push-pull, active-high 3 SOT23-55 C to +125 C MAX16083XR +T Open-drain, active-low 3 SC70-55 C to +125 C MAX16083UR +T* Open-drain, active-low 3 SOT23-55 C to +125 C MAX16084XS +T Push-pull, active-low 4 SC70-55 C to +125 C MAX16084US +T* Push-pull, active-low 4 SOT23-55 C to +125 C MAX16085XS +T Push-pull, active-high 4 SC70-55 C to +125 C MAX16085US +T* Push-pull, active-high 4 SOT23-55 C to +125 C MAX16086XS +T Open-drain, active-low 4 SC70-55 C to +125 C MAX16086US +T* Open-drain, active-low 4 SOT23-55 C to +125 C MAX16087XS +T Push-pull, active-low 4 SC70-55 C to +125 C MAX16087US +T* Push-pull, active-low 4 SOT23-55 C to +125 C MAX16088XS +T Push-pull, active-high 4 SC70-55 C to +125 C MAX16088US +T* Push-pull, active-high 4 SOT23-55 C to +125 C MAX16089XS +T Open-drain, active-low 4 SC70-55 C to +125 C MAX16089US +T* Open-drain, active-low 4 SOT23-55 C to +125 C Note: See the Selector Guide for reset hreshold voltage and reset timeout options. All devices are available in tape-and-reel only. Required order increment is 2,500 pieces. +Denotes a lead(pb)-free/rohs-compliant package. T = Tape and reel. *Future product contact factory for availability. PROCESS: BiCMOS Chip Information Package Information For the latest package outline information and land patterns (footprints), go to Note that a +, #, or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 3 SC70 X SC70 X SOT23 U SOT23 U

14 REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED 0 6/11 Initial release Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.