19-2379; Rev 0; 4/02 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package Features ♦ Monitor Four Power-Supply Voltages ♦ Precision Factory-Set Threshold Options for 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V (Nominal) Supplies ♦ Adjustable Voltage Threshold Monitors Down to 0.62V ♦ High-Accuracy (±2.0%) Adjustable Threshold Inputs ♦ Low Supply Current MAX6709: 35µA MAX6714: 60µA ♦ Four Independent, Active-Low, Open-Drain Outputs with 10µA Internal Pullup to VCC ♦ 140ms (min) Reset Timeout Period (MAX6714 only) ♦ 2.0V to 5.5V Supply Voltage Range ♦ Immune to Supply Transients ♦ Fully Specified from -40°C to +85°C ♦ Small 10-Pin µMAX Package Ordering Information PART MAX6709_UB* TEMP RANGE PIN-PACKAGE -40°C to +85°C 10 µMAX MAX6714_UB* -40°C to +85°C 10 µMAX *Insert the desired letter from the Selector Guide into the blank to complete the part number. Applications Pin Configurations Telecommunications Servers High-End Printers Desktop and Notebook Computers TOP VIEW Data Storage Equipment IN1 1 Networking Equipment IN2 Multivoltage Systems Typical Operating Circuits appear at end of data sheet. Selector Guides appear at end of data sheet. 10 VCC 2 MAX6709 9 PWRGD1 IN3 3 8 PWRGD2 IN4 4 7 PWRGD3 GND 5 6 PWRGD4 µMAX Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX6709/MAX6714 General Description The MAX6709/MAX6714 quad voltage monitors provide accurate monitoring of up to four supplies without any external components. A variety of factory-trimmed threshold voltages and supply tolerances are available to optimize the MAX6709/MAX6714 for specific applications. The selection includes input options for monitoring 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V voltages. Additional high-inputimpedance comparator options can be used as adjustable voltage monitors, general-purpose comparators, or digital-level translators. The MAX6709 provides four independent open-drain outputs with 10µA internal pullup to VCC. The MAX6714 provides an active-low, open-drain RESET output with integrated reset timing and three power-fail comparator outputs. Each of the monitored voltages is available with trip thresholds to support power-supply tolerances of either 5% or 10% below the nominal voltage. An internal bandgap reference ensures accurate trip thresholds across the operating temperature range. The MAX6709 consumes only 35µA (typ) of supply current. The MAX6714 consumes only 60µA (typ) of supply current. The MAX6709/MAX6714 operate with supply voltages of 2.0V to 5.5V. An internal undervoltage lockout circuit forces all four digital outputs low when VCC drops below the minimum operating voltage. The four digital outputs have weak internal pullups to V CC , accommodating wire-ORed connections. Each input threshold voltage has an independent output. The MAX6709/MAX6714 are available in a 10-pin µMAX package and operate over the extended (-40°C to +85°C) temperature range. MAX6709/MAX6714 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package ABSOLUTE MAXIMUM RATINGS All Pins to GND.........................................................-0.3V to +6V Input/Output Current (all pins) ............................................20mA Continuous Power Dissipation (TA = +70°C) 10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C 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 (MAX6709) (VCC = 2.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 5V and TA = +25°C.) (Note 1) PARAMETER SYMBOL Supply Voltage Range VCC Supply Current ICC Input Current IIN_ CONDITIONS Adjustable Threshold VTH Threshold Voltage Temperature Coefficient TCVTH Threshold Hysteresis VHYST Propagation Delay Output Low Voltage 2 VTH tPD VOL TYP 2.0 MAX UNITS 5.5 V VCC = 3V 25 50 VCC = 5V 35 65 VIN_ = input threshold voltage 25 40 VIN_ = 0 to 0.85V (for adjustable threshold) 5.0V (-5%) Threshold Voltage MIN IN_ decreasing 0.2 4.50 4.63 4.25 4.38 4.50 3.3V (-5%) 3.00 3.08 3.15 3.3V (-10%) 2.85 2.93 3.00 3.0V (-5%) 2.70 2.78 2.85 3.0V (-10%) 2.55 2.63 2.70 2.5V (-5%) 2.25 2.32 2.38 2.5V (-10%) 2.13 2.19 2.25 1.8V (-5%) 1.62 1.67 1.71 1.8V (-10%) 1.53 1.58 1.62 0.609 0.623 0.635 0.3 x VTH % VIN_ rising at 10mV/µs from VTH to (VTH + 50mV) 5 µs VCC = 5V, ISINK = 2mA 0.3 VCC = 2.5V, ISINK = 1.2mA 0.3 VCC = 1V, ISINK = 50µA (Note 2) 0.3 VCC ≥ 2.0V, ISOURCE = 6µA (min), PWRGD_ unasserted Output High Source Current IOH VCC ≥ 2.0V, PWRGD_ unasserted V ppm/°C 30 VOH V 60 VIN_ falling at 10mV/µs from VTH to (VTH - 50mV) Output High Voltage µA 4.75 5.0V (-10%) IN_ decreasing µA 0.8 x VCC V V 10 _______________________________________________________________________________________ µA Low-Voltage, High-Accuracy Quad, Voltage Monitors in µMAX Package (VCC = 2.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 5V and TA = +25°C.) (Note 1) PARAMETER Supply Voltage Range SYMBOL CONDITIONS VCC Supply Current (Note 3) ICC Power-Fail Input Current IPFI_ 2.0 105 VPFI_ = 0 to 0.85V VPFI_ decreasing 0.2 MAX6714B (-5%) 4.50 4.63 4.75 MAX6714A (-10%) 4.25 4.38 4.50 MAX6714D (-5%) 3.00 3.08 3.15 MAX6714C (-10%) tRD Power-Fail Propagation Delay tPFD 2.93 3.00 0.635 V 280 ms 0.3 x VTH 210 VCC falling at 10mV/µs from (VTH + 100mV) to (VTH - 100mV) 30 VPFI_ falling at 10mV/µs from VTH to (VTH - 50mV) 30 VCC falling at 10mV/µs from (VTH + 100mV) to (VTH - 100mV) 5 µs 0.3 x VCC 0.7 x VCC 1 tMRD MR Pullup Resistance Output Low Voltage % µs MR Glitch Rejection MR to RESET Delay MR to VCC VOL 10 µs ns 200 ns 20 50 0.3 VCC = 2.5V, ISINK = 1.2mA 0.3 VCC = 1V, ISINK = 50µA (Note 2) 0.3 Output High Voltage VOH Output High Source Current IOH VCC ≥ 2.0V, RESET and PFO_ unasserted V 100 VCC = 5V, ISINK = 2mA VCC ≥ 2.0V, ISOURCE = 6mA (min), RESET, PFO_ unasserted V 0.623 140 MR Minimum Input Pulse µA 2.85 VPFI_ increasing relative to VPFI_ decreasing VIH µA 0.609 VIL MR Input Voltage V 80 VPFI Reset Delay 5.5 VCC = 5V Power-Fail Input Threshold tRP UNITS 90 VCC decreasing VHYST MAX 60 VTH Reset Timeout Period TYP VCC = 3V VCC Reset Threshold Threshold Hysteresis MIN kΩ V V 0.8 x VCC 10 µA Note 1: 100% production tested at TA = +25°C. Overtemperature limits guaranteed by design. Note 2: Condition at VCC = 1V is guaranteed only from TA = 0°C to +70°C. Note 3: Monitored voltage 5V/3.3V is also the device supply. In the typical condition, supply current splits as follows: 25µA for the resistor-divider, and the rest for other circuitry. _______________________________________________________________________________________ 3 MAX6709/MAX6714 ELECTRICAL CHARACTERISTICS (MAX6714) Typical Operating Characteristics (VCC = 5V, TA = +25°C, unless otherwise noted.) 30 25 20 TA = -40°C 15 80 50 40 TA = -40°C 30 5 10 0.08 NORMALIZED TO VCC = 5V 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 -0.01 0 -0.02 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) NORMALIZED THRESHOLD vs. TEMPERATURE (MAX6709) NORMALIZED PFI_ THRESHOLD vs. TEMPERATURE (MAX6714) OUTPUT VOLTAGE LOW vs. SINK CURRENT 0.05 0 -0.05 -0.10 1.004 1.002 1.000 0.998 0.996 0.994 -0.15 0.992 -0.20 0.990 -15 10 35 60 3.0 3.5 4.0 4.5 5.0 200 180 TA = +85°C 160 140 120 TA = +25°C 100 80 TA = -40°C 60 40 0 -15 10 35 60 85 0 1 2 3 4 5 6 7 8 9 TEMPERATURE (°C) TEMPERATURE (°C) SINK CURRENT (mA) MAXIMUM TRANSIENT DURATION vs. VCC OVERDRIVE (MAX6714) MAXIMUM TRANSIENT DURATION vs. PFI_ OVERDRIVE (MAX6714) RESET TIMEOUT PERIOD vs. TEMPERATURE (MAX6714) 80 70 60 50 RESET ASSERTS ABOVE THIS LINE 10 0 0 100 200 300 400 500 600 700 800 900 1000 VCC OVERDRIVE (mV) 120 110 100 90 80 70 60 PFO_ ASSERTS ABOVE THIS LINE 50 40 30 20 10 0 216 10 MAX6709/14 toc09 110 100 90 RESET TIMEOUT PERIOD (ms) MAX6709/14 toc07 120 5.5 20 -40 85 MAXIMUM TRANSIENT DURATION (µs) -40 2.5 MAX6709/14 toc06 1.006 2.0 OUTPUT VOLTAGE LOW (mV) 0.10 VCC = 3V OR 5V 1.008 NORMALIZED PFI_ THRESHOLD MAX6709/14 toc04 0.15 1.010 MAX6709/14 toc05 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.20 NORMALIZED THRESHOLD TA = +25°C 60 20 0 4 70 10 40 30 20 TA = +85°C MAX6709/14 toc03 TA = +25°C 35 90 MAX6709/14 toc08 SUPPLY CURRENT (µA) 40 100 NORMALIZED THRESHOLD ERROR vs. SUPPLY VOLTAGE (MAX6709) MAX6709/14 toc02 TA = +85°C SUPPLY CURRENT (µA) 45 MAX6709/14 toc01 50 SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX6714) NORMALIZED THRESHOLD ERROR (%) SUPPLY CURRENT vs. SUPPLY VOLTAGE (MAX6709) MAXIMUM TRANSIENT DURATION (µs) MAX6709/MAX6714 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package 215 214 213 212 211 210 0 20 40 100 PFI_ OVERDRIVE (mV) 500 1000 -40 -15 10 35 TEMPERATURE (°C) _______________________________________________________________________________________ 60 85 Low-Voltage, High-Accuracy Quad, Voltage Monitors in µMAX Package PFO_ PULLUP AND PULLDOWN RESPONSE (CPFO_ = 47pF) PROPAGATION DELAY (WITH 100mV OVERDRIVE) MAX6709/14 toc11 MAX6709/14 toc10 IN_ (PFI_) 100mV/div AC-COUPLED PFI_ 50mV/div AC-COUPLED PWRGD_ (PFO_) 2V/div PFO_ 2V/div 10µs/div 10µs/div RESET TIMEOUT DELAY MAX6709/14 toc12 MR 2V/div RESET 2V/div 40ms/div _______________________________________________________________________________________ 5 MAX6709/MAX6714 Typical Operating Characteristics (continued) (VCC = 5V, TA = +25°C, unless otherwise noted.) Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package MAX6709/MAX6714 Pin Description PIN 6 NAME FUNCTION MAX6709 MAX6714 1 — IN1 Input Voltage 1. See Selector Guide for monitored voltages. 2 — IN2 Input Voltage 2. See Selector Guide for monitored voltages. 3 — IN3 Input Voltage 3. See Selector Guide for monitored voltages. 4 — IN4 Input Voltage 4. See Selector Guide for monitored voltages. 5 5 GND Ground 6 — PWRGD4 Output 4. PWRGD4 asserts low when IN4 falls below its threshold voltage. PWRGD4 is open drain with a 10µA internal pullup current source to VCC. 7 — PWRGD3 Output 3. PWRGD3 asserts low when IN3 falls below its threshold voltage. PWRGD3 is open drain with a 10µA internal pullup current source to VCC. 8 — PWRGD2 Output 2. PWRGD2 asserts low when IN2 falls below its threshold voltage. PWRGD2 is open drain with a 10µA internal pullup current source to VCC. 9 — PWRGD1 Output 1. PWRGD1 asserts low when IN1 falls below its threshold voltage. PWRGD1 is open drain with a 10µA internal pullup current source to VCC. 10 10 VCC Power-Supply Input. Connect VCC to a 2.0V to 5.5V supply. An undervoltage lockout circuit forces all PWRGD_ outputs low when VCC drops below the minimum operating voltage. VCC is not a monitored voltage for the MAX6709. For the MAX6714, RESET asserts low when VCC drops below its threshold. — 1 MR Manual Reset Input. Force MR low to assert the RESET output. RESET remains asserted for the reset timeout period after MR goes high. MR is internally pulled up to VCC. — 2 PFI1 Power-Fail Input 1. Input to noninverting input of the power-fail comparator. PFI1 is compared to an internal 0.62V reference. Use an external resistor-divider network to adjust the monitor threshold. — 3 PFI2 Power-Fail Input 2. Input to noninverting input of the power-fail comparator. PFI2 is compared to an internal 0.62V reference. Use an external resistor-divider network to adjust the monitor threshold. — 4 PFI3 Power-Fail Input 3. Input to noninverting input of the power-fail comparator. PFI3 is compared to an internal 0.62V reference. Use an external resistor-divider network to adjust the monitor threshold. — 6 PFO3 Power-Fail Output 3. PFO3 is an active-low, open-drain output with a 10µA internal pullup to VCC. PFO3 asserts low when PFI3 is below the selected threshold. — 7 PFO2 Power-Fail Output 2. PFO2 is an active-low, open-drain output with a 10µA internal pullup to VCC. PFO2 asserts low when PFI2 is below the selected threshold. — 8 PFO1 Power-Fail Output 1. PFO1 is an active-low, open-drain output with a 10µA internal pullup to VCC. PFO1 asserts low when PFI1 is below the selected threshold. — 9 RESET Reset Output. RESET is an active-low, open-drain output that asserts low when VCC drops below its preset threshold voltage or when a manual reset is initiated. RESET remains low for the reset timeout period after VCC exceeds the selected reset threshold or MR is released. _______________________________________________________________________________________ Low-Voltage, High-Accuracy Quad, Voltage Monitors in µMAX Package The MAX6709/MAX6714 are low-power, quad voltage monitors designed for multivoltage systems. Preset voltage options for 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V make these quad monitors ideal for applications such as telecommunications, desktop and notebook computers, high-end printers, data storage equipment, and networking equipment. The MAX6709/MAX6714 have an internally trimmed threshold that minimizes or eliminates the need for external components. The four open-drain outputs have weak (10µA) internal pullups to VCC, allowing them to interface easily with other logic devices. The weak internal pullups can be overdriven by external pullups to any voltage from 0 to 5.5V. Internal circuitry prevents current flow from the external pullup voltage to VCC. The outputs can be wire-ORed for a single power-good signal. The MAX6709 quad voltage monitor includes an accurate reference, four precision comparators, and a series of internally trimmed resistor-divider networks to set the factory-fixed threshold options. The resistor networks scale the specified IN_ reset voltages to match the internal reference/comparator voltage. Adjustable threshold options bypass the internal resistor networks and connect directly to one of the comparator inputs (an external resistor-divider network is required for threshold matching). The MAX6709 monitors power supplies with either 5% or 10% tolerance specifications, depending on the selected version. Additional high-input-impedance comparator options can be used VCC IN1 (ADJ) PWRGD1 VCC IN2 (3.3V/3.0V) PWRGD2 VCC IN3 (2.5V/1.8V) PWRGD3 VCC IN4 (ADJ) PWRGD4 VCC 0.62V REFERENCE UNDERVOLTAGE LOCKOUT MAX6709 Figure 1. MAX6709 Functional Diagram _______________________________________________________________________________________ 7 MAX6709/MAX6714 Detailed Description MAX6709/MAX6714 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package VCC MR RESET TIMEOUT (200ms) VCC (5.0V/3.3V) VCC PFI1 (ADJ) PFO1 VCC PFI2 (ADJ) PFO2 VCC PFI3 (ADJ) PFO3 0.62V REFERENCE VCC UNDERVOLTAGE LOCKOUT MAX6714 Figure 2. MAX6714 Functional Diagram as an adjustable voltage monitor, general-purpose comparator, or digital-level translator. The MAX6714 quad voltage monitor/reset offers one fixed input with internal timing for µP reset, three powerfail comparators, and a manual reset input (MR). RESET asserts low when VCC drops below its threshold or MR is driven low. Each of the three power-fail inputs connects directly to one of the comparator inputs. When any input is higher than the threshold level, the output is high. The output goes low as the input drops below the threshold voltage. The undervoltage lockout circuitry remains active and all outputs remain low with VCC down to 1V (Figures 1 and 2). 8 Applications Information Hysteresis When the voltage on one comparator input is at or near the voltage on another input, ambient noise generally causes the comparator output to oscillate. The most common way to eliminate this problem is through hysteresis. When the two comparator input voltages are equal, hysteresis causes one comparator input voltage to move quickly past the other, thus taking the input out of the region where oscillation occurs. Standard comparators require hysteresis to be added through the use of external resistors. The external resistive network usually provides a positive feedback to the input in order to cause a jump in the threshold voltage when output toggles in one direction or the other. These _______________________________________________________________________________________ Low-Voltage, High-Accuracy Quad, Voltage Monitors in µMAX Package MAX6709/MAX6714 5V 5V VCC V1 IN1 V2 IN2 V3 IN3 V4 IN4 MAX6709 VCC VIN (5V) PWRGD1 D1 IN1 PWRGD1 IN2 MAX6709 PWRGD2 IN3 PWRGD3 IN4 PWRGD4 D2 D3 PWRGD2 PWRGD3 D4 PWRGD4 GND GND Figure 3. Quad Undervoltage Detector with LED Indicators 5V VTH1 = 1 + R2 VREF R1 ( ) PWRGD1 VTH1 VCC R2 VREF = 0.62V Figure 4. VCC Bar Graph Monitoring IN1 PWRGD1 IN2 MAX6709 PWRGD2 R1 OUT INPUT PWRGD4 PWRGD3 IN3 VTH4 R4 PWRGD4 IN4 GND R3 VTH4 = 1 + R4 VREF R3 ( OUT ) ∆VTH Figure 5. Window Detection resistors are not required when using the MAX6709/ MAX6714 because hysteresis is built into the device. MAX6709/MAX6714 hysteresis is typically 0.3% of the threshold voltage. Undervoltage Detection Circuit The open-drain outputs of the MAX6709/MAX6714 can be configured to detect an undervoltage condition. Figure 3 shows a configuration where an LED turns on when the comparator output is low, indicating an undervoltage condition. The MAX6709/MAX6714 can also be used in applications such as system supervisory monitoring, multivoltage level detection, and V CC bar graph monitoring (Figure 4). Figure 6. Output Response of Window Detector Circuit Window Detection A window detector circuit uses two auxiliary inputs in a configuration such as the one shown in Figure 5. External resistors R1–R4 set the two threshold voltages (VTH1 and VTH4) of the window detector circuit. Window width (∆VTH) is the difference between the threshold voltages (Figure 6). Adjustable Input The MAX6709 offers several monitor options with adjustable reset thresholds. The MAX6714 has three monitored inputs with adjustable thresholds. The threshold voltage at each adjustable IN_ (PFI_) input is typically 0.62V. To monitor a voltage >0.62V, connect a resistordivider network to the circuit as shown in Figure 7. VINTH = 0.62V ✕ (R1 + R2) / R2 _______________________________________________________________________________________ 9 MAX6709/MAX6714 Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package Or, solved in terms of R1: R1 = R2 ((VINTH / 0.62V) - 1) noisy environment, connecting a 0.1µF capacitor from MR to GND provides additional noise immunity. Reseting the µP from a 2nd Voltage (MAX6714) The MAX6714 can be configured to assert a reset from a second voltage by connecting the power-fail output to manual reset. As the VPFI_ falls below its threshold, PFO goes low and asserts the reset output for the reset timeout period after the manual reset input is deasserted. (See Typical Operating Circuit.) VINTH R1 R2 Power-Supply Bypassing and Grounding The MAX6709/MAX6714 operate from a single 2.0V to 5.5V supply. In noisy applications, bypass VCC with a 0.1µF capacitor as close to VCC as possible. VREF = 0.62V R1 = R2 VINTH - 1) ( 0.62V VCC VTH_ Figure 7. Setting the Auxiliary Monitor VTH_ Unused Inputs The unused inputs (except the adjustable) are internally connected to ground through the lower resistors of the threshold-setting resistor pairs. The adjustable input, however, must be connected to ground if unused. RESET 90% Reset Output The MAX6714 RESET output asserts low when V CC drops below its specified threshold or MR asserts low and remains low for the reset timeout period (140ms min) after VCC exceeds its threshold and MR deasserts (Figure 8). The output is open drain with a weak (10µA) internal pullup to VCC. For many applications, no external pullup resistor is required to interface with other logic devices. An external pullup resistor to any voltage from 0 to 5.5V overdrives the internal pullup if interfacing to different logic supply voltages (Figure 9). Internal circuitry prevents reverse current flow from the external pullup voltage to VCC. 10% tRP tRD Figure 8. RESET Output Timing Diagram VCC = 3.3V 5V 100kΩ VCC VCC Manual Reset Input Many µP-based products require manual reset capability, allowing the operator, a test technician, or external logic circuitry to initiate a reset. A logic low on MR asserts RESET low. RESET remains asserted while MR is low, and during the reset timeout period (140ms min) after MR returns high. The MR input has an internal 20kΩ pullup resistor to VCC, so it can be left open if unused. Drive MR with TTL or CMOS-logic levels, or with opendrain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual reset function; external debounce circuitry is not required. If MR is driven from long cables or if the device is used in a 10 RESET RESET MAX6714 GND GND Figure 9. Interfacing to Different Logic Supply Voltage ______________________________________________________________________________________ Low-Voltage, High-Accuracy Quad, Voltage Monitors in µMAX Package Selector Guide (MAX6714) NOMINAL INPUT VOLTAGE NOMINAL INPUT VOLTAGE PART IN1 (V) IN2 (V) IN3 (V) IN4 (V) SUPPLY TOLERANCE (%) PART VCC (V) PFI1 (V) PFI2 (V) PFI3 (V) SUPPLY TOLERANCE (%) 10 MAX6709AUB 5 3.3 2.5 Adj* 10 MAX6714AUB 5 Adj* Adj* Adj* MAX6709BUB 5 3.3 2.5 Adj* 5 MAX6714BUB 5 Adj* Adj* Adj* 5 MAX6709CUB 5 3.3 1.8 Adj* 10 MAX6714CUB 3.3 Adj* Adj* Adj* 10 MAX6709DUB 5 3.3 1.8 Adj* 5 MAX6714DUB 3.3 Adj* Adj* Adj* 5 MAX6709EUB Adj* 3.3 2.5 1.8 10 MAX6709FUB Adj* 3.3 2.5 1.8 5 MAX6709GUB 5 3.3 Adj* Adj* 10 MAX6709HUB 5 3.3 Adj* Adj* 5 MAX6709IUB Adj* 3.3 2.5 Adj* 10 MAX6709JUB Adj* 3.3 2.5 Adj* 5 MAX6709KUB Adj* 3.3 1.8 Adj* 10 MAX6709LUB Adj* 3.3 1.8 Adj* 5 MAX6709MUB Adj* 3 Adj* Adj* 10 MAX6709NUB Adj* 3 Adj* Adj* 5 MAX6709OUB Adj* Adj* Adj* Adj* N/A *Adjustable voltage based on 0.62V internal threshold. External threshold voltage can be set using an external resistor-divider. *Adjustable voltage based on 0.62V internal threshold. External threshold voltage can be set using an external resistor-divider. Pin Configurations (continued) TOP VIEW MR 1 PFI1 10 VCC 2 MAX6714 9 RESET PFI2 3 8 PFO1 PFI3 4 7 PFO2 GND 5 6 PFO3 µMAX Chip Information TRANSISTOR COUNT: 1029 PROCESS: BiCMOS ______________________________________________________________________________________ 11 MAX6709/MAX6714 Selector Guide (MAX6709) Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package MAX6709/MAX6714 Typical Operating Circuit (MAX6709) 2.0V TO 5.5V (MAY BE ONE OF THE MONITORED VOLTAGES) VCC IN1 SUPPLIES TO BE MONITORED IN2 PWRGD1 MAX6709 PWRGD2 IN3 PWRGD3 IN4 PWRGD4 SYSTEM LOGIC µP GND Typical Operating Circuit (MAX6714) 3.3V SUPPLY 5V SUPPLY VCC 9V SUPPLY VCC RESET PFI1 MR PFI2 MAX6714 PFI3 VBATT RESET PFO1 µP PFO2 I/O PFO3 I/O GND 12 ______________________________________________________________________________________ Low-Voltage, High-Accuracy, Quad Voltage Monitors in µMAX Package 10LUMAX.EPS 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX6709/MAX6714 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)