19-2379; Rev 1; 12/05
Low-Voltage, High-Accuracy, Quad Voltage
Monitors in µMAX Package
Features
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.
♦ Monitor Four Power-Supply Voltages
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 VCC ,
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.
♦ 140ms (min) Reset Timeout Period
(MAX6714 only)
Applications
♦ 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
♦ 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.
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
Pin Configurations
Telecommunications
Servers
High-End Printers
Desktop and Notebook Computers
TOP VIEW
Data Storage Equipment
IN1 1
Networking Equipment
IN2
2
Multivoltage Systems
IN3
3
IN4
GND
Typical Operating Circuits appear at end of data sheet.
Selector Guides appear at end of data sheet.
10 VCC
9
PWRGD1
8
PWRGD2
4
7
PWRGD3
5
6
PWRGD4
MAX6709
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
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_
Threshold Voltage
VTH
CONDITIONS
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)
IN_ decreasing
0.2
5.0V (-5%)
4.50
4.63
4.75
5.0V (-10%)
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
IN_ decreasing
1.53
1.58
1.62
0.609
0.623
0.635
µA
µA
V
V
Threshold Voltage Temperature
Coefficient
TCVTH
60
ppm/°C
Threshold Hysteresis
VHYST
0.3 x VTH
%
Propagation Delay
Output Low Voltage
2
VTH
TYP
2.0
1.8V (-10%)
Adjustable Threshold
MIN
tPD
VOL
VIN_ falling at 10mV/µs from
VTH to (VTH - 50mV)
30
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
Output High Voltage
VOH
VCC ≥ 2.0V, ISOURCE = 6µA (min), PWRGD_
unasserted
Output High Source Current
IOH
VCC ≥ 2.0V, PWRGD_ unasserted
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
SYMBOL
Supply Voltage Range
VCC
Supply Current (Note 3)
ICC
Power-Fail Input Current
IPFI_
CONDITIONS
60
90
105
VPFI_ = 0 to 0.85V
VPFI
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%)
Reset Delay
tRD
Power-Fail Propagation Delay
tPFD
2.85
2.93
3.00
0.609
0.623
0.635
VPFI_ increasing relative to VPFI_ decreasing
0.3 x VTH
140
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
tMRD
Output Low Voltage
VOL
10
20
0.3
VCC = 2.5V, ISINK = 1.2mA
0.3
VCC = 1V, ISINK = 50µA (Note 2)
0.3
VOH
VCC ≥ 2.0V, ISOURCE = 6mA (min), RESET,
PFO_ unasserted
Output High Source Current
IOH
VCC ≥ 2.0V, RESET and PFO_ unasserted
V
ns
50
VCC = 5V, ISINK = 2mA
Output High Voltage
ms
ns
200
MR to VCC
V
µs
100
MR Pullup Resistance
V
µs
1
MR Glitch Rejection
MR to RESET Delay
280
0.7 x VCC
MR Minimum Input Pulse
µA
%
0.3 x VCC
VIH
µA
µs
VIL
MR Input Voltage
V
80
Power-Fail Input Threshold
tRP
UNITS
5.5
VCC = 5V
VCC decreasing
Reset Timeout Period
MAX
VCC = 3V
VTH
VHYST
TYP
2.0
VCC Reset Threshold
Threshold Hysteresis
MIN
0.8 x VCC
kΩ
V
V
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
40
RESET ASSERTS
ABOVE THIS LINE
10
0
0 100 200 300 400 500 600 700 800 900 1000
VCC OVERDRIVE (mV)
80
70
60
PFO_ ASSERTS
ABOVE THIS LINE
50
40
30
20
10
0
216
10
MAX6709/14 toc09
120
110
100
90
RESET TIMEOUT PERIOD (ms)
MAX6709/14 toc07
120
110
100
90
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
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
(VCC = 5V, TA = +25°C, unless otherwise noted.)
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)
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
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.
Ground
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 VCC 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 VCC
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
(%)
MAX6709AUB
5
3.3
2.5
Adj*
10
MAX6714AUB
5
Adj*
Adj*
Adj*
10
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
8
PFO1
PFI2
3
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
e
4X S
10
10
INCHES
H
Ø0.50±0.1
0.6±0.1
1
1
0.6±0.1
BOTTOM VIEW
TOP VIEW
D2
MILLIMETERS
MAX
DIM MIN
0.043
A
0.006
A1
0.002
A2
0.030
0.037
0.120
D1
0.116
0.118
0.114
D2
0.116
0.120
E1
0.118
E2
0.114
0.199
H
0.187
L
0.0157 0.0275
L1
0.037 REF
b
0.007
0.0106
e
0.0197 BSC
c
0.0035 0.0078
0.0196 REF
S
α
0°
6°
MAX
MIN
1.10
0.15
0.05
0.75
0.95
3.05
2.95
3.00
2.89
3.05
2.95
2.89
3.00
4.75
5.05
0.40
0.70
0.940 REF
0.177
0.270
0.500 BSC
0.090
0.200
0.498 REF
0°
6°
E2
GAGE PLANE
A2
c
A
b
A1
α
E1
D1
L
L1
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
APPROVAL
DOCUMENT CONTROL NO.
21-0061
REV.
1
1
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
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
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.)
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