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PT7M6709/6714
Multi-voltage Supervisor
Features
Monitor 4 Power-Supply Voltages
Factory-trimmed or User-Adjustable Threshold
Options:
Description
The PT7M6709/6714 quad voltage monitors provide
accurate monitoring of up to four supplies without any
external components. A variety of factory-trimmed
threshold voltages and supply tolerance are available to
optimize the PT7M6709/6714 for specific applications.
The selection includes input options for monitoring 5.0V,
3.3V, 3.0V, 2.5V and 1.8V voltages. Additional high-
input impedance comparator options can be used as
adjustable voltage monitors, general-purpose compare-
ators, or digital-level translators.
The PT7M6709 provides four independent open-drain
outputs with 10μA internal pull-up to Vcc. The
PT7M6714 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 PT7M6709 consumes only 15μA (typical) of supply
current. The PT7M6714 consumes only 20μA (typical)
of supply current. The PT7M6709/6714 operates with
supply voltages of 2.0V to 5.5V. An internal under-
voltage lockout circuit forces all four digital outputs low
when Vcc drops below the minimum operating voltage.
The four digital outputs have weak internal pull-ups to
Vcc, accommodating wire-ORed connections. Each
input threshold voltage has an independent output. The
PT7M6709/6714 are available in MSOP-10 packages
and operate over the extended (-40° to + 85°
C
C)
temperature range.
Factory-trimmed Thresholds for 5.0V, 3.3V, 3.0V,
2.5V and 1.8V supplies
User-adjustable Threshold monitors down to
0.62V
Low Current:
PT7M6709: 15μA typ
ical
PT7M6714: 20μA typ
ical
4 Independent, Active Low, and Open-Drain outputs
with 10μA internal Pull-up to Vcc
140ms Minimum Reset Timeout Period (PT7M6714
only)
Immune to Battery Voltage Transients
2.0V to 5.5V Supply Voltage Range
-40° to + 85° Operating Temperature Range
C
C
Small MSOP-10 Package
Pin Configuration
PT7M6709
1
2
3
4
5
IN1
IN2
IN3
IN4
GND
Vcc 10
PWRGD1 9
PWRGD2 8
PWRGD3 7
PWRGD4 6
MSOP
PT7M6714
1
2
3
4
5
MR
PFI1
PFI2
PFI3
GND
Vcc 10
RESET 9
PFO1
PFO2
PFO3
MSOP
Applications
Tele-communications
Servers
High-End Printers
Desktop and Notebook Computers
Data Storage Equipment
Networking Equipment
Multi-voltage Systems
8
7
6
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PT7M6709/6714
Multi-voltage Supervisor
Pin Description
Table 3 Pin description of PT7M6709
Pin
Name
Type
Description
1
IN1
I
Input voltage 1
2
IN2
I
Input voltage 2
3
IN3
I
Input voltage 3
4
IN4
I
Input voltage 4
5
GND
P
Ground
Output 4. PWRGD4 asserts low when IN4 falls below its threshold voltage.
6
PWRGD4
O
PWRGD4 is open drain with a 10μA internal pull-up current source to Vcc.
Output 3. PWRGD3 asserts low when IN3 falls below its threshold voltage.
7
PWRGD3
O
PWRGD3 is open drain with a 10μA internal pull-up current source to Vcc.
Output 2. PWRGD2 asserts low when IN2 falls below its threshold voltage.
8
PWRGD2
O
PWRGD2 is open drain with a 10μA internal pull-up current source to Vcc.
Output 1. PWRGD1 asserts low when IN1 falls below its threshold voltage.
9
PWRGD1
O
PWRGD1 is open drain with a 10μA internal pull-up current source to Vcc.
Supply Voltage. An undervoltage lockout circuit forces all PWRGD_outputs
10
VCC
P
low when Vcc drops below the minimum operating voltage. Vcc is not a
monitored voltage.
Table 4 Pin description of PT7M6714
Pin
Name Type
1
2
MR
I
I
Description
PFI1
3
PFI2
I
4
5
6
7
8
PFI3
GND
PFO3
I
P
O
O
O
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
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.
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.
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.
Ground
Power-Fail output 3. PFO3 asserts low when PFI3 is below the selected threshold. PFO3 is an
active-low, open drain output with a 10μA internal pull-up to Vcc.
Power-Fail output 2. PFO2 asserts low when PFI2 is below the selected threshold. PFO2 is an
active-low, open drain output with a 10μA internal pull-up to Vcc.
Power-Fail output 1. PFO1 asserts low when PFI1 is below the selected threshold. PFO1 is an
active-low, open drain output with a 10μA internal pull-up to Vcc.
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.
Supply Voltage. RESET asserts low when Vcc drops below its threshold.
PFO2
PFO1
RESET
VCC
9
10
O
P
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PT7M6709/6714
Multi-voltage Supervisor
Block Diagram
Fig.4 Block diagram of PT7M6709
Fig.5 Block diagram of PT7M6714
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PT7M6709/6714
Multi-voltage Supervisor
Maximum Ratings
Storage Temperature ...............................................-65oC to +150oC
Ambient Temperature with Power Applied..............-40oC to +85oC
Supply Voltage to Ground Potential (Vcc to GND) ...-0.3V to +6.0V
DC Input/Output Current (All pins) ..........................................20mA
Power Dissipation .............................. 444mW (Depend on package)
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
DC Electrical Characteristics
PT7M6709
(V
CC
= 2.0V to 5.5V, T
A
= -40~+85º unless otherwise noted. Typical values are at V
CC
= 5V and T
A
= +25º
C,
C)*1
Description
Supply Voltage Range
Supply Current
Input Current
Sym
V
CC
I
CC
I
IN_
-
V
CC
= 3V
V
CC
= 5V
V
IN_
=input threshold voltage
V
IN_
=0 to 0.85V(for adjustable threshold )
5.0V (-5%)
5.0V (-10%)
3.3V (-5%)
3.3V (-10%)
Threshold Voltage
V
TH
IN_ decreasing
3.0V (-5%)
3.0V (-10%)
2.5V (-5%)
2.5V (-10%)
1.8V (-5%)
1.8V (-10%)
Adjustable Threshold
Threshold Hysteresis
Threshold Voltage
Temperature coefficient
Output High Voltage
V
TH
V
HYST
TCV
TH
V
OH
IN_ decreasing
-
-
V
CC
≥ 2.0V, I
source
= 6μA(min),
PWRGD_ unasserted
V
CC
= 5V, I
sink
= 2mA
V
CC
= 2.5V, I
sink
= 1.2mA
V
CC
= 1V, I
sink
= 50A*2
Output High Source
Current
I
OH
V
CC
≥ 2.0V, PWRGD_ unasserted
Test Conditions
Min
2.0
-
-
-
-
4.50
4.25
3.00
2.85
2.70
2.55
2.25
2.13
1.62
1.53
0.609
-
-
0.8×
Vcc
-
-
-
-
Typ
-
15
20
5
-
4.63
4.38
3.08
2.93
2.78
2.63
2.32
2.19
1.67
1.58
0.623
0.3×
TH
V
60
-
-
-
-
10
Max
5.5
25
30
10
0.2
4.75
4.50
3.15
3.00
2.85
2.70
2.38
2.25
1.71
1.62
0.635
-
-
-
0.3
0.3
0.3
-
A
V
V
%
ppm
/º
C
V
V
Unit
V
µA
µA
Output Low Voltage
V
OL
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PT7M6709/6714
Multi-voltage Supervisor
PT7M6714
(V
CC
= 2.0V to 5.5V, T
A
= -40~+85º unless otherwise noted. Typical values are at V
CC
= 5V and T
A
= +25º
C,
C)*1
Description
Supply Voltage Range
Supply Current
*3
Power-Fail
Input Current
Sym
V
CC
I
CC
I
PFI_
-
V
CC
= 3V
V
CC
= 5V
V
PFI_
=0 to 0.85V
PT7M6714B (-5%)
V
CC
Reset Threshold
V
TH
V
CC
decreasing
PT7M6714A (-10%)
PT7M6714D (-5%)
PT7M6714C (-10%)
Power-Fail
input Threshold
Threshold Hysteresis
V
PFI
V
PFI
_ decreasing
V
PFI
_ increasing relative to
V
PFI
_ decreasing
-
-
MR to V
CC
V
CC
≥ 2.0V, I
source
= 6A(min),
RESET, PFO_ unasserted
V
CC
= 5V, I
sink
= 2mA
V
CC
= 2.5V, I
sink
= 1.2mA
V
CC
= 1V, I
sink
= 50A*2
Test Conditions
Min
2.0
-
-
-
4.50
4.25
3.00
2.85
0.609
Typ
-
20
30
-
4.63
4.38
3.08
2.93
0.623
Max
5.5
35
45
0.2
4.75
4.50
3.15
3.00
0.635
V
V
Unit
V
µA
µA
V
HYST
V
IL
V
IH
-
-
0.7×
Vcc
10
0.8×
Vcc
-
-
-
0.3×
TH
V
-
-
20
-
-
-
-
-
0.3×
Vcc
-
50
-
0.3
0.3
0.3
%
MR Input Voltage
MR Pull-up Resistance
Output High Voltage
V
kΩ
V
V
OH
Output Low Voltage
V
OL
V
Output High Source
I
OH
V
CC
≥ 2.0V, RESET and PFO_ unasserted
-
10
-
A
Current
Note:
*1:
100% production tested at T
A
= +25º Over temperature limits are guaranteed by design.
C.
*2:
Conditions at V
CC
= 1V is guaranteed only from T
A
= 0º to +70º
C
C.
*3:
Monitored voltage 5V/3.3V is also the device supply. In the typical condition, supply current splits as follows:25A for the
resistor-divider, and the rest is for other circuitry.
12-07-0002
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PT0235-2
07/05/12
PCB设计
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