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Pericom Semiconductor Corporation

PT7M6709 Datasheet Preview

PT7M6709 Datasheet

Multi-voltage Supervisor

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PT7M6709/6714
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Multi-voltage Supervisor
Features
Description
Monitor 4 Power-Supply Voltages
Factory-trimmed or User-Adjustable Threshold
Options:
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 typical
PT7M6714: 20μA typical
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°C to + 85°C Operating Temperature Range
Small MSOP-10 Package
Pin Configuration
PT7M6709
1 IN1 Vcc 10
2 IN2 PWRGD1 9
3 IN3 PWRGD2 8
4 IN4 PWRGD3 7
5 GND PWRGD4 6
MSOP
PT7M6714
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°C to + 85°C)
temperature range.
1 MR Vcc 10
2 PFI1 RESET 9
3 PFI2 PFO1 8
4 PFI3 PFO2 7
5 GND PFO3 6
Applications
Tele-communications
Servers
High-End Printers
Desktop and Notebook Computers
Data Storage Equipment
Networking Equipment
Multi-voltage Systems
MSOP
12-07-0002
PT0235-2
07/05/12
1




Pericom Semiconductor Corporation

PT7M6709 Datasheet Preview

PT7M6709 Datasheet

Multi-voltage Supervisor

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PT7M6709/6714
Multi-voltage Supervisor
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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
6
PWRGD4
O
Output 4. PWRGD4 asserts low when IN4 falls below its threshold voltage.
PWRGD4 is open drain with a 10μA internal pull-up current source to Vcc.
7
PWRGD3
O
Output 3. PWRGD3 asserts low when IN3 falls below its threshold voltage.
PWRGD3 is open drain with a 10μA internal pull-up current source to Vcc.
8
PWRGD2
O
Output 2. PWRGD2 asserts low when IN2 falls below its threshold voltage.
PWRGD2 is open drain with a 10μA internal pull-up current source to Vcc.
9
PWRGD1
O
Output 1. PWRGD1 asserts low when IN1 falls below its threshold voltage.
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
Description
1 MR I 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
2 PFI1 I 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
3 PFI2 I 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
4 PFI3 I an internal 0.62V reference. Use an external resistor-divider network to adjust the monitor
threshold.
5 GND P Ground
6 PFO3 O 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.
7
PFO2
O
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.
8
PFO1
O
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.
9
RESET
O
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.
10 VCC P Supply Voltage. RESET asserts low when Vcc drops below its threshold.
12-07-0002
PT0235-2
07/05/12
2


Part Number PT7M6709
Description Multi-voltage Supervisor
Maker Pericom Semiconductor Corporation
Total Page 12 Pages
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