MAX6709HUB Maxim Integrated, MAX6709HUB Datasheet - Page 7

• Manufacturer Part Number: MAX6709HUB
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6709, MAX6714r

Specifications of MAX6709HUB

• Number Of Voltages Monitored: 4
• Monitored Voltage: 1.8 V, 2.5 V, 3 V, 3.3 V, 5 V
• Undervoltage Threshold: 4.25 V, 2.85 V, 2.13 V, Adjustable
• Overvoltage Threshold: 4.5 V, 3 V, 2.25 V, Adjustable
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 85 C
• Package / Case: uMAX
• Maximum Power Dissipation: 444 mW
• Minimum Operating Temperature: - 40 C
• Supply Current (typ): 35 uA
• Supply Voltage - Min: 2 V

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 comput-
ers, 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 V
interface easily with other logic devices. The weak inter-
nal pullups can be overdriven by external pullups to any
voltage from 0 to 5.5V. Internal circuitry prevents current
Figure 1. MAX6709 Functional Diagram
(3.3V/3.0V)
(2.5V/1.8V)
Low-Voltage, High-Accuracy Quad, Voltage
(ADJ)
(ADJ)
IN1
IN2
IN3
IN4
_______________________________________________________________________________________
Detailed Description
REFERENCE
0.62V
CC
, allowing them to
UNDERVOLTAGE
LOCKOUT
Monitors in µMAX Package
V
CC
flow from the external pullup voltage to V
puts can be wire-ORed for a single power-good signal.
The MAX6709 quad voltage monitor includes an accu-
rate reference, four precision comparators, and a
series of internally trimmed resistor-divider networks to
set the factory-fixed threshold options. The resistor net-
works 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 specifica-
tions, depending on the selected version. Additional
high-input-impedance comparator options can be used
MAX6709
V
V
V
V
CC
CC
CC
CC
PWRGD1
PWRGD2
PWRGD3
PWRGD4
CC
. The out-
7