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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6871 Datasheet

EEPROM-Programmable Hex/Quad Power-Supply Sequencers/Supervisors

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19-3384; Rev 1; 9/04
EVAALVUAAILTAIOBNLEKIT
EEPROM-Programmable Hex/Quad
Power-Supply Sequencers/Supervisors with ADC
General Description
The MAX6870/MAX6871 EEPROM-configurable, multi-
voltage supply sequencers/supervisors monitor several
voltage detector inputs, two auxiliary inputs, and four
general-purpose logic inputs. The MAX6870/MAX6871
feature programmable outputs for highly configurable
power-supply sequencing applications. The MAX6870
features six voltage detector inputs and eight program-
mable outputs, while the MAX6871 features four voltage
detector inputs and five programmable outputs. Manual
reset and margin disable inputs offer additional flexibility.
All voltage detectors offer two configurable thresholds
for undervoltage/overvoltage or dual undervoltage
detection. One high voltage input (IN1) provides detec-
tor threshold voltages from +2.5V to +13.2V in 50mV
increments, or from +1.25V to +7.625V in 25mV incre-
ments. A bipolar input (IN2) provides detector threshold
voltages from ±2.5V to ±15.25V in 50mV increments, or
from ±1.25V to ±7.625V in 25mV increments. Positive
inputs (IN3–IN6) provide detector threshold voltages
from +1V to +5.5V in 20mV increments, or from +0.5V
to +3.05V in 10mV increments.
Programmable output stages control power-supply
sequencing or system resets/interrupts. Programmable
output options include: active-high, active-low, open-
drain, weak pullup, push-pull, and charge pump.
Programmable timing delay blocks configure each output
to wait between 25µs and 1600ms before deasserting. A
fault register logs the condition that caused each output
to assert (undervoltage, overvoltage, manual reset, etc.).
An internal 10-bit ADC monitors the voltage detector
inputs, and two auxiliary inputs through a multiplexer
that automatically sequences through all inputs every
200ms. A SMBusTM-/I2CT-compatible, serial data inter-
face programs and communicates with the configuration
EEPROM, the configuration registers, the internal 4kb
user EEPROM, the ADC registers, and the fault registers
of the MAX6870/MAX6871.
The MAX6870/MAX6871 are available in a 7mm x 7mm
x 0.8mm 32-pin thin QFN package and operate over
the extended -40°C to +85°C temperature range.
Applications
Telecommunications/Central Office Systems
Networking Systems
Servers/Workstations
Basestations
Storage Equipment
Multimicroprocessor/Voltage Systems
Pin Configurations, Typical Operating Circuit, and Selector
Guide appear at end of data sheet.
Features
Six (MAX6870) or Four (MAX6871) Configurable
Input Voltage Detectors
One High Voltage Input (+1.25V to +7.625V or
+2.5V to +13.2V Thresholds)
One Bipolar Voltage Input (±1.25V to ±7.625V
or ±2.5V to ±15.25V Thresholds)
Four (MAX6870) or Two (MAX6871) Positive
Voltage Inputs (+0.5V to +3.05V or +1V to
+5.5V Thresholds)
Four General-Purpose Logic Inputs
Two Configurable Watchdog Timers
Eight (MAX6870) or Five (MAX6871)
Programmable Outputs
Active-High, Active-Low, Open-Drain, Weak
Pullup, Push-Pull, Charge-Pump
Timing Delays from 25µs to 1600ms
10-Bit Internal ADC Monitors the Input Voltage
Detectors and Two Auxiliary Inputs
Margining Disable and Manual Reset Controls
Internal 1.25V Reference or External Reference
Input
4kb Internal User EEPROM
Endurance: 100,000 Erase/Write Cycles
Data Retention: 10 Years
I2C/SMBus-Compatible Serial
Configuration/Communication Interface
±1% Threshold Accuracy
Ordering Information
PART
MAX6870ETJ
MAX6871ETJ
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
32 Thin QFN
32 Thin QFN
PKG
CODE
T3277-2
T3277-2
SMBus is a trademark of Intel Corp.
________________________________________________________________ Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6871 Datasheet

EEPROM-Programmable Hex/Quad Power-Supply Sequencers/Supervisors

No Preview Available !

EEPROM-Programmable Hex/Quad
Power-Supply Sequencers/Supervisors with ADC
ABSOLUTE MAXIMUM RATINGS
All Voltages referenced to GND
IN3IN6, ABP, SDA, SCL, A0, A1,
GPI1GPI4, MR, MARGIN, PO5PO8
(MAX6870), PO3/PO4/PO5 (MAX6871)............-0.3V to +6V
IN1, PO1PO4 (MAX6870), PO1/PO2 (MAX6871)....-0.3V to +14V
IN2 ...........................................................................-20V to +20V
DBP, AUXIN1, AUXIN2, REFIN.................................-0.3V to +3V
Input/Output Current (all pins)..........................................±20mA
Continuous Power Dissipation (TA = +70°C)
32-Pin 7mm x 7mm Thin QFN
(derate 33.3mW/°C above +70°C) .............................2667mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +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
(VIN1 = +6.5V to +13.2V, VIN2 = +10V, VIN3 to VIN6 = +2.7V to +5.5V, AUXIN_ = GPI_ = GND, MARGIN = MR = DBP, TA = -40°C to
+85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1 and 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Operating Voltage Range
(Note 3)
IN1 Supply Voltage
(Note 3)
VIN1
VIN3 to
VIN6
VIN1P
Voltage on IN1 to ensure the device is fully
operational, IN3 to IN6 = GND
Voltage on any one of IN3 to IN6 to ensure
the device is fully operational, IN1 = GND
Minimum voltage on IN1 to guarantee that the
device is powered through IN1
4.0
2.7
13.2
V
5.5
6.5 V
Undervoltage Lockout
Supply Current
Threshold Range
Threshold Accuracy
Threshold Hysteresis
Reset Threshold Temperature
Coefficient
VUVLO
Minimum voltage on one of IN3 to IN6 to
guarantee the device is EEPROM configured.
2.5 V
VIN1 = +13.2V, IN2 to IN6 = GND, no load
ICC Writing to configuration registers or EEPROM,
no load
1.2 1.5
mA
1.3 2
VIN1 (50mV increments)
2.5 13.2
VIN1 (25mV increments)
1.250
7.625
VTH
VIN2 (50mV increments)
VIN2 (25mV increments)
±2.50
±1.250
±15.25
±7.625
V
VIN3 to VIN6 (20mV increments)
1.0 5.5
VIN3 to VIN6 (10mV increments)
0.50 3.05
IN1 to IN6 positive,
TA = +25°C
-1.0
+1.0
VIN_ falling
-15.25V VIN2 -5V,
VIN2 falling
TA = -40°C to +85°C
TA = +25°C
TA = -40°C to +85°C
-1.5
-1.5
-2
+1.5
+1.5
+2
%
-5V VIN2 0, VIN2
falling
TA = +25°C
TA = -40°C to +85°C
-75
-100
+75
+100
mV
VTH-HYST
0.3 % VTH
VTH/°C
10
ppm/
°C
Threshold-Voltage Differential
Nonlinearity
VTH DNL
-1 +1 LSB
2 _______________________________________________________________________________________


Part Number MAX6871
Description EEPROM-Programmable Hex/Quad Power-Supply Sequencers/Supervisors
Maker Maxim Integrated Products
PDF Download

MAX6871 Datasheet PDF






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