MAX6874 Datasheet, PDF (1/40 Pages) Maxim Integrated Products – EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors

19-3438; Rev 0; 10/04
EVAALVUAAILTAIOBNLEKIT
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
General Description
The MAX6874/MAX6875 EEPROM-configurable, multi-
voltage supply sequencers/supervisors monitor several
voltage detector inputs and general-purpose logic
inputs, and provide programmable open-drain outputs
for highly configurable power-supply sequencing appli-
cations. The MAX6874 provides six voltage monitor
inputs, four general-purpose inputs, and eight program-
mable open-drain outputs. The MAX6875 provides four
voltage monitor inputs, three general-purpose inputs,
and five programmable open-drain outputs. Manual reset
and margin disable inputs provide additional flexibility.
All voltage detectors offer configurable thresholds for
undervoltage detection. One high-voltage input (IN1)
provides detector threshold voltages from +2.5V to
+13.2V in 50mV increments, or from +1.25V to +7.625V
in 25mV increments. A second positive input (IN2) pro-
vides detector threshold voltages from +2.5V to +5.5V
in 50mV increments, or from +1.25V to +3.05V in 25mV
increments. Positive inputs (IN3–IN6) provide detector
threshold voltages from +1V to +5.5V in 20mV incre-
ments, or from +0.5V to +3.05V in 10mV increments.
Programmable output stages control power-supply
sequencing or system resets/interrupts. Program the
open-drain outputs as active-high or active-low.
Programmable timing delay blocks configure each output
to wait between 25µs and 1600ms before deasserting.
An SMBus™/I²C-compatible serial data interface pro-
grams and communicates with the configuration EEP-
ROM, the configuration registers, and the internal 4kb
user EEPROM of the MAX6874/MAX6875.
The MAX6874/MAX6875 are available in a 7mm x 7mm
x 0.8mm 32-pin thin QFN package and operate over
the extended temperature range (-40°C to +85°C).
Features
♦ Six (MAX6874) or Four (MAX6875) Configurable
Input Voltage Detectors
One High Voltage Input (+1.25V to +7.625V or
+2.5V to +13.2V Thresholds)
One Voltage Input (+1.25V to +3.05V or
+2.5V to +5.5V)
Four (MAX6874) or Two (MAX6875) Positive
Voltage Inputs (+0.5V to +3.05V or +1V
to +5.5V)
♦ Four (MAX6874) or Three (MAX6875) General-
Purpose Logic Inputs
♦ Two Configurable Watchdog Timers
♦ Eight (MAX6874) or Five (MAX6875) Programmable
Open-Drain Outputs
Active-High or Active-Low
Timing Delays from 25µs to 1600ms
♦ Margining Disable and Manual Reset Controls
♦ 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
MAX6874 ETJ
MAX6875 ETJ
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
Applications
Telecommunications/Central Office Systems
Networking Systems
Servers/Workstations
Base Stations
Storage Equipment
Multimicroprocessor/Voltage Systems
SMBus is a trademark of Intel Corp.
Pin Configurations, Typical Operating Circuit, and Selector
Guide appear at end of data sheet.
________________________________________________________________ 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.