MAX6884ETP MAXIM [Maxim Integrated Products], MAX6884ETP Datasheet - Page 9

• Manufacturer Part Number: MAX6884ETP
• Description: EEPROM-Programmable, Hex Power-Supply Supervisory Circuits
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX6884/MAX6885 EEPROM-configurable, multi-
voltage supply supervisors monitor six voltage-detector
inputs, one auxiliary input, and one watchdog input,
and feature three programmable outputs for highly con-
figurable, power-supply monitoring applications (see
Table
margin disable inputs offer additional flexibility.
Each voltage detector provides a programmable pri-
mary undervoltage and secondary undervoltage/over-
voltage threshold. Program thresholds from 0.5V to
3.05V in 10mV increments, 1.0V to 5.8V in 20mV incre-
ments, or from 0.1667V to 1.0167V in 3.3mV incre-
ments. To achieve thresholds from 0.1667V to 1.0167V
in 3.3mV increments, the respective input voltage
detector must be programmed for high impedance
and an external voltage-divider must be connected. A
fault register logs undervoltage and overvoltage condi-
tions for each voltage-detector input.
MAX6884
18
19
20
—
1 for programmable features). Manual reset and
PIN
MAX6885
18
19
20
—
_______________________________________________________________________________________
Detailed Description
NAME
IN3
IN2
IN1
EP
Power-Supply Supervisory Circuits
Voltage-Detector Input 3. Program two thresholds per voltage-detector input
(undervoltage UV and undervoltage/overvoltage UV/OV). Program IN3 detector
thresholds from 1V to 5.8V in 20mV increments, or 0.5V to 3.05V in 10mV increments.
For improved noise immunity, bypass IN3 to GND with a 0.1µF capacitor installed as
close to the device as possible. Program the device to receive power through IN1–IN4
inputs or V
Voltage-Detector Input 2. Program two thresholds per voltage-detector input
(undervoltage UV and undervoltage/overvoltage UV/OV). Program IN2 detector
thresholds from 1V to 5.8V in 20mV increments, or 0.5V to 3.05V in 10mV increments.
For improved noise immunity, bypass IN2 to GND with a 0.1µF capacitor installed as
close to the device as possible. Program the device to receive power through IN1–IN4
inputs or V
Voltage-Detector Input 1. Program two thresholds per voltage-detector input
(undervoltage UV and undervoltage/overvoltage UV/OV). Program IN1 detector
thresholds from 1V to 5.8V in 20mV increments, or 0.5V to 3.05V in 10mV increments.
For improved noise immunity, bypass IN1 to GND with a 0.1µF capacitor installed as
close to the device as possible. Program the device to receive power through IN1–IN4
inputs or V
Exposed Paddle. Internally connected to GND. Connect EP to GND or leave floating.
EEPROM-Programmable, Hex
CC
CC
CC
(see the Powering the MAX6884/MAX6885 section).
(see the Powering the MAX6884/MAX6885 section).
(see the Powering the MAX6884/MAX6885 section).
An internal 10-bit ADC (MAX6884 only) converts volt-
ages at IN1–IN6, AUXIN, and V
er that automatically sequences through all inputs
every 200ms. Access the device’s internal 512-bit user
EEPROM, configuration EEPROM, configuration regis-
ters, ADC registers, and fault registers through an
SMBus/I
SMBus/I
MAX6884/MAX6885 also feature an accurate internal
1.25V reference. For greater accuracy, connect an
external 1.25V reference to REFIN (MAX6884 only).
Program outputs RESET, UV/OV, and WDO for open-
drain or weak pullup. Program RESET and UV/OV to
assert on any voltage-detector input, MR, or each other.
RESET can also depend on WDO. Programmable timing
delay blocks configure each output to wait between
25µs and 1600ms before deasserting. Fault registers log
the assertion of RESET, UV/OV, and WDO.
2
2
C-Compatible Serial Interface section). The
C-compatible serial interface (see the
FUNCTION
Pin Description (continued)
CC
through a multiplex-
9