MAX16070 Datasheet, PDF (1/52 Pages) Maxim Integrated Products – 12-Channel/8-Channel, Flash-Configurable System Monitors with Nonvolatile Fault Registers

19-5003; Rev 3; 8/11
12-Channel/8-Channel, Flash-Configurable System
Monitors with Nonvolatile Fault Registers
General Description
The MAX16070/MAX16071 flash-configurable sys-
tem monitors supervise multiple system voltages. The
MAX16070/MAX16071 can also accurately monitor
(Q2.5%) one current channel using a dedicated high-
side current-sense amplifier. The MAX16070 monitors
up to twelve system voltages simultaneously, and the
MAX16071 monitors up to eight supply voltages. These
devices integrate a selectable differential or single-end-
ed analog-to-digital converter (ADC). Device configura-
tion information, including overvoltage and undervoltage
limits and timing settings are stored in nonvolatile flash
memory. During a fault condition, fault flags and channel
voltages can be automatically stored in the nonvolatile
flash memory for later read-back.
The internal 1% accurate 10-bit ADC measures each
input and compares the result to one overvoltage, one
undervoltage, and one early warning limit that can be
configured as either undervoltage or overvoltage. A fault
signal asserts when a monitored voltage falls outside the
set limits. Up to three independent fault output signals
are configurable to assert under various fault conditions.
Because the MAX16070/MAX16071 support a power-
supply voltage of up to 14V, they can be powered
directly from the 12V intermediate bus in many systems.
The MAX16070/MAX16071 include eight/six program-
mable general-purpose inputs/outputs (GPIOs). GPIOs
are flash configurable as dedicated fault outputs, as a
watchdog input or output, or as a manual reset.
The MAX16070/MAX16071 feature nonvolatile fault mem-
ory for recording information during system shutdown
events. The fault logger records a failure in the internal
flash and sets a lock bit protecting the stored fault data
from accidental erasure. An SMBus™ or a JTAG serial
interface configures the MAX16070/MAX16071. The
MAX16070/MAX16071 are available in a 40-pin, 6mm x
6mm, TQFN package. Both devices are fully specified
from -40NC to +85NC.
Applications
Networking Equipment
Telecom Equipment (Base Stations, Access)
Storage/RAID Systems
Servers
Features
S Operate from 2.8V to 14V
S ±2.5% Current-Monitoring Accuracy
S 1% Accurate 10-Bit ADC Monitors 12/8 Voltage
Inputs
S Single-Ended or Differential ADC for System
Voltage/Current Monitoring
S Integrated High-Side, Current-Sense Amplifier
S 12/8 Monitored Inputs with Overvoltage/
Undervoltage/Early Warning Limit
S Nonvolatile Fault Event Logger
S Two Programmable Fault Outputs and One Reset
Output
S Eight General-Purpose Inputs/Outputs
Configurable as:
Dedicated Fault Outputs
Watchdog Timer Function
Manual Reset
Margin Enable
S SMBus (with Timeout) or JTAG Interface
S Flash Configurable Time Delays and Thresholds
S -40NC to +85NC Operating Temperature Range
Ordering Information
PART
MAX16070ETL+
MAX16071ETL+
TEMP RANGE
-40NC to +85NC
-40NC to +85NC
PIN-PACKAGE
40 TQFN-EP*
40 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
SMBus is a trademark of Intel Corp.
Pin Configuration and Typical Operating Circuits appear at
end of data sheet.
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