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
(
Q
2.5%) 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.
S
Operate from 2.8V to 14V
S
±
2.5% Current-Monitoring Accuracy
S
1% Accurate 10-Bit ADC Monitors 12/8 Voltage
Features
MAX16070/MAX16071
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+
*EP
= Exposed pad.
TEMP RANGE
-40NC to +85NC
-40NC to +85NC
PIN-PACKAGE
40 TQFN-EP*
40 TQFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Applications
Networking Equipment
Telecom Equipment (Base Stations, Access)
Storage/RAID Systems
Servers
Pin Configuration and Typical Operating Circuits appear at
end of data sheet.
SMBus is a trademark of Intel Corp.
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
MAX16070/MAX16071
ABSOLUTE MAXIMUM RATINGS
V
CC
, CSP, CSM to GND........................................-0.3V to +15V
CSP to CSM..........................................................-0.7V to +0.7V
MON_, GPIO_, SCL, SDA, A0, RESET to GND
(programmed as open-drain outputs) .................-0.3V to +6V
EN, TCK, TMS, TDI to GND ....................................-0.3V to +4V
DBP, ABP to GND...-0.3V to the lower of +3V and (V
CC
+ 0.3V)
TDO, GPIO_, RESET
(programmed as push-pull outputs) .... -0.3V to (V
DBP
+ 0.3V)
Input/Output Current .........................................................20mA
Continuous Power Dissipation (T
A
= +70NC)
40-Pin TQFN (derate 26.3mW/NC above +70NC) .......2105mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature ....................................................+150NC
Storage Temperature Range............................ -65NC to +150NC
Lead Temperature (soldering, 10s)
................................+300NC
Soldering Temperature (reflow) ......................................+260NC
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
(V
CC
= 2.8V to 14V, T
A
= -40NC to +85NC, unless otherwise specified. Typical values are at V
ABP
= V
DBP
= V
CC
= 3.3V, T
A
= +25NC.)
(Note 1)
PARAMETER
Operating Voltage Range
Undervoltage Lockout (Rising)
Undervoltage Lockout Hysteresis
Minimum Flash Operating
Voltage
Supply Current
ABP Regulator Voltage
DBP Regulator Voltage
Boot Time
Flash Writing Time
Internal Timing Accuracy
EN Input Voltage
EN Input Current
Input Voltage Range
V
TH_EN_R
V
TH_EN_F
I
EN
SYMBOL
V
CC
V
UVLO
V
UVLO_HYS
V
flash
I
CC
V
ABP
V
DBP
t
BOOT
Minimum voltage on V
CC
to ensure flash
erase and write operations
No load on output pins
During flash writing cycle
C
ABP
= 1μF, no load, V
CC
= 5V
C
DBP
= 1μF, no load, V
CC
= 5V
V
CC
> V
UVLO
8-byte word
(Note 3)
EN voltage rising
EN voltage falling
1.365
-0.5
0
-8
1.41
1.39
1.415
+0.5
5.5
2.85
2.8
2.7
4.5
10
3
3
200
122
+8
7
14
3.15
3.1
350
(Note 2)
Minimum voltage on V
CC
to ensure the
device is flash configurable
100
CONDITIONS
Reset output asserted low
MIN
1.2
2.8
14
2.7
TYP
MAX
UNITS
V
V
mV
V
mA
V
V
μs
ms
%
V
μA
V
2
______________________________________________________________________________________
12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.8V to 14V, T
A
= -40NC to +85NC, unless otherwise specified. Typical values are at V
ABP
= V
DBP
= V
CC
= 3.3V, T
A
= +25NC.)
(Note 1)
PARAMETER
ADC DC ACCURACY
Resolution
Gain Error
Offset Error
Integral Nonlinearity
Differential Nonlinearity
ADC Total Monitoring Cycle Time
ADC IN_ Ranges
CURRENT SENSE
CSP Input-Voltage Range
Input Bias Current
CSP Total Unadjusted Error
Overcurrent Differential
Threshold
V
SENSE
Fault Threshold
Hysteresis
Secondary Overcurrent Threshold
Timeout
V
CSP
I
CSP
I
CSM
CSP
ERR
V
CSP
= V
CSM
(Note 4)
Gain = 48
OVC
TH
V
CSP
-
V
CSM
Gain = 24
Gain = 12
Gain = 6
OVC
HYS
r73h[6:5] = ‘00’
OVC
DEL
r73h[6:5] = ‘01’
r73h[6:5] = ‘10’
r73h[6:5] = ‘11’
Gain = 6
V
SENSE
Ranges
Gain = 12
Gain = 24
Gain = 48
V
SENSE
= 150mV (gain = 6 only)
ADC Current Measurement
Accuracy
V
SENSE
= 50mV, gain = 12
V
SENSE
= 25mV, gain = 24
V
SENSE
= 10mV, gain = 48
Gain Accuracy
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
CMRR
SNS
PSRR
SNS
V
SENSE
= 20mV to 100mV, V
CSP
= 5V,
gain = 6
V
CSP
> 4V
-1.5
80
80
-2.5
-4
3
12
50
21.5
46
94
190
25
51
101
202
0.5
0
4
16
64
232
116
58
29
Q0.2
Q0.2
Q0.5
Q1
+1.5
%
dB
dB
+2.5
+4
%
mV
5
20
60
ms
3
14
3
14
25
5
2
30.5
56
108
210
%OVC
TH
mV
V
μA
%FSR
ADC
GAIN
ADC
OFF
ADC
INL
ADC
DNL
t
CYCLE
No MON_ fault detected
1 LSB = 5.43mV
1 LSB = 2.72mV
1 LSB = 1.36mV
40
5.56
2.78
1.39
V
T
A
= +25°C
T
A
= -40°C to +85°C
10
0.35
0.70
1
1
1
50
Bits
%
LSB
LSB
LSB
μs
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX16070/MAX16071
_______________________________________________________________________________________
3
12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
MAX16070/MAX16071
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.8V to 14V, T
A
= -40NC to +85NC, unless otherwise specified. Typical values are at V
ABP
= V
DBP
= V
CC
= 3.3V, T
A
= +25NC.)
(Note 1)
PARAMETER
OUTPUTS (RESET, GPIO_)
I
SINK
= 2mA
Output-Voltage Low
V
OL
I
SINK
= 10mA, GPIO_ only
V
CC
= 1.2V, I
SINK
= 100μA (RESET only)
Maximum Output Sink Current
Output-Voltage High (Push-Pull)
Output Leakage (Open Drain)
SMBus INTERFACE
Logic-Input Low Voltage
Logic-Input High Voltage
Input Leakage Current
Output Sink Current
Input Capacitance
SMBus Timeout
INPUTS (A0, GPIO_)
Input Logic-Low
Input Logic-High
WDI Pulse Width
MR
Pulse Width
MR
to RESET Delay
MR
Glitch Rejection
SMBus TIMING
Serial Clock Frequency
Bus Free Time Between STOP
and START Condition
START Condition Setup Time
START Condition Hold Time
STOP Condition Setup Time
Clock Low Period
Clock High Period
Data Setup Time
f
SCL
t
BUF
t
SU:STA
t
HD:STA
t
SU:STO
t
LOW
t
HIGH
t
SU:DAT
1.3
0.6
0.6
0.6
1.3
0.6
100
V
IL
V
IH
t
WDI
t
MR
2.0
100
1
0.5
100
400
0.8
V
V
ns
μs
μs
ns
kHz
μs
μs
μs
μs
μs
μs
ns
V
OL
C
IN
t
TIMEOUT
SCL time low for reset
25
V
IL
V
IH
Input voltage falling
Input voltage rising
IN = GND or VCC
I
SINK
= 3mA
5
35
2.0
-1
+1
0.4
0.8
V
V
μA
V
pF
ms
Total current into RESET, GPIO_,
V
CC
= 3.3V
I
SOURCE
= 100μA
2.4
1
0.4
0.7
0.3
30
mA
V
μA
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4
______________________________________________________________________________________
12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.8V to 14V, T
A
= -40NC to +85NC, unless otherwise specified. Typical values are at V
ABP
= V
DBP
= V
CC
= 3.3V, T
A
= +25NC.)
(Note 1)
PARAMETER
Output Fall Time
Data Hold Time
Pulse Width of Spike Suppressed
JTAG INTERFACE
TDI, TMS, TCK Logic-Low Input
Voltage
TDI, TMS, TCK Logic-High Input
Voltage
TDO Logic-Output Low Voltage
TDO Logic-Output High Voltage
TDI, TMS Pullup Resistors
I/O Capacitance
TCK Clock Period
TCK High/Low Time
TCK to TMS, TDI Setup Time
TCK to TMS, TDI Hold Time
TCK to TDO Delay
TCK to TDO High-Z Delay
V
IL
V
IH
V
OL
V
OH
R
PU
C
I/O
t
1
t
2
, t
3
t
4
t
5
t
6
t
7
50
15
10
500
500
500
Input voltage falling
Input voltage rising
I
SINK
= 3mA
I
SOURCE
= 200μA
Pullup to DBP
2.4
40
50
5
1000
60
2
0.4
0.8
V
V
V
V
kω
pF
ns
ns
ns
ns
ns
ns
SYMBOL
t
OF
t
HD:DAT
t
SP
CONDITIONS
C
BUS
= 10pF to 400pF
From 50% SCL falling to SDA change
0.3
30
MIN
TYP
MAX
250
0.9
UNITS
ns
μs
ns
MAX16070/MAX16071
Note 1:
Specifications are guaranteed for the stated global conditions, unless otherwise noted. 100% production tested at T
A
=
+25NC and T
A
= +85NC. Specifications at T
A
= -40NC are guaranteed by design.
Note 2:
For 3.3V V
CC
applications, connect V
CC
, DBP, and ABP together. For higher supply applications, connect V
CC
only to the
supply rail.
Note 3:
Applies to RESET, fault, autoretry, sequence delays, and watchdog timeout.
Note 4:
Total unadjusted error is a combination of gain, offset, and quantization error.
_______________________________________________________________________________________
5
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