MAX16048ACB+ Maxim Integrated Products, MAX16048ACB+ Datasheet - Page 19

• Manufacturer Part Number: MAX16048ACB+
• Description: IC EE-PROG SYS MGR 8CH 64-TQFP
• Manufacturer: Maxim Integrated Products
• Type: System Managerr

Specifications of MAX16048ACB+

• Number Of Voltages Monitored: 8
• Output: Open Drain, Push-Pull
• Reset: Active Low
• Reset Timeout: Adjustable/Selectable
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

To initiate sequencing/tracking and enable monitoring,
the voltage at EN must be above 0.525V and the
Software Enable bit in r4Dh[0] must be set to ‘0.’ To
power down and disable monitoring, either pull EN
below 0.5V or set the Software Enable bit to ‘1.’ See
Table 1 for the software enable bit configurations.
Connect EN to ABP if not used. If EN is driven by exter-
nal logic instead of from the center tap of a V
nected resistive divider, ensure that an active-high
The MAX16046A/MAX16048A feature an internal 10-bit
ADC that monitors the MON_ voltage inputs. An internal
multiplexer cycles through each of the twelve inputs,
taking 150µs (typ) for a complete monitoring cycle.
Each acquisition takes approximately 12.45µs. At each
multiplexer stop, the 10-bit ADC converts the analog
input to a digital result and stores the result in a regis-
ter. ADC conversion results are stored in registers r00h
to r17h in the extended page. Use the I
al interface to read ADC conversion results. See the
I
Serial Interface section for more information on access-
ing the extended page.
The MAX16046A provides twelve inputs, MON1–
MON12, for voltage monitoring. The MAX16048A pro-
vides eight inputs, MON1–MON8, for voltage monitor-
ing. Each input voltage range is programmable in
registers r0Fh to r11h (see Table 2). When MON_ con-
Table 1. EEPROM Software Enable Configurations
2
System Managers with Nonvolatile Fault Registers
C/SMBus-Compatible Serial Interface or the JTAG
EEPROM ADDRESS
REGISTER/
4Dh
12-Channel/8-Channel EEPROM-Programmable
______________________________________________________________________________________
BIT RANGE
[7:4]
Voltage Monitoring
0
1
2
3
2
C or JTAG seri-
Software Enable bit
0 = Enabled. EN must also be high to begin sequencing.
1 = Disabled (factory default)
Margin bit
1 = Margin functionality is enabled
0 = Margin disabled
Early Warning Selection bit
0 = Early warning thresholds are undervoltage thresholds
1 = Early warning thresholds are overvoltage thresholds
Watchdog Mode Selection bit
0 = Watchdog timer is in dependent mode
1 = Watchdog timer is in independent mode
Not used
Enable
CC
-con-
pulse occurs on EN within 1.5ms of V
2.85V. If the external driving logic is in the high-imped-
ance state during power-up, this pulse can be created
by connecting an external pullup resistor to EN
If a fault condition occurs during the power-up cycle,
the EN_OUT_ outputs are powered down immediately,
independent of the state of EN. If operating in latch-on
fault mode, toggle EN or toggle the Software Enable bit
to clear the latch condition and restart the device once
the fault condition has been removed.
figuration registers are set to ‘11,’ MON_ voltages are
not monitored or converted, and the multiplexer does
not stop at these inputs, decreasing the total cycle
time. These inputs cannot be configured to trigger fault
conditions.
The three programmable thresholds for each monitored
voltage include an overvoltage, an undervoltage, and
an early warning threshold that can be set in r4Dh[2] to
be either an undervoltage or overvoltage threshold. See
the Faults section for more information on setting over-
voltage and undervoltage thresholds. All voltage
thresholds are 8 bits wide. The 8 MSBs of the 10-bit
ADC conversion result are compared to these overvolt-
age and undervoltage thresholds.
For any undervoltage or overvoltage condition to be
monitored and any faults detected, the MON_ input
must be assigned to a particular sequence order. See
the Sequencing section for more details on assigning
MON_ inputs.
DESCRIPTION
CC
exceeding
19