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MAX6887QETE+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
The MAX6887/MAX6888 multivoltage supply supervi-
sors provide several voltage-detector inputs, one watch-
dog input, and three outputs. Each voltage-detector
input offers a factory-set undervoltage and overvoltage
threshold. Manual reset and margin disable inputs offer
additional flexibility.
The MAX6887 offers six voltage-detector inputs, while
the MAX6888 offers four inputs. Output RESET asserts
when any input voltage drops below its respective
undervoltage threshold or manual reset MR is asserted.
Output OV asserts when any input voltage exceeds its
respective overvoltage threshold. Monitor standard
supply voltages listed in the
Selector Guide
.
The MAX6887/MAX6888 offer a watchdog timer with an
initial and normal timeout periods of 102.4s and 1.6s,
respectively. Watchdog output WDO asserts when the
watchdog timer expires. Connect WDO to manual reset
input MR to generate resets when the watchdog timer
expires. RESET, OV, and WDO are active-low, open-
drain outputs.
The MAX6887/MAX6888 are available in a 5mm x 5mm
x 0.8mm, 16-pin thin QFN package and operate over
the extended -40°C to +85°C temperature range.
Applications
Multivoltage Systems
Telecom
Networking
Servers/Workstations/Storage Systems
Features
o Hex/Quad Voltage Detectors
o Undervoltage and Overvoltage Thresholds
o 1% Threshold Accuracy
o Margining Disable and Manual Reset Input
o Watchdog Timer
o Open-Drain RESET, OV, and WDO Outputs
o 180ms (min) Reset Timeout Period
o Few External Components
o Small 5mm x 5mm, 16-Pin Thin QFN Packages
MAX6887/MAX6888
Hex/Quad, Power-Supply Supervisory Circuits
________________________________________________________________
Maxim Integrated Products
1
PART TEMP RANGE PIN-PACKAGE
MAX6887_ETE+ -40°C to +85°C 16 Thin QFN-EP*
MAX6888_ETE+ -40°C to +85°C 16 Thin QFN-EP*
Ordering Information
Selector Guide
19-0291; Rev 2; 2/10
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.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
Note: Insert the desired letter from the Selector Guide into the
blank to complete the part number.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
NOMINAL INPUT VOLTAGE (V)*
PART
IN1 IN2 IN3 IN4 IN5 IN6
TOL
(%)
MAX6887AETE 5.0 3.3 2.5 1.8 Adj Adj 5
MAX6887BETE 5.0 3.3 2.5 Adj Adj Adj 5
MAX6887CETE 5.0 3.3 1.8 Adj Adj Adj 5
MAX6887DETE 3.3 2.5 1.8 1.5 Adj Adj 5
MAX6887EETE 3.3 2.5 1.8 Adj Adj Adj 5
MAX6887FETE 3.3 2.5 1.5 Adj Adj Adj 5
MAX6887GETE 3.3 2.5 Adj Adj Adj Adj 5
MAX6887HETE 3.3 1.8 Adj Adj Adj Adj 5
MAX6887QETE Adj Adj Adj Adj Adj Adj 5
NOMINAL INPUT VOLTAGE (V)*
PART
IN1 IN2 IN3 IN4 IN5 IN6
TOL
(%)
MAX6887IETE 5.0 3.3 2.5 1.8 Adj Adj 10
MAX6887JETE 5.0 3.3 2.5 Adj Adj Adj 10
MAX6887KETE 5.0 3.3 1.8 Adj Adj Adj 10
MAX6887LETE 3.3 2.5 1.8 1.5 Adj Adj 10
MAX6887METE 3.3 2.5 1.8 Adj Adj Adj 10
MAX6887NETE 3.3 2.5 1.5 Adj Adj Adj 10
MAX6887OETE 3.3 2.5 Adj Adj Adj Adj 10
MAX6887PETE 3.3 1.8 Adj Adj Adj Adj 10
MAX6887RETE Adj Adj Adj Adj Adj Adj 10
*
See thresholds options tables (Tables 1 and 2) for actual undervoltage and overvoltage thresholds.
Selector Guides continued at end of data sheet.
MAX6887/MAX6888
Hex/Quad, Power-Supply Supervisory Circuits
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN1
–V
IN4
or V
CC
= 2.7V to 5.8V, WDI = GND, MARGIN = MR = BP, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Notes 1, 2)
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.
(All voltages referenced to GND.)
IN1–IN6, V
CC
, RESET, OV, WDO .............................-0.3V to +6V
WDI, MR, MARGIN ...................................................-0.3V to +6V
BP .............................................................................-0.3V to +3V
Input/Output Current (all pins)..........................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin 5mm x 5mm Thin QFN
(derate 20.8mW/°C above +70°C)..............................1667mW
Maximum Junction Temperature .....................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Operating Voltage Range
(Note 3)
Voltage on either one of IN1–IN4 or V
CC
to
guarantee the part is fully operational
2.7 5.8 V
Supply Current I
CC
V
IN1
= 5.8V, IN2–IN6 = GND, no load 0.9 1.2 mA
IN1–IN6, IN_ falling, T
A
= +25°C to +85°C -1 +1
Threshold Accuracy
(See the Selector Guide)
V
TH
IN1–IN6, IN_ falling, T
A
= -40°C to +85°C
-1.5 +1.5
% V
TH
Threshold Hysteresis
V
TH-HYST
0.3
% V
TH
Threshold Tempco
∆V
TH
/°C
10
ppm/°C
IN_ Input Impedance R
IN
For V
IN_
< highest V
IN1–IN4
and
V
IN_
< V
CC
(not ADJ), thresholds are not set
as adjustable
130 200 300
kΩ
IN5, IN6 (MAX6887 only)
IN_ Input Leakage Current I
IN
IN1–IN4 set as adjustable thresholds
-150 +150
nA
Power-Up Delay t
D-PO
V
CC
≥ 2.5V 2.5 ms
IN_ to RESET or OV Delay t
D-R
IN_ falling/rising, 100mV overdrive 20 µs
RESET Timeout Period t
RP
180 200 220
ms
OV Timeout Period t
OP
25 µs
RESET, OV, and WDO Output
Low
V
OL
I
SINK
= 4mA, output asserted 0.4 V
RESET, OV, and WDO Output
Open-Drain Leakage Current
I
LKG
Output high impedance -1 +1 µA
MAX6887/MAX6888
Hex/Quad, Power-Supply Supervisory Circuits
_______________________________________________________________________________________ 3
Note 1: 100% production tested at T
A
= +25°C and T
A
= +85°C. Specifications at T
A
= -40°C are guaranteed by design.
Note 2: Device may be supplied from any one of IN1–IN4 or V
CC
.
Note 3: The internal supply voltage, measured at V
CC
, equals the maximum of IN1–IN4.
Note 4: Versions Q and R require that power be applied through V
CC
.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN1
–V
IN4
or V
CC
= 2.7V to 5.8V, WDI = GND, MARGIN = MR = BP, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are
at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
V
IL
0.6
MR, MARGIN, WDI Input Voltage
V
IH
1.4
V
MR Input Pulse Width t
MR
1µs
MR Glitch Rejection
100
ns
MR to RESET or OV Delay t
D-MR
200
ns
MR to Internal BP Pullup Current I
MR
V
MR
= 1.4V 5 10 15 µA
MARGIN to Internal BP Pullup
Current
I
MARGIN
V
MARGIN
= 1.4V 5 10 15 µA
WDI Pulldown Current I
WDI
V
WDI
= 0.6V 5 10 15 µA
WDI Input Pulse Width 50 ns
t
WDI
Initial
92.16 102.4 112.64
Watchdog Timeout Period
t
WD
Normal
1.44
1.6
1.76
s
Typical Operating Characteristics
(V
IN1
–V
IN4
or V
CC
= 5V, WDI = GND, MARGIN = MR = BP, T
A
= +25°C, unless otherwise noted.)
IN1–IN4 SUPPLY CURRENT
vs. IN1–IN4 SUPPLY VOLTAGE
MAX6887 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.64.63.6
0.75
0.80
0.85
0.90
0.95
1.00
0.70
2.6
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40°C
V
CC
SUPPLY CURRENT
vs. V
CC
SUPPLY VOLTAGE
MAX6887 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.64.63.6
0.75
0.80
0.85
0.90
0.95
1.00
0.70
2.6
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40°C
TIMEOUT PERIOD (ms)
185
190
195
200
210
205
215
220
180
RESET TIMEOUT PERIOD
vs. TEMPERATURE
MAX6887 toc03
TEMPERATURE (°C)
603510-15-40 85
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX6887QETE+T

Mfr. #:
Buy MAX6887QETE+T
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Hex Power-Supply Supervisor
Lifecycle:
New from this manufacturer.
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