MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
General Description
The MAX16072/MAX16073/MAX16074 ultra-small, ultralow-power, microprocessor (μP) supervisory circuits feature
a precision band-gap reference, comparator, and
internally trimmed resistors that set the threshold voltage.
Designed to monitor the system supply voltage and assert
an output during power-up, power-down, and brownout
conditions, these devices provide excellent circuit reliability
and low cost by eliminating external components and
adjustments when monitoring nominal system voltage
from 1.8V to 3.6V.
The MAX16072 has a push-pull, active-low reset output,
the MAX16073 has a push-pull, active-high reset output,
and the MAX16074 has an open-drain active-low reset
output. The devices are designed to ignore fast transients
on VCC. The devices also include a manual reset input
(MR).
The MAX16072/MAX16073/MAX16074 are available in a
1mm x 1mm, space-saving, 4-bump, chip-scale package
(UCSP™).
Applications
●●
●●
●●
●●
●●
Portable/Battery-Powered Equipment
Cell Phones
PDAs
MP3 Players
Digital Cameras
Features
●● Ultra-Low, 0.7μA Supply Current
●● Ultra-Small (1mm x 1mm), 4-Bump UCSP
●● 20μs, 8ms, 34ms, and 140ms Reset Timeout
Options Available
●● Factory-Trimmed Reset Thresholds Available from
1.58V to 3.08V in Approximately 100mV Increments
●● ±2.5% Threshold Accuracy Over Temperature
●● Manual Reset Input
●● Guaranteed Reset Valid to VCC = 1.0V
●● Immune to Short VCC Transient
Ordering Information
PINPACKAGE
PART
RESET OUTPUT TYPE
MAX16072RS_ _D_+
Push-Pull, Active-Low
4 UCSP
MAX16073RS_ _D_+
Push-Pull, Active-High
4 UCSP
MAX16074RS_ _D_+
Open-Drain, Active-Low
4 UCSP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Note: All devices are specified over the -40°C to +85°C
operating temperature range.
Insert the desired suffix numbers (from Table 1) into the blanks
“RS_ _D” to indicate the reset trip threshold. Insert the desired
suffix number (from Table 2) into the blank ”D_+” to indicate the
reset timeout. Minimum order quantity may apply.
Typical Application Circuit
VCC
VCC
MR
VCC
MAX16072
MAX16073
MAX16074 (RESET)/
RESET
GND
µP
RESET
INPUT
GND
( ) FOR THE MAX16073 ONLY
UCSP is a trademark of Maxim Integrated Products, Inc.
19-5112; Rev 2; 3/17
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Absolute Maximum Ratings
Operating Temperature Range............................ -40°C to +85°C
Storage Temperature Range............................. -65°C to +150°C
Junction Temperature......................................................+150°C
Soldering Temperature (reflow)........................................+260°C
(Voltages referenced to GND.)
VCC, MR...................................................................-0.3V to +6V
RESET, RESET Push-Pull........................ -0.3V to (VCC + 0.3V)
RESET Open-Drain..................................................-0.3V to +6V
Output Current (all pins)....................................................±20mA
Continuous Power Dissipation (TA = +70°C)
4-Bump UCSP (derate 3mW/°C above +70°C)............239mW
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
(VCC = 1.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = 3.6V.) (Note 1)
PARAMETER
SYMBOL
Operating Voltage Range
VCC
Supply Current
ICC
Detector Threshold
Detector Threshold Hysteresis
Detector Threshold Tempco
MR INPUT
MR Input High Voltage
VTH
VHYST
∆VTH/°C
CONDITIONS
MIN
TYP
1.0
5.5
TA = -40°C to +85°C
1.2
5.5
VCC = 1.8V for VTH ≤ 1.66V
0.7
1.2
VCC = 3.6V, no load
1.0
1.5
VTH
VTH +
1.5%
VTH
VTH +
2.5%
See Table 1
VCC falling, TA = +25°C
VTH 1.5%
VCC falling,
TA = -40°C to +85°C
VTH 2.5%
mV
ppm/°C
0.7 x
VCC
0.7 x
VCC
RESET/RESET OUTPUT (Note 3)
Open-Drain RESET Output
Leakage Current
V
40
25
VOH
µA
6.3
MR Pullup Resistance
Output-Voltage High
V
VCC rising, VTH ≤ 1.66V (Note 2)
VIH
VOL
UNITS
(Note 2)
VIL
Output-Voltage Low
MAX
TA = 0°C to +85°C
50
75
VCC ≥ 1.2V, ISINK = 100µA
0.4
VCC ≥ 1.65V, ISINK = 1mA
0.3
VCC ≥ 1.65V, ISOURCE = 500µA
0.8 x
VCC
VCC ≥ 1.2V, ISOURCE = 50µA
0.8 x
VCC
V
kΩ
V
V
RESET not asserted (Note 2)
0.1
µA
TIMING
MR Minimum Pulse Width
tMPW
(Note 2)
MR Glitch Rejection
tEGR
(Note 2)
MR to RESET/RESET
Propagation Delay
tOFF
MR falling
1
2
µs
tON
MR rising
200
400
ns
tDL
VCC = (VTH + 100mV) to (VTH -100mV)
20
90
µs
VCC to Reset Delay
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0.8
µs
100
ns
Maxim Integrated │ 2
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Electrical Characteristics (continued)
(VCC = 1.5V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = 3.6V.) (Note 1)
PARAMETER
SYMBOL
Reset Active Timeout Period
CONDITIONS
VCC rising, VCC =
(VTH - 100mV) to
(VTH + 100mV)
tRP
MIN
TYP
MAX
UNITS
MAX1607_RSD0+
20
80
120
µs
MAX1607_RSD1+
8
13
17
ms
MAX1607_RSD2+
34
52
69
ms
MAX1607_RSD3+
140
210
280
ms
Note 1: Production testing done at TA = +25°C only. Overtemperature limits are guaranteed by design and are not production
tested.
Note 2: Guaranteed by design.
Note 3: Reset is guaranteed down to VCC = 1.0V.
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
2
1
0
VCC = 5V
2.0
VCC = 3V
1.5
1.0
0.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
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0
VCC = 1.8V
-40
-15
10
35
TEMPERATURE (°C)
60
85
MAX16072 toc03
2.5
NORMALIZED RESET THRESHOLD
vs. TEMPERATURE
0.3
NORMALIZED RESET THRESHOLD (%)
3
MAX16072 toc02
4
SUPPLY CURRENT
vs. TEMPERATURE
3.0
SUPPLY CURRENT (µA)
MAX16072 toc01
SUPPLY CURRENT (µA)
5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.2
0.1
VCC FALLING
0
-0.1
VCC RISING
-0.2
-0.3
-40
-15
10
35
60
85
TEMPERATURE (°C)
Maxim Integrated │ 3
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
4.0
1.00
VOH (V)
1.25
VCC = 5V
0.75
VCC = 3V
0.50
VCC = 1.8V
0
2
4
6
8
0
10 12 14 16 18 20
40
35
30
VRST = 1.63V
25
20
15
10
VRST = 3.08V
5
0
2
4
6
8
0
10 12 14 16 18 20
1
10
100
1000
RESET THRESHOLD OVERDRIVE (mV)
VCC TO RESET PROPAGATION DELAY
vs. TEMPERATURE
VCC TO RESET PROPAGATION DELAY
vs. TEMPERATURE
MR TO RESET DELAY (tON)
vs. VCC
40
VOD = 10mV
VOD = 20mV
-15
10
VOD = 10mV
80
VOD = 100mV
60
VOD = 20mV
40
35
60
85
0
120
90
60
30
VOD = 200mV
VCC RISING
-40
-15
10
35
TEMPERATURE (°C)
TEMPERATURE (°C)
MR TO RESET DELAY (tOFF)
vs. VCC
MR TURN-ON
1.00
150
MAX16072 toc09
100
20
VCC FALLING
-40
VOD = OVERDRIVE VOLTAGE
RESET DELAY (ns)
VOD = 100mV VOD = 200mV
120
MAX16072 toc08
VOD = OVERDRIVE VOLTAGE
PROPAGATION DELAY (µS)
MAX16072 toc07
ISOURCE (mA)
MAX16072 toc10
PROPAGATION DELAY (µs)
VCC = 1.8V
2.0
RESET OCCURS ABOVE LINES
45
ISINK (mA)
1.25
RESET DELAY (µs)
2.5
1.0
60
0
3.0
50
0.5
80
20
VCC = 3V
1.5
0.25
0
VCC = 5V
3.5
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
MAX16072 toc06
1.50
4.5
TRANSIENT DURATION (µs)
1.75
VOL (V)
5.0
MAX16072 toc04
2.00
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX16072 toc05
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
60
MR RISING
0
1.650
85
1.925
2.200
2.475
2.750
VCC (V)
MR TURN-OFF
MAX16072 toc11
MAX16072 toc12
MR
1V/div
MR
1V/div
RESET
1V/div
RESET
1V/div
0.75
0.50
0.25
0
1.650
MR FALLING
1.925
2.200
2.475
2.750
100ns/div
200ns/div
VCC (V)
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Maxim Integrated │ 4
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Bump Configuration
MAX16072
MAX16073
TOP VIEW
(BUMP SIDE DOWN) MAX16074
1
2
A
GND
VCC
B
RESET/
(RESET)
MR
+
UCSP
( ) FOR THE MAX16073 ONLY
Bump Description
BUMP
MAX16072
MAX16073
MAX16074
A1
A1
A1
B1
—
—
B1
—
—
NAME
GND
FUNCTION
Ground
RESET
Active-Low Push-Pull Reset Output. RESET changes from high to
low when VCC drops below the detector threshold (VTH) or MR is
pulled low. RESET remains low for the reset timeout period after VCC
exceeds VTH and MR is high. When MR is low, RESET is low.
RESET
Active-High Push-Pull Reset Output. RESET changes from low to high
when VCC drops below the detector threshold (VTH) or MR is pulled low.
RESET remains high for the reset timeout period after VCC exceeds
VTH and MR is high. When MR is low, RESET is high.
Active-Low Open-Drain Reset Output. RESET changes from highimpedance to active-low when VCC drops below the detector
threshold (VTH) or MR is pulled low. RESET remains low for the
reset timeout period after VCC exceeds the reset threshold and MR is
high. When MR is low, RESET is low.
—
—
B1
RESET
A2
A2
A2
VCC
Supply Voltage and Input for the Reset Threshold Monitor
MR
Active-Low Manual-Reset Input. Drive low to force a reset. Reset
remains active as long as MR is low and for the reset timeout period
(if applicable) after MR is driven high. MR has an internal pullup
resistor connected to VCC, and may be left unconnected if not used.
B2
B2
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B2
Maxim Integrated │ 5
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Functional Diagrams
VCC
VCC
RESET
(RESET)
RESET
TIMEOUT
RESET
RESET
TIMEOUT
MAX16072
MAX16073
MAX16074
MR
MR
GND
GND
( ) MAX16073 ONLY
Detailed Description
The MAX16072/MAX16073/MAX16074 ultra-small,
ultra-low-power, µP supervisory circuits feature a precision band-gap reference, comparator, and internally
trimmed resistors that set specified trip threshold voltages. Designed to monitor the system supply voltage and
an output during power-up, power-down, and brownout
conditions, these devices provide excellent circuit reliability and low cost by eliminating external components and
adjustments when monitoring nominal system voltage
from 1.8V to 3.6V.
The MAX16072 has a push-pull active-low reset output,
the MAX16073 has a push-pull active-high reset output,
and the MAX16074 has an open-drain active-low reset
Supply and Monitored Input (VCC)
The MAX16072/MAX16073/MAX16074 operate with a
VCC supply voltage from 1.2V to 5.5V. VCC has a rising
threshold of VTH + VHYST and a falling threshold of VTH.
When VCC rises above VTH + VHYST and MR is high,
RESET goes high (RESET goes low) after the reset timeout period (tRP). See Figure 1.
When VCC falls below VTH, RESET goes low (RESET
goes high) after a fixed delay (tRD).
VTH + VHYST
VTH
VCC
output. The devices are designed to ignore fast transients
on VCC. The devices also include a manual reset input
(MR). When MR is low, reset is asserted. When MR is
high and VCC is above the detector threshold (VTH), reset
is not asserted.
tMPW
t < tEGR
t < tMPW
MR
RESET
tON
tDL
tRP
tOFF
tON
Figure 1. MAX16072/MAX16073/MAX16074 Timing Diagram
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Maxim Integrated │ 6
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Manual Reset Input (MR)
Many µP-based products require manual-reset capability,
allowing the operator, a test technician, or external logic
circuit to initiate a reset. A logic-low on MR asserts reset.
Reset remains asserted while MR is low, and for the reset
active timeout period (tRP) or delay (tON) after MR returns
high. This input has an internal 50kΩ pullup resistor, so
it can be left unconnected if it is not used. MR can be
driven with TTL or CMOS logic levels, or with open-drain/
collector outputs. For manual operation, connect a normally open momentary switch from MR to GND; external
debouncing circuitry is not required. If MR is driven from
long cables or if the device is used in a noisy environment,
connect a 0.1µF capacitor from MR to ground to provide
additional noise immunity.
Table 1. Factory Trimmed Reset
Thresholds
TA = +25°C
TYP
MIN
MAX
15
1.58
1.54
1.61
16
1.63
1.60
1.66
17
1.67
1.62
1.71
18
1.80
1.76
1.85
19
1.90
1.85
1.95
20
2.00
1.95
2.05
21
2.10
2.05
2.15
22
2.20
2.145
2.25
23
2.32
2.262
2.375
24
2.40
2.34
2.46
25
2.50
2.437
2.562
26
2.63
2.564
2.69
27
2.70
2.633
2.768
28
2.80
2.63
2.87
29
2.93
2.857
3.0
30
3.00
2.925
3.075
31
3.08
3.003
3.15
Applications Information
Interfacing to µP with
Bidirectional Reset Pins
Since RESET on the MAX16074 is open-drain, this
device interfaces easily with µPs that have bidirectional
reset pins. Connecting the µP supervisor’s RESET output
directly to the µP’s RESET pin with a single pullup resistor
allows either device to assert reset (Figure 2).
Negative-Going VCC Transients
The MAX16072/MAX16073/MAX16074 family of devices
is relatively immune to short-duration, negative-going VCC
transients (glitches). The Typical Operating Characteristics
show the Maximum Transient Duration vs. Reset Threshold
Overdrive graph, for which reset pulses are not generated.
The graph shows the maximum pulse width that a negative-going VCC transient may typically have when issuing
a reset signal. As the amplitude of the transient increases,
the maximum allowable pulse width decreases.
VCC
VCC
VCC
MAX16074
µP
MOTOROLA
68HCXX
RESET
MR
GND
RESET TRIP THRESHOLD (V)
THRESHOLD
SUFFIX
TA = -40°C to +85°C
Table 2. Reset Timeout Periods
RESET TIMEOUT PERIODS
SUFFIX
MIN
TYP
MAX
UNITS
0
20
80
120
µs
1
8
13
17
ms
2
34
52
69
ms
3
140
210
280
ms
RESET
INPUT
GND
Figure 2. Interfacing to μP with Bidirectional Reset Pins
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Maxim Integrated │ 7
MAX16072/MAX16073/
MAX16074
Chip Information
PROCESS: BiCMOS
www.maximintegrated.com
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
4 UCSP
R41C1-1
21-0242
Maxim Integrated │ 8
MAX16072/MAX16073/
MAX16074
nanoPower μP Supervisory Circuits in a
4-Bump (1mm x 1mm) Chip-Scale Package
Revision History
REVISION
NUMBER
REVISION
DATE
0
1/10
Initial release
1
3/15
Changed upper VCC supply range from 2.75V to 5.5V
2
3/17
Updated title to include “nanoPower”
DESCRIPTION
PAGES
CHANGED
—
2, 3, 6
1–9
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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