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MAX6895AALTMAXIMN/a4500avaiUltra-Small, Adjustable Sequencing/Supervisory Circuits
MAX6895AALT+T |MAX6895AALTTMAXIN/a5000avaiUltra-Small, Adjustable Sequencing/Supervisory Circuits
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MAX6895AALT-MAX6895AALT+T-MAX6895AAZT+-MAX6896AALT+T-MAX6897AAZT+T-MAX6898AALT+T-MAX6899AAZT+T
Ultra-Small, Adjustable Sequencing/Supervisory Circuits
General Description
The MAX6895–MAX6899 is a family of small, low-pow-
er, voltage-monitoring circuits with sequencing
capability. These miniature devices offer tremendous
flexibility with an adjustable threshold capable of monitor-
ing down to 0.5V and an external capacitor-adjustable time
delay. These devices are ideal for use in power-supply
sequencing, reset sequencing, and power-switching
applications. Multiple devices can be cascaded for complex
sequencing applications.
A high-impedance input with a 0.5V threshold allows an
external resistive divider to set the monitored threshold.
The output asserts (OUT = high or OUT = low) when
the input voltage rises above the 0.5V threshold and
the enable input is asserted (ENABLE = high or
ENABLE = low). When the voltage at the input falls
below 0.5V or when the enable input is deassert-
ed (ENABLE = low or ENABLE = high), the output
deasserts (OUT = low or OUT = high). All devices
provide a capacitor-programmable delay time from when
the input rises above 0.5V to when the output is assert-
ed. The MAX689_A versions provide the same capaci-
tor-adjustable delay from when enable is asserted to
when the output asserts. The MAX689_P devices have
a 1µs propagation delay from when enable is asserted
to when the output asserts.
The MAX6895A/P offers an active-high enable input
and an active-high push-pull output. The MAX6896A/P
offers an active-low enable input and an active-low
push-pull output. The MAX6897A/P offers an active-
high enable input and an active-high open-drain
out-put. Finally, the MAX6898A/P offers an active-low
enable input and an active-low open-drain output. The
MAX6899A/P offers an active-low enable with an active-
high push-pull output.
All devices operate from a 1.5V to 5.5V supply volt-
age and are fully specified over the -40°C to +125°C
operating temperature range. These devices are
available in ultra-small 6-pin µDFN (1.0mm x 1.5mm) and
thin SOT23 (1.60mm x 2.90mm) packages.
Applications
Features
●1.8% Accurate Adjustable Threshold Over emperature● Operate from VCC of 1.5V to 5.5V● Capacitor-Adjustable Delay● Active-High/-Low Enable Input Options● Active-High/-Low Output Options● Open-Drain (28V Tolerant)/Push-Pull Output
Options● Low Supply Current (10µA, typ)● Fully Specified from -40°C to +125°C● Ultra-Small 6-Pin µDFN Package or Thin SOT23
Package●Automotive●Medical Equipment●Intelligent Instruments●Portable Equipment●Computers/Servers●Critical µP Monitoring●Set-Top Boxes●Telecom
Note: All devices are specified over the -40°C to +125°C

operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part; T = Tape and reel.
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
Ordering Information continued at end of data sheet.

Pin Configurations continued at end of data sheet.
PARTPIN-PACKAGETOP MARK
MAX6895AALT+
6 µDFN+AW
MAX6895AAZT+6 Thin SOT23+AADK
MAX6895PALT+T6 µDFN+AX
MAX6895PAZT+6 Thin SOT23+AADL
MAX6896AALT+
6 µDFN+AY
MAX6896AAZT+6 Thin SOT23+AADO
MAX6896AAZT/V+T6 Thin SOT23+AATA
MAX6896PALT+T6 µDFN+AZ
MAX6896PAZT+6 Thin SOT23+AADP
MAX6896PAZT/V+T6 Thin SOT23—2354
OUT
( ) FOR MAX6899 ONLY.
VCCCDELAY
ENABLE
(ENABLE)GND
MAX6895
MAX6897MAX6899
µDFN

TOP VIEW
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Pin Conigurations
Ordering Information
µDFN
Junction-to-Ambient Thermal Resistance (θJA)......... 477°C/WJunction-to-Case Thermal Resistance (θJC)................122C/W
Thin SOT23
Junction-to-Ambient Thermal Resistance (θJA)..........110°C/W
Junction-to-Case Thermal Resistance (θJC).................50°C/W
VCC, ENABLE, ENABLE, IN ...................................-0.3V to +6V
OUT, OUT (push-pull) ...............................-0.3V to (VCC + 0.3V)
OUT, OUT (open-drain) .........................................-0.3V to +30V
CDELAY ...................................................-0.3V to (VCC + 0.3V)
Output Current (all pins) ...................................................±20mA
Continuous Power Dissipation (TA = +70°C)6-Pin µDFN (derate 2.1mW/°C above +70°C) .........167.7mW 6-Pin Thin SOT23 (derate 9.1mW/°C above +70°C) ....727.3mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range ............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
(VCC = 1.5V to 5.5V, TA = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V and TA = +25°C, unless
otherwise noted.) (Note 2)
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four layer
board. For detailed information on package thermal considerations refer to www.maximintegrated.com/thermal-tutorial.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SUPPLY

Operating Voltage RangeVCC1.55.5V
Undervoltage Lockout (Note 3)UVLOVCC falling1.201.35V
VCC Supply CurrentICCVCC = 3.3V, no load1020µA
Threshold VoltageVTHVIN rising, 1.5V < VCC < 5.5V0.4910.50.509V
HysteresisVHYSTVIN falling5mV
Input Current (Note 4)IINVIN = 0V or VCC-15+15nA
CDELAY

Delay Charge CurrentICD200250300nA
Delay ThresholdVTCDCDELAY rising0.951.001.05V
CDELAY Pulldown ResistanceRCDELAY130500Ω
ENABLE/ENABLE

Input Low VoltageVIL0.4V
Input High VoltageVIH1.4V
Input Leakage CurrentILEAKENABLE, ENABLE = VCC or GND-100+100nA
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Electrical Characteristics
Package Thermal Characteristics (Note 1)

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.
Absolute Maximum Ratings
Note 2: All devices are production tested at TA = +25°C. Limits over temperature are guaranteed by design.
Note 3:
When VCC falls below the UVLO threshold, the outputs will deassert (OUT goes low, OUT goes high). When VCC falls
below 1.2V, the out cannot be determined.
Note 4:
Guaranteed by design.
Note 5:
During the initial power-up, VCC must exceed 1.5V for at least 2ms before the output is guaranteed to be in the correct
state.
(VCC = 1.5V to 5.5V, TA = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V and TA = +25°C, unless
otherwise noted.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
OUT/OUT

Output Low Voltage (Open-Drain
or Push-Pull)VOL
VCC ≥ 1.2V, ISINK = 90µA,
MAX6895/MAX6897/MAX6899 only0.3VCC ≥ 2.25V, ISINK = 0.5mA0.3
VCC ≥ 4.5V, ISINK = 1mA0.4
Output High Voltage (Push-Pull)VOH
VCC ≥ 2.25V, ISOURCE = 500µA0.8 x
VCC
VCC ≥ 4.5V, ISOURCE = 800µA0.8 x
VCC
Output Open-Drain Leakage
CurrentILKGOutput high impedance, VOUT = 28V1µA
TIMING

IN to OUT/OUT Propagation
Delay
tDELAYVIN rising CCDELAY = 0µF40µs
CCDELAY = 0.047µF190ms
tDLVIN falling16µs
Startup Delay (Note 5)2ms
ENABLE/ENABLE Minimum
Input Pulse WidthtPW1µs
ENABLE/ENABLE Glitch
Rejection100ns
ENABLE/ENABLE to OUT/OUT
DelaytOFFFrom device enabled to device disabled150ns
ENABLE/ENABLE to OUT/OUT
Delay
tPROPPFrom device disabled to device enabled
(P version)150ns
tPROPA
From device disabled
to device enabled
(A version)
CCDELAY = 0µF20µs
CCDELAY = 0.047µF190ms
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Electrical Characteristics (continued)
(VCC = 3.3V and TA = +25°C, unless otherwise noted.)
ENABLE TURN-ON/OFF DELAY
(MAX6895A)

MAX6895 toc09
40µs/div
OUT
2V/div
ENABLE
2V/div
ENABLE TURN-ON/OFF
(MAX6896P)

MAX6895 toc08
100ns/div
VOUT
2V/div
VENABLE
2V/div
MAXIMUM TRANSIENT DURATION
vs. INPUT OVERDRIVE

MAX6895 toc07
MAXIMUM TRANSIENT DURATION (8070605040302010
RESET
OCCURS
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT

MAX6895 toc06
ISOURCE (mA)
(V)161214468102
VCC = 5V
VCC = 3V
VCC = 1.5V
OUTPUT LOW VOLTAGE
vs. SINK CURRENT

MAX6895 toc05
ISINK (mA)
(V)
VCC = 5VVCC = 3V
VCC = 1.5V
OUT DELAY
vs. CCDELAY

MAX6895 toc04
CCDELAY (nF)
tDELAY
(ms)
IN THRESHOLD
vs. TEMPERATURE
MAX6895 toc03
TEMPERATURE (C)
(V)
SUPPLY CURRENT
vs. TEMPERATURE
MAX6895 toc02
TEMPERATURE (°C)
ICC
VCC = 5V
VCC = 3V
VCC = 1.5V
SUPPLY CURRENT
vs. SUPPLY VOLTAGE

MAX6895 toc01
VCC (V)
ICC
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Typical Operating Characteristics
PIN
NAMEFUNCTIONMAX6895/
MAX6897MAX6896/
MAX6898MAX6899
µDFNTHIN
SOT23µDFNTHIN
SOT23µDFNTHIN
SOT23
1————ENABLE
Active-High Logic-Enable Input. Drive ENABLE low to
immediately deassert the output to its false state (OUT =
low or OUT = high) independent of VIN. With VIN above
VTH, drive ENABLE high to assert the output to its true
state (OUT = high or OUT = low) after the adjustable
delay period (MAX689_A) or a 150ns propagation delay
(MAX689_P). —1111ENABLE
Active-Low Logic-Enable Input. Drive ENABLE high to
immediately deassert the output to its false state (OUT =
low or OUT = high) independent of VIN. With VIN above
VTH, drive ENABLE low to assert the output to its true
state (OUT = high or OUT = low) after the adjustable
delay period (MAX689_A) or a 150ns propagation delay
(MAX689_P).22222GNDGround33333IN
High-Impedance Monitor Input. Connect IN to an
external resistive divider to set the desired monitored
threshold. The output changes state when VIN rises
above 0.5V and when VIN falls below 0.495V.4——44OUT
Active-High Sequencer/Monitor Output, Push-Pull
(MAX6895/MAX6899) or Open-Drain (MAX6897). OUT
is asserted to its true state (OUT = high) when VIN
is above VTH and the enable input is in its true state
(ENABLE = high or ENABLE = low) for the capacitor-
adjusted delay period. OUT is deasserted to its false
state (OUT = low) immediately after VIN drops below
VTH - 5mV or the enable input is in its false state
(ENABLE = low or ENABLE = high). The open-drain
version requires an external pullup resistor.—44——OUT
Active-Low Sequencer/Monitor Output, Push-Pull
(MAX6896) or Open-Drain (MAX6898). OUT is asserted
to its true state (OUT = low) when VIN is above VTH
and the enable input is in its true state (ENABLE = high
or ENABLE = low) after the CDELAY adjusted timeout
period. OUT is deasserted to its false state (OUT =
high) immediately after VIN drops below VTH - 5mV or
the enable input is in its false state (ENABLE = low or
ENABLE = high). The open-drain version requires an
external pullup resistor.65656CDELAY
Capacitor-Adjustable Delay. Connect an external
capacitor (CCDELAY) from CDELAY to GND to set the
IN to OUT (and ENABLE to OUT or ENABLE to OUT
for A version devices) delay period. tDELAY = (CCDELAY
x 4.0 x 106) + 40µs. There is a fixed short delay (40µs,
typ) for the output deasserting when VIN falls below
VTH.56565VCC
Supply Voltage Input. Connect a 1.5V to 5.5V supply
to VCC to power the device. For noisy systems, bypass
with a 0.1µF ceramic capacitor to GND.
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Pin Description
Detailed Description
The MAX6895–MAX6899 is a family of ultra-small, low-
power, sequencing/supervisory circuits. These devices
provide adjustable voltage monitoring for inputs down to
0.5V. They are ideal for use in power-supply sequenc-
ing, reset sequencing, and power-switching applica-
tions. Multiple devices can be cascaded for complex
sequencing applications.
Voltage monitoring is performed through a high-imped-
ance input (IN) with an internally fixed 0.5V threshold.
When the voltage at IN falls below 0.5V or when the
enable input is deasserted (ENABLE = low or ENABLE =
high), the output deasserts (OUT goes low or OUT goes
high). When VIN rises above 0.5V and the enable input is
asserted (ENABLE = high or ENABLE = low), the output
asserts (OUT goes high or OUT goes low) after a capaci-
tor-programmable time delay.
With VIN above 0.5V, the enable input can be used to
turn the output on or off. After the enable input is assert-
ed, the output turns on with a capacitor-programmable
delay period (A version) or with a 150ns propagation
delay (P version). Tables 1, 2, and 3 detail the out-
put state depending on the various input and enable
conditions.
Supply Input (VCC)

The device operates with a VCC supply voltage from
1.5V to 5.5V. To maintain a 1.8% accurate threshold,
VCC must be above 1.5V. When VCC falls below the
UVLO threshold, the output deasserts. When VCC falls
below 1.2V the output state cannot be determined. For
noisy systems, connect a 0.1µF ceramic capacitor from
VCC to GND as close to the device as possible. For the
push-pull active-high output option, a 100kΩ external
pulldown resistor to ground ensures the correct logic
state for VCC down to 0.
Table 3. MAX6899 Output
Table 2. MAX6896/MAX6898 Output
Table 1. MAX6895/MAX6897 Output

Figure 1. MAX6895/MAX6899 Functional DiagramENABLEOUT
VIN < VTHLowLow
VIN < VTHHighLow
VIN > VTHLowHigh
VIN > VTHHighLowENABLEOUT
VIN < VTHLow
OUT = VCC (MAX6896)
OUT = high impedance
(MAX6898)
VIN < VTHHigh
OUT = VCC (MAX6896)
OUT = high impedance
(MAX6898)
VIN > VTHLowLow
VIN > VTHHigh
OUT = VCC (MAX6896)
OUT = high impedance
(MAX6898)ENABLEOUT
VIN < VTHLowLow
VIN < VTHHighLow
VIN > VTHLowLow
VIN > VTHHigh
OUT = VCC
(MAX6895)
OUT = high
Impedance
(MAX6897)MAX6895
MAX6899

LOGIC
1.0V
250nA
0.5V
OUT
CDELAYGND
ENABLE (MAX6895)
ENABLE (MAX6899)VCC
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Monitor Input (IN)
Connect the center point of a resistive divider to IN to
monitor external voltages (see R1 and R2 of the Typical
Operating Circuit). IN has a rising threshold of VTH =
0.5V and a falling threshold of 0.495V (5mV hysteresis).
When VIN rises above VTH and ENABLE is high (or
ENABLE is low) OUT goes high (OUT goes low) after
the programmed tDELAY period. When VIN falls below
0.495V, OUT goes low (OUT goes high) after a 16µs
delay. IN has a maximum input current of 15nA so
large-value resistors are permitted without adding sig-
nificant error to the resistive divider.
Adjustable Delay (CDELAY)

When VIN rises above VTH with ENABLE high (ENABLE
low), the internal 250nA current source begins charging
an external capacitor connected from CDELAY to GND.
When the voltage at CDELAY reaches 1V, the output
asserts (OUT goes high or OUT goes low). When the
output asserts, CCDELAY is immediately discharged.
Adjust the delay (tDELAY) from when VIN rises above
VTH (with ENABLE high or ENABLE low) to OUT going
high (OUT going low) according to the equation:
tDELAY = CCDELAY x 4.0 x 106 + 40µs
where CCDELAY is the external capacitor from CDELAY
to GND.
For adjustable delay devices (A version), when VIN >
0.5V and ENABLE goes from low to high (ENABLE
goes from high to low) the output asserts after a tDELAY
period. For nonadjustable delay devices (P version)
there is a 1µs propagation delay from when the enable
input is asserted to when the output asserts. Figures 2
through 5 show the timing diagrams for the adjustable and
fixed delay versions, respectively.
Figure 2. MAX6895A/MAX6897A Timing Diagram
VCC
VUVLO
VTHVTH
tPROPA
tDLtOFF
tDELAY
t < tPROPA
tPROPA
ENABLE
OUT
t > tPW
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
Figure 4. MAX6895P/MAX6897P Timing Diagram
Figure 3. MAX6896A/MAX6898A Timing Diagram
VCC
VUVLO
tPROPPtDLtOFF
tDELAY
t > tPW
tPROPP
ENABLE
OUT
VCC
VUVLO
tPROPA
tDLtOFF
tDELAY
t < tPROPA
tPROPA
ENABLE
OUT
t > tPW
MAX6895–MAX6899Ultra-Small, Adjustable Sequencing/
Supervisory Circuits
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