General Description
The MAX6895–MAX6899 is a family of small, low-power,
voltage-monitoring circuits with sequencing capability.
These miniature devices offer tremendous flexibility with
an adjustable threshold capable of monitoring 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 deasserted (ENABLE = low or
ENABLE = high), the output deasserts (OUT = low or
OUT = high). All devices provide a capacitor-program-
mable delay time from when the input rises above 0.5V
to when the output is asserted. The MAX689_A versions
provide the same capacitor-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 output.
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 voltage
and are fully specified over the -40°C to +125°C operat-
ing 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
Automotive Computers/Servers
Medical Equipment Critical µP Monitoring
Intelligent Instruments Set-Top Boxes
Portable Equipment Telecom
Features
♦1.8% Accurate Adjustable Threshold Over
Temperature
♦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
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
________________________________________________________________
Maxim Integrated Products
1
123
654
OUT
( ) FOR MAX6899 ONLY.
VCC CDELAY
ENABLE
(ENABLE)
INGND
MAX6895
MAX6897
MAX6899
µDFN
TOP VIEW
Pin Configurations
Ordering Information
19-3673; Rev 8; 7/11
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.
Typical Operating Circuit and Selector Guide appear at end
of data sheet. Pin Configurations continued at end of data sheet.
Ordering Information continued at end of data sheet.
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
PART PIN-PACKAGE TOP MARK
MAX6895AALT+ 6 µDFN +AW
MAX6895AAZT+ 6 Thin SOT23 +AADK
MAX6895PALT+T 6 µDFN +AX
MAX6895PAZT+ 6 Thin SOT23 +AADL
MAX6896AALT+ 6 µDFN +AY
MAX6896AAZT+ 6 Thin SOT23 +AADO
MAX6896AAZT/V+T 6 Thin SOT23 +AATA
MAX6896PALT+T 6 µDFN +AZ
MAX6896PAZT+ 6 Thin SOT23 +AADP
MAX6896PAZT/V+T 6 Thin SOT23
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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)
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.
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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SUPPLY
Operating Voltage Range VCC 1.5 5.5 V
Undervoltage Lockout (Note 3) UVLO VCC falling 1.20 1.35 V
VCC Supply Current ICC VCC = 3.3V, no load 10 20 µA
IN
Threshold Voltage VTH VIN rising, 1.5V < VCC < 5.5V 0.491 0.5 0.509 V
Hysteresis VHYST VIN falling 5 mV
Input Current (Note 4) IIN VIN = 0V or VCC -15 +15 nA
CDELAY
Delay Charge Current ICD 200 250 300 nA
Delay Threshold VTCD CDELAY rising 0.95 1.00 1.05 V
CDELAY Pulldown Resistance RCDELAY 130 500 Ω
ENABLE/ENABLE
Input Low Voltage VIL 0.4 V
Input High Voltage VIH 1.4 V
Input Leakage Current ILEAK ENABLE, ENABLE = VCC or GND -100 +100 nA
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.maxim-ic.com/thermal-tutorial.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
µDFN
Junction-to-Ambient Thermal Resistance (θJA)...............477°C/W
Junction-to-Case Thermal Resistance (θJC)......................122°C/W
Thin SOT23
Junction-to-Ambient Thermal Resistance (θJA)................110°C/W
Junction-to-Case Thermal Resistance (θJC).......................50°C/W
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
_______________________________________________________________________________________ 3
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 annot 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.
ELECTRICAL CHARACTERISTICS (continued)
(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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUT/OUT
VCC ≥ 1.2V, ISINK = 90µA,
MAX6895/MAX6897/MAX6899 only 0.3
VCC ≥ 2.25V, ISINK = 0.5mA 0.3
Output Low Voltage (Open-Drain
or Push-Pull) VOL
VCC ≥ 4.5V, ISINK = 1mA 0.4
V
VCC ≥ 2.25V, ISOURCE = 500µA 0.8 x
VCC
Output High Voltage (Push-Pull) VOH
VCC ≥ 4.5V, ISOURCE = 800µA 0.8 x
VCC
V
Output Open-Drain Leakage
Current ILKG Output high impedance, VOUT = 28V 1 µA
TIMING
CCDELAY = 0µF 40 µs
tDELAY VIN rising CCDELAY = 0.047µF 190 ms
IN to OUT/OUT Propagation
Delay tDL VIN falling 16 µs
Startup Delay (Note 5) 2ms
ENABLE/ENABLE Minimum Input
Pulse Width tPW 1µs
ENABLE/ENABLE Glitch
Rejection 100 ns
ENABLE/ENABLE to OUT/OUT
Delay tOFF From device enabled to device disabled 150 ns
tPROPP From device disabled to device enabled
(P version) 150 ns
CCDELAY = 0µF 20 µs
ENABLE/ENABLE to OUT/OUT
Delay tPROPA
From device disabled
to device enabled
(A version) CCDELAY = 0.047µF 190 ms
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
4 _______________________________________________________________________________________
Typical Operating Characteristics
(VCC = 3.3V and TA= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6895 toc01
VCC (V)
ICC (µA)
5.04.53.5 4.01.0 1.5 2.0 2.5 3.00.5
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
1
0 5.5
SUPPLY CURRENT
vs. TEMPERATURE
MAX6895 toc02
TEMPERATURE (°C)
ICC (µA)
1109565 80-10 5 20 35 50-25
2
4
6
8
10
12
14
16
18
20
0
-40 125
VCC = 5V
VCC = 3V
VCC = 1.5V
IN THRESHOLD
vs. TEMPERATURE
MAX6895 toc03
TEMPERATURE (°C)
VTH (V)
1109565 80-10 5 20 35 50-25
0.4992
0.4994
0.4996
0.4998
0.5000
0.5002
0.5004
0.5006
0.5008
0.5010
0.4990
-40 125
OUT DELAY
vs. CCDELAY
MAX6895 toc04
CCDELAY (nF)
tDELAY (ms)
900800600 700200 300 400 500100
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
0
0 1000
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
MAX6895 toc05
ISINK (mA)
VOL (V)
5.55.04.54.03.53.02.52.01.51.00.5
0.3
0.6
0.9
1.2
1.5
0
06.0
VCC = 5V
VCC = 3V
VCC = 1.5V
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX6895 toc06
ISOURCE (mA)
VOH (V)
181612 144 6 8 102
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
020
VCC = 5V
VCC = 3V
VCC = 1.5V
MAXIMUM TRANSIENT DURATION
vs. INPUT OVERDRIVE
MAX6895 toc07
VOVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (µs)
908070605040302010
100
200
300
400
500
600
0
0 100
RESET
OCCURS
ENABLE TURN-ON/OFF (MAX6896P)
MAX6895 toc08
100ns/div
VOUT
2V/div
VENABLE
2V/div
ENABLE TURN-ON/OFF DELAY
(MAX6895A)
MAX6895 toc09
40ms/div
VOUT
2V/div
VENABLE
2V/div
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
_______________________________________________________________________________________ 5
Pin Description
PIN
MAX6895/
MAX6897
MAX6896/
MAX6898 MAX6899
µDFN THIN
SOT23 µDFN THIN
SOT23 µDFN THIN
SOT23
NAME FUNCTION
1 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).
—— 1 1 1 1ENABLE
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).
2 2 2 2 2 2 GND Ground
333333 IN
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 4 — — 4 4 OUT
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.
—— 4 4 ——OUT
Acti ve- Low S eq uencer /M oni tor Outp ut, P ush- P ul l ( M AX 6896) or
O p en- D r ai n ( M AX 6898) . OU T i s asser ted to i ts tr ue state ( O UT =
l ow ) w hen V
I N
i s ab ove V
T H
and the enab l e i np ut i s i n i ts tr ue state
( E N ABLE = hi g h or E NABLE = l ow ) after the C D E LAY ad j usted
ti m eout p er i od . O U T i s d easser ted to i ts fal se state ( O UT = hi g h)
i m m ed i atel y after V
I N
d r op s b el ow V
T H
- 5m V or the enab l e i np ut
i s i n i ts fal se state ( E N ABLE = l ow or E NABLE = hi g h) . The op en-
d r ai n ver si on r eq ui r es an exter nal p ul l up r esi stor .
5 6 5 6 5 6 CDELAY
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.
656565V
CC
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–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
6 _______________________________________________________________________________________
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 output
state depending on the various input and enable condi-
tions.
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 100kΩexternal
pulldown resistor to ground ensures the correct logic
state for VCC down to 0.
MAX6895
MAX6899
LOGIC
1.0V
250nA
0.5V
IN
OUT
CDELAY GND
ENABLE (MAX6895)
ENABLE (MAX6899) VCC
IN ENABLE OUT
VIN < VTH Low Low
VIN < VTH High Low
VIN > VTH Low Low
OUT = VCC (MAX6895)
VIN > VTH High OUT = high impedance
(MAX6897)
Figure 1. MAX6895/MAX6899 Functional Diagram
Table 1. MAX6895/MAX6897 Output
IN ENABLE OUT
OUT = VCC (MAX6896)
VIN < VTH Low OUT = high impedance
(MAX6898)
OUT = VCC (MAX6896)
VIN < VTH High OUT = high impedance
(MAX6898)
VIN > VTH Low Low
OUT = VCC (MAX6896)
VIN > VTH High OUT = high impedance
(MAX6898)
Table 2. MAX6896/MAX6898 Output
IN ENABLE OUT
VIN < VTH Low Low
VIN < VTH High Low
VIN > VTH Low High
VIN > VTH High Low
Table 3. MAX6899 Output
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.
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
_______________________________________________________________________________________ 7
Figure 2. MAX6895A/MAX6897A Timing Diagram
VCC
VUVLO
VTH VTH
tPROPA
tDL tOFF
tDELAY
t < tPROPA
tPROPA
IN
ENABLE
OUT
t > tPW
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
8 _______________________________________________________________________________________
Figure 3. MAX6896A/MAX6898A Timing Diagram
VCC
VUVLO
tPROPA
tDL tOFF
tDELAY
t < tPROPA
tPROPA
IN
ENABLE
OUT
t > tPW
Figure 4. MAX6895P/MAX6897P Timing Diagram
VCC
VUVLO
tPROPP tDL tOFF
tDELAY
t > tPW
tPROPP
IN
ENABLE
OUT
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
_______________________________________________________________________________________ 9
Figure 5. MAX6896P/MAX6898P Timing Diagram
VCC
VUVLO
tPROPP tDL tOFF
tDELAY
t > tPW
tPROPP
IN
ENABLE
OUT
Figure 6. MAX6899A Timing Diagram
VCC
VUVLO
VTH VTH
tPROPA
tDL tOFF
tDELAY
t < tPROPA
tPROPA
IN
ENABLE
OUT
t > tPW
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
10 ______________________________________________________________________________________
Enable Input (ENABLE or
ENABLE
)
The MAX6895/MAX6897 offer an active-high enable
input (ENABLE), while the MAX6896/MAX6898/MAX6899
offer an active-low enable input (ENABLE). With VIN above
VTH, drive ENABLE high (ENABLE low) to force OUT high
(OUT low) after the adjustable delay time (A versions). For
P version devices, when VIN > 0.5V and enable is assert-
ed, the output asserts after typically 150ns.
The enable input has logic-high and logic-low voltage
thresholds of 1.4V and 0.4V, respectively. For both ver-
sions, when VIN > 0.5V, drive ENABLE low (ENABLE
high) to force OUT low (OUT high) within 150ns typ.
Output (OUT or
OUT
)
The MAX6895/MAX6899 offer an active-high, push-pull
output (OUT), and the MAX6896 offers an active-low
push-pull output (OUT). The MAX6897 offers an active-
high open-drain output (OUT), and the MAX6898 offers
an active-low open-drain output (OUT).
Push-pull output devices are referenced to VCC. Open-
drain outputs can be pulled up to 28V.
Applications Information
Input Threshold
The MAX6895–MAX6899 monitor the voltage on IN with
an external resistive divider (see R1 and R2 in the
Typical Operating Circuit
). Connect R1 and R2 as close
to IN as possible. R1 and R2 can have very high values
to minimize current consumption due to low IN leakage
currents (±15nA max). Set R2 to some conveniently
high value (1MΩ, for example) and calculate R1 based
on the desired monitored voltage using the following
formula:
where VMONITOR is the desired monitored voltage and
VIN is the detector input threshold (0.5V).
RR V
V
MONITOR
IN
12 1=×
⎡
⎣
⎢⎤
⎦
⎥
−
Figure 7. MAX6899P Timing Diagram
VCC
VUVLO
tPROPP tDL tOFF
tDELAY
t > tPW
tPROPP
IN
ENABLE
OUT
MAX6895–MAX6899
Pullup Resistor Values
(MAX6897/MAX6898)
The exact value of the pullup resistors for the open-
drain outputs is not critical, but some consideration
should be made to ensure the proper logic levels when
the device is sinking current. For example, if VCC =
2.25V and the pullup voltage is 28V, you would try to
keep the sink current less than 0.5mA as shown in the
Electrical Characteristics
table. As a result, the pullup
resistor should be greater than 56kΩ. For a 12V pullup,
the resistor should be larger than 24kΩ. It should be
noted that the ability to sink current is dependent on the
VCC supply voltage.
Typical Application Circuits
Figures 8, 9, 10 show typical applications for the
MAX6895–MAX6899. Figure 8 shows the MAX6895
used with a p-channel MOSFET in an overvoltage pro-
tection circuit. Figure 9 shows the MAX6895 in a low-
voltage sequencing application using an n-channel
MOSFET. Figure 10 shows the MAX6895 used in a mul-
tiple-output sequencing application.
Using an n-Channel Device for Sequencing
In higher power applications, using an n-channel device
reduces the loss across the MOSFETs as it offers a
lower drain-to-source on-resistance. However, an n-
channel MOSFET requires a sufficient VGS voltage to
fully enhance it for a low RDS_ON. The application in
Figure 9 shows the MAX6895 in a switch sequencing
application using an n-channel MOSFET.
Similarly, if a higher voltage is present in the system, the
open-drain version can be used in the same manner.
Figure 8. Overvoltage Protection
MAX6897
ENABLE
GND
VCC
P
3.3V ALWAYS ON
OUT
R1
0 TO 28V
RPULLUP
R2
IN
CDELAY
MAX6895
ENABLE
GND
VCC
5V BUS
OUT
R1
R2
IN
CDELAY
CCDELAY
1.2V INPUT
1.2V OUTPUT
N
MONITORED
3.3V
Figure 9. Low-Voltage Sequencing Using an n-Channel MOSFET
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
______________________________________________________________________________________ 11
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
12 ______________________________________________________________________________________
Figure 10. Multiple-Output Sequencing
CCDELAY CCDELAY
GND GND GND GND
OUT
OUT
OUT
OUT
IN IN IN IN
VCC
VCC
VCC
VCC
ENABLE ENABLE ENABLE ENABLE
EN
EN
EN
EN
DC-DC
3.3V
5V BUS
SYSTEM
ENABLE
2.5V 1.8V 1.2V
DC-DC DC-DC DC-DC
CCDELAY CCDELAY
MAX6895 MAX6895 MAX6895 MAX6895
MAX6895–MAX6899
MAX6895
ENABLE
GND
VCC
OUT
R1
1.5V TO 5.5V
R2
IN
0.1µF
CDELAY
CCDELAY
Typical Operating Circuit
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
______________________________________________________________________________________ 13
Selector Guide
PART ENABLE INPUT OUTPUT INPUT (IN) DELAY ENABLE DELAY
MAX6895AALT+T Active-High Active-High, Push-Pull Capacitor Adjustable Capacitor Adjustable
MAX6895AAZT+T Active-High Active-High, Push-Pull Capacitor Adjustable Capacitor Adjustable
MAX6895PALT+T Active-High Active-High, Push-Pull Capacitor Adjustable 150ns Delay
MAX6895PAZT+T Active-High Active-High, Push-Pull Capacitor Adjustable 150ns Delay
MAX6896AALT+T Active-Low Active-Low, Push-Pull Capacitor Adjustable Capacitor Adjustable
MAX6896AAZT+T Active-Low Active-Low, Push-Pull Capacitor Adjustable Capacitor Adjustable
MAX6896PALT+T Active-Low Active-Low, Push-Pull Capacitor Adjustable 150ns Delay
MAX6896PAZT+T Active-Low Active-Low, Push-Pull Capacitor Adjustable 150ns Delay
MAX6897AALT+T Active-High Active-High, Open-Drain Capacitor Adjustable Capacitor Adjustable
MAX6897AAZT+T Active-High Active-High, Open-Drain Capacitor Adjustable Capacitor Adjustable
MAX6897PALT+T Active-High Active-High, Open-Drain Capacitor Adjustable 150ns Delay
MAX6897PAZT+T Active-High Active-High, Open-Drain Capacitor Adjustable 150ns Delay
MAX6898AALT+T Active-Low Active-Low, Open-Drain Capacitor Adjustable Capacitor Adjustable
MAX6898AAZT+T Active-Low Active-Low, Open-Drain Capacitor Adjustable Capacitor Adjustable
MAX6898PALT+T Active-Low Active-Low, Open-Drain Capacitor Adjustable 150ns Delay
MAX6898PAZT+T Active-Low Active-Low, Open-Drain Capacitor Adjustable 150ns Delay
MAX6899AALT+T Active-Low Active-High, Push-Pull Capacitor Adjustable Capacitor Adjustable
MAX6899AAZT+T Active-Low Active-High, Push-Pull Capacitor Adjustable Capacitor Adjustable
MAX6899PALT+T Active-Low Active-High, Push-Pull Capacitor Adjustable 150ns Delay
MAX6899PAZT+T Active-Low Active-High, Push-Pull Capacitor Adjustable 150ns Delay
Ordering Information (continued)
PART PIN-PACKAGE TOP MARK
MAX6897AALT+ 6 µDFN +BA
MAX6897AAZT+ 6 Thin SOT23 +AADQ
MAX6897PALT+T 6 µDFN +BB
MAX6897PAZT+ 6 Thin SOT23 +AADR
MAX6898AALT+ 6 µDFN +BD
MAX6898AAZT+ 6 Thin SOT23 +AADS
MAX6898PALT+T 6 µDFN +BC
MAX6898PAZT+ 6 Thin SOT23 +AADT
MAX6899AALT+ 6 µDFN +LO
MAX6899AAZT+ 6 Thin SOT23 +AADM
MAX6899PALT+T 6 µDFN +LP
MAX6899PAZT+ 6 Thin SOT23 +AADN
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
14 ______________________________________________________________________________________
Pin Configurations (continued)
123
654
OUTVCC CDELAY
ENABLE INGND
MAX6896
MAX6898
µDFN
TOP VIEW
THIN SOT23
TOP VIEW
MAX6895
MAX6897
IN
1
2GND
ENABLE
+
+
3 OUT
6
5
CDELAY
VCC
4
THIN SOT23
TOP VIEW
MAX6896
MAX6898
MAX6899
IN
1
2GND
ENABLE
3 OUT
(OUT)
( ) FOR MAX6899 ONLY.
6
5
CDELAY
VCC
4
Chip Information
PROCESS: BiCMOS
PACKAGE
TYPE
PACKAGE
CODE OUTLINE NO. LAND
PATTERN NO.
6 µDFN L611+1 21-0147 90-0080
6 Thin SOT23 Z6+1 21-0114 90-0242
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.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.
MAX6895–MAX6899
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim 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 Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________
15
© 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
510/07 — 1, 13, 18
611/09 Corrected Absolute Maximum Ratings and made style corrections to Electrical
Characteristics and TOC8 and TOC9 2–5
77/10 Revised Figures 3, 4, and 6. 7–9
87/11 Added automotive packages for MAX6896A and MAX6896P. Added top mark to
MAX6896AAZT/V+1 in Ordering Information.1
