MAX6305-13 Datasheet by Maxim Integrated

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General Description
The MAX6305–MAX6313 CMOS microprocessor (µP)
supervisory circuits are designed to monitor more than
one power supply. Ideal for monitoring both 5V and
3.3V in personal computer systems, these devices
assert a system reset if any of the monitored supplies
falls outside the programmed threshold. Low supply
current (15µA) and a small package suit them for
portable applications. The MAX6305–MAX6313 are
specifically designed to ignore fast transients on
any monitored supply.
These devices are available in a SOT23-5 package,
have factory-programmed reset thresholds from 2.5V to
5.0V (in 100mV increments), and feature four power-on
reset timeout periods. Ten standard versions are avail-
able. Contact the factory for availability of non standard
versions.
Applications
Portable Computers
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Multivoltage Systems: 3V/5V, 5V/12V, 5V/24V
Embedded Control Systems
Features
oSmall 5-Pin SOT23 Package
oPrecision Factory-Set VCC Reset Thresholds;
Available in 0.1V Increments from 2.5V to 5V
oImmune to Short VCC Transients
oGuaranteed RESET Valid to VCC = 1V
oGuaranteed Over Temperature
o8µA Supply Current
oFactory-Set Reset Timeout Delay from
1ms (min) to 1120ms (min)
oNo External Components
oManual Reset Input
oUnder/Overvoltage Supply Monitoring
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
19-1145; Rev 6; 7/12
1
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.
Ordering Information
The MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/
MAX6313 are available with factory-set V
CC
reset thresholds from
2.5V to 5V, in 0.1V increments. Insert the desired nominal reset
threshold (from Table 1) into the blanks following the letters UK.
All parts also offer factory-programmed reset timeout periods.
Insert the number corresponding to the desired nominal timeout
period index following the “D” in the part number (D1 = 1ms min,
D2 = 20ms min, D3 = 140ms min, and D4 = 1120ms min). There
are 10 standard versions with a required order increment of 2,500
pieces. Sample stock is generally held on the standard versions
only (see Standard Versions table). Required order increment is
10,000 pieces for non-standard versions. Contact factory for
availability of non-standard versions. All devices available in tape-
and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Pin Configurations and Typical Operating Circuit appear at
end of data sheet.
Ordering Information continued at end of data sheet.
Standard Versions Table appears at end of data sheet.
_______________________________________________________________Selector Table
PART
OPEN-DRAIN
RESET
OUTPUT
PUSH/PULL
RESET
OUTPUT
PUSH/PULL
RESET
OUTPUT
FACTORY-
SET RESET
THRESHOLD
ON VCC
ADDITIONAL
UNDERVOLTAGE
RESET INPUTS
NEGATIVE/
OVERVOLTAGE
RESET INPUT
MAX6305 — — — 2
MAX6306 — — 1 —
MAX6307 — — 1
MAX6308 — — 2
MAX6309 1 —
MAX6310 1
MAX6311 — 2
MAX6312   1 —
MAX6313   1
MANUAL-
RESET
INPUT
PARTTEMP RANGE PIN -
PA C K A G E
MAX6305UK00D_-T -0°C to +70°C 5 SOT23
MAX6305EUK00D_-T
-40°C to +85°C 5 SOT23
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
2
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
VCC = +2.5V to +5.5V for the MAX6305/MAX6308/MAX6311, VCC = (VTH + 2.5%) to +5.5V for the MAX6306/MAX6307/MAX6309/
MAX6310/MAX6312/MAX6313; TA = -40°C to +85°C; unless otherwise noted. Typical values are at TA= +25°C.) (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.
VCC ...........................................................................-0.3V to +6V
All Other Pins..............................................-0.3V to (VCC + 0.3V)
Input/Output Current, All Pins .............................................20mA
Rate of Rise, VCC ............................................................100V/µs
Continuous Power Dissipation (TA= +70°C)
SOT23 (derate 7.1mW/°C above +70°C)....................571mW
Operating Temperature Range
MAX63_ _UK _ _D_-T.........................................0°C to +70°C
MAX63_ _EUK _ _D_-T ...................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Soldering Temperature (reflow)
Lead (Pb) - free packages............................................+260°C
Packages containing lead (Pb).....................................+240°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
VCC Range TA = -40°C to +85°C (Note 2) 1.0 5.5 V
Supply Current ICC VCC = 5.5V 8 16 µA
TA = +25°C VTH -
1.5% VTH
VTH +
1.5%
MAX6306/MAX6307/
MAX6309/MAX6310/
MAX6312/MAX6313 TA = 0°C to +70°C VTH -
2.5% VTH
VTH +
2.5%
Reset Threshold
(Note 3) VTH
MAX6306E/MAX6307/
MAX6309E/MAX6310E/
MAX6312E/MAX6313E
TA = -40°C to +85°C VTH -
2.5% VTH
VTH +
2.5%
V
Reset Threshold VTH/°C 40
ppm/°C
Reset Threshold
VTH HYST 2 x VTH
mV
D1 1.0 1.4 2.0
D2 20 28 40
D3
140 200
280
Reset Timeout Period tRP
D4
1120 1570 2240
ms
VCC > 4.25V, ISINK = 3.2mA
0.4
VCC > 2.5V, ISINK = 1.2mA 0.3
VCC > 1.2V, ISINK = 500µA 0.3
VOL
MAX6305–MAX6310
VCC > 1.0V, ISINK = 50µA 0.3
V
VCC > 4.25V,
ISOURCE = 800µA VCC - 1.5
RESET Output Voltage
VOH
MAX6308/MAX6309/
MAX6310 VCC > 2.5V,
ISOURCE = 500µA 0.8 x VCC
V
VCC > 4.25V, ISINK = 3.2mA
0.4
VOL VCC > 2.5V, ISINK = 1.2mA 0.3
VCC > 1.8V,
ISOURCE = 150µA 0.8 x VCC
RESET Output Voltage
VOH
MAX6311/MAX6312/
MAX6313
VCC > 1.0V,
ISOURCE = 10µA 0.8 x VCC
V
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
3
ELECTRICAL CHARACTERISTICS (continued)
VCC = +2.5V to +5.5V for the MAX6305/MAX6308/MAX6311, VCC = (VTH + 2.5%) to +5.5V for the MAX6306/MAX6307/MAX6309/
MAX6310/MAX6312/MAX6313; TA = -40°C to +85°C; unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Note 1: Overtemperature limits are guaranteed by design, not production tested.
Note 2: The MAX6305/MAX6308/MAX6311 switch from undervoltage reset to normal operation between 1.5V < VCC < 2.5V.
Note 3: The MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 monitor VCC through an internal factory-trimmed voltage
divider, which programs the nominal reset threshold. Factory-trimmed reset thresholds are available in approximately
100mV increments from 2.5V to 5V (Table 1).
Note 4: Guaranteed by design.
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
MANUAL-RESET INPUT (MAX6306/MAX6309/MAX6312)
VIL 0.8
VIH
VTH > 4.0V 2.4
VIL
0.3 x VCC
MR Input
VIH
VTH < 4.0V 0.7 x VCC
V
TA = 0°C to +70°C 1
MR Minimum Input
Pulse Width TA = -40°C to +85°C 1.5 µs
MR Glitch Rejection 0.1 µs
MR to Reset Delay
500
nsV
MR Pullup Resistance 32
63.5
100 k
ADJUSTABLE RESET COMPARATOR INPUTS
TA = +25°C
1.21 1.23 1.25
MAX6305–MAX6313, TA = 0°C to +70°C
1.20 1.26
RST IN_/OVRST_IN
Input Threshold VRSTH
MAX6305E–MAX6313E, TA = -40°C to +85°C
1.20 1.26
V
RST IN_/OVRST_IN
Input Current IRST IN_ 0V < VRST IN < VCC - 0.3V (Note 4) -25 +25 nA
RST IN_/OVRST_IN
Hysteresis 2.5 mV
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
4
__________________________________________Typical Operating Characteristics
(VCC = +5V, TA = +25°C, unless otherwise noted.)
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
-60 -40 -20 0 20 40 60 80 100
SUPPLY CURRENT
vs. TEMPERATURE
6305 TOC01
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
VCC = 2.5V
VCC = 3.5V
VCC = 5.5V
VCC = 4.5V
0
10
20
30
40
50
60
70
-60 -40 -20 0 20 40 60 80 100
OVRST IN RISING PROPAGATION
DELAY vs. TEMPERATURE
(OVERVOLTAGE RESET INPUT)
6305 TOC03
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
1mV
µs
10mV
µs
0
20
40
60
80
100
120
-60 -40 -20 0 20 40 60 80 100
RST IN_ FALLING PROPAGATION
DELAY vs. TEMPERATURE
6305 TOC04
TEMPERATURE (°C)
RST IN_ PROPAGATION DELAY (ns)
1mV
µs
10mV
µs
1
0 400 1200800
MAXIMUM TRANSIENT DURATION vs.
VCC RESET THRESHOLD OVERDRIVE
10
6305 TOC7
OVERDRIVE, VTH - VCC (mV)
TRANSIENT DURATION (µs)
100
1000
10,000
VTH = 5.0V
RESET OCCURS ABOVE LINES
VTH = 2.5V
0.90
0.92
0.94
0.96
0.98
1.00
1.02
1.04
1.06
1.08
1.10
-60 -40 -20 0 20 40 60 80 100
RESET TIMEOUT
vs. TEMPERATURE
6305 TOC05
TEMPERATURE (°C)
NORMALIZED RESET TIMEOUT
0.990
0.992
0.994
0.996
0.998
1.000
1.002
1.004
1.006
1.008
1.010
-60 -40 -20 0 20 40 60 80 100
RESET THRESHOLD
vs. TEMPERATURE
6305 TOC06
TEMPERATURE (°C)
NORMALIZED RESET THRESHOLD (V/V)
1
0 400 1200800
MAXIMUM TRANSIENT DURATION vs.
OVRST IN THRESHOLD OVERDRIVE
10
6305 TOC8
OVERDRIVE, VOVRST IN - VREF (mV)
TRANSIENT DURATION (µs)
100
1000
10,000
VTH = 5.0V
RESET OCCURS ABOVE LINES
VTH = 3.0V
1
0 400 1200800
MAXIMUM TRANSIENT DURATION vs.
RST IN_ THRESHOLD OVERDRIVE
10
6305 TOC9
OVERDRIVE, VREF - VRST IN (mV)
TRANSIENT DURATION (µs)
100
1000
10,000
VTH = 5.0V
RESET OCCURS ABOVE LINES
VTH = 3.0V
_______________Detailed Description
The MAX6305–MAX6313 CMOS microprocessor (µP)
supervisory circuits are designed to monitor more than
one power supply and issue a system reset when any
monitored supply falls out of regulation. The MAX6305/
MAX6308/MAX6311 have two adjustable undervoltage
reset inputs (RST IN1 and RST IN2). The MAX6306/
MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 mon-
itor VCC through an internal, factory-trimmed voltage
divider. The MAX6306/MAX6309/MAX6312 have, in
addition, an adjustable undervoltage reset input and a
manual-reset input. The internal voltage divider sets the
reset threshold as specified in the device part number
(Table 1). The MAX6307/MAX6310/ MAX6313 feature an
adjustable undervoltage reset input (RST IN) and an
adjustable overvoltage reset input (OVRST IN) in addition
to the factory-trimmed reset threshold on the VCC moni-
tor. Program the adjustable reset inputs with an external
resistor divider (see
Adjustable Reset Inputs
section).
Reset Outputs
A µP’s reset input starts the µP in a known state. These
µP supervisory circuits assert reset to prevent code-
execution errors during power-up, power-down, or
brownout conditions.
RESET (MAX6305–MAX6310) and RESET (MAX6311/
MAX6312/MAX6313) are guaranteed to be asserted at
a valid logic level for VCC > 1V (see
Electrical
Characteristics
). Once all monitored voltages exceed
their programmed reset thresholds, an internal timer
keeps reset asserted for the reset timeout period (tRP);
after this interval, reset deasserts.
If a brownout condition occurs (any or all monitored volt-
ages dip outside their programmed reset threshold),
reset asserts (RESET goes high; RESET goes low). Any
time any of the monitored voltages dip below their reset
threshold, the internal timer resets to zero and reset
asserts. The internal timer starts when all of the moni-
tored voltages return above their reset thresholds, and
reset remains asserted for a reset timeout period. The
MAX6305/MAX6306/MAX6307 feature an active-low,
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
5
______________________________________________________________Pin Description
MAX6305
MAX6308
MAX6311
NAME FUNCTION
Active-Low, Open-Drain Reset Output for the MAX6305/MAX6306/
MAX6307. Active-Low, Push/Pull Reset Output (sources and sinks
current) for the MAX6308/MAX6309/MAX6310.
1
RESET Active-High, Push/Pull Reset Output for the MAX6311/MAX6312/MAX6313
2GND System Ground
OVRST IN
Overvoltage Reset Comparator Input. Asserts reset when the monitored
voltage exceeds the programmed threshold. Set the reset threshold
with an external resistor divider. Connect to GND if unused.
RST IN
Undervoltage Reset Comparator Input. Asserts reset when the
monitored voltage falls below the programmed threshold. Set the
reset threshold with an external resistor divider. Connect to VCC if
unused.
3, 4 RST IN1,
RST IN2
MR
Manual-Reset Input. Pull low to force a reset. RESET/RESET remains
active as long as MR is low and for the timeout period after MR
goes high. Leave unconnected or connect to VCC if unused.
5 VCC
System Supply. The MAX6306/MAX6307/MAX6309/MAX6310/
MAX6312/MAX6313 also monitor VCC through an internal factory-
trimmed resistor divider to the reset comparator.
MAX6306
MAX6309
MAX6312
1
2
4
3
5
MAX6307
MAX6310
MAX6313
PIN
1
2
4
3
5
RESET
MAX6305–MAX6313
open-drain, N-channel output. The MAX6308/MAX6309/
MAX6310 feature an active-low, complementary output
structure that both sinks and sources current, and the
MAX6311/MAX6312/MAX6313 have an active-high com-
plementary reset output.
The MAX6305/MAX6308/MAX6311 switch from under-
voltage lockout operation to normal operation between
1.5V < VCC < 2.5V. Below 1.5V, VCC undervoltage-
lockout mode asserts RESET. Above 2.5V, VCC normal-
operation mode asserts reset if RST IN_ falls below the
RST IN_ threshold.
Manual-Reset Input
(MAX6306/MAX6309/MAX6312)
Many µP-based products require manual-reset capability,
allowing an operator or external logic circuitry to initiate a
reset. A logic low on MR asserts reset. Reset remains
asserted while MR is low, and for a reset active timeout
period (tRP) after MR returns high. This input has an inter-
nal 63.5kpull-up resistor, so it can be left open if it is not
used. MR can be driven with TTL-logic levels in 5V sys-
tems, with CMOS-logic levels in 3V systems, or with open-
drain/collector output devices. Connect a normally open
momentary switch from MR to GND to create a manual-
reset function; external debounce circuitry is not required.
If MR is driven from long cables or if the device is used in
a noisy environment, connecting a 0.1µF capacitor from
MR to ground provides additional noise immunity.
The MR pin has internal ESD-protection circuitry that may
be forward biased under certain conditions, drawing
excessive current. For example, assume the circuitry driv-
ing MR uses a +5V supply other than VCC. If VCC drops or
browns out lower than +4.7V, MR’s absolute maximum rat-
ing is violated (-0.3V to (VCC + 0.3V)), and undesirable
current flows through the ESD structure from MR to VCC.
To avoid this, it is recommended that the supply for the MR
pin be the same as the supply monitored by VCC. In this
way, the voltage at MR will not exceed VCC.
Adjustable Reset Inputs
The MAX6305–MAX6313 each have one or more reset
inputs (RST IN_ /OVRST IN). These inputs are com-
pared to the internal reference voltage (Figure 1).
Connect a resistor voltage divider to RST IN_ such that
VRST IN_ falls below VRSTH (1.23V) when the monitored
voltage (VIN) falls below the desired reset threshold
(VTH) (Figure 2). Calculate the desired reset voltage
with the following formula:
R1 + R2
VTH = ________ x VRSTH
R2
5-Pin, Multiple-Input,
Programmable Reset ICs
6
RST IN1
*
††
†††
+1.23V
+1.23V
+1.23V
+1.23V
RST IN2
RESET
GENERATOR
RESET***
OVRST IN
GND
VCC
VCC
MR
RESET**
MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 ONLY
MAX6305–MAX6310 ONLY
MAX6311/MAX6312/MAX6313 ONLY
MAX6307/MAX6310/MAX6313 ONLY
MAX6305/MAX6308/MAX6311 ONLY
MAX6306/MAX6309/MAX6312 ONLY
MAX6305–MAX6313
*
**
***
††
†††
Figure 1. Functional Diagram
MAX6306 i MAX63W ‘FDR ADDlTlUNAL NDlSE lMMUNlTY T Figure 2 Increasing Noise immunity The :ZSnA max input leakage cur the order of rnegohrns. Choose the divider to minimize the error due to rent The error term in the calculate :ZBnA x Rt if you Choose Rt to be 1MQ‘ t :ZBXTU'QXT x105 : :ZBmV Like the Vcc voltage monitors on th MAXGBOQ/MAXG3TO/MAX6312/M inputs (when used With a voltage at ignore fast voltage transients Incre by connecting a Capacitor on the o RST IN and GND (Figure 2). This Iowpass filter With a corner frequenc f: (1/2n)/(Rt + R2)(R For example lT Rt : 1M9 and R O tuF capacitor from RST IN, t Iowpass corner frequency of f adding capacitance to RST IN slo response time. Application lnferfa Bidirec Since the RESET output on the MAX6307 is open drain‘ these de with uPs that have bidirectional re Motorola 68HCtt. Connecting RESET output directly to the mic pin with a single pull-up resistor a assert reset (Figure 3)
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
7
The ±25nA max input leakage current allows resistors on
the order of megohms. Choose the pull-up resistor in the
divider to minimize the error due to the input leakage cur-
rent. The error term in the calculated threshold is simply:
±25nA x R1
If you choose R1 to be 1M, the resulting error is
±25 x 10-9 x 1 x 106= ±25mV.
Like the VCC voltage monitors on the MAX6306/MAX6307/
MAX6309/MAX6310/MAX6312/MAX6313, the RST IN_
inputs (when used with a voltage divider) are designed to
ignore fast voltage transients. Increase the noise immunity
by connecting a capacitor on the order of 0.1µF between
RST IN and GND (Figure 2). This creates a single-pole
lowpass filter with a corner frequency given by:
f = (1/2π) / (R1 + R2)(R1 x R2 x C)
For example, if R1 = 1Mand R2 = 1.6M, adding a
0.1µF capacitor from RST IN_ to ground results in a
lowpass corner frequency of f = 2.59Hz. Note that
adding capacitance to RST IN slows the circuit’s overall
response time.
__________Applications Information
Interfacing to µPs with
Bidirectional Reset Pins
Since the RESET output on the MAX6305/MAX6306/
MAX6307 is open drain, these devices interface easily
with µPs that have bidirectional reset pins, such as the
Motorola 68HC11. Connecting the µP supervisor’s
RESET output directly to the microcontroller’s RESET
pin with a single pull-up resistor allows either device to
assert reset (Figure 3).
Negative-Going VCC Transients
In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, these devices
are relatively immune to short-duration, negative-going
VCC transients (glitches).
The
Typical Operating Characteristics
show the
Maximum Transient Duration vs. VCC Reset Threshold
Overdrive, for which reset pulses are not generated.
The graph was produced using negative-going pulses,
starting at VTH max, and ending below the pro-
grammed reset threshold by the magnitude indicated
(reset threshold overdrive). The graph shows the maxi-
mum pulse width that a negative-going VCC transient
may typically have without causing a reset pulse to be
issued. As the amplitude of the transient increases (i.e.,
goes farther below the reset threshold), the maximum
allowable pulse width decreases.
RST IN_/OVRST IN are also immune to negative/positive-
going transients (see
Typical Operating Characteristics
).
A 0.1µF bypass capacitor mounted close to the RST IN_,
OVRST IN, and/or the VCC pin provides additional tran-
sient immunity.
Ensuring a Valid
RESET
/RESET
Output Down to VCC = 0V
When VCC falls below 1V, push/pull structured RESET/
RESET current sinking (or sourcing) capabilities
decrease drastically. High-impedance CMOS-logic
inputs connected to RESET can drift to undetermined
voltages. This presents no problem in most applica-
tions, since most µPs and other circuitry do not operate
with VCC below 1V. In those applications where RESET
must be valid down to 0V, adding a pull-down resistor
between RESET and ground sinks any stray leakage
Figure 2. Increasing Noise Immunity
MAX6305–
MAX6313
C*
VIN
R1
R2
RST IN_
GND
*FOR ADDITIONAL NOISE IMMUNITY
VCC
VTH =
(
)
VRSTH
R1 + R2
R2
C =
(
)
R1 + R2
R1 x R2 x C
1
2π
Figure 3. Interfacing to µPs with Bidirectional Reset I/O
MAX6305
MAX6306
MAX6307
RESET
GENERATOR
GND GND
VCC VCC
RESET RESET
µP
currents, holding RESET low (Figure 4). The pull-down
resistor’s value is not critical; 100kis large enough not
to load RESET and small enough to pull RESET to
ground. For applications where RESET must be valid to
VCC, a 100kpull-up resistor between RESET and VCC
will hold RESET high when VCC falls below 1V (Figure 5).
Since the MAX6305/MAX6306/MAX6307 have open-
drain, active-low outputs, they typically use a pull-up
resistor. With these devices and under these conditions
(VCC < 1V), RESET will most likely not maintain an
active condition, but will drift toward a nonactive level
due to the pull-up resistor and the RESET output’s
reduction in sinking capability. These devices are not
recommended for applications that require a valid
RESET output below 1V.
SUFFIX TA= +25°C TA
= -40°C to +85°C
00 Preprogrammed Threshold
Not Available
Preprogrammed
Threshold Not
Available
50 4.925 5.000 5.075 4.875 5.125
49 4.827 4.900 4.974 4.778 5.023
48 4.728 4.800 4.872 4.680 4.920
47 4.630 4.700 4.771 4.583 4.818
46 4.561 4.630 4.699 4.514 4.746
45 4.433 4.500 4.568 4.388 4.613
44 4.314 4.380 4.446 4.270 4.490
43 4.236 4.300 4.365 4.193 4.408
42 4.137 4.200 4.263 4.095 4.305
41 4.039 4.100 4.162 3.998 4.203
40 3.940 4.000 4.060 3.900 4.100
39 3.842 3.900 3.959 3.803 3.998
38 3.743 3.800 3.857 3.705 3.895
37 3.645 3.700 3.756 3.608 3.793
36 3.546 3.600 3.654 3.510 3.690
35 3.448 3.500 3.553 3.413 3.588
34 3.349 3.400 3.451 3.315 3.485
33 3.251 3.300 3.350 3.218 3.383
32 3.152 3.200 3.248 3.120 3.280
31 3.034 3.080 3.126 3.003 3.157
30 2.955 3.000 3.045 2.925 3.075
29 2.886 2.930 2.974 2.857 3.000
28 2.758 2.800 2.842 2.730 2.870
27 2.660 2.700 2.741 2.633 2.768
26 2.591 2.630 2.669 2.564 2.696
25 2.463 2.500 2.538 2.438 2.563
*
Factory-trimmed reset thresholds are available in approximately
100mV increments with a ±1.5% room-temperature variance.
MIN TYP MAX
MIN MAX
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
8
MAX6308
MAX6309
MAX6310
GND
100k
VCC
VCC
RESET
MAX6311
MAX6312
MAX6313
GND
100k
VCC
VCC
RESET
Figure 4. Ensuring RESET Valid to V
CC
= 0V
Figure 5. Ensuring RESET Valid to V
CC
= 0V
Table 1. Factory-Trimmed Reset
Thresholds*
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
9
MAX6309
5V
3.3V
RST IN MR
GND
VCC RESET RESET IN
3.3V
µP
Typical Operating CircuitOrdering Information (continued)
The MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/
MAX6313 are available with factory-set V
CC
reset thresholds from
2.5V to 5V, in 0.1V increments. Insert the desired nominal reset
threshold (from Table 1) into the blanks following the letters UK.
All parts also offer factory-programmed reset timeout periods.
Insert the number corresponding to the desired nominal timeout
period index following the “D” in the part number (D1 = 1ms min,
D2 = 20ms min, D3 = 140ms min, and D4 = 1120ms min). There
are 10 standard versions with a required order increment of 2,500
pieces. Sample stock is generally held on the standard versions
only (see Standard Versions table). Required order increment is
10,000 pieces for non-standard versions. Contact factory for avail-
ability of non-standard versions. All devices available in tape-and-
reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Standard Versions Table
PARTTEMP RANGE PIN -
PA C K A G E
MAX6306UK_ _D_-T -0°C to +70°C 5 SOT23
MAX6306EUK_ _D_-T
-40°C to +85°C 5 SOT23
MAX6307UK_ _D_-T -0°C to +70°C 5 SOT23
MAX6307EUK_ _D_-T
-40°C to +85°C 5 SOT23
MAX6308UK00D_-T -0°C to +70°C 5 SOT23
MAX6308EUK00D_-T
-40°C to +85°C 5 SOT23
MAX6309UK_ _D_-T -0°C to +70°C 5 SOT23
MAX6309EUK_ _D_-T
-40°C to +85°C 5 SOT23
MAX6310UK_ _D_-T -0°C to +70°C 5 SOT23
MAX6310EUK_ _D_-T
-40°C to +85°C 5 SOT23
MAX6311UK00D_-T -0°C to +70°C 5 SOT23
MAX6311EUK00D_-T
-40°C to +85°C 5 SOT23
MAX6312UK_ _D_-T -0°C to +70°C 5 SOT23
MAX6312EUK_ _D_-T
-40°C to +85°C 5 SOT23
MAX6305UK00D3-T MAX6309UK29D3-T
MAX6306UK29D3-T MAX6309UK46D3-T
MAX6306UK46D3-T MAX6311UK00D3-T
MAX6307UK46D3-T MAX6312UK29D3-T
MAX6308UK00D3-T MAX6312UK46D3-T
www.maxim»ic.comlpackages MM
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
10
GND
OVRST IN
RST IN
15VCC
(RESET) RESET
MAX6307
MAX6310
MAX6313
SOT23-5
2
34
GND
RST IN
MR
15VCC
(RESET) RESET
MAX6306
MAX6309
MAX6312
SOT23-5
2
34
GND
RST IN2
RST IN1
15VCC
(RESET) RESET
MAX6305
MAX6308
MAX6311
SOT23-5
TOP VIEW
2
34
( ) ARE FOR MAX6311 ( ) ARE FOR MAX6312 ( ) ARE FOR MAX6313
Pin Configurations
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.
PACKAGE
TYPE
PACKAGE
CODE OUTLINE NO. LAND
PATTERN NO.
5 SOT23 U5+1 21-0057 90-0174
MAX6305–MAX6313
5-Pin, Multiple-Input,
Programmable Reset ICs
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, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 ________________
11
© 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 9/96 Initial release
1 8/98 Make corrections to EC table and Figures 1 and 8. 3, 6, 8
2 4/99 Added Standard Versions Table and note to the Ordering Information table. Text
added to the General Description.1, 13
3 11/05 Added lead-free option to the Ordering Information table. 1, 13
4 12/07 Updated Table 2 and Package Outline. 9, 10, 14
5 4/08 Added MAX6305E–MAX6313E to Ordering Information table, updated Electrical
Characteristics table and global conditions, updated Table 1, and removed Table 2. 1, 2, 3, 8–15
6 7/12 Updated the Electrical Characteristics table. 2

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