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MAX6318LHUK46BX+T

P1-P3P4-P6P7-P9P10-P12P13-P14
MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
Selector Guide
General Description
The MAX6316–MAX6322 family of microprocessor (µP)
supervisory circuits monitors power supplies and
microprocessor activity in digital systems. It offers sev-
eral combinations of push/pull, open-drain, and bidirec-
tional (such as Motorola 68HC11) reset outputs, along
with watchdog and manual reset features. The
Selector
Guide
below lists the specific functions available from
each device.
These devices are available in 26 factory-trimmed reset
threshold voltages (from 2.5V to 5V, in 100mV incre-
ments), featuring four minimum power-on reset timeout
periods (from 1ms to 1.12s), and four watchdog timeout
periods (from 6.3ms to 25.6s). Thirteen standard ver-
sions are available with an order increment requirement
of 2500 pieces (see
Standard Versions
table); contact
the factory for availability of other versions, which have
an order increment requirement of 10,000 pieces.
The MAX6316–MAX6322 are offered in a miniature
5-pin SOT23 package.
Applications
Portable Computers
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Embedded Control Systems
Benefits and Features
• Integrated Configuration Enables Flexible Designs
• Available in 26 Reset-Threshold Voltages
- 2.5V to 5V, in 100mV Increments
• Four Reset Timeout Periods
- 1ms, 20ms, 140ms, or 1.12s (min)
• Four Watchdog Timeout Periods
- 6.3ms, 102ms, 1.6s, or 25.6s (typ)
• Four Reset Output Stages
- Active-High, Push/Pull
- Active-Low, Push/Pull
- Active-Low, Open-Drain
- Active-Low, Bidirectional
• Integrated Features Increase Robustness
• Guaranteed Reset Valid to V
CC
= 1V
• Immune to Short-Negative V
CC
Transients
• Saves Board Space
• No External Components
• Small 5-Pin SOT23 Package
Ordering Information continued at end of data sheet.
ACTIVE-LOW
OPEN-DRAIN
MAX6316L
MAX6316M
MAX6317H
MAX6321HP
MAX6318LH
—
MAX6318MH
—
MAX6319LH —
MAX6319MH —
MAX6320P
ACTIVE-LOW
PUSH/PULL
—
—
—
—
—
ACTIVE-HIGH
PUSH/PULL
—
—
—
ACTIVE-LOW
BIDIRECTIONAL
—
—
—
—
—
PART
WATCHDOG
INPUT
MANUAL
RESET
INPUT
— —
—
—
MAX6322HP —
—
—
—
—
—
—
RESET OUTPUTS*
—
—
*
The MAX6318/MAX6319/MAX6321/MAX6322 feature two types of reset output on each device.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
Devices are available in both leaded and lead(Pb)-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
/V Denotes an automotive-qualified part.
PART
TEMP RANGE
PIN-PACKAGE
MAX6316LUK_ _ _ _ - T
-40°C to +125°C
5 SOT23
MAX6316LUK_ _ _ _ / V + T
-40°C to +125°C
5 SOT23
MAX6316MUK_ _ _ _ - T
-40°C to +125°C
5 SOT23
MAX6317HUK_ _ _ _ - T
-40°C to +125°C
5 SOT23
MAX6318HUK_ _ _ _ - T
-40°C to +125°C
5 SOT23
MAX6318MHUK_ _ _ _ - T
-40°C to +125°C
5 SOT23
19-0496; Rev 12; 4/15
Ordering Information
MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
Maxim Integrated | 2www.maximintegrated.com
Absolute Maximum Ratings
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.
Voltage (with respect to GND)
V
CC
......................................................................-0.3V to +6V
RESET
(MAX6320/MAX6321/MAX6322 only)...... -0.3V to +6V
All Other Pins.........................................-0.3V to (V
CC
+ 0.3V)
Input/Output Current, All Pins .............................................20mA
Continuous Power Dissipation (T
A
= +70°C)
SOT23 (derate 7.1mW/°C above +70°C)...............571mW
Operating Temperature Range..........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range..............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow)
Leaded Package .........................................................+240°C
Lead-Free Package.....................................................+260°C
Note 1:
Overtemperature limits are guaranteed by design, not production tested.
Note 2:
A factory-trimmed voltage divider programs the nominal reset threshold (V
TH
). Factory-trimmed reset thresholds are
available in 100mV increments from 2.5V to 5V (see Table 1 at end of data sheet).
Note 3:
Guaranteed by design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range V
CC
T
A
= -40°C to +125°C 1.0 5.5 V
V
CC
= 5.5V 10 20
MAX6316/MAX6317/MAX
6318/MAX6320/MAX6321
V
CC
= 3.6V 5 12
V
CC
= 5.5V 3 12
Supply Current I
CC
MAX6319/MAX6322:
MR unconnected
V
CC
= 3.6V 3 8
µA
Reset Threshold
Temperature Coefficient
ΔV
TH
/°C 40 ppm/°C
T
A
= +25°C V
TH
- 1.5% V
TH
V
TH
+ 1.5%
Reset Threshold (Note 2) V
RST
T
A
= -40°C to +125°C V
TH
- 2.5% V
TH
V
TH
+ 2.5%
V
Reset Threshold Hysteresis 3mV
MAX63_ _ A_-T 1 1.4 2
MAX63_ _ B_-T 20 28 40
MAX63_ _ C_-T 140 200 280
Reset Active Timeout Period t
RP
MAX63_ _ D_-T 1120 1600 2240
ms
V
CC
to RESET Delay t
RD
V
CC
falling at 1mV/µs 40 µs
PUSH/PULL RESET OUTPUT (MAX6316L/MAX6317H/MAX6318_H/MAX6319_H/MAX6321HP/MAX6322HP)
V
CC
≥ 1.0V, I
SINK
= 50µA 0.3
V
CC
≥ 1.2V, I
SINK
= 100µA 0.3
V
CC
≥ 2.7V, I
SINK
= 1.2mA 0.3
V
OL
V
CC
≥ 4.5V, I
SINK
= 3.2mA 0.4
V
CC
≥ 2.7V, I
SOURCE
= 500µA 0.8 x V
CC
RESET Output Voltage
V
OH
V
CC
≥ 4.5V, I
SOURCE
= 800µA V
CC
- 1.5
V
RES ET Ri se Ti m e ( M AX 6316L,
M AX 6318LH , M AX 6319LH )
t
R
Rise time is measured from 10% to 90%
of V
CC
; C
L
= 5pF, V
CC
= 3.3V (Note 3)
525 ns
V
CC
≥ 2.7V, I
SINK
= 1.2mA 0.3
V
OL
V
CC
≥ 4.5V, I
SINK
= 3.2mA 0.4
V
CC
≥ 1.8V, I
SOURCE
= 150µA 0.8 x V
CC
V
CC
≥ 2.7V, I
SOURCE
= 500µA 0.8 x V
CC
RESET Output Voltage
V
OH
V
CC
≥ 4.5V, I
SOURCE
= 800µA V
CC
- 1.5
V
Electrical Characteristics
(V
CC
= 2.5V to 5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
Maxim Integrated | 3www.maximintegrated.com
Note 4: This is the minimum time RESET must be held low by an external pulldown source to set the active pullup flip-flop.
Note 5: Measured from RESET V
OL
to (0.8 x V
CC
), R
LOAD
= ∞.
Note 6: WDI is internally serviced within the watchdog period if WDI is left unconnected.
Note 7: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is
designed for a three-stated-output device with a 10µA maximum leakage current and capable of driving a maximum capac-
itive load of 200pF. The three-state device must be able to source and sink at least 200µA when active.
Electrical Characteristics (continued)
(V
CC
= 2.5V to 5.5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
BIDIRECTIONAL RESET OUTPUT (MAX6316M/MAX6318MH/MAX6319MH)
Transitional Flip-Flop Setup Time t
S
(Note 4) 400 ns
V
CC
= 3.0V, C
L
= 120pF 333
V
CC
= 5.0V, C
L
= 200pF 333
V
CC
= 3.0V, C
L
= 250pF 666
RESET Output Rise Time
(Note 5)
t
R
V
CC
= 5.0V, C
L
= 400pF 666
ns
Active Pullup Enable Threshold V
PTH
V
CC
= 5.0V 0.4 0.65 V
RESET Active Pullup Current
V
CC
= 5.0V 20 mA
T
A
= -40°C to +85°C 4.2 4.7 5.2
RESET Pullup Resistance
T
A
= -40°C to +125°C 3.6 4.7 5.8
kΩ
OPEN-DRAIN RESET OUTPUT (MAX6320P/MAX6321HP/MAX6322HP)
V
CC
> 1.0V, I
SINK
= 50µA 0.3
V
CC
> 1.2V, I
SINK
= 100µA 0.3
V
CC
> 2.7V, I
SINK
= 1.2mA 0.3
RESET Output Voltage V
OL
V
CC
> 4.5V, I
SINK
= 3.2mA 0.4
V
Open-Drain Reset Output
Leakage Current
I
LKG
1.0 µA
WATCHDOG INPUT (MAX6316/MAX6317H/MAX6318_H/MAX6320P/MAX6321HP)
MAX63_ _ _W-T 4.3 6.3 9.3
MAX63_ _ _X-T 71 102 153
ms
MAX63_ _ _Y-T 1.12 1.6 2.4
Watchdog Timeout Period t
WD
MAX63_ _ _Z-T 17.9 25.6 38.4
s
WDI Pulse Width t
WDI
V
IL
= 0.3 x V
CC,
V
IH
= 0.7 x V
CC
50 ns
V
IL
0.3 x V
CC
WDI Input Threshold
V
IH
(Note 6)
0.7 x V
CC
V
WDI = V
CC
, time average 120 160
WDI Input Current
(Note 7)
I
WDI
V
WDI
= 0V, time average -20 -15
µA
MANUAL RESET INPUT (MAX6316_/MAX6317H/MAX6319_H/MAX6320P/MAX6322HP)
V
IL
0.8
V
IH
V
TH
> 4.0V
2.0
V
IL
0.3 x V
CC
MR Input Threshold
V
IH
V
TH
< 4.0V
0.7 x V
CC
V
T
A
= -40°C to +85°C 1
MR Input Pulse Width
T
A
= -40°C to +125°C 1.5
µs
MR Glitch Rejection 100 ns
MR Pullup Resistance 35 52 75 kΩ
MR to Reset Delay V
CC
= 5V 230 ns
P1-P3P4-P6P7-P9P10-P12P13-P14

MAX6318LHUK46BX+T

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Buy MAX6318LHUK46BX+T
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits 5-Pin uPower Supervisor
Lifecycle:
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