MAX6417UK+T Maxim Integrated Products, MAX6417UK+T Datasheet - Page 5

IC MPU/RESET CIRC SOT23-5

MAX6417UK+T

Manufacturer Part Number
MAX6417UK+T
Description
IC MPU/RESET CIRC SOT23-5
Manufacturer
Maxim Integrated Products
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of MAX6417UK+T

Number Of Voltages Monitored
1
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
Adjustable/Selectable
Voltage - Threshold
Adjustable/Selectable
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Monitored Voltage
1.6 V to 5 V
Manual Reset
No
Watchdog
No
Battery Backup Switching
No
Power-up Reset Delay (typ)
5.4 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1 V
Supply Current (typ)
2.7 uA (Typ)
Maximum Power Dissipation
571 mW
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 125 C
Chip Enable Signals
No
Minimum Operating Temperature
- 40 C
Output Type
Active Low or Open Drain
Power Fail Detection
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX6417UK+TTR
The MAX6412–MAX6420 low-power microprocessor
(µP) supervisory circuits provide maximum adjustability
for supply-voltage monitoring and reset functionality. In
addition, the MAX6412–MAX6420 reset timeout period
is adjustable using an external capacitor.
The MAX6412/MAX6413/MAX6414 have factory-
trimmed reset threshold voltages in approximately
100mV increments from 1.575V to 5.0V with a manual
reset input. The MAX6415/MAX6416/MAX6417 contain
a reset threshold that can be adjusted to any voltage
above 1.26V using external resistors. The MAX6418/
MAX6419/MAX6420 offer both a factory-trimmed reset
threshold and an adjustable reset threshold input for
dual-voltage monitoring.
A reset signal is asserted when V
falls below the preset values or when MR is asserted.
The reset remains asserted for an externally pro-
grammed interval after V
above the reset threshold or MR is deasserted.
MAX6412/
MAX6413/
MAX6414
Low-Power, Single/Dual-Voltage µP Reset Circuits
2
3
4
5
1
with Capacitor-Adjustable Reset Timeout Delay
MAX6415/
MAX6416/
MAX6417
PIN
1
2
3
4
5
_______________________________________________________________________________________
Detailed Description
CC
MAX6418/
MAX6419/
MAX6420
and/or RESET IN has risen
1
2
3
4
5
CC
and/or RESET IN
RESET
RESET
RESET
NAME
GND
SRT
V
MR
IN
CC
RESET changes from high to low whenever V
the selected reset threshold voltage (V
manual reset is pulled low. RESET remains low for the reset timeout period
after all reset conditions are deasserted and then goes high.
RESET changes from low to high whenever the V
below the selected reset threshold voltage (V
reset is pulled low. RESET remains high for the reset timeout period after all
reset conditions are deasserted and then goes low.
Ground
Reset Input. High-impedance input to the adjustable reset comparator.
Connect RESET IN to the center point of an external resistor-divider
network to set the threshold of the externally monitored voltage. See Reset
Threshold section.
Manual Reset Input. Pull this pin low to manually reset the device. Reset
remains asserted for the reset timeout period after MR is released.
Set Reset Timeout Input. Connect a capacitor between SRT and ground to
set the timeout period. Determine the period as follows:
t
Supply Voltage and Input for Fixed-Threshold V
RP
= (2.71 x 10
The reset output is typically connected to the reset
input of a µP. A µP’s reset input starts or restarts the µP
in a known state. The MAX6412–MAX6420 µP supervi-
sory circuits provide the reset logic to prevent code-
execution errors during power-up, power-down, and
brownout conditions (see Typical Operating Circuit ).
For the MAX6413, MAX6416, and MAX6419, RESET
changes from low to high whenever V
drops below the reset threshold voltages. Once RESET
IN and V
age(s), RESET remains high for the reset timeout period,
then goes low.
On power-up, once V
teed to be a logic high. For applications requiring valid
reset logic when V
Ensuring a Valid RESET/RESET Output Down to V
The active-low RESET output of the remaining supervi-
sors is the inverse of the MAX6413, MAX6416, and
MAX6419 active-high RESET output and is guaranteed
valid for V
6
)
C
SRT
CC
CC
+ 275µs with t
exceed their respective reset threshold volt-
≥ 1V.
FUNCTION
CC
CC
TH
RP
is less than 1V, see the section
or V
reaches 1V, RESET is guaran-
in seconds and C
TH
CC
RESET IN
CC
or V
CC
Pin Description
or RESET IN drops below
Monitor
or RESET IN drops
RESET IN
, respectively) or
Reset Output
CC
SRT
) or manual
or RESET IN
in Farads.
CC
= 0V .
5

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