MAX6303CSA Maxim Integrated Products, MAX6303CSA Datasheet - Page 5

• Manufacturer Part Number: MAX6303CSA
• Description: IC SUPERVISORY CIRC 5V LP 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Simple Reset/Power-On Resetr

Specifications of MAX6303CSA

• Number Of Voltages Monitored: 1
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Reset Timeout: 2.8 ms Minimum
• Voltage - Threshold: Adjustable/Selectable
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PIN
1
2
3
4
5
6
7
8
(MAX6301/
(MAX6302/
MAX6303)
RESET IN
MAX6304
RESET
RESET
NAME
GND
WDS
SWT
WDI
V
SRT
CC
_______________________________________________________________________________________
+5V, Low-Power µP Supervisory Circuits
Reset Input. High-impedance input to the reset comparator. Connect this pin to the center point of an
external resistor voltage-divider network to set the reset threshold voltage. The reset threshold voltage is
calculated as follows: V
Ground
Set Reset-Timeout Input. Connect a capacitor between this input and ground to select the reset timeout
period (t
Typical Operating Circuit).
Set Watchdog-Timeout Input. Connect a capacitor between this input and ground to select the basic
watchdog timeout period (t
t
Watchdog-Select Input. This input selects the watchdog mode. Connect to ground to select normal mode
and the basic watchdog timeout period. Connect to V
timeout period by a factor of 500. A change in the state of this pin resets the watchdog timer to zero.
Watchdog Input. A rising or falling transition must occur on this input within the selected watchdog timeout
period, or a reset pulse will occur. The capacitor value selected for SWT and the state of WDS determine
the watchdog timeout period. The watchdog timer clears and restarts when a transition occurs on WDI or
WDS. The watchdog timer is cleared when reset is asserted and restarted after reset deasserts. In the
extended watchdog mode (WDS = V
three-stated driver or by leaving WDI unconnected.
Open-Drain, Active-Low Reset
Output (MAX6301)
Push-Pull, Active-Low Reset
Output (MAX6303)
Open-Drain, Active-High Reset
Output (MAX6302)
Push-Pull, Active-High Reset
Output (MAX6304)
Supply Voltage. Bypass to ground with a 0.1µF capacitor placed as close as possible to the pin.
WD
in µs. The watchdog function can be disabled by connecting this pin to ground.
RP
). Determine the period as follows: t
with Adjustable Reset/Watchdog
RST
WD
= 1.22 x (R1 + R2)/R2 (see the Typical Operating Circuit).
). Determine the period as follows: t
RESET changes from high to low whenever the monitored voltage (V
drops below the selected reset threshold (V
long as V
for the reset timeout period and then goes high. The watchdog timer
triggers a reset pulse (t
is exceeded.
RESET changes from low to high whenever the monitored voltage (V
drops below the selected reset threshold (V
long as V
for the reset timeout period and then goes low. The watchdog timer
triggers a reset pulse (t
is exceeded.
CC
), the watchdog function can be disabled by driving WDI with a
IN
IN
is below V
is below V
RP
FUNCTION
= 2.67 x C
CC
RST
RST
RP
RP
to select extended mode, multiplying the basic
. Once V
. Once V
) whenever the watchdog timeout period (t
) whenever the watchdog timeout period (t
SRT
, with C
WD
IN
IN
= 2.67 x C
exceeds V
exceeds V
SRT
in pF and t
RST
RST
SWT
Pin Description
). RESET remains low as
). RESET remains high as
RST
RST
, with C
, RESET remains low
, RESET remains high
RP
in µs (see the
SWT
in pF and
WD
IN
WD
IN
)
)
)
)
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