MAX6701-08_03 MAXIM [Maxim Integrated Products], MAX6701-08_03 Datasheet - Page 6

• Manufacturer Part Number: MAX6701-08_03
• Description: Low-Voltage, SOT23 ?P Supervisors with Power- Fail In/Out, Manual Reset, and Watchdog Timer
• Manufacturer: MAXIM [Maxim Integrated Products]

Figures 1, 2, and 3 are functional diagrams for the
MAX6705(A)/MAX6706(A)/MAX6707(A), MAX6704/
MAX6708, and MAX6701(A)/ MAX6702(A)/MAX6703(A),
respectively.
A microprocessor’s (µP’s) reset input starts the µP in a
known state. The MAX6701–MAX6708 assert reset dur-
ing power-up and prevent code execution errors during
power-down or brownout conditions.
On power-up, once V
anteed logic low of 0.4V or less. As V
Low-Voltage, SOT23 µP Supervisors with Power-
Fail In/Out, Manual Reset, and Watchdog Timer
*RESET active-high for the MAX6702(A)/MAX6706(A).
6
MAX6701(A)
MAX6702(A)
MAX6703(A)
_______________________________________________________________________________________
7*
8
4
5
MAX6704
—
—
—
8
CC
PIN
Detailed Description
MAX6705(A)
MAX6706(A)
MAX6707(A)
reaches 1V, RESET is a guar-
—
—
7*
8
MAX6708
Reset Output
CC
—
—
—
8
rises, RESET
RST_IN1
RST_IN2
RESET
NAME
WDO
Active-Low Watchdog Output (Open Drain or Push-Pull). WDO
is asserted whenever the watchdog times out and V
reset inputs are below their respective thresholds. WDO
deasserts after a valid WDI transition without a reset timeout
period. In the A versions, WDO deasserts without a timeout
delay when V
threshold. Pull MR low to assert WDO (MAX6701/MAX6702/
MAX6703/MAX6705/MAX6706/MAX6707 only). Pull MR low to
deassert WDO (MAX6701(A)/MAX6702(A)/MAX6703(A)/
MAX6705(A)/MAX6706(A)MAX6707(A) only).
Active-High Reset Output (Push-Pull). RESET changes from low
to high when the V
threshold (or RST_IN1/RST_IN2 for MAX6701(A)/MAX6702(A)/
MAX6703(A), MR is pulled low, or the watchdog triggers a
reset (MAX6704 only). RESET remains high for the reset
timeout period after the reset conditions are terminated.
Input for User-Adjustable V
for second internal reset comparator. Connect this pin to an
external resistive-divider network to set the reset threshold
voltage; 0.62V (typ) threshold. Connect to V
Reset is asserted when either V
below threshold.
Input for User-Adjustable V
for third internal reset comparator. Connect this pin to an
external resistive-divider network to set the reset threshold
voltage; 0.62V (typ) threshold. Connect to V
Reset is asserted when either V
below threshold.
stays low. After V
the reset threshold, an internal timer holds RESET low
for about 200ms. RESET pulses low whenever V
below the reset threshold, including brownout condi-
tions. If a brownout occurs in the middle of a previously
initiated reset pulse, the pulse continues for at least
another 140ms. On power-down, once V
the reset threshold, RESET stays low and is guaranteed
to be 0.4V or less, until V
The MAX6702(A)/MAX6704/MAX6706(A)/MAX6708
active-high RESET output is the complement of the
RESET output, and is guaranteed to be valid with V
down to 1V.
CC
Pin Description (continued)
, RST_IN1, and RST_IN2 rises above its
CC
input drops below the selected reset
CC
, RST_IN1, or RST_IN2 rise above
FUNCTION
CC2
CC3
CC
CC
CC
Monitor. High-impedance input
Monitor. High-impedance input
drops below 1V.
, RST_IN1, or RST_IN2 are
, RST_IN1, or RST_IN2 are
CC
CC
when not used.
when not used.
CC
CC
falls below
or the
CC
dips
CC