MAX6362 MAXIM [Maxim Integrated Products], MAX6362 Datasheet - Page 5

• Manufacturer Part Number: MAX6362
• Description: SOT23, Low-Power ?P Supervisory Circuits with Battery Backup
• Manufacturer: MAXIM [Maxim Integrated Products]

(T
The Typical Operating Circuit shows a typical connec-
tion for the MAX6361/MAX6363/MAX6364 family. OUT
powers the static random-access memory (SRAM). OUT
is internally connected to V
reset threshold, or to the greater of V
V
CC
A
PIN
= +25°C, unless otherwise noted.)
1
2
3
4
5
6
is less than the reset threshold. OUT can supply up
1.236
1.235
1.234
RESET IN
BATT ON
SOT23, Low-Power µP Supervisory Circuits
RESET
RESET
NAME
BATT
GND
OUT
V
MR
CC
-40
_______________________________________________________________________________________
-20
RESET IN THRESHOLD
vs. TEMPERATURE
Detailed Description
Active-High Reset Output (for H versions). RESET remains high while V
and for at least 150ms (t
RESET IN is low.
Active-Low Reset Output (for L and P versions). RESET remains low while V
old and for at least 150ms (t
or RESET IN is low.
Ground
MAX6361 Manual-Reset Input. Maintaining logic low on MR asserts a reset. Reset output remains assert-
ed for at least 150ms (t
if not used.
MAX6363 Battery-On Output. BATT ON goes high in battery backup mode.
MAX6364 Reset Input. When RESET IN falls below 1.235V, reset is asserted. Reset output remains
asserted as long as RESET IN is low and for at least 150ms (t
Supply Voltage. Reset is asserted when V
remains asserted until V
Output. OUT sources from V
BATT when V
Backup-Battery Input. When V
greater than V
prevents repeated switching if V
0
TEMPERATURE (°C)
MAX6364
CC
20
if V
40
CC
CC
CC
60
CC
is greater than the
is below V
. When V
80
or V
Typical Operating Characteristics (continued)
RP
CC
RP
BATT
) after MR transitions from low to high. Leave unconnected or connected to V
CC
) after V
TH
rises above V
RP
CC
rises 20mV above V
.
CC
) after V
when
when it is above the reset threshold (V
CC
falls below the reset threshold, BATT switches to OUT if V
CC
falls slowly.
rises above the reset threshold. RESET also asserts when MR or
CC
TH
rises above the reset threshold. RESET also asserts when MR
CC
to 150mA from V
BATT ON (MAX6363) output is low. When V
than V
battery to OUT. The on-resistance of the MOSFET is a
function of backup-battery voltage and is shown in the
Battery to Out On-Resistance vs. Temperature graph in
the Typical Operating Characteristics section.
and for at least 150ms after V
drops below the reset threshold voltage (V
FUNCTION
BATT
with Battery Backup
BATT
, V
, an internal MOSFET connects the backup
CC
2.8
2.5
2.2
1.9
1.6
1.3
1.0
switches to OUT. The 40mV hysteresis
RESET IN TO RESET PROPAGATION DELAY
-40
RP
CC
V
OD
) after RESET IN goes high.
. When V
= 50mV
-20
vs. TEMPERATURE
TH
CC
0
TEMPERATURE (°C)
), and from the greater of V
CC
MAX6364
is below the reset threshold
CC
CC
20
rises above V
is below the reset thresh-
Pin Description
is higher than V
40
60
TH
). Reset
TH
80
BATT
.
CC
is 20mV
BATT
is lower
CC
, the
CC
or
5