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PDF MAX6363 Data sheet ( Hoja de datos )
| Número de pieza | MAX6363 | |
| Descripción | SOT23 / Low-Power P Supervisory Circuits with Battery Backup | |
| Fabricantes | Maxim Integrated | |
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19-1615; Rev 0; 1/00
SOT23, Low-Power µP Supervisory Circuits
with Battery Backup
General Description
The MAX6361/MAX6363/MAX6364 supervisory circuits
reduce the complexity and number of components
required for power-supply monitoring and battery control
functions in microprocessor (µP) systems. The circuits sig-
nificantly improve system reliability and accuracy com-
pared to that obtainable with separate ICs or discrete
components. Their functions include µP reset, backup-
battery switchover, and power failure warning.
The MAX6361/MAX6363/MAX6364 operate from supply
voltages as low as +1.2V. The factory preset reset
threshold voltage ranges from 2.32V to 4.63V (see
Ordering Information). These devices provide a manual
reset input (MAX6361), battery-on output (MAX6363),
and an auxiliary adjustable reset input (MAX6364). In
addition, each part type is offered in three reset output
versions: an active-low push-pull reset, an active-low
open-drain reset, and an active-high push-pull reset
(see Selector Guide at end of data sheet).
Features
o Low +1.2V Operating Supply Voltage
(VCC or VBATT)
o Precision Monitoring of +5.0V, +3.3V, +3.0V, and
+2.5V Power-Supply Voltages
o Debounced Manual Reset Input (MAX6361)
o Battery-On Output Indicator (MAX6363)
o Auxiliary User-Adjustable RESET IN (MAX6364)
o Three Available Output Structures
Push-Pull RESET, Open-Drain RESET,
Push-Pull RESET
o RESET/RESET Valid Down to 1.2V Guaranteed
(VCC or VBATT)
o Power-Supply Transient Immunity
o 150ms (min) Reset Timeout Period
o Small 6-Pin SOT23 Package
Computers
Controllers
Intelligent Instruments
Critical µP/µC
Power Monitoring
Applications
Fax Machines
Industrial Control
POS Equipment
Portable/Battery-Powered
Equipment
TOP VIEW
Pin Configurations
RESET, RESET 1
6 BATT
MAX6361
GND 2
5 OUT
Ordering Information
PART
MAX6361LUT_ _-T
MAX6361PUT_ _-T
MAX6361HUT_ _-T
MAX6363LUT_ _-T
MAX6363PUT_ _-T
MAX6363HUT_ _-T
MAX6364LUT_ _-T
MAX6364PUT_ _-T
MAX6364HUT_ _-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
Note: These parts offer a choice of reset threshold voltages.
From Table 1, select the suffix corresponding to the desired
threshold voltage and insert it into the part number to complete
it. When ordering from the factory, there is a 2500-piece mini-
mum on the SOT package (tape-and-reel only).
MR 3
4 VCC
SOT23-6
Pin Configurations continued at end of data sheet.
Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1 page  
SOT23, Low-Power µP Supervisory Circuits
with Battery Backup
(TA = +25°C, unless otherwise noted.)
MAX6364
RESET IN THRESHOLD
vs. TEMPERATURE
1.236
Typical Operating Characteristics (continued)
MAX6364
RESET IN TO RESET PROPAGATION DELAY
vs. TEMPERATURE
2.8 VOD = 50mV
2.5
2.2
1.235
1.9
1.6
1.3
1.234
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
1.0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
Pin Description
PIN NAME
FUNCTION
Active-High Reset Output (for H versions). RESET remains high while VCC is below the reset threshold
RESET
and for at least 150ms (tRP) after VCC rises above the reset threshold. RESET also asserts when MR or
RESET IN is low.
1
Active-Low Reset Output (for L and P versions). RESET remains low while VCC is below the reset thresh-
RESET
old and for at least 150ms (tRP) after VCC rises above the reset threshold. RESET also asserts when MR
or RESET IN is low.
2
GND
Ground
MAX6361 Manual-Reset Input. Maintaining logic low on MR asserts a reset. Reset output remains assert-
MR ed for at least 150ms (tRP) after MR transitions from low to high. Leave unconnected or connected to VCC
if not used.
3 BATT ON MAX6363 Battery-On Output. BATT ON goes high in battery backup mode.
RESET IN
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 (tRP) after RESET IN goes high.
4
VCC
Supply Voltage. Reset is asserted when VCC drops below the reset threshold voltage (VTH). Reset
remains asserted until VCC rises above VTH and for at least 150ms after VCC rises above VTH.
5
OUT
Output. OUT sources from VCC when it is above the reset threshold (VTH), and from the greater of VCC or
BATT when VCC is below VTH.
Backup-Battery Input. When VCC falls below the reset threshold, BATT switches to OUT if VBATT is 20mV
6
BATT
greater than VCC. When VCC rises 20mV above VBATT, VCC switches to OUT. The 40mV hysteresis
prevents repeated switching if VCC falls slowly.
Detailed Description
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 VCC if VCC is greater than the
reset threshold, or to the greater of VCC or VBATT when
VCC is less than the reset threshold. OUT can supply up
to 150mA from VCC. When VCC is higher than VBATT, the
BATT ON (MAX6363) output is low. When VCC is lower
than VBATT, an internal MOSFET connects the backup
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.
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MAX6363.PDF ] | |
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