MAX6368LKA46-T Maxim Integrated, MAX6368LKA46-T Datasheet

no-image

MAX6368LKA46-T

Manufacturer Part Number
MAX6368LKA46-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6365, MAX6366, MAX6367, MAX6368r
Datasheet

Specifications of MAX6368LKA46-T

Number Of Voltages Monitored
1
Monitored Voltage
2.5 V, 3 V, 3.3 V, 5 V
Undervoltage Threshold
Adjustable
Overvoltage Threshold
Adjustable
Output Type
Active Low, Push-Pull
Manual Reset
Not Resettable
Watchdog
No Watchdog
Battery Backup Switching
Backup
Power-up Reset Delay (typ)
280 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23
Chip Enable Signals
Yes
Maximum Power Dissipation
700 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
15 uA
Supply Voltage - Min
0 V
The MAX6365–MAX6368 supervisory circuits simplify
power-supply monitoring, battery-backup control func-
tions, and memory write protection in microprocessor
(µP) systems. The circuits significantly improve the size,
accuracy, and reliability of modern systems with an ultra-
small integrated solution.
These devices perform four basic system functions:
1) Provide a µP reset output during V
2) Internally control V
3) Provide memory write protection through internal
4) Include one of the following options: a manual reset
The MAX6365–MAX6368 operate from V
ages as low as 1.2V. The factory preset reset threshold
voltages range from 2.32V to 4.63V (see the Ordering
Information ). In addition, each part is offered in three
reset output versions: push-pull active low, open-drain
active low, or open-drain active high (see the Selector
Guide ). The MAX6365–MAX6368 are available in minia-
ture 8-pin SOT23 packages.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
19-1658; Rev 5; 10/11
Pin Configurations continued at end of data sheet.
up, power-down, and brownout conditions.
maintain data or low-power operation for CMOS
RAM, CMOS µPs, real-time clocks, and other digital
logic when the main supply fails.
chip-enable gating during supply or processor faults.
input (MAX6365), a watchdog timer function
(MAX6366), a battery-on output (MAX6367), or an
auxiliary user-adjustable reset input (MAX6368).
TOP VIEW
Critical µP/µC Power
Monitoring
Fax Machines
Industrial Control
Computers/Controllers
with Battery Backup and Chip-Enable Gating
RESET, RESET
SOT23, Low-Power µP Supervisory Circuits
CE IN
GND
MR
________________________________________________________________ Maxim Integrated Products
1
2
4
3
CC
General Description
MAX6365
SOT23
to backup-battery switching to
Pin Configurations
Portable/Battery-
Powered Equipment
Set-Top Boxes
POS Equipment
6
8
7
5
Applications
CC
CE OUT
BATT
OUT
V
CC
CC
supply power-
supply volt-
o Low +1.2V Operating Supply Voltage (V
o Precision Monitoring of +5.0V, +3.3V, +3.0V, and
o On-Board Gating of Chip-Enable Signals, 1.5ns
o Debounced Manual Reset Input (MAX6365)
o Watchdog Timer, 1.6s Timeout (MAX6366)
o Battery-On Output Indicator (MAX6367)
o Auxiliary User-Adjustable RESET IN (MAX6368)
o Low 10µA Quiescent Supply Current
o Three Available Output Structures
o RESET/RESET Valid Down to 1.2V Guaranteed
o Power-Supply Transient Immunity
o 150ms min Reset Timeout Period
o Miniature 8-Pin SOT23 Package
* These parts offer a choice of reset threshold voltages. From the
Reset Threshold Ranges table, insert the desired threshold volt-
age code in the blank to complete the part number. SOT parts
come in tape and reel only and must be ordered in 2500-piece
increments. See Device Marking Codes for a complete parts list,
including SOT top marks and standard threshold versions. See
Selector Guide for a listing of device features.
Devices are available in both leaded and lead(Pb)-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
- Denotes a package containing lead(Pb).
T = Tape and reel.
/V Denotes an automotive qualified part.
Typical Operating Circuit appears at end of data sheet.
M A X6 3 6 5 LK A_ _-T
MAX6365PKA_ _-T
MAX6365HKA_ _-T
M A X6 3 6 6 LK A_ _-T
M A X 6 36 6P K A_ _-T
M A X 6 36 6H K A_ _-T
M A X6 3 6 7 LK A_ _-T
M A X 6 36 7P K A_ _-T
M A X 6 36 7P K A_ _/V-T
M A X 6 36 7H K A_ _-T
M A X6 3 6 8 LK A_ _-T
M A X 6 36 8P K A_ _-T
M A X 6 36 8H K A_ _-T
+2.5V Power-Supply Voltages
Propagation Delay
(V
CC
Push-Pull RESET
Open-Drain RESET
Open-Drain RESET
or V
PART*
BATT
)
Ordering Information
-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
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
PIN-PACKAGE
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
Features
CC
or V
BATT
1
)

Related parts for MAX6368LKA46-T

MAX6368LKA46-T Summary of contents

Page 1

... GND SOT23 Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. o Low +1.2V Operating Supply Voltage (V o Precision Monitoring of +5.0V, +3.3V, +3.0V, and +2.5V Power-Supply Voltages o On-Board Gating of Chip-Enable Signals, 1.5ns ...

Page 2

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating ABSOLUTE MAXIMUM RATINGS Terminal Voltages (with respect to GND BATT, OUT.......................................................-0.3V to +6V CC RESET (open drain), RESET (open drain) ................-0.3V to +6V BATT ON, RESET (push-pull), RESET IN, WDI, CE IN, CE OUT ...........................-0. ..............................................................-0. Input Current V Peak ..............................................................................1A ...

Page 3

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating ELECTRICAL CHARACTERISTICS (continued) = +3.0V +2.4V to +5.5V BATT unless otherwise noted.) (Note 1) PARAMETER SYMBOL Reset Active Timeout Period RESET Output Voltage RESET Output Voltage Outp ut Leakag ent ...

Page 4

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating ELECTRICAL CHARACTERISTICS (continued) = +3.0V +2.4V to +5.5V BATT unless otherwise noted.) (Note 1) PARAMETER SYMBOL RESET IN (MAX6368 only) RESET IN Threshold V RTH RESET IN Leakage Current RESET IN to Reset Delay CHIP-ENABLE GATING CE IN Leakage Current ...

Page 5

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating (T = +25°C, unless otherwise noted OUT ON-RESISTANCE CC vs. TEMPERATURE 1 2.3V 1 25mA OUT 1.0 0 65mA OUT 0 4. 150mA 0.2 OUT 0 -40 - TEMPERATURE (°C) RESET THRESHOLD vs. TEMPERATURE 5.0 MAX636_ 4.63V ...

Page 6

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating (T = +25°C, unless otherwise noted.) A MAX6368 RESET IN THRESHOLD vs. TEMPERATURE 1.236 1.235 1.234 -40 - TEMPERATURE (° OUT ON-RESISTANCE vs. TEMPERATURE 3. 5. ...

Page 7

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating PIN NAME Acti ve Reset Outp ut asser conti nuousl y w hen asser ses w hen the inter nal w atchd out ...

Page 8

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 1.235V V CC BATT CE IN 20k MR (MAX6365 ONLY) WDI (MAX6366 ONLY) RESET IN (MAX6368 ONLY) 1.235V Detailed Description The Typical Operating Circuit shows a typical connec- tion for the MAX6365–MAX6368. OUT powers the static random-access memory (SRAM) ...

Page 9

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating OUT goes high and stays high regardless of any sub- sequent transitions during the reset event. When CE OUT is disconnected from CE IN, CE OUT is actively pulled up to OUT. The propagation delay through the chip-enable circuit- ry depends on both the source impedance of the drive and the capacitive loading at CE OUT ...

Page 10

... R2 = 100kΩ, and calculate R1 = 273kΩ. A µP’s reset input starts the µ known state. The MAX6365–MAX6368 µP supervisory circuits assert a reset to prevent code-execution errors during power- up, power-down, and brownout conditions. RESET is guaranteed logic low or logic high, depending on the device chosen (see the Ordering Information ) ...

Page 11

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating Watchdog Software Considerations One way to help the watchdog timer monitor the soft- ware execution more closely is to set and reset the watchdog at different points in the program rather than pulsing the watchdog input periodically. Figure 4 ...

Page 12

... MAX6367HKA26 AACH MAX6367HKA29 AACG MAX6367HKA31 AACF MAX6367HKA44 AACE MAX6367HKA46* AACD MAX6368LKA23 AACO MAX6368LKA26 AACN MAX6368LKA29* AACM MAX6368LKA31 AACL MAX6368LKA44 AACK MAX6368LKA46* AACJ MAX6368PKA23 AACU MAX6368PKA26 AACT MAX6368PKA29* AACS MAX6368PKA31 AACR MAX6368PKA44 AACQ MAX6368PKA46* AACP MAX6368HKA23 AADA MAX6368HKA26 AACZ MAX6368HKA29 AACY MAX6368HKA31 ...

Page 13

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating MANUAL WATCH- PART RESET INPUT MAX6365LKA__ MAX6365PKA__ MAX6365HKA__ MAX6366LKA__ MAX6366PKA__ MAX6366HKA__ MAX6367LKA__ MAX6367PKA__ MAX6367HKA__ MAX6368LKA__ MAX6368PKA__ MAX6368HKA__ TOP VIEW RESET, RESET MAX6366 GND 3 6 WDI 4 5 SOT23 ...

Page 14

... SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating SECONDARY DC VOLTAGE R1 R2 *RESET IN APPLIES TO MAX6368 ONLY. **WDI APPLIES TO MAX6366 ONLY. Chip Information PROCESS: CMOS 14 ______________________________________________________________________________________ +2.4V TO +5.5V CMOS RAM 0.1µ OUT BATT 0.1µF MAX6366 MAX6368 RESET WDI** RESET IN OUT ...

Page 15

... Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 15 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

Related keywords