MAX6324GUT46-T Maxim Integrated, MAX6324GUT46-T Datasheet

no-image

MAX6324GUT46-T

Manufacturer Part Number
MAX6324GUT46-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6323, MAX6324r
Datasheet

Specifications of MAX6324GUT46-T

Number Of Voltages Monitored
1
Monitored Voltage
2.5 V, 3 V, 3.3 V, 5 V
Undervoltage Threshold
4.5 V
Overvoltage Threshold
4.75 V
Output Type
Active Low, Open Drain
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
280 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Package / Case
SOT-23
Chip Enable Signals
No
Maximum Power Dissipation
696 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
27 uA
Supply Voltage - Min
1.2 V
The MAX6323/MAX6324 microprocessor (µP) supervi-
sory circuits monitor power supplies and µP activity in
digital systems. A watchdog timer looks for activity out-
side an expected window of operation. Six laser-
trimmed reset thresholds are available with ±2.5%
accuracy from +2.32V to +4.63V. Valid RESET output is
guaranteed down to V
The RESET output is either push-pull (MAX6323) or
open-drain (MAX6324). RESET is asserted low when
V
reset input (MR) is asserted low. RESET remains assert-
ed for at least 100ms after V
threshold and MR is deasserted.
The watchdog pulse output (WDPO) utilizes an open-
drain configuration. It can be triggered either by a fast
timeout fault (watchdog input pulses are too close to
each other) or a slow timeout fault (no watchdog input
pulse is observed within the timeout period). The
watchdog timeout is measured from the last falling
edge of watchdog input (WDI) with a minimum pulse
width of 300ns. WDPO is asserted for 1ms when a fault
is observed. Eight laser-trimmed timeout periods are
available.
The MAX6323/MAX6324 are offered in a 6-pin SOT23
package and operate over the extended temperature
range (-40°C to +125°C).
19-1838; Rev 6; 1/11
Typical Operating Circuit appears at end of data sheet.
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.
CC
TOP VIEW
falls below the reset threshold, or when the manual
Automotive
Industrial
Medical
Embedded Control Systems
GND
WDI
MR
________________________________________________________________ Maxim Integrated Products
1
2
3
µP Supervisory Circuits with Windowed
CC
(Min/Max) Watchdog and Manual Reset
General Description
MAX6323
MAX6324
SOT23
= +1.2V.
Pin Configuration
CC
rises above the reset
6
5
4
Applications
RESET
WDPO
V
CC
o Min/Max (Windowed) Watchdog,
o Pulsed Open-Drain, Active-Low Watchdog Output
o Power-On Reset
o Precision Monitoring of +2.5V, +3.0V, +3.3V,
o Open-Drain or Push-Pull RESET Outputs
o Low-Power Operation (23µA typ)
o Debounced Manual Reset Input
o Guaranteed Reset Valid to V
*These devices are factory trimmed to one of eight watchdog-
timeout windows and one of six reset voltage thresholds. Insert
the letter corresponding to the desired watchdog-timeout window
(A, B, C, D, E, F, G, or H) into the blank following the number
6323 or 6324 (see Watchdog Timeout table). Insert the two-digit
code (46, 44, 31, 29, 26, or 23) after the letters UT for the desired
nominal reset threshold (see Reset Threshold Range table at end
of data sheet).
/V denotes an automotive qualified part.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Note: There are eight standard versions of each device available
(see Standard Versions table). Sample stock is generally held on
standard versions only. Standard versions have an order incre-
ment requirement of 2500 pieces. Nonstandard versions have an
order increment requirement of 10,000 pieces. Contact factory for
availability of nonstandard versions.
Ordering Information continued at end of data sheet.
* See Figure 1 for operation.
MAX6323_UT_ _-T
SUFFIX
8 Factory-Trimmed Timing Options
and +5.0V Power Supplies
C
D
G
H
A
B
E
F
PART
MAX
719
1.5
15
15
15
15
23
39
WATCHDOG TIMEOUT*
FAST
-40°C to +125°C
Ordering Information
RANGE
TEMP
UNITS
Watchdog Timeout
ms
ms
ms
ms
ms
ms
ms
ms
CC
= +1.2V
PIN-
PACKAGE
6 SOT23
MIN
100
300
1.3
10
10
60
47
82
Features
SLOW
Push-Pull
UNITS
OUTPUT
RESET
ms
ms
s
s
1

Related parts for MAX6324GUT46-T

MAX6324GUT46-T Summary of contents

Page 1

... WDI 3 4 SOT23 Typical Operating Circuit appears 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 Min/Max (Windowed) Watchdog, 8 Factory-Trimmed Timing Options o Pulsed Open-Drain, Active-Low Watchdog Output o Power-On Reset o Precision Monitoring of +2 ...

Page 2

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) V ..................................................................-0.3V to +6.0V CC MR, RESET (MAX6323), WDI................-0. WDPO, RESET (MAX6324) ..............................-0.3V to +6.0V , WDI, MR ..............................................20mA Input Current Output Current, RESET, WDPO ..........................................20mA Rate of Rise, V ............................................................100V/µs ...

Page 3

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset ELECTRICAL CHARACTERISTICS (continued full range -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL WATCHDOG INPUT AND OUTPUT Watchdog Timeout (Fast) t WD1 (Notes 2, 3) Watchdog Timeout (Slow) ...

Page 4

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset (V = full range +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE -40 - TEMPERATURE (°C) NORMALIZED RESET THRESHOLD vs. TEMPERATURE 1.0005 1.0000 0.9995 ...

Page 5

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset (V = full range +25°C, unless otherwise noted FAST WATCHDOG TIMEOUT PERIOD WDI WDPO PIN NAME Active-Low, Manual Reset Input. When MR is asserted low, RESET is asserted low, the internal watchdog MR timer is reset to zero, and WDPO is reset to high impedance (open drain). After the rising edge of MR, 1 RESET is asserted for at least 100ms ...

Page 6

... CONDITION 3 * UNDETERMINED STATES MAY OR MAY NOT GENERATE A FAULT CONDITION. Figure 1. Detailed Watchdog Input Timing Relationship Detailed Description The MAX6323/MAX6324 µP supervisory circuits main- tain system integrity by alerting the µP to fault condi- tions. In addition to a standard V power-on reset, brownout detect, and power-down ...

Page 7

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset RESET WDI WDPO Figure 2. Fast Fault Timing RESET WDI WDPO Figure 3. Slow Fault Timing RESET WDI H WDPO L Figure 4. Normal Operation, WDPO Not Asserted _______________________________________________________________________________________ t < t (min) WDI WD1 FAST FAULT t < t ...

Page 8

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset V CC 100ms (min) RESET MR Figure 5. RESET Timing Relationship falls below the preset threshold or when the manual reset input (MR) is asserted. The RESET output remains asserted for at least 100ms after V the reset threshold and MR is deasserted (Figure 5). ...

Page 9

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset MAX6323 RESET GND Figure 6. RESET Valid Ground Circuit CC Interfacing to µPs with Bidirectional Reset Pins Since the RESET output on the MAX6324 is open-drain, this device easily interfaces with µPs that have bidirec- tional reset pins, such as the Motorola 68HC11. Connecting the µ ...

Page 10

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset START SET WDI LOW SUBROUTINE OR PROGRAM LOOP SET WDI HIGH RETURN END Figure 9. Watchdog Flow Diagram V CC 500pF *MAX6324 ONLY Figure 10. WDPO to MR Loopback Circuit 10 ______________________________________________________________________________________ An error detected by the watchdog often indicates that a problem has occurred in the µ ...

Page 11

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset Standard Versions MAX6323AUT29 MAX6323AUT46 MAX6323CUT29 MAX6323CUT46 MAX6323DUT29 MAX6323DUT46 MAX6323HUT29 MAX6323HUT46 Ordering Information (continued) TEMP PART RANGE MAX6324_UT_ _-T -40°C to +125°C MAX6324_UT_ _/V-T -40°C to +125° 6324_U T_ _ -40°C to +125°C *These devices are factory trimmed to one of eight watchdog- timeout windows and one of six reset voltage thresholds ...

Page 12

... Supervisory Circuits with Windowed (Min/Max) Watchdog and Manual Reset V CC 500pF *MAX6324 ONLY For the latest package outline information and land patterns www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

Related keywords