MAX6426

Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay


Please check latest availability status for a specific part variant.

Description

The MAX6340/MAX6421–MAX6426 low-power microprocessor supervisor circuits monitor system voltages from 1.6V to 5V. These devices perform a single function: they assert a reset signal whenever the VCC supply voltage falls below its reset threshold. The reset output remains asserted for the reset timeout period after VCC rises above the reset threshold. The reset timeout is externally set by a capacitor to provide more flexibility.

The MAX6421/MAX6424 have an active-low, push-pull reset output. The MAX6422 has an active-high, push-pull reset output and the MAX6340/MAX6423/MAX6425/MAX6426 have an active-low, open-drain reset output. The MAX6421/MAX6422/MAX6423 are offered in 4-pin SC70 or SOT143 packages. The MAX6340/MAX6424/MAX6425/MAX6426 are available in 5-pin SOT23-5 packages.
MAX6340, MAX6421, MAX6422, MAX6423, MAX6424, MAX6425, MAX6426: Typical Operating Circuit MAX6340, MAX6421, MAX6422, MAX6423, MAX6424, MAX6425, MAX6426: Typical Operating Circuit Enlarge+

Key Features

  • Monitor System Voltages from 1.6V to 5V
  • Capacitor-Adjustable Reset Timeout Period
  • Low Quiescent Current (1.6µA typ)
  • Three RESET Output Options
    • Push-Pull Active-Low RESET
    • Push-Pull RESET
    • Open-Drain Active-Low RESET
  • Guaranteed Reset Valid to VCC = 1V
  • Immune to Short VCC Transients
  • Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23 Packages
  • MAX6340 Pin Compatible with LP3470
  • MAX6424/MAX6425 Pin Compatible with NCP300–NCP303, MC33464/MC33465, S807/S808/S809, and RN5VD
  • MAX6426 Pin Compatible with PST92XX
  • AEC-Q100 Qualified (MAX6340UK31/V+T)

Applications/Uses

  • Automotive
  • Battery-Powered Computers/Controllers
  • Computers
  • Critical µP Monitoring
  • Embedded Controllers
  • Intelligent Instruments
  • Medical Equipment
  • Portable Equipment
  • Set-Top Boxes
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6340 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
<1ms
>1s
Adjustable
No Watchdog1.52.5
SOT23/5
$1.30 @1k
MAX6421 
Active Low
Push-Pull
SC70/4
SOT23/4
$1.30 @1k
MAX6422 
Active High
Push-Pull
SC70/4
SOT23/4
$1.30 @1k
MAX6423 
Active Low
Open Drain
SC70/4
SOT23/4
$1.30 @1k
MAX6424 
Active Low
Push-Pull
SOT23/5
$1.30 @1k
MAX6425 
Active Low
Open Drain
SOT23/5
$1.30 @1k
MAX6426 
Active Low
Open Drain
SOT23/5
-
See All Supervisors (1 Monitored Voltage) (261)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

Related Resources


MAX16136
High-Precision Supervisory with Window Watchdog and Overvoltage Indicator

  • ±1% Accuracy
  • Enables ASIL Compliance at System Level
  • 0.5V to 5V Threshold Range with 20mV Increments

MAX16160
High-Accuracy 4-Channel, Any-Input Supervisory Circuits

  • Valid Active-Low RESET Logic State for Any Input Above 1V
  • ±1% Accuracy for All Inputs
  • Low 17μA Supply Current

MAX16154
nanoPower Supervisor and Watchdog Timer

  • 400nA (typ) Supply Current
  • 1.2V to 5.5V Operating Supply Range
  • Monitors Supply Voltage and Provides System Reset Signal

MAX16153
nanoPower Supervisor and Watchdog Timer

  • 400nA (typ) Supply Current
  • 1.2V to 5.5V Operating Supply Range
  • Monitors Supply Voltage and Provides System Reset Signal

MAX16155
nanoPower Supervisor and Watchdog Timer

  • 400nA (typ) Supply Current
  • 1.2V to 5.5V Operating Supply Range
  • Monitors Supply Voltage and Provides System Reset Signal

MAX16152
nanoPower Supervisor and Watchdog Timer

  • 400nA (typ) Supply Current
  • 1.2V to 5.5V Operating Supply Range
  • Monitors Supply Voltage and Provides System Reset Signal

MAX20480
Automotive ASIL-D 7-Channel Power-System Monitor

  • Small Solution
  • High Precision
  • Highly Integrated