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MAX6457, MAX6458, MAX6459, MAX6460

High-Voltage, Low-Current Voltage Monitors in SOT Packages

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Active: In Production.

Description

The MAX6457–MAX6460 high supply voltage, low-power voltage monitors operate over a 4V to 28V supply voltage range. Each device includes a precision bandgap reference, one or two low-offset voltage comparators, internal threshold hysteresis, power-good or reset timeout options, and one or two high-voltage open-drain outputs. Two external resistors (three for window detection) set the trip threshold voltages.

The MAX6457 is a single voltage monitor for undervoltage or overvoltage detection. A logic-based clear input either latches the output for overvoltage applications or allows the device to operate in transparent mode. The MAX6458 includes two comparators (one overvoltage and one undervoltage) for window detection and a single output to indicate if the monitored input is within an adjustable voltage window. The MAX6459 includes dual overvoltage/undervoltage comparators with two independent comparator outputs. Use the MAX6459 as a window comparator with separate undervoltage and overvoltage outputs or as two independent, single voltage monitors. The MAX6460 includes a single comparator and an internal reference, and can also accept an external reference. The inverting and noninverting inputs of the comparator are externally accessible to support positive or negative voltage monitors and to configure the device for active-high or active-low output logic.

The MAX6457/MAX6458 offer fixed timing options as a voltage detector with a 50µs typical delay or as a reset circuit with a 90ms minimum reset timeout delay. The monitored input must be above the adjusted trip threshold (or within the adjusted voltage window for the MAX6458) for the selected timeout period before the output changes state. The MAX6459/MAX6460 offer only a fixed 50µs timeout period. Internal threshold hysteresis options (0.5%, 5%, and 8.3% for the MAX6457/MAX6458/MAX6459, and 0.5% for the MAX6460) reduce output chatter in noise-sensitive applications. Each device is available in a small SOT23 package and specified over the extended temperature range of -40°C to +125°C.

Data Sheet

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Key Features

  • Wide Supply Voltage Range, 4V to 28V
  • Internal 2.25V ±2.5% Reference
  • Low Current (3.5µA, typ at 12V)
  • Open-Drain n-Channel Output (28V Compliant)
  • Internal Threshold Hysteresis Options (0.5%, 5%, 8.3%)
  • Two IN-to-OUT Timeout Period Options (50µs, 150ms)
  • Internal Undervoltage Lockout
  • Immune to Short Voltage Transients
  • Small SOT23 Packages
  • Few External Components
  • Fully Specified from -40°C to +125°C
 

Applications/Uses

  • Automotive
  • Industrial
  • Multicell Battery-Stack Powered Equipment
  • Networking
  • Notebooks, eBooks
  • Overvoltage Monitoring/Protection
  • Telecom
  • Undervoltage Monitoring/Shutdown
  • Window Voltage Detection Circuitry
   

Key Specifications:

Supervisors (1 Monitored Voltage)
Part Number Reset Thresh.
(V)
Reset Out tRESET Watchdog Feature Supervisor Features ICC
(µA)
Budgetary
Price
min max See Notes
MAX6457 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Active Low
Open Drain
85ms to 300ms
<1ms
No Watchdog
High Voltage (>6V)
Latched Output
12.5 $1.59 @1k
MAX6458 
Active Low
Open Drain
85ms to 300ms
<1ms
High Voltage (>6V)
Latched Output
Overvoltage/Window Monitor
$1.54 @1k
MAX6460 
Active High
Open Drain
<1ms
High Voltage (>6V)
Overvoltage/Window Monitor
$2.25 @1k
See All Supervisors (1 Monitored Voltage) (275)

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.


Supervisors (2 Monitored Voltages)
Part Number Interface Reset Thresh.
(V)
Reset Out tRESET Watchdog Feature Supervisor Features ICC
(µA)
Budgetary
Price
min max See Notes
MAX6459  R/C Adjustable
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
>=5.5
Active Low
Open Drain
<1ms No Watchdog
Adjustable Reset Input
High Voltage (>6V)
Overvoltage/Window Monitor
12.5 $1.77 @1k
See All Supervisors (2 Monitored Voltages) (84)

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.



Diagram

MAX6457, MAX6458, MAX6459, MAX6460: Typical Operating Circuit
Typical Operating Circuit

More Information

Topmark Coding MAX6457
Topmark Coding MAX6458
Topmark Coding MAX6459
Topmark Coding MAX6460
New Product Press Release   2002-09-03 ]

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Document Ref.: 19-2534 Rev 6; 2012-12-21
This page last modified: 2013-12-16