DS1834A

Dual EconoReset with Pushbutton


Please check latest availability status for a specific part variant.

Description

The DS1834 Dual EconoReset with Pushbutton is designed to monitor power and protect processing in dual-voltage systems. It operates from the higher of a 3-volt or 5-volt input, monitoring both for in-tolerance conditions. When safety thresholds are breached from either input, the DS1834 initiates reset. On power return, it automatically restarts the processor, maintaining reset for 350ms to allow stabilization. The DS1834 also monitors a pushbutton input to allow for external over-ride.

Using pin adjustments, voltage reset tolerances can be set in different combinations for the 5V and 3.V power supplies, respectively: 10% and 10% 10% and 20% and 5% and 10%. DS1834A NMOS outputs can be wire-AND'd to either the 5-volt or 3-volt level. The DS1834 and DS1834D have CMOS outputs for low-current operation.

The DS1834 is targeted for multi-voltage microprocessor systems and subsystems, or for buses that do not operate at the same voltage as the µP or core logic. By integrating monitoring functions required for a particular application, the DS1834 enhances processor reliability with considerable savings in space and cost.
DS1834, DS1834A, DS1834D: Block Diagram DS1834, DS1834A, DS1834D: Block Diagram Enlarge+

Key Features

  • Monitors both 3.3V and 5V power supplies
  • 3.3V and 5V power-on and power transient resets
  • Provides pushbutton switch for manual reset control
  • Active low push-pull outputs (DS1834)
  • Active low open-drain outputs (DS1834A)
  • Active high push-pull outputs (DS1834D)
  • Draws internal power from the higher of the two sources
  • Uses precision temperature-compensated voltage reference and sensor
  • Maintains active high reset for 350ms after power return
  • Internal 5kΩ pull-up resistor
  • Operating ranges:
    • 5V with 5% or 10% tolerance
    • 3.3V with 10% or 20% tolerance
    • -40°C to +85°C
Part NumberInterfaceReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
DS1834 Factory Fixed
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
85ms to 300msNo Watchdog
Manual Reset
Power Fail Comparator/Low Battery Detect
2.550
PDIP/8
SOIC (N)/8
UMAX/8
$1.26 @1k
DS1834A 
Active Low
Open Drain
SOIC(N)/8
DS1834D -
SOIC(N)/8
See All Supervisors (2 Monitored Voltages) (73)
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.

Quality and Environmental Data

Product Reliability Reports: DS1834A.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
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