DS1834AS+T&R by Analog Devices

Dual EconoReset with Pushbutton

Status: Active
Series: DS1834, DS1834A, DS1834D
RoHS: Unknown
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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.

Prices starting from US$0.47


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Logo for element14 element14 US$1.83
103
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Logo for Newark Electronics Newark Electronics US$0.47
5
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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
5V with 5% or 10% tolerance
3.3V with 10% or 20% tolerance
-40°C to +85°C

Specifications

Reset Thresh. (V) 2.5 to 3.33.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active LowOpen Drain
Interface Factory Fixed
tRESET (min) 85ms to 300ms
Watchdog Feature No Watchdog
Supervisor Features Manual ResetPower Fail Comparator/Low Battery Detect
ICC (µA) (max) 50
Package/Pins SOIC (N)/8UMAX/8
BudgetaryPrice (See Notes) 1.54


DS1834AS+T&R Power Management ICs - PMIC by Analog Devices

MPU SUPERVISOR DUAL 5.5V NSOIC-8

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The DS1834 Dual EconoResets monitors three vital system conditions: 5-volt supply, 3.3-volt supply, and an external override. First a precision temperature reference and comparator circuit monitor the status of the 5-volt supply and the 3.3-volt supply. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces the reset of the affected supply to an active state. Lastly, the DS1834 supports an external reset via an internally debounced pushbutton input. When the pushbutton is pulled low both resets will be asserted for approximately 350 ms after the pushbutton is released.

Specifications

Threshold Voltage 4.63V
No. of Supervisors / Monitors 2Monitors
Supply Voltage Min 1.2V
Supply Voltage Max 5.5V
Reset Type Active-Low Open-Drain
Digital IC Case NSOIC
No. of Pins 8Pins
Delay Time 350ms
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

MPU SUPERVISOR, DUAL, 5.5V, NSOIC-8 | element14
Mpu Supervisor, Dual, 5.5V, Nsoic-8 | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DS1834AS+T&R ?

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Is the DS1834AS+T&R RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS1834AS+T&R have stock available?

Authorised distributors including element14, Farnell and Newark Electronics have stock available or on a lead time for DS1834AS+T&R .

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