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ADM13305:  Dual Processor Supervisors with Watchdog

Product Details


The ADM13305 is a dual voltage supervisor designed to monitor two supplies and provide a reset signal to DSP and microprocessor-based systems.

There are five models available, all of which feature a combination of internally pretrimmed undervoltage threshold options for monitoring 1.8 V, 2.5 V, 3.3 V, and 5 V supplies. There is also an adjustable input option with an undervoltage threshold voltage of 0.6 V.

The ADM13305-18, ADM13305-25, and ADM13305-33 models have two internally fixed thresholds. The ADM13305-4 and ADM13305-5 offer one internally fixed threshold and one externally programmable threshold via a resistor string. See the Ordering Guide for a list of all available options.

During power-up, RESETis asserted when the supply voltage exceeds 1.1 V. The device then monitors the SENSEv input pins and holds the RESET output low as long as either of the SENSEv inputs remains below the rising threshold voltage, VIT+.

Once the supplies monitored at the SENSEv inputs rise above their associated thresholds, the reset signal remains low for the reset timeout period before deasserting. Subsequently, if a voltage monitored by the SENSEv pins falls below its associated falling threshold, VIT−, RESETthe output asserts. The ADM13305 features both an active high RESET and an active low RESET output.

As well as providing power-on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within the preset timeout period. A reset signal can also be asserted by an external push button through the manual reset input pin.

The ADM13305 is available in an 8-lead, narrow body SOIC package. The device operates over the extended industrial temperature range of −40°C to +85°C.

Applications

  • Supervising DSPs/microcontrollers
  • Industrial and portable equipment
  • Wireless systems
  • Notebook/desktop computers

FEATURES and BENEFITS

  • Dual supervisory circuits
  • Supply voltage range of 2.7 V to 5.5 V
  • Pretrimmed threshold options: 1.8 V, 2.5 V, 3.3 V, and 5 V
  • Adjustable 0.6 V voltage reference
  • Maximum supply current of 40 μA
  • 140 ms (minimum) reset timeout
  • Watchdog timer with 1.6 sec (typical) timeout
  • RESET valid from VDD ≥ 1.1 V
  • Push-pull RESET and outputs RESET
  • 8-lead, narrow body SOIC package
  • Temperature range: −40°C to +85°C

Typical Application Circuit

Design Tools,Models,Drivers & Software

Title Content Type File Type
Supervisor Parametric Search
Narrow down the thousands of available supervisors using parameters applicable to your application.
ADIsim Design/Simulation Tools HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

ADM13305 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM13305-18ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.27 $0.96 Y  Material Info PCN Purchase Sample
ADM13305-18ARZ-RL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.96 Y  Material Info PCN Purchase
ADM13305-25ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.27 $0.96 Y  Material Info PCN Purchase Sample
ADM13305-25ARZ-RL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.96 Y  Material Info PCN Purchase
ADM13305-33ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.27 $0.96 Y  Material Info PCN Purchase Sample
ADM13305-33ARZ-RL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.96 Y  Material Info PCN Purchase
ADM13305-4ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.27 $0.96 Y  Material Info PCN Purchase Sample
ADM13305-4ARZRL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.96 Y  Material Info PCN Purchase
ADM13305-5ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.27 $0.96 Y  Material Info PCN Purchase Sample
ADM13305-5ARZRL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $0.96 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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