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ADM13305:  Dual Processor Supervisors with Watchdog

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 ...More

ADM13305:  Dual Processor Supervisors with Watchdog

Product Description

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

    • Data Sheet, Rev. 0, 8/07

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    • 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
    • Batt-Backup-Flg: No
    • Manual Reset Capability: Yes
    • Package: SOIC
    • Reset Threshold Summary: 5 Options--0.6Adj to 4.55
    • Reset Output-Stage: Active-High/Push-Pull,Active-Low/Push-Pull
    • Min Reset Timeout (ms): 140
    • Typ Watchdog Timeout (ms): 1.6
    • Watchdog Timer: Yes
    • # of Monitored Voltages: 2

    Functional Block Diagram for ADM13305

    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# # of Monitored Voltages Reset Threshold Summary Min Reset Timeout (ms) Reset Output-Stage Manual Reset Capability Typ Watchdog Timeout (ms) Package Product Description Price* (1000-4999)
    AD5100 4 Programmable Adj Active-Low/Push-Pull Yes adj. SOP System-Mgmt IC with Programmable Quad Voltage Monitoring and Supervisory Functions $2.96
    ADM1184 4 Adjustable 280 Active-High/Open-Drain No --- SOP 0.8% Accurate Quad Voltage Monitor $2.42
    ADM13305 2 5 Options--0.6Adj to 4.55 140 Active-High/Push-Pull, Active-Low/Push-Pull Yes 1.6 SOIC Dual Processor Supervisor with Watchdog $0.96
    ADM13307 3 6 Options--0.6 to 4.55V 140 Active-High/Push-Pull, Active-Low/Push-Pull Yes --- SOIC Triple Processor Supervisors $0.99
    ADM2914 4 Vcc ± 500 mV Adj Active-Low/Open-Drain No adj. SOP Quad UV/OV Positive/Negative Voltage Monitor $3.99
    ADM6339 4 9 Options&Adj (-5 to +5) 200 Active-Low/Int-Pullup No --- SOT Quad Voltage Microprocessor Supervisory Circuit $1.79
    ADM6710 4 6 Options--0.62Adj to 5V 140 Active-Low/Open-Drain No --- SOT Low Voltage, High Accuracy, Triple/Quad Voltage uP Supervisory Circuit $1.62
    ADM9264 4 4 Options--2.6 to 11.04V n/a Active-Low/Open-Drain No --- SOIC Quad Power Supply Monitor for Desktop PCs -
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    *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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.