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, V_IT−, 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

Part#	# of Monitored Voltages	Reset Threshold (V)	Min Reset Timeout (ms)	Reset Output-Stage	Manual Reset Capability	Typ Watchdog Timeout (ms)	Package	Product Description	Price* (1000-4999)
ADM1184	4	Adjustable	-	Active-High/Open-Drain	No	n/a	SOP	0.8% Accurate Quad Voltage Monitor	$2.39
ADM13305	2	0.6, 1.68, 2.25, 2.93, 4.55, Adjustable	140	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	1.6	SOIC	Multi-Voltage Supervisory Circuit	$0.95
ADM13307	3	0.6, 1.25, 1.68, 2.25, 2.93, 4.55, Adjustable	140	Active-High/Push-Pull, Active-Low/Push-Pull	Yes	---	SOIC	Multi-Voltage Supervisory Circuit	$0.98
ADM6710	4	1.58, 1.67, 2.19, 2.32, 2.63, 2.78, 2.93, 3.08, 4.38, 4.63, Adjustable	140	Active-Low/Open-Drain	No	---	SOT	Low Voltage, High Accuracy, Triple/Quad Voltage uP Supervisory Circuit	$1.60
ADM9264	4	12.0, 2.8, 3.3, 5.0	n/a	Active-Low/Open-Drain	No	---	SOIC	Quad Power Supply Monitor for Desktop PCs	$1.20

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

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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