ADM6306D331ARJZ Analog Devices Integrated Circuit (Other) In Stock
Analog Devices ADM6306D331ARJZ is a multiple-input programmable supervisory IC monitoring up to 4 supply rails with a 3.31 V primary reset threshold and programmable timeout. It provides open-drain reset output, watchdog timer, and manual reset input in a compact WLCSP package. Available in stock worldwide with fast shipping.
- Manufacturer
- Analog Devices
- Package
- Other
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Monitors up to 4 independent supply voltage rails simultaneously with factory-trimmed 3.31 V primary reset threshold, replacing discrete comparator reset circuits in multi-rail processor systems
- Integrated programmable watchdog timer detects firmware hangs and asserts reset after a configurable timeout period, improving system reliability in unattended embedded applications
- Open-drain reset output with manual reset input and power-on reset delay of up to 200 ms in a WLCSP package, minimizing board area in space-constrained designs
Applications
The ADM6306D331ARJZ is used in multi-rail processor boards, FPGA power sequencing circuits, and embedded system supervisors where multiple supply voltages must all be within specification before the processor reset is released. Its programmable watchdog timeout ensures automatic system recovery from software lockup in industrial controllers, network equipment, and medical devices that operate unattended. The compact WLCSP package makes it suitable for smartphone power management boards, IoT edge nodes, and portable instruments where supervisory circuitry must occupy minimal PCB area.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many supply rails can ADM6306D331ARJZ monitor simultaneously and what is its primary reset threshold voltage?
The ADM6306D331ARJZ monitors up to 4 independent supply voltage rails simultaneously. The primary reset threshold is factory-trimmed to 3.31 V with tight accuracy, typically within 1% to 2% over the -40°C to 125°C temperature range. Reset is asserted if any monitored rail falls below its threshold, preventing processor operation during inadequate supply conditions.
What is the watchdog timeout function in ADM6306D331ARJZ and how does it improve system reliability in unattended equipment?
The integrated watchdog timer requires periodic toggling of the watchdog input pin by the host firmware within a programmable timeout window. If the firmware fails to service the watchdog — due to a software hang, memory corruption, or infinite loop — the watchdog expires and asserts the reset output, restarting the processor. In industrial control panels or network routers operating unattended for months, this prevents permanent lockup without requiring physical intervention.
When would a designer choose ADM6306D331ARJZ over a simple single-rail supervisor such as MAX809 in a multi-processor design?
A single-rail supervisor monitors only one supply, requiring 4 discrete devices to cover 4 rails, consuming 4 separate PCB footprints and 4 component line items. The ADM6306D331ARJZ replaces all 4 with a single WLCSP, saving board area of at least 15 mm² and simplifying reset logic to a single open-drain output. Designs with 3.3 V, 1.8 V, 1.2 V, and 5 V rails — common in FPGA or multi-core SoC systems — directly benefit from this integration.
What package does ADM6306D331ARJZ use and what reset output type does it provide for interfacing to microcontrollers?
The ADM6306D331ARJZ is housed in a WLCSP (wafer-level chip-scale package), one of the smallest available IC packages, with a footprint typically under 2 mm x 2 mm. The reset output is open-drain, allowing connection to 1.8 V, 3.3 V, or 5 V logic rails using an external pull-up resistor. This configuration supports wire-OR reset networks where multiple supervisors assert a shared reset bus simultaneously.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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