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Analog Devices Inc. ADM6316DZ26ARJ-RL7
- Part No.:
- ADM6316DZ26ARJ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6316DZ26ARJ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
ADM6316DZ26ARJ-RL7 from Analog Devices is a supervisory circuit with integrated watchdog timer and manual reset input in a 5-lead SOT-23 package. It monitors VCC for undervoltage conditions (reset threshold = 2.63 V), provides 1120 ms minimum reset timeout, 25.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +85°C. It ensures reliable microprocessor reset during power-up, brownout, or code lockup in portable embedded systems.
For engineers reviewing the ADM6316DZ26ARJ-RL7 datasheet, ADM6316DZ26ARJ-RL7 pinout, ADM6316DZ26ARJ-RL7 application, or ADM6316DZ26ARJ-RL7 equivalent, key selection criteria include confirmed 2.63 V reset threshold tolerance (±2.5% over temperature), guaranteed RESET validity down to VCC = 1 V, 5 µA typical supply current at 3.6 V, glitch-immune MR input with 52 kΩ internal pull-up, and compatibility with 5-lead SOT-23 PCB footprints.
Technical Context
The ADM6316DZ26ARJ-RL7 implements a precision bandgap-based voltage reference for reset threshold detection with 40 ppm/°C temperature coefficient and 3 mV hysteresis. Its watchdog timer clears on any WDI logic transition (≥50 ns pulse width) and times out after 25.6 sec (typical), requiring periodic firmware strobing to prevent unintended reset.
Reset assertion occurs when VCC falls below 2.63 V, when MR is pulled low ≥1 µs, or when WDI remains static beyond watchdog timeout. The push-pull active-low RESET output drives low to ≤0.3 V (at ISINK = 1.2 mA, VCC ≥ 2.7 V) and high to ≥0.8 × VCC (at ISOURCE = 500 µA, VCC ≥ 2.7 V), ensuring valid logic levels down to VCC = 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±2.5% over −40°C to +85°C - sets precise undervoltage detection point for 2.7 V–3.3 V rail monitoring |
| Reset Timeout | 1120 ms minimum - guarantees sufficient hold time for microprocessor initialization after power stabilization |
| Watchdog Timeout | 25.6 sec typical - enables long-duration system activity monitoring without excessive firmware overhead |
| Supply Current | 5 µA typical at 3.6 V - supports battery-powered operation with minimal quiescent drain |
| RESET Output Type | Push-pull active low - eliminates need for external pull-up resistor and ensures fast, rail-to-rail logic transitions |
| MR Input | Active low with 52 kΩ internal pull-up - allows direct connection to momentary switch without external biasing |
| VCC Operating Range | 1 V to 5.5 V - enables operation during deep brownout and compatibility with wide-input systems |
Pinout & Package
ADM6316DZ26ARJ-RL7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.80–3.00 mm body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low during VCC undervoltage, MR activation, or watchdog timeout; valid down to VCC = 1 V |
| 2 - GND | Ground reference | Common return path for internal reference, reset driver, and input comparators |
| 3 - MR | Manual reset input | Active-low input with 52 kΩ internal pull-up; ≥1 µs low pulse triggers reset with 230 ns delay at VCC = 5 V |
| 4 - WDI | Watchdog input | Edge-sensitive input; any transition resets watchdog timer; floating disables watchdog function |
| 5 - VCC | Supply voltage input | Monitored rail; powers internal circuitry and defines logic thresholds; operates from 1 V to 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| 26 selectable reset thresholds (2.5 V–5.0 V) | Enables precise matching to diverse microprocessor core/logic supply rails without external resistive dividers |
| Four reset timeout options (1 ms–1120 ms) | Allows optimization of reset pulse width to match specific processor boot timing requirements |
| Four watchdog timeout options (6.3 ms–25.6 sec) | Supports both fast-response safety-critical applications and low-power long-interval supervision |
| Guaranteed RESET validity to VCC = 1 V | Ensures deterministic reset behavior during severe brownout, preventing undefined MCU states |
| Power supply glitch immunity | Rejects transients ≤100 ns duration, reducing false resets in noisy industrial or automotive environments |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 3.3 V main supply in a DIN-rail mounted programmable logic controller exposed to 24 V field wiring noise. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and watchdog supervision of ARM Cortex-M7 firmware execution. Use Value: Prevents spurious restarts from EMI-induced VCC glitches using 100 ns MR/WDI noise rejection and ensures safe recovery after extended undervoltage events via 1120 ms reset hold. |
Use Scenario: Embedded in a handheld ECG device powered by a single Li-ion cell (2.8 V–4.2 V range). IC Role / Device Role / Timing Role: Resets the ultra-low-power microcontroller upon battery voltage sag below 2.63 V and detects firmware hangs via 25.6 sec watchdog interval. Use Value: Extends battery life with 5 µA typical quiescent current while maintaining fail-safe operation through guaranteed RESET validity down to VCC = 1 V during deep discharge. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Secures startup and runtime integrity of a dual-core metering SoC operating from a 3.3 V LDO fed by 12 V vehicle battery. IC Role / Device Role / Timing Role: Provides synchronized power-on reset and continuous watchdog supervision of metrology firmware loops. Use Value: Eliminates need for external RC reset circuits; 2.63 V threshold aligns with SoC minimum operating voltage, and 1120 ms timeout accommodates slow LDO ramp-up. |
Use Scenario: Integrated into a CAN-connected door module subjected to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises 5 V system rail and asserts reset if microcontroller fails to toggle WDI due to electromagnetic interference or software fault. Use Value: Maintains functional safety compliance with 25.6 sec watchdog window-long enough to avoid nuisance resets during transient faults but short enough to recover within ASIL-B timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6361LTT+T | 2.63 V reset threshold, 1100 ms reset timeout, no watchdog timer, open-drain RESET output | Lacks watchdog supervision; requires external pull-up; suitable only where firmware-level hang detection is handled externally | Select when watchdog functionality is unnecessary and board space permits pull-up resistor placement |
| TPS3808G33DBVR | 3.3 V fixed reset threshold, 200 ms reset timeout, 2.5 sec watchdog timeout, push-pull RESET | Higher reset threshold and shorter watchdog period limit use to 3.3 V systems requiring faster fault response | Prefer for cost-sensitive 3.3 V-only designs where 25.6 sec watchdog interval is excessive |
Compared with MAX6361LTT+T and TPS3808G33DBVR, the ADM6316DZ26ARJ-RL7 uniquely combines 2.63 V precision threshold, 1120 ms reset hold, and 25.6 sec watchdog timeout in a single 5-lead SOT-23 package-enabling robust supervision of wide-input, low-voltage microcontrollers without design compromises.
Availability
ADM6316DZ26ARJ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for ADM6316DZ26ARJ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM6316 family was designed specifically for microprocessor system supervision-delivering precision voltage monitoring, configurable reset timing, and robust watchdog protection in ultra-small packages for space-constrained embedded applications.
FAQ
What is the exact reset threshold voltage of the ADM6316DZ26ARJ-RL7 and how does it vary with temperature?
The ADM6316DZ26ARJ-RL7 has a nominal reset threshold of 2.63 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is specified at 40 ppm/°C, resulting in a maximum deviation of approximately ±10.5 mV across the operating range. This precision enables reliable undervoltage detection for 2.7 V and 3.3 V microprocessor rails without external calibration.
Does the ADM6316DZ26ARJ-RL7 require an external pull-up resistor on the RESET pin?
No, the ADM6316DZ26ARJ-RL7 features a push-pull active-low RESET output, eliminating the need for an external pull-up resistor. The output actively drives low (≤0.3 V at 1.2 mA sink) and high (≥0.8 × VCC at 500 µA source), ensuring clean, rail-to-rail logic transitions. This simplifies PCB layout and reduces BOM count compared to open-drain alternatives like the ADM6320 series.
How is the watchdog timeout configured on the ADM6316DZ26ARJ-RL7?
The watchdog timeout is factory-configured and encoded in the part number suffix: "Z" denotes 25.6 sec typical timeout. It cannot be adjusted externally-the timer resets on every WDI logic transition (≥50 ns pulse width) and asserts RESET if no transition occurs within that fixed interval. Leaving WDI floating disables the watchdog entirely, allowing use as a basic supervisor-only device.
Can the ADM6316DZ26ARJ-RL7 operate reliably during deep brownout conditions?
Yes, the ADM6316DZ26ARJ-RL7 guarantees valid RESET output behavior down to VCC = 1 V, and its internal circuitry remains functional across the full 1 V to 5.5 V supply range. This ensures deterministic reset assertion even during severe brownout events where other supervisors may lose output drive capability or reference stability-critical for fail-safe recovery in battery-powered systems.
What is the function of the MR pin on the ADM6316DZ26ARJ-RL7 and how should it be interfaced?
The MR pin on the ADM6316DZ26ARJ-RL7 is an active-low manual reset input with a built-in 52 kΩ internal pull-up resistor. It requires a ≥1 µs low pulse to trigger reset, and exhibits 230 ns propagation delay at VCC = 5 V. For push-button use, connect one side to MR and the other to GND; no external pull-up is needed. Debounce and 100 ns glitch rejection are implemented internally, minimizing firmware handling overhead.
ADM6316DZ26ARJ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM6316DZ26ARJ-RL7 FAQ
1.How can I place an order for ADM6316DZ26ARJ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6316DZ26ARJ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM6316DZ26ARJ-RL7 reliable?
The price and inventory of ADM6316DZ26ARJ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6316DZ26ARJ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM6316DZ26ARJ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6316DZ26ARJ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6316DZ26ARJ-RL7?
ADM6316DZ26ARJ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6316DZ26ARJ-RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM6316DZ26ARJ-RL7?
For technical support, including ADM6316DZ26ARJ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6316DZ26ARJ-RL7 requirements.
6.How does Aetrix verify that ADM6316DZ26ARJ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6316DZ26ARJ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM6316DZ26ARJ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6316DZ26ARJ-RL7?
All ADM6316DZ26ARJ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6316DZ26ARJ-RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM6316DZ26ARJ-RL7 part is unused and in its original packaging.
Return procedure for ADM6316DZ26ARJ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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