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Analog Devices Inc. ADM6316DZ31ARJ-RL7
- Part No.:
- ADM6316DZ31ARJ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6316DZ31ARJ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADM6316DZ31ARJ-RL7 from Analog Devices is a supervisory circuit with integrated watchdog timer and manual reset input, designed for microprocessor supply voltage monitoring and code execution integrity assurance. It features a 3.08 V reset threshold, 1120 ms minimum reset timeout, 25.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates over −40°C to +85°C in 5-lead SOT-23. It is used in embedded controllers where brownout recovery and firmware hang detection are critical.
For engineers reviewing the ADM6316DZ31ARJ-RL7 datasheet, ADM6316DZ31ARJ-RL7 pinout, ADM6316DZ31ARJ-RL7 application, or ADM6316DZ31ARJ-RL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), guaranteed RESET validity down to VCC = 1 V, glitch-immune MR input with 52 kΩ internal pull-up, and compatibility with low-power portable systems requiring <20 µA supply current at 5.5 V.
Technical Context
The ADM6316DZ31ARJ-RL7 implements a precision bandgap-based voltage reference for reset threshold generation with 40 ppm/°C temperature coefficient and 3 mV hysteresis. Its watchdog timer clears on any WDI logic transition (min. 50 ns pulse width) and times out after 25.6 sec (typical), supporting robust firmware supervision in safety-critical embedded nodes.
Reset assertion occurs when VCC falls below 3.08 V (±2.5% over −40°C to +85°C), when MR is pulled low ≥1 µs, or when WDI remains static beyond watchdog timeout. The push-pull active-low RESET output drives logic-low ≤0.4 V at 3.2 mA sink (VCC ≥ 4.5 V) and logic-high ≥0.8×VCC at 800 µA source (VCC ≥ 4.5 V), ensuring reliable MCU reset signaling across operating voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±2.5% over −40°C to +85°C - ensures accurate brownout detection for 3.3 V systems |
| Reset Timeout | 1120 ms minimum - provides sufficient power stabilization time before releasing reset |
| Watchdog Timeout | 25.6 sec typical - enables long-cycle firmware supervision without excessive CPU overhead |
| Supply Current | 12 µA typical at VCC = 3.6 V - supports battery-powered portable instrumentation |
| RESET Output Type | Push-pull active-low - eliminates need for external pull-up resistor; valid to VCC = 1 V |
| MR Input | Active-low with 52 kΩ internal pull-up - simplifies push-button reset interface with no external components |
| Operating Temp | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
ADM6316DZ31ARJ-RL7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 1.90 mm body width, 2.90 mm length, and 1.30 mm height. Pin 1 is RESET (active-low push-pull), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is WDI (watchdog input), and Pin 5 is VCC (monitored supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low reset output | Asserted during undervoltage, MR activation, or watchdog timeout; push-pull stage guarantees logic levels down to VCC = 1 V |
| 2 - GND | Ground reference | Common return path for internal reference, reset generator, and input comparators |
| 3 - MR | Manual reset input | Active-low input with internal 52 kΩ pull-up; ≥1 µs low pulse triggers reset; debounced on-chip |
| 4 - WDI | Watchdog input | Logic transition detector; clears watchdog timer on rising/falling edge; floating disables watchdog |
| 5 - VCC | Monitored supply voltage | Input for reset threshold comparison; also powers internal circuitry; operates from 1 V to 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| 26 selectable reset thresholds | Enables precise matching to system supply rails (2.5 V–5.0 V in 100 mV steps), including 3.08 V for 3.3 V nominal systems |
| Four reset timeout options | 1120 ms minimum timeout (D-suffix) ensures stable power delivery before MCU release in high-capacitance systems |
| Four watchdog timeout options | 25.6 sec typical (Z-suffix) allows infrequent but reliable firmware health checks in low-duty-cycle applications |
| VCC glitch immunity | Rejects transients ≤100 ns (typical) on MR and VCC lines, preventing spurious resets in noisy industrial environments |
| Valid RESET to VCC = 1 V | Guarantees clean reset assertion even during deep brownout, enabling safe shutdown sequencing |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3 V main supply in a DIN-rail mounted programmable logic controller exposed to wide ambient temperature swings and EMI-rich factory floor environments. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and watchdog supervision of real-time control firmware. Use Value: Prevents erratic operation during line sags by asserting RESET until VCC stabilizes above 3.08 V; 25.6 sec watchdog interval aligns with safety-critical motion cycle timing. | Use Scenario: Embedded in a battery-powered infusion pump requiring fail-safe behavior during low-battery conditions and software lockup. IC Role / Device Role / Timing Role: System supervisor ensuring deterministic restart on power loss and detecting firmware hangs via WDI strobing. Use Value: 1120 ms reset timeout allows full capacitor discharge/recharge before MCU boot; push-pull RESET eliminates external components, reducing BOM count and board area. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Used in a Class 0.5 smart electricity meter operating from split-phase AC-derived 3.3 V rail with frequent transient events on the power line. IC Role / Device Role / Timing Role: Voltage monitor and watchdog co-processor that validates supply integrity and enforces firmware liveness. Use Value: 40 ppm/°C threshold drift and 3 mV hysteresis ensure stable reset point across −25°C to +70°C operating range; MR input supports field-service reset via front-panel button. | Use Scenario: Integrated into a BCM managing door locks, lighting, and window controls, powered from vehicle battery (9 V–16 V) via local 3.3 V LDO. IC Role / Device Role / Timing Role: Power supervisor verifying regulated 3.3 V rail stability and guarding against CAN stack lockups. Use Value: Glitch rejection prevents false resets during load-dump transients; 3.08 V threshold matches LDO dropout margin, ensuring reset before functional failure. |
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 | 3.08 V fixed reset threshold, 1.5 sec watchdog timeout, open-drain RESET, no MR input | Lacks manual reset capability; requires external pull-up; suited for simpler reset-only use cases | Select when manual reset is unnecessary and open-drain flexibility is preferred for level-shifting |
| TPS3808G30DBVR | 3.0 V reset threshold (±0.5%), 200 ms reset timeout, no watchdog, MR input present | No watchdog functionality; tighter threshold tolerance but shorter reset timeout; lower quiescent current (1.8 µA) | Select when watchdog is not required and ultra-low power is prioritized over supervision depth |
Compared with MAX6361LTT+T and TPS3808G30DBVR, the ADM6316DZ31ARJ-RL7 uniquely combines 3.08 V precision reset, 1120 ms extended reset hold time, 25.6 sec watchdog, and MR input in a single push-pull-output SOT-23 device-making it optimal for industrial controllers needing both robust brownout response and long-interval firmware supervision.
Availability
ADM6316DZ31ARJ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for ADM6316DZ31ARJ-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 is part of Analog Devices' precision power supervision portfolio, engineered for reliability-critical embedded systems where deterministic reset behavior and firmware watchdog coverage are mandatory.
FAQ
What is the exact reset threshold voltage of the ADM6316DZ31ARJ-RL7 and how does it vary with temperature?
The ADM6316DZ31ARJ-RL7 has a nominal reset threshold of 3.08 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, meaning the threshold drifts predictably with ambient changes-e.g., a 50°C rise causes ~2.0 mV shift. This specification is verified in Table 5 and Figure 9 of the Rev. I datasheet, ensuring consistent brownout detection across operating conditions for the ADM6316DZ31ARJ-RL7.
Does the ADM6316DZ31ARJ-RL7 require an external pull-up resistor on its RESET pin?
No, the ADM6316DZ31ARJ-RL7 features a push-pull active-low RESET output, eliminating the need for an external pull-up resistor. Its output can actively drive low (≤0.4 V at 3.2 mA sink) and high (≥0.8×VCC at 800 µA source), ensuring valid logic levels across VCC = 1 V to 5.5 V. This reduces BOM count and PCB footprint versus open-drain alternatives-confirmed in the "Push-Pull Output" section of the Rev. I datasheet for the ADM6316DZ31ARJ-RL7.
How is the watchdog timeout configured on the ADM6316DZ31ARJ-RL7, and can it be disabled?
The ADM6316DZ31ARJ-RL7 watchdog timeout is factory-configured to 25.6 sec typical (Z-suffix), and cannot be adjusted externally. It is disabled by leaving the WDI pin unconnected (floating), which disconnects the watchdog timer from the reset circuitry per the datasheet's "Watchdog Input" section. Driving WDI continuously high or low also disables it, but floating is the recommended method-ensuring the ADM6316DZ31ARJ-RL7 operates as a pure voltage supervisor when needed.
What is the minimum pulse width required on the MR input of the ADM6316DZ31ARJ-RL7 to trigger a reset?
The MR input of the ADM6316DZ31ARJ-RL7 requires a minimum low pulse width of 1 µs to assert reset, as specified in Table 2 and confirmed in Figure 15 of the Rev. I datasheet. The internal debounce circuit rejects glitches <100 ns, ensuring noise immunity. This short pulse requirement simplifies mechanical push-button integration-no external RC filtering is needed, and the 52 kΩ internal pull-up guarantees default-high state for the ADM6316DZ31ARJ-RL7.
Is the ADM6316DZ31ARJ-RL7 compatible with 1.8 V or 2.5 V microcontrollers?
Yes, the ADM6316DZ31ARJ-RL7 operates with VCC as low as 1 V and guarantees valid RESET output down to that level, making it compatible with 1.8 V and 2.5 V microcontrollers. Its push-pull output delivers logic-low ≤0.3 V (at 50 µA sink) and logic-high ≥0.8×VCC across the full 1 V–5.5 V supply range. However, the 3.08 V reset threshold means it monitors a higher rail (e.g., 3.3 V LDO output) feeding those low-voltage MCUs-not the 1.8 V/2.5 V core rails directly.
ADM6316DZ31ARJ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM6316DZ31ARJ-RL7 FAQ
1.How can I place an order for ADM6316DZ31ARJ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6316DZ31ARJ-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 ADM6316DZ31ARJ-RL7 reliable?
The price and inventory of ADM6316DZ31ARJ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6316DZ31ARJ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM6316DZ31ARJ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6316DZ31ARJ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6316DZ31ARJ-RL7?
ADM6316DZ31ARJ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6316DZ31ARJ-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 ADM6316DZ31ARJ-RL7?
For technical support, including ADM6316DZ31ARJ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6316DZ31ARJ-RL7 requirements.
6.How does Aetrix verify that ADM6316DZ31ARJ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6316DZ31ARJ-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 ADM6316DZ31ARJ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6316DZ31ARJ-RL7?
All ADM6316DZ31ARJ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6316DZ31ARJ-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 ADM6316DZ31ARJ-RL7 part is unused and in its original packaging.
Return procedure for ADM6316DZ31ARJ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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