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Analog Devices Inc. ADM6316BX46ARJZ-R7
- Part No.:
- ADM6316BX46ARJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6316BX46ARJZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,989
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Product details
Overview
ADM6316BX46ARJZ-R7 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 4.63 V reset threshold, 20 ms minimum reset timeout, 102 ms typical watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +85°C in 5-lead SOT-23. It is used in embedded controllers requiring reliable power-on reset and fault recovery.
For engineers reviewing the ADM6316BX46ARJZ-R7 datasheet, ADM6316BX46ARJZ-R7 pinout, ADM6316BX46ARJZ-R7 application, or ADM6316BX46ARJZ-R7 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 watchdog pulse detection as short as 50 ns.
Technical Context
The ADM6316BX46ARJZ-R7 implements a precision bandgap-based voltage reference with 40 ppm/°C temperature coefficient and 3 mV hysteresis to generate a stable 4.63 V reset threshold. Its watchdog timer clears on any logic transition at WDI and times out after 102 ms (typical) if unattended, asserting RESET to recover stalled firmware.
It integrates debounce and noise immunity on the manual reset (MR) input, rejecting transients ≤100 ns, and guarantees valid push-pull RESET output down to VCC = 1 V - enabling robust brownout detection without external supervision circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±2.5% over −40°C to +85°C - ensures accurate power-rail monitoring for 5 V systems with margin against undervoltage faults. |
| Reset Timeout | 20 ms minimum - provides sufficient stabilization time after VCC rise before releasing processor reset. |
| Watchdog Timeout | 102 ms typical - balances responsiveness to firmware hangs with tolerance for brief software delays. |
| Supply Current | 5 µA at VCC = 3.6 V - enables integration into battery-powered portable equipment without significant quiescent load. |
| RESET Output Type | Push-pull active-low - drives low without external pull-up, compatible with standard microcontroller reset inputs. |
| MR Input Pull-up | 52 kΩ internal - eliminates need for external resistor; supports direct connection to push-button switch to ground. |
| VCC Operating Range | 1 V to 5.5 V - allows operation during deep brownout and supports wide-input industrial power rails. |
Pinout & Package
ADM6316BX46ARJZ-R7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.8–3.0 mm body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts logic low when VCC < 4.63 V, MR is pulled low, or watchdog times out; valid down to VCC = 1 V. |
| 2 - GND | Ground reference | Common return path for internal reference, watchdog, and reset generator circuits. |
| 3 - MR | Manual reset input | Active-low input with 52 kΩ internal pull-up; ≥1 µs low pulse triggers reset; rejects ≤100 ns glitches. |
| 4 - WDI | Watchdog input | Clears watchdog timer on any logic transition; detects pulses ≥50 ns; floating disables watchdog. |
| 5 - VCC | Monitored supply voltage | Primary power input and voltage sense node; supplies internal circuitry and defines reset threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity to VCC = 1 V | Enables reliable reset assertion during severe brownout conditions without external level-shifting. |
| 4.63 V reset threshold with ±2.5% tolerance | Matches common 5 V rail monitoring requirements while accommodating production variation and temperature drift. |
| 102 ms typical watchdog timeout | Provides deterministic recovery window for real-time firmware loops without excessive latency. |
| Integrated MR debounce and 52 kΩ pull-up | Reduces BOM count and PCB area by eliminating external RC network for push-button reset interface. |
| Power supply glitch immunity | Rejects fast transients (e.g., 100 mV overdrive for ≤8 µs at VTH = 4.63 V), preventing spurious resets in noisy environments. |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Monitors 5 V system rail in programmable logic controller modules subject to field-induced transients and thermal cycling. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and watchdog-triggered recovery of ARM Cortex-M4 firmware. Use Value: Prevents corrupted state machine execution during voltage sags; 4.63 V threshold aligns with 5 V ±5% spec; 20 ms timeout accommodates slow-start DC/DC converters. | Use Scenario: Ensures safe boot and runtime integrity in battery-powered ultrasound probe with low-power sleep modes. IC Role / Device Role / Timing Role: Reset supervisor with manual reset button interface and watchdog monitoring of sensor acquisition firmware. Use Value: 5 µA quiescent current extends battery life; MR internal pull-up simplifies mechanical design; 102 ms watchdog timeout covers longest sensor initialization sequence. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Embedded in CAN-connected BCM managing door locks, lighting, and HVAC, operating across automotive temperature range. IC Role / Device Role / Timing Role: Voltage supervisor and watchdog for 32-bit MCU, interfacing with LIN transceivers and power switches. Use Value: −40°C to +85°C rating meets AEC-Q100 ambient requirements; glitch rejection prevents false resets from alternator ripple or load dump coupling. | Use Scenario: Used in utility-grade electricity meter with isolated RS-485 interface and tamper-detection logic. IC Role / Device Role / Timing Role: System-level reset manager ensuring secure boot and periodic watchdog verification of metrology firmware. Use Value: 4.63 V threshold matches internal 5 V LDO output; push-pull RESET drives meter MCU directly without pull-up; 20 ms timeout satisfies IEC 62056 power-up timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US46D3+T | 4.63 V reset threshold, 200 ms min reset timeout, no watchdog, open-drain RESET | Lacks watchdog functionality; requires external pull-up; suited for simpler reset-only use cases | Select when watchdog is unnecessary and board layout already includes pull-up resistor. |
| TPS3808G33DBVR | 3.3 V reset threshold, 200 ms min reset timeout, 200 ms watchdog, push-pull RESET | Fixed 3.3 V threshold; incompatible with 5 V rail monitoring; higher quiescent current (12 µA) | Choose only for 3.3 V systems where 4.63 V threshold is not required. |
Compared with MAX6326US46D3+T and TPS3808G33DBVR, ADM6316BX46ARJZ-R7 uniquely combines 4.63 V precision threshold, 20 ms short-reset timeout, integrated watchdog with 102 ms option, and push-pull output - making it optimal for compact 5 V microcontroller systems needing both voltage supervision and firmware execution monitoring.
Availability
ADM6316BX46ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for ADM6316BX46ARJZ-R7 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 supervisory IC portfolio, engineered for reliable microprocessor reset and watchdog protection in harsh industrial and portable environments.
FAQ
What is the exact reset threshold voltage of ADM6316BX46ARJZ-R7 and how does it vary with temperature?
The ADM6316BX46ARJZ-R7 has a nominal reset threshold of 4.63 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, resulting in predictable, bounded drift - for example, maximum deviation of ~11.6 mV over 125°C span. This ensures consistent brownout detection in thermally variable deployments without calibration.
Does ADM6316BX46ARJZ-R7 require an external pull-up resistor on the RESET pin?
No, ADM6316BX46ARJZ-R7 does not require an external pull-up resistor on the RESET pin because it features a push-pull active-low output stage. The device actively drives RESET low during assertion and high-impedance (or high) during deassertion, eliminating dependency on external components for logic-level translation or current sourcing.
How does the manual reset (MR) input of ADM6316BX46ARJZ-R7 behave when left unconnected?
When left unconnected, the MR input of ADM6316BX46ARJZ-R7 remains reliably high due to its internal 52 kΩ pull-up resistor. No external component is needed to prevent unintended reset assertion. The input also includes integrated debounce and rejects transients ≤100 ns, ensuring immunity to ESD or switching noise without additional filtering.
What is the shortest detectable pulse width on the WDI pin of ADM6316BX46ARJZ-R7?
The WDI pin of ADM6316BX46ARJZ-R7 detects logic transitions with minimum pulse width of 50 ns, as specified in the datasheet. This allows robust watchdog strobing even in high-speed firmware loops, and ensures the timer clears reliably on brief toggles - critical for low-power applications where WDI is pulsed infrequently but must be recognized without fail.
Can ADM6316BX46ARJZ-R7 operate with supply voltages below 2.5 V?
Yes, ADM6316BX46ARJZ-R7 operates from VCC = 1 V to 5.5 V. Its internal circuitry remains functional and RESET output remains valid down to VCC = 1 V, enabling use in ultra-low-voltage brownout scenarios or with partially discharged batteries. However, the 4.63 V reset threshold is referenced to VCC, so accurate monitoring of sub-2.5 V rails requires verifying that the absolute VCC level still exceeds the threshold hysteresis margin.
ADM6316BX46ARJZ-R7 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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM6316BX46ARJZ-R7 FAQ
1.How can I place an order for ADM6316BX46ARJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6316BX46ARJZ-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of ADM6316BX46ARJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6316BX46ARJZ-R7 is usually 5 days.
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5.How can I obtain technical support or documentation for ADM6316BX46ARJZ-R7?
For technical support, including ADM6316BX46ARJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6316BX46ARJZ-R7 requirements.
6.How does Aetrix verify that ADM6316BX46ARJZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6316BX46ARJZ-R7 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 ADM6316BX46ARJZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6316BX46ARJZ-R7?
All ADM6316BX46ARJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6316BX46ARJZ-R7, 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 ADM6316BX46ARJZ-R7 part is unused and in its original packaging.
Return procedure for ADM6316BX46ARJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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