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Analog Devices Inc. ADM6316AZ29ARJZ-R7
- Part No.:
- ADM6316AZ29ARJZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ADM6316AZ29ARJZ-R7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
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Product details
Overview
ADM6316AZ29ARJZ-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 2.93 V reset threshold (±2.5% over −40°C to +85°C), 1 ms minimum reset timeout, 25.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates from 1 V to 5.5 V supply. It is used in embedded controllers where reliable power-on reset and fail-safe recovery from software lockup are required.
For engineers reviewing the ADM6316AZ29ARJZ-R7 datasheet, ADM6316AZ29ARJZ-R7 pinout, ADM6316AZ29ARJZ-R7 application, or ADM6316AZ29ARJZ-R7 equivalent, key selection criteria include reset threshold accuracy at industrial temperature, guaranteed RESET validity down to VCC = 1 V, watchdog timeout stability across temperature, and compatibility with low-power portable systems requiring <12 µA typical supply current at 3.6 V.
Technical Context
The ADM6316AZ29ARJZ-R7 implements a precision bandgap-based reset threshold detector with 40 ppm/°C temperature coefficient and 3 mV hysteresis, ensuring stable trip points across −40°C to +85°C. Its watchdog timer clears on any WDI logic transition (min. 50 ns pulse width) and times out after 25.6 sec (typical), with reset assertion holding for 1 ms minimum after timeout.
It integrates internal MR pull-up (52 kΩ), glitch rejection on MR (100 ns), and VCC transient immunity-e.g., a 100 mV undershoot below 2.93 V threshold is tolerated for up to ~8 µs without spurious reset. The push-pull RESET output drives low to ≤0.3 V at 1.2 mA (VCC ≥ 2.7 V) and high to ≥0.8×VCC at 500 µA (VCC ≥ 1.8 V), valid down to VCC = 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±2.5% over −40°C to +85°C - ensures reliable brownout detection for 3.3 V systems with margin. |
| Reset Timeout | 1 ms minimum - provides sufficient hold time for microprocessor initialization after power stabilization. |
| Watchdog Timeout | 25.6 sec typical - enables long-duration task supervision without excessive CPU overhead. |
| Supply Current | 5 µA typical at VCC = 3.6 V - supports battery-powered applications with multi-year runtime. |
| RESET Output Type | Push-pull active-low - eliminates need for external pull-up resistor; drives low to ≤0.3 V at 1.2 mA. |
| VCC Operating Range | 1 V to 5.5 V - guarantees functional reset assertion even during deep brownout or partial power loss. |
| MR Input | Active-low with 52 kΩ internal pull-up - simplifies push-button interface; requires only momentary ground connection. |
Pinout & Package
ADM6316AZ29ARJZ-R7 is housed in a 5-lead SOT-23 package (JEDEC MO-178-AA compliant), measuring 2.90 mm × 1.60 mm × 1.15 mm, with gull-wing leads and 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserted when VCC < 2.93 V, MR is low, or WDI unattended for 25.6 sec; valid down to VCC = 1 V. |
| 2 - GND | Ground reference | Common return path for internal circuitry and RESET output stage; must be low-impedance. |
| 3 - MR | Manual reset input | Active-low signal; internal 52 kΩ pull-up ensures default high; ≥1 µs low pulse triggers reset. |
| 4 - WDI | Watchdog input | Logic transition (min. 50 ns) resets watchdog timer; floating disables watchdog function. |
| 5 - VCC | Supply voltage input | Monitored rail; powers device and sets reset threshold reference; operates from 1 V to 5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity to VCC = 1 V | Enables fail-safe reset assertion during severe brownout conditions where other supervisors may release prematurely. |
| 25.6 sec typical watchdog timeout | Supports long-latency firmware tasks (e.g., sensor calibration, communication handshaking) without requiring frequent WDI toggling. |
| 1 ms minimum reset timeout | Meets fast-boot requirements of modern microcontrollers while avoiding race conditions during power ramp. |
| 52 kΩ internal MR pull-up | Reduces BOM count by eliminating external pull-up; ensures defined logic state when MR is unconnected. |
| Power supply glitch immunity | Rejects transients ≤100 mV undershoot lasting ≤8 µs (for 2.93 V threshold), preventing false resets in noisy environments. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3 V system rail in a DIN-rail mounted programmable logic controller subject to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Provides power-on reset, brownout protection, and watchdog supervision of main MCU; asserts RESET until VCC stabilizes above 2.93 V for ≥1 ms. Use Value: Prevents erratic operation during factory power cycling or field voltage sags; 25.6 sec watchdog timeout accommodates extended I/O scan cycles without false triggering. | Use Scenario: Embedded in a battery-powered infusion pump requiring FDA-grade reliability and fault containment. IC Role / Device Role / Timing Role: Supervises MCU supply and validates software execution via WDI; manual reset allows clinician-initiated recovery without power cycle. Use Value: 5 µA quiescent current extends battery life; guaranteed RESET down to VCC = 1 V ensures safe shutdown during end-of-battery discharge. |
| Smart Energy Meter | Automotive Body Control Module |
Use Scenario: Installed in a Class 0.5 smart meter operating across −25°C to +70°C with intermittent RF interference. IC Role / Device Role / Timing Role: Detects undervoltage on 3.3 V microcontroller rail and resets on software hang; MR pin enables firmware-triggered self-test entry. Use Value: 40 ppm/°C threshold drift maintains accuracy across temperature; MR debounce and 100 ns glitch rejection prevent noise-induced resets. | Use Scenario: Used in a 12 V automotive body control module with local 3.3 V LDO powering an ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Monitors post-LDO rail; asserts RESET during cold-crank (VCC dip to ~2.8 V) and recovers automatically when voltage rises above 2.93 V. Use Value: 2.93 V threshold aligns precisely with 3.3 V system margin; push-pull output drives MCU nRST directly without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D3+ | 2.93 V reset threshold, 1.5 ms min reset timeout, no watchdog timer, open-drain RESET, 1.8–5.5 V supply | Lacks watchdog supervision; requires external pull-up; suited for simpler reset-only use cases | Select when watchdog functionality is unnecessary and open-drain output is preferred for wired-OR reset buses |
| TPS3808G33DBVR | 3.3 V reset threshold, 200 ms min reset timeout, no manual reset input, push-pull RESET, 0.8–6 V supply | Higher threshold and longer timeout; no MR pin; optimized for 3.3 V systems without manual intervention needs | Select when precise 3.3 V monitoring is required and manual reset is not needed in the system architecture |
Compared with MAX6326UT29D3+ and TPS3808G33DBVR, ADM6316AZ29ARJZ-R7 uniquely combines 2.93 V threshold accuracy, 1 ms reset timeout, integrated watchdog with 25.6 sec option, and manual reset-all in a 5-pin SOT-23-making it optimal for compact, safety-critical embedded systems demanding full supervision coverage.
Availability
ADM6316AZ29ARJZ-R7 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 and long-term lifecycle support.
Supply support for ADM6316AZ29ARJZ-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 ADM63xx family was designed specifically for robust microprocessor supervision in harsh industrial and portable environments, emphasizing low power, wide temperature operation, and integrated fault-detection features like watchdog and manual reset.
FAQ
What is the exact reset threshold voltage of ADM6316AZ29ARJZ-R7 and how does it vary with temperature?
The ADM6316AZ29ARJZ-R7 has a nominal reset threshold of 2.93 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, meaning the threshold drifts by approximately ±0.012 V across the full range-ensuring predictable brownout behavior in thermally variable deployments.
Does ADM6316AZ29ARJZ-R7 require an external pull-up resistor on its RESET pin?
No, ADM6316AZ29ARJZ-R7 does not require an external pull-up resistor because it features a push-pull active-low RESET output. The internal driver can both sink and source current, delivering logic-low output ≤0.3 V at 1.2 mA (VCC ≥ 2.7 V) and logic-high output ≥0.8×VCC at 500 µA (VCC ≥ 1.8 V), eliminating external components for standard interfacing.
How is the watchdog timeout configured on ADM6316AZ29ARJZ-R7, and can it be disabled?
The watchdog timeout on ADM6316AZ29ARJZ-R7 is factory-configured to 25.6 sec (typical), indicated by the "Z" suffix in the part number. It is disabled by leaving the WDI pin floating-internal circuitry disconnects the watchdog timer from the reset path. No configuration pins or registers are involved; behavior is purely hardware-defined.
What is the minimum pulse width required on the MR pin to trigger a reset on ADM6316AZ29ARJZ-R7?
The ADM6316AZ29ARJZ-R7 requires a minimum MR pulse width of 1 µs to assert reset. This specification holds across the full operating temperature range, with typical minimum pulse width ranging from ~110 ns at +85°C to ~190 ns at −50°C per Figure 15-ensuring reliable manual reset initiation even under worst-case timing conditions.
Can ADM6316AZ29ARJZ-R7 operate reliably when VCC drops below 2.0 V?
Yes, ADM6316AZ29ARJZ-R7 is fully specified to operate down to VCC = 1 V. Its RESET output remains valid (logic-low ≤0.3 V, logic-high ≥0.8×VCC) at VCC = 1 V, and the reset generator continues asserting RESET as long as VCC stays below 2.93 V-even during deep brownout. This capability is explicitly guaranteed in the datasheet and critical for fail-safe shutdown sequences.
ADM6316AZ29ARJZ-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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ADM6316AZ29ARJZ-R7 FAQ
1.How can I place an order for ADM6316AZ29ARJZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6316AZ29ARJZ-R7 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 ADM6316AZ29ARJZ-R7 reliable?
The price and inventory of ADM6316AZ29ARJZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6316AZ29ARJZ-R7 is usually 5 days.
3.What payment methods are accepted for ADM6316AZ29ARJZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6316AZ29ARJZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6316AZ29ARJZ-R7?
ADM6316AZ29ARJZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6316AZ29ARJZ-R7 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 ADM6316AZ29ARJZ-R7?
For technical support, including ADM6316AZ29ARJZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6316AZ29ARJZ-R7 requirements.
6.How does Aetrix verify that ADM6316AZ29ARJZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADM6316AZ29ARJZ-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 ADM6316AZ29ARJZ-R7 meets industry standards.
7.What is the process for return or replacement of ADM6316AZ29ARJZ-R7?
All ADM6316AZ29ARJZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6316AZ29ARJZ-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 ADM6316AZ29ARJZ-R7 part is unused and in its original packaging.
Return procedure for ADM6316AZ29ARJZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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