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Analog Devices Inc. ADM8616SCYAKSZ-RL7
- Part No.:
- ADM8616SCYAKSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
ADM8616SCYAKSZ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,481
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Product details
Overview
ADM8616SCYAKSZ-RL7 from Analog Devices is a low-voltage supervisory circuit with integrated watchdog timer in a 4-lead SC70 package, designed to monitor VCC supply voltage and ensure microprocessor code execution integrity. It features a 2.93 V reset threshold, 140 ms reset timeout, 1.6 s watchdog timeout, push-pull active-low RESET output, and guaranteed operation down to VCC = 1 V - used in portable microprocessor systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the ADM8616SCYAKSZ-RL7 datasheet, ADM8616SCYAKSZ-RL7 pinout, ADM8616SCYAKSZ-RL7 application, or ADM8616SCYAKSZ-RL7 equivalent, key selection criteria include reset threshold accuracy (±13 mV at 2.93 V), watchdog timeout stability over temperature (±15% variation), push-pull drive capability (1.2 mA sink at 2.7 V), glitch immunity against sub-8 µs transients, and SC70 footprint compatibility for space-constrained embedded designs.
Technical Context
The ADM8616SCYAKSZ-RL7 implements a precision bandgap-based voltage reference (40 ppm/°C tempco) feeding a comparator that triggers RESET when VCC falls below 2.93 V. Its internal watchdog timer clears on any WDI logic transition (min. 50 ns pulse width) and asserts RESET if no transition occurs within 1.6 s.
RESET assertion is synchronized to VCC monitoring and watchdog events, with fixed 140 ms minimum active duration after VCC recovery or watchdog timeout. The push-pull output ensures defined high/low states without external pull-up, supporting direct interface to microprocessor RESET inputs across 1.0–5.5 V VCC range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±13 mV - sets precise undervoltage detection point for 3.3 V rail supervision |
| Reset Timeout | 140 ms min - guarantees sufficient hold time for processor initialization after power stabilization |
| Watchdog Timeout | 1.6 s typ - enables robust software hang detection without excessive false resets |
| Supply Current | 5 µA typ at 3.6 V - enables battery-powered operation for >10-year shelf life in portable devices |
| RESET Output Type | Push-pull active-low - eliminates need for external pull-up resistor, reduces BOM count |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid RESET assertion during deep brownout down to 1 V |
| Temp Range | −40°C to +85°C - qualified for industrial and automotive cabin-ambient environments |
Pinout & Package
ADM8616SCYAKSZ-RL7 is housed in a 4-lead SC70 (KS-4) package measuring 2.20 mm × 1.35 mm × 0.95 mm, with gull-wing leads and RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparators and output stage; must be connected to system ground plane |
| 2 (RESET) | Active-Low Reset Output | Push-pull driver asserts logic low during undervoltage or watchdog timeout; drives microprocessor RESET input directly |
| 3 (WDI) | Watchdog Input | Edge-sensitive input; toggling clears watchdog timer; floating disables watchdog function |
| 4 (VCC) | Supply Voltage Input | Monitored rail input; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Glitch Immunity | Rejects transients ≤8 µs at 100 mV below 2.93 V threshold - prevents spurious resets from EMI or switching noise |
| VCC = 1 V RESET Validity | Guaranteed logic-low RESET output even as supply collapses to 1 V - ensures fail-safe behavior during deep brownout |
| Low Power Consumption | 5 µA typical quiescent current - extends battery life in always-on portable instrumentation |
| WDI Pulse Detection | Recognizes 50 ns minimum WDI transitions - accommodates fast microcontroller GPIO toggle rates |
| Reset Threshold Hysteresis | 2 × VTH (≈5.86 mV) - prevents oscillation near threshold during slow VCC ramp-up/down |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered handheld ECG or glucose meter operating from single-cell Li-ion (2.7–4.2 V). IC Role / Device Role / Timing Role: Supervises main 3.3 V LDO output and asserts RESET if voltage drops below 2.93 V or firmware hangs. Use Value: Ensures deterministic boot after battery insertion and prevents corrupted memory writes during low-VCC operation. | Use Scenario: DIN-rail mounted programmable logic controller with 24 V DC input and isolated 3.3 V logic rail. IC Role / Device Role / Timing Role: Monitors 3.3 V microcontroller supply and provides 140 ms power-on reset plus 1.6 s watchdog safety net. Use Value: Guarantees safe startup after power interruption and recovers from firmware lockups without manual reset. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: ANSI C12.20-compliant electricity meter with dual-supply architecture (5 V analog, 3.3 V digital). IC Role / Device Role / Timing Role: Supervises 3.3 V digital rail using 2.93 V threshold and 140 ms timeout; WDI fed by real-time OS task scheduler. Use Value: Maintains metrology accuracy by preventing CPU crashes during voltage sags caused by load switching. | Use Scenario: 12 V vehicle battery-fed BCM managing door locks, lighting, and HVAC interfaces. IC Role / Device Role / Timing Role: Monitors 3.3 V MCU supply derived from buck converter; uses 1.6 s watchdog to detect CAN stack failures. Use Value: Enables autonomous recovery from communication faults without draining battery via repeated reboots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D3+T | 2.93 V reset threshold, 140 ms timeout, open-drain RESET, no watchdog | Lacks watchdog functionality; requires external timer or MCU software implementation | Select when watchdog is unnecessary and open-drain flexibility is preferred |
| TPS3808G33DBVR | 3.3 V reset threshold, 200 ms timeout, no watchdog, 1.8–6 V VCC range | Higher reset threshold unsuitable for 3.3 V rail margin; no hardware watchdog | Select only if system operates at nominal 3.3 V with tight tolerance and watchdog handled externally |
Compared with MAX6326UT29D3+T and TPS3808G33DBVR, the ADM8616SCYAKSZ-RL7 uniquely integrates both precise 2.93 V supervision and a configurable 1.6 s watchdog in SC70, eliminating external timing components while ensuring fail-safe recovery in resource-constrained embedded systems.
Availability
ADM8616SCYAKSZ-RL7 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, smart energy meters, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for ADM8616SCYAKSZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Norwood, MA.
The ADM8616/ADM8617 product line delivers compact, ultra-low-power supervisory circuits optimized for microprocessor-based systems where reliability, small size, and extended battery life are critical design requirements.
FAQ
What is the exact reset threshold voltage of the ADM8616SCYAKSZ-RL7?
The ADM8616SCYAKSZ-RL7 has a nominal reset threshold of 2.93 V, with a guaranteed range of 2.85 V to 3.00 V at 25°C and ±13 mV tolerance over temperature. This value is factory-trimmed and specified in Table 1 of the Rev. C datasheet under the "ADM861xS" option, matching the 'S' suffix in the part number.
Does the ADM8616SCYAKSZ-RL7 require an external pull-up resistor on the RESET pin?
No, the ADM8616SCYAKSZ-RL7 does not require an external pull-up resistor because it features a push-pull active-low RESET output. The internal driver actively pulls low during assertion and drives high (to ≥0.8 × VCC) when deasserted, enabling direct connection to microprocessor RESET inputs without additional components.
How is the watchdog timeout configured on the ADM8616SCYAKSZ-RL7?
The watchdog timeout on the ADM8616SCYAKSZ-RL7 is fixed at 1.6 s (typical) and determined by the 'Y' suffix in the part number per the ordering guide. It cannot be adjusted externally; the timer clears on any WDI logic transition (min. 50 ns) and asserts RESET if no transition occurs within this period.
Can the ADM8616SCYAKSZ-RL7 operate reliably at VCC = 1.2 V?
Yes, the ADM8616SCYAKSZ-RL7 guarantees valid RESET output operation down to VCC = 1.0 V, including full push-pull drive strength (0.3 V VOL at 100 µA sink) and accurate 2.93 V threshold sensing. At 1.2 V, all specifications remain functional per the Absolute Maximum Ratings and Electrical Characteristics tables.
What package type and marking code does the ADM8616SCYAKSZ-RL7 use?
The ADM8616SCYAKSZ-RL7 uses a 4-lead SC70 package (Analog Devices package code KS-4), with physical dimensions of 2.20 mm × 1.35 mm × 0.95 mm. Its top-side marking code is 'N0F', as confirmed in the Ordering Guide for ADM8616SCYAKSZ-RL7 and related standard models.
ADM8616SCYAKSZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
ADM8616SCYAKSZ-RL7 FAQ
1.How can I place an order for ADM8616SCYAKSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8616SCYAKSZ-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 ADM8616SCYAKSZ-RL7 reliable?
The price and inventory of ADM8616SCYAKSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8616SCYAKSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM8616SCYAKSZ-RL7?
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ADM8616SCYAKSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8616SCYAKSZ-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 ADM8616SCYAKSZ-RL7?
For technical support, including ADM8616SCYAKSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8616SCYAKSZ-RL7 requirements.
6.How does Aetrix verify that ADM8616SCYAKSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM8616SCYAKSZ-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 ADM8616SCYAKSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM8616SCYAKSZ-RL7?
All ADM8616SCYAKSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8616SCYAKSZ-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 ADM8616SCYAKSZ-RL7 part is unused and in its original packaging.
Return procedure for ADM8616SCYAKSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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