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Analog Devices Inc. ADM8616TCYAKSZ-RL7
- Part No.:
- ADM8616TCYAKSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
ADM8616TCYAKSZ-RL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,566
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Product details
Overview
ADM8616TCYAKSZ-RL7 from Analog Devices is a low-voltage supervisory circuit with integrated watchdog timer, designed for microprocessor supply monitoring and code execution integrity assurance in embedded systems. It features a 3.08 V reset threshold, 140 ms reset timeout, 1.6 s watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +85°C in portable and industrial control applications.
For engineers reviewing the ADM8616TCYAKSZ-RL7 datasheet, ADM8616TCYAKSZ-RL7 pinout, ADM8616TCYAKSZ-RL7 application, or ADM8616TCYAKSZ-RL7 equivalent, key selection criteria include guaranteed RESET validity down to VCC = 1 V, glitch-immune power-on/brownout detection, watchdog pulse width tolerance (50 ns), and SC70 package compatibility with space-constrained PCB layouts.
Technical Context
The ADM8616TCYAKSZ-RL7 implements a precision voltage reference-based reset generator with hysteresis (2 × VTH) and a digital watchdog timer cleared by any WDI logic transition. Its internal comparator monitors VCC against a factory-trimmed 3.08 V threshold with ±40 ppm/°C temperature coefficient and 2.63 mV typical hysteresis.
RESET assertion occurs when VCC falls below 3.08 V or WDI remains static beyond 1.6 s; deassertion follows a fixed 140 ms timeout after VCC recovery or watchdog reset. The push-pull output drives low to ≤0.3 V at 1.2 mA (VCC ≥ 2.7 V) and high to ≥0.8 × VCC, enabling direct interface with 1.8 V–5 V logic without pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±0.08 V - precisely triggers reset during brownout at nominal 3.3 V rail collapse. |
| Reset Timeout | 140 ms (min) - ensures stable power-up delay before releasing processor from reset state. |
| Watchdog Timeout | 1.6 s (typ) - allows sufficient time for firmware loops while detecting hangs in real-time control tasks. |
| Supply Current | 5 µA (typ at VCC = 3.6 V) - enables battery-backed operation in portable instrumentation. |
| Operating Range | VCC = 1 V to 5.5 V - guarantees functional RESET output even during deep undervoltage conditions. |
| Output Type | Push-pull active-low - eliminates external pull-up, supports direct drive of MCU reset pins. |
| Temp Range | −40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
ADM8616TCYAKSZ-RL7 is housed in a 4-lead SC70 (KS-4) package measuring 2.20 mm × 1.35 mm × 0.95 mm, optimized for high-density PCBs and reflow-compatible with Pb-free soldering (260°C, 40 sec).
| 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 VCC undervoltage or watchdog timeout; valid down to VCC = 1 V. |
| 3 WDI | Watchdog Input | Edge-sensitive input requiring ≥50 ns pulses; floating disables watchdog; toggling resets internal timer. |
| 4 VCC | Monitored Supply Input | Primary power rail under supervision; also powers internal circuitry; accepts 1 V–5.5 V range. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | Factory-trimmed 3.08 V with ±0.08 V tolerance and 40 ppm/°C drift - eliminates need for external resistor dividers. |
| Glitch-immune VCC detection | Rejects transients <100 mV × 8 µs (for 2.93 V variant); validated via Figure 8 - prevents spurious resets in noisy power rails. |
| Low-power operation | 5 µA typical supply current at 3.6 V - extends battery life in handheld medical and sensor devices. |
| Valid RESET at low VCC | Guaranteed logic-level output down to VCC = 1 V - supports fail-safe behavior during catastrophic power collapse. |
| WDI edge sensitivity | Detects 50 ns minimum pulse width - accommodates fast firmware strobes without timing margin overhead. |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Microcontroller in programmable logic controller experiences brownout during factory power fluctuations. IC Role / Device Role / Timing Role: Supervisory IC asserting hardware RESET to prevent corrupted I/O register writes and unsafe actuator commands. Use Value: 3.08 V threshold matches 3.3 V I/O rail; 140 ms timeout ensures clean boot after line recovery; watchdog detects firmware lockup during analog signal processing. |
Use Scenario: Battery-powered ECG monitor enters low-power sleep mode between measurements. IC Role / Device Role / Timing Role: Power supervisor maintaining system integrity during VCC sag from pulse load; watchdog verifies firmware wake-up sequence completes. Use Value: 5 µA quiescent current minimizes standby drain; push-pull RESET eliminates pull-up resistor (saving board area); SC70 footprint fits compact front-end PCB. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: CAN-connected BCM suffers transient noise on 5 V supply during ignition switching. IC Role / Device Role / Timing Role: Voltage supervisor rejecting sub-10 µs glitches while asserting RESET on sustained undervoltage. Use Value: Glitch immunity per Figure 8 prevents false resets; −40°C to +85°C rating meets AEC-Q100 ambient requirements; RoHS-compliant KS-4 package supports automotive reflow profiles. |
Use Scenario: Revenue-grade meter executes metrology firmware under variable AC-DC converter output. IC Role / Device Role / Timing Role: Dual-function supervisor ensuring reliable startup after power interruption and detecting infinite loops in tamper-detection routines. Use Value: 1.6 s watchdog timeout aligns with 1-second metrology sampling interval; 3.08 V threshold guards against LDO dropout; RESET output directly interfaces with ARM Cortex-M0+ reset pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326T31D2+T | 3.08 V reset threshold, 140 ms timeout, open-drain output, 1.6 s watchdog - identical electrical specs but requires external pull-up. | Lacks push-pull drive; unsuitable where MCU reset pin has no internal pull-up or high-impedance state during power-up. | Select if board already uses open-drain supervisors and pull-up resistors are available; verify RESET rise time meets MCU tR requirement. |
| TPS3808G33DBVR | 3.3 V reset threshold (±0.5%), 200 ms timeout, push-pull output, no watchdog - higher threshold, longer timeout, no watchdog function. | Cannot replace watchdog functionality; suitable only for basic power-on reset where code execution monitoring is handled externally. | Choose when watchdog is unnecessary and 3.3 V rail tolerance permits 3.3 V threshold; confirm 200 ms timeout satisfies system boot timing budget. |
Compared with MAX6326T31D2+T and TPS3808G33DBVR, ADM8616TCYAKSZ-RL7 uniquely combines 3.08 V precision threshold, 140 ms reset delay, 1.6 s watchdog, and push-pull output in SC70 - enabling single-chip, no-component-added supervision for resource-constrained microcontrollers.
Availability
ADM8616TCYAKSZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, smart energy meters, and battery-powered IoT gateways requiring stable component supply and long-term lifecycle support.
Supply support for ADM8616TCYAKSZ-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, serving industrial, automotive, communications, and healthcare markets.
The ADM8616/ADM8617 product line delivers ultra-low-power, precision voltage supervision with integrated watchdog timers - engineered specifically for reliability-critical microprocessor systems where power integrity and software execution validation cannot be compromised.
FAQ
What is the exact reset threshold voltage of ADM8616TCYAKSZ-RL7?
The ADM8616TCYAKSZ-RL7 has a factory-trimmed reset threshold of 3.08 V, with a guaranteed range of 3.00 V to 3.15 V at −40°C to +85°C. This value is confirmed in Table 1 of the Rev. C datasheet under "ADM861xT" option and corresponds to the 'T' suffix in the ordering code. The threshold exhibits ±40 ppm/°C temperature coefficient and includes 2 × VTH hysteresis for noise immunity.
Does ADM8616TCYAKSZ-RL7 require an external pull-up resistor on the RESET pin?
No, ADM8616TCYAKSZ-RL7 does not require an external pull-up resistor because it features a push-pull active-low RESET output. The output actively drives high (≥0.8 × VCC) and low (≤0.3 V at 1.2 mA) without external components. This is explicitly stated in the Functional Block Diagram, General Description, and RESET Output section of the datasheet, distinguishing it from the open-drain ADM8617 variants.
What is the watchdog timeout period for ADM8616TCYAKSZ-RL7, and how is it configured?
The ADM8616TCYAKSZ-RL7 has a watchdog timeout period of 1.6 seconds (typical), corresponding to the 'Y' suffix in its ordering code (ADM8616TCYAKSZ-RL7). This value is fixed at manufacture and cannot be adjusted externally. The watchdog timer resets on any logic transition (low-to-high or high-to-low) at the WDI pin, with minimum detectable pulse width of 50 ns, as specified in Table 1 under "Watchdog Timeout Period".
Can ADM8616TCYAKSZ-RL7 operate reliably when VCC drops below 1.8 V?
Yes, ADM8616TCYAKSZ-RL7 guarantees valid RESET output functionality down to VCC = 1 V, as stated in the General Description and Specifications table ("Guaranteed reset output valid to VCC = 1 V"). Its supply current remains stable (5 µA typ at 1.5 V per Figure 3), and RESET output voltage levels meet specification (VOL ≤ 0.3 V at ISINK = 50 µA) even at 1.0 V VCC - making it suitable for deep brownout recovery scenarios.
How is the reset timeout period determined for ADM8616TCYAKSZ-RL7?
The reset timeout period for ADM8616TCYAKSZ-RL7 is 140 ms (minimum), corresponding to the 'C' suffix in its part number (ADM8616TCYAKSZ-RL7). This fixed delay begins when VCC rises above the 3.08 V threshold and ends when RESET deasserts. It is implemented via an internal RC oscillator and is specified across temperature (−40°C to +85°C) with typical value 200 ms and max 280 ms per Table 1.
ADM8616TCYAKSZ-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:
- 3.08V
- 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
ADM8616TCYAKSZ-RL7 FAQ
1.How can I place an order for ADM8616TCYAKSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8616TCYAKSZ-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 ADM8616TCYAKSZ-RL7 reliable?
The price and inventory of ADM8616TCYAKSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8616TCYAKSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM8616TCYAKSZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8616TCYAKSZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8616TCYAKSZ-RL7?
ADM8616TCYAKSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8616TCYAKSZ-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 ADM8616TCYAKSZ-RL7?
For technical support, including ADM8616TCYAKSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8616TCYAKSZ-RL7 requirements.
6.How does Aetrix verify that ADM8616TCYAKSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM8616TCYAKSZ-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 ADM8616TCYAKSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM8616TCYAKSZ-RL7?
All ADM8616TCYAKSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM8616TCYAKSZ-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 ADM8616TCYAKSZ-RL7 part is unused and in its original packaging.
Return procedure for ADM8616TCYAKSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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