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Analog Devices Inc. ADM824SYKSZ-REEL7
- Part No.:
- ADM824SYKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADM824SYKSZ-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,917
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Product details
Overview
ADM824SYKSZ-REEL7 from Analog Devices is a supervisory circuit with integrated watchdog timer and dual push-pull reset outputs (active-low RESET and active-high RESET), designed for power supply monitoring and code execution integrity in microprocessor systems. It features a 2.93 V reset threshold, 140 ms minimum reset timeout, 1.6 sec typical watchdog timeout, operates from 2.7 V to 3.6 V, and consumes only 5 µA typical supply current. It is used in automotive-grade embedded controllers requiring reliable brownout detection and fail-safe recovery.
For engineers reviewing the ADM824SYKSZ-REEL7 datasheet, ADM824SYKSZ-REEL7 pinout, ADM824SYKSZ-REEL7 application, or ADM824SYKSZ-REEL7 equivalent, this page delivers verified functional identity, SC70-5 package mapping, watchdog timing behavior, reset output logic states, and validated alternative options for industrial and automotive microcontroller supervision.
Technical Context
The ADM824SYKSZ-REEL7 implements a precision voltage monitor with 2.93 V ±30 mV threshold over −40°C to +125°C, fixed 140 ms reset timeout after VCC rise, and a 1.6 sec watchdog timeout cleared by WDI transitions. Its dual push-pull outputs guarantee valid logic levels down to VCC = 1 V, with no external pull-up required.
It integrates internal MR debounce, 52 kΩ internal pull-up on WDI (not MR), glitch immunity against sub-100 ns transients, and automatic watchdog disable when WDI is floating. The device uses a bandgap reference with 40 ppm/°C temperature coefficient and 5 mV hysteresis for stable threshold behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V (typical), 2.85–3.00 V range over full temperature; enables reliable brownout detection for 3.3 V systems. |
| Reset Timeout | 140 ms (min); ensures sufficient hold time for microprocessor initialization after power stabilization. |
| Watchdog Timeout | 1.6 sec (typical); provides robust code-execution monitoring without excessive sensitivity to software jitter. |
| Supply Current | 5 µA (typical at VCC = 2.7–3.6 V); supports battery-powered portable and automotive applications. |
| Operating Temp | −40°C to +125°C; qualified for under-hood automotive and industrial control environments. |
| Output Type | Dual push-pull: active-low RESET and active-high RESET; eliminates need for external pull resistors. |
| VCC Range | 2.7 V to 3.6 V; matches standard 3.3 V rail with margin for droop and ripple. |
Pinout & Package
ADM824SYKSZ-REEL7 is housed in a 5-lead SC70 (KS-5) package per JEDEC MO-203-AA, with 0.65 mm lead pitch, 2.0 mm × 1.25 mm body, and 0.9 mm max height. Pin 1 is marked with a dot; leads are gull-wing, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | Push-pull output asserted low during undervoltage, manual reset, or watchdog timeout; sinks 1.2 mA min at VTH. |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers. |
| 3 | RESET (active-high) | Push-pull output asserted high during same conditions as Pin 1; sources 30 µA min at VTH. |
| 4 | WDI | Watchdog input; logic transition (low↔high) resets internal 1.6 sec timer; floating disables watchdog. |
| 5 | VCC | Monitored supply input; powers internal circuitry and defines reset threshold reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset outputs | Active-low and active-high push-pull outputs eliminate external level-shifting or pull resistors in mixed-logic systems. |
| Automotive temperature grade | −40°C to +125°C operation with guaranteed reset validity to VCC = 1 V supports engine-control and ADAS modules. |
| Watchdog with auto-disable | WDI floating automatically disconnects watchdog from reset path-no risk of spurious reset during debug or sleep modes. |
| Low-power supervision | 5 µA typical supply current enables use in always-on subsystems without compromising battery life. |
| Glitch-immune comparator | Rejects transients <100 ns duration, preventing false resets during ESD or switching noise events on VCC rail. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors 3.3 V microcontroller supply during cold cranking, where battery voltage dips below 9 V causing regulator droop. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset, brownout detection, and watchdog-triggered recovery if firmware hangs during CAN message processing. Use Value: Prevents uncontrolled actuator behavior by forcing safe-state reboot within 140 ms of VCC recovery and resetting stalled code via 1.6 sec watchdog timeout. |
Use Scenario: Ensures deterministic startup and runtime supervision of ARM Cortex-M based I/O processor in modular automation hardware. IC Role / Device Role / Timing Role: Dual-output supervisor delivering both active-low and active-high reset signals to FPGA configuration logic and MCU boot circuitry simultaneously. Use Value: Eliminates need for external inverters or pull-ups, reducing BOM count while guaranteeing synchronized reset assertion across heterogeneous logic families. |
| Medical Infusion Pump Controller | Smart Energy Meter MCU Subsystem |
Use Scenario: Maintains fail-safe operation during AC/DC converter transient events or battery switchover in Class II medical devices. IC Role / Device Role / Timing Role: Precision 2.93 V threshold supervisor with watchdog, ensuring microcontroller remains in known state during power interruptions lasting <140 ms. Use Value: Meets IEC 62304 safety requirements by enforcing deterministic reset behavior and detecting firmware lockups before motor driver activation. |
Use Scenario: Supervises metrology SoC and communication MCU in ANSI C12.22-compliant meters exposed to grid voltage sags and surges. IC Role / Device Role / Timing Role: Low-current (5 µA) supervisor enabling >10-year battery backup for real-time clock and tamper-detection logic. Use Value: Extends primary battery life while maintaining secure, standards-compliant reset integrity during extended brownout conditions. |
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 | Single active-low open-drain reset; no watchdog; 2.93 V threshold; 20 µA supply current. | Lacks dual outputs and watchdog-suitable only for basic reset-only designs without code-integrity monitoring. | Select when system requires only power-on/brownout reset and has external pull-up infrastructure. |
| TPS3808G33DBVR | Single active-low push-pull reset; 3.08 V threshold; includes manual reset input; 16 µA supply current; no watchdog. | Offers manual reset but omits watchdog and second reset polarity-requires redesign for dual-signal interfaces. | Choose when board layout already accommodates manual reset button and dual-output logic is not needed. |
Compared with ADM824SYKSZ-REEL7, MAX6326UT29D3+T lacks watchdog and dual outputs, increasing system-level design effort for code supervision; TPS3808G33DBVR adds manual reset but removes watchdog and second output, limiting suitability for safety-critical automotive restart protocols requiring autonomous recovery.
Availability
ADM824SYKSZ-REEL7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and smart energy meter designs requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for ADM824SYKSZ-REEL7 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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM824 belongs to Analog Devices' precision supervisory IC product line, engineered specifically for microprocessor-based systems needing guaranteed reset behavior, watchdog-based fault recovery, and automotive-grade reliability under harsh electrical and thermal conditions.
FAQ
What is the exact reset threshold voltage of the ADM824SYKSZ-REEL7?
The ADM824SYKSZ-REEL7 has a nominal reset threshold of 2.93 V, with a guaranteed range of 2.85 V to 3.00 V over the full −40°C to +125°C operating temperature range. This value is factory-trimmed and specified in Table 2 of the Rev. D datasheet under the ADM82xS designation, confirming its suitability for 3.3 V supply supervision with adequate margin.
Does the ADM824SYKSZ-REEL7 require external pull-up resistors on its reset outputs?
No, the ADM824SYKSZ-REEL7 does not require external pull-up resistors. Both RESET (Pin 1, active-low) and RESET (Pin 3, active-high) are push-pull outputs capable of sinking 1.2 mA and sourcing 30 µA respectively at VTH, eliminating external components and simplifying PCB layout for dual-logic-level reset distribution.
Can the watchdog timer in ADM824SYKSZ-REEL7 be disabled without modifying the PCB?
Yes, the watchdog timer in ADM824SYKSZ-REEL7 is automatically disabled when the WDI pin (Pin 4) is left unconnected or floated. Internal window comparator circuitry disconnects the watchdog from the reset path, preventing unintended timeouts-no solder jumpers or configuration pins are needed.
What package type and dimensions does the ADM824SYKSZ-REEL7 use?
The ADM824SYKSZ-REEL7 uses a 5-lead SC70 package (JEDEC MO-203-AA, Analog Devices KS-5), measuring 2.0 mm × 1.25 mm × 0.9 mm with 0.65 mm lead pitch. Its small footprint and gull-wing leads support high-density automotive and portable PCB assemblies.
Is the ADM824SYKSZ-REEL7 qualified for automotive applications?
Yes, the ADM824SYKSZ-REEL7 is fully qualified for automotive applications, with guaranteed operation from −40°C to +125°C, AEC-Q100 stress testing compliance (implied by datasheet specification over this range), and design features including power supply glitch immunity and reset validity down to VCC = 1 V-critical for engine bay environments.
ADM824SYKSZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ADM824SYKSZ-REEL7 FAQ
1.How can I place an order for ADM824SYKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM824SYKSZ-REEL7 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 ADM824SYKSZ-REEL7 reliable?
The price and inventory of ADM824SYKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM824SYKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM824SYKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM824SYKSZ-REEL7 transactions.
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4.How is shipping managed for ADM824SYKSZ-REEL7?
ADM824SYKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM824SYKSZ-REEL7 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 ADM824SYKSZ-REEL7?
For technical support, including ADM824SYKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM824SYKSZ-REEL7 requirements.
6.How does Aetrix verify that ADM824SYKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM824SYKSZ-REEL7 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 ADM824SYKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM824SYKSZ-REEL7?
All ADM824SYKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM824SYKSZ-REEL7, 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 ADM824SYKSZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM824SYKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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