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Analog Devices Inc. ADM809JAKS-REEL
- Part No.:
- ADM809JAKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809JAKS-REEL.pdf
- Description:
- IC SUPERVSR PUSH/PULL 4.0V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
ADM809JAKSZ-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.00 V reset threshold (±2.5% over −40°C to +125°C), 140–460 ms power-on reset timeout, 17 μA supply current, and operation down to 1.0 V VCC. It monitors 4 V-class power rails in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM809JAKSZ-REEL datasheet, ADM809JAKSZ-REEL pinout, ADM809JAKSZ-REEL application, or ADM809JAKSZ-REEL equivalent, key selection criteria include reset threshold accuracy at extended temperature, low-power operation under brownout, push-pull drive capability without external pull-up, and SC70 package compatibility with space-constrained PCB layouts.
Technical Context
The ADM809JAKSZ-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms (typical) reset timer. Its reference circuit maintains stable threshold performance across −40°C to +125°C with 30 ppm/°C temperature coefficient.
It asserts RESET low when VCC falls below 4.00 V (min 3.80 V, max 4.20 V at full temp range) and holds it for ≥140 ms after VCC rises above threshold. The push-pull output drives logic inputs directly-no external resistor required-and sinks up to 3.2 mA at VTH min while sourcing 500–800 μA depending on VCC and variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 V (typ), 3.80–4.20 V over −40°C to +125°C - ensures reliable reset assertion for 4 V nominal supplies under worst-case thermal drift. |
| Supply Current | 17 μA (typ) at VCC < 3.6 V - enables integration into battery-powered or ultra-low-power systems without compromising supervision integrity. |
| Reset Timeout | 140–460 ms (−40°C to +85°C), 100–840 ms (+85°C to +125°C) - guarantees sufficient hold time for slow-ramping or noisy power rails during startup. |
| VCC Operating Range | 1.0–5.5 V - supports valid reset assertion even during deep brownout conditions down to 1 V, critical for fail-safe system recovery. |
| Output Type | Push-pull active-low RESET - eliminates need for external pull-up resistor and provides robust drive into CMOS/TTL loads. |
| Reset Output Low Voltage | 0.4 V at ISINK = 3.2 mA, VCC = VTH min - ensures solid logic-low level compatible with 3.3 V and 5 V microcontroller reset inputs. |
| Reset Output High Voltage | 0.8 × VCC at ISOURCE = 500 μA - delivers rail-referenced high-level output suitable for direct interface to digital inputs. |
Pinout & Package
ADM809JAKSZ-REEL is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.95 mm, with gull-wing leads and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be connected to system ground plane for accurate threshold sensing. |
| 2 | RESET | Active-low push-pull output; asserts low during power-up, brownout, or power-down; drives microcontroller /RESET pin directly. |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.00 V ±2.5% over −40°C to +125°C - eliminates manual calibration and supports single-BOM designs across global operating environments. |
| Glitch-immune comparator | Immune to transients ≤100 μs at 100 mV overdrive - prevents spurious resets caused by switching noise or ESD-induced supply dips. |
| Ultra-low quiescent current | 17 μA typical - reduces standby power impact in always-on monitoring applications such as smart sensors and IoT edge nodes. |
| Extended VCC operating range | Functions down to 1.0 V VCC - ensures reset remains asserted through deep undervoltage events, enabling controlled shutdown before data corruption. |
| SC70 footprint compatibility | 3-lead KS-3 package - matches industry-standard 0.65 mm pitch layout, enabling drop-in replacement in space-constrained portable and automotive ECUs. |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
|
Use Scenario: Monitors 4 V backup rail powering real-time clock and nonvolatile memory during main power interruption. IC Role / Device Role / Timing Role: Supervisory circuit asserting /RESET to preserve SRAM contents and prevent firmware corruption during brownout. Use Value: 1.0 V minimum VCC operation ensures reset remains active until backup supply fully collapses, extending safe shutdown window by >200 ms vs. 2.5 V-threshold alternatives. |
Use Scenario: Validates 4 V Li-ion battery output before enabling FPGA configuration and sensor acquisition chain. IC Role / Device Role / Timing Role: Power-on reset generator holding processor in reset until regulated 3.3 V LDO stabilizes post-battery connection. Use Value: 140–460 ms timeout accommodates slow battery warm-up and cold-temperature rise times, eliminating boot failures below 0°C. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: Supervises 4 V CAN transceiver supply in junction box electronics exposed to load-dump transients. IC Role / Device Role / Timing Role: Brownout detector triggering immediate MCU reset upon 12 V system dip below 9 V, preventing CAN bus arbitration errors. Use Value: Glitch immunity rejects 50 ns–100 μs spikes from alternator ripple or relay switching, reducing false-reset rate by >99% vs. unfiltered comparators. |
Use Scenario: Ensures secure bootloader execution only after 4 V auxiliary supply reaches stable regulation during meter power-up. IC Role / Device Role / Timing Role: Reset supervisor coordinating secure boot sequence with tamper-detection circuitry and crypto accelerator enable timing. Use Value: Push-pull output drives dual-input NAND gate directly-no pull-up needed-reducing BOM count and PCB area in Class 0.2 revenue-grade meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.00 V threshold, SOT-23-3, 1.2 μA max supply current, 140 ms min reset pulse, open-drain output | Requires external pull-up; lower quiescent current but incompatible drive strength for direct MCU /RESET interface | Select when ultra-low power dominates over board space and drive simplicity; verify pull-up value for target VCC and capacitive load. |
| TPS3808G01DBVR | 4.00 V threshold, SOT-23-6, adjustable delay via capacitor, 1.8–6.0 V VCC range, push-pull output | Larger package and pin count; delay programmability adds flexibility but increases design complexity and cost | Choose when variable reset timeout is required across multiple platforms; not suitable for footprint-constrained SC70-only layouts. |
Compared with MAX809SEUR+T and TPS3808G01DBVR, ADM809JAKSZ-REEL delivers optimal balance of SC70 size, guaranteed push-pull drive, and wide-temperature threshold stability-making it preferred for compact, high-reliability 4 V rail supervision where layout efficiency and deterministic reset behavior are critical.
Availability
ADM809JAKSZ-REEL 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 across extended temperature and long product lifecycles.
Supply support for ADM809JAKSZ-REEL 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 ADM809 belongs to Analog Devices' microprocessor supervisory IC family, engineered specifically for robust, low-power power-monitoring in mission-critical embedded systems operating across −40°C to +125°C.
FAQ
What is the exact reset threshold voltage of ADM809JAKSZ-REEL and how does it vary with temperature?
The ADM809JAKSZ-REEL has a nominal reset threshold of 4.00 V at 25°C, with guaranteed range of 3.80 V to 4.20 V over −40°C to +125°C. This variation reflects ±2.5% tolerance plus 30 ppm/°C temperature coefficient, ensuring predictable assertion across automotive and industrial thermal profiles without external trimming.
Does ADM809JAKSZ-REEL require an external pull-up resistor on the RESET pin?
No, ADM809JAKSZ-REEL features a push-pull RESET output and does not require an external pull-up resistor. It actively drives both high and low states-delivering 0.8×VCC high-level and ≤0.4 V low-level-enabling direct connection to microcontroller /RESET inputs without additional components.
What is the minimum VCC voltage at which ADM809JAKSZ-REEL continues to assert RESET?
ADM809JAKSZ-REEL maintains valid RESET assertion down to VCC = 1.0 V, as specified in its absolute operating range. Below this, the internal circuitry ceases to function reliably; however, the device guarantees correct reset behavior throughout the full 1.0–5.5 V range, including deep brownout recovery scenarios.
Can ADM809JAKSZ-REEL replace ADM809JARTZ-REEL in an existing SOT-23 design?
No-ADM809JAKSZ-REEL uses a 3-lead SC70 (KS-3) package, while ADM809JARTZ-REEL uses 3-lead SOT-23 (RT-3). Their footprints are mechanically incompatible: SC70 is 2.00 mm × 1.25 mm with 0.65 mm lead pitch; SOT-23 is 2.90 mm × 1.30 mm with 0.95 mm pitch. Board redesign is required for substitution.
How does the reset timeout of ADM809JAKSZ-REEL behave across temperature?
ADM809JAKSZ-REEL's reset timeout varies with temperature: 140–460 ms at −40°C to +85°C, and 100–840 ms at +85°C to +125°C. This wide range accommodates process variation and thermal stress, ensuring reliable hold time regardless of ambient conditions-critical for automotive and outdoor industrial deployments.
ADM809JAKS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- -
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM809JAKS-REEL FAQ
1.How can I place an order for ADM809JAKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809JAKS-REEL 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 ADM809JAKS-REEL reliable?
The price and inventory of ADM809JAKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809JAKS-REEL is usually 5 days.
3.What payment methods are accepted for ADM809JAKS-REEL?
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4.How is shipping managed for ADM809JAKS-REEL?
ADM809JAKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809JAKS-REEL 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 ADM809JAKS-REEL?
For technical support, including ADM809JAKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809JAKS-REEL requirements.
6.How does Aetrix verify that ADM809JAKS-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809JAKS-REEL 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 ADM809JAKS-REEL meets industry standards.
7.What is the process for return or replacement of ADM809JAKS-REEL?
All ADM809JAKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809JAKS-REEL, 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 ADM809JAKS-REEL part is unused and in its original packaging.
Return procedure for ADM809JAKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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