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Analog Devices Inc. ADM809JAKS-REEL7
- Part No.:
- ADM809JAKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809JAKS-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,736
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Product details
Overview
ADM809JAKS-REEL7 from Analog Devices is a microprocessor supervisory circuit in 3-lead SC70 package, providing push-pull active-low RESET output with 4.00 V reset threshold, 240 ms typical timeout, and operation down to 1.0 V VCC. It monitors power supply integrity during power-up, brownout, and power-down in embedded controllers and industrial microprocessor systems.
For engineers reviewing the ADM809JAKS-REEL7 datasheet, ADM809JAKS-REEL7 pinout, ADM809JAKS-REEL7 application, or ADM809JAKS-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), low 17 μA supply current, push-pull drive capability (3.2 mA sink), and SC70 footprint compatibility for space-constrained designs.
Technical Context
The ADM809JAKS-REEL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stable threshold detection across temperature (30 ppm/°C drift) and supports valid reset assertion even as VCC drops to 1.0 V.
This device operates exclusively in active-low push-pull mode-no external pull-up required-and features a dedicated GND pin, VCC monitor input, and RESET output. It belongs to the ADM803/ADM809/ADM810 family, where only ADM809 and ADM810 offer push-pull outputs; ADM803 uses open-drain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 V (typical at 25°C); accurate monitoring of 4 V nominal supplies with ±2.5% tolerance over −40°C to +125°C |
| Reset Timeout | 240 ms (typical); ensures microprocessor remains held in reset until power stabilizes after turn-on |
| Supply Current | 17 μA (typical at VCC < 3.6 V, −40°C to +85°C); enables use in battery-powered or ultra-low-power systems |
| VCC Operating Range | 1.0 V to 5.5 V; guarantees functional reset assertion even during deep brownout conditions |
| Output Type | Push-pull active-low RESET; drives logic inputs directly without external components |
| Reset Output Low Voltage | 0.4 V max at 3.2 mA sink (VCC = VTH min); ensures solid logic-low interface with 3.3 V or 5 V microcontrollers |
| Temperature Range | −40°C to +125°C; qualified for automotive under-hood and industrial control environments |
Pinout & Package
ADM809JAKS-REEL7 is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 2.10 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 noise immunity |
| 2 | RESET | Active-low push-pull output; asserts low during power-up/brownout and holds for 240 ms after VCC exceeds threshold |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.00 V threshold | Enables reliable supervision of 4 V rails (e.g., legacy I/O or auxiliary supplies) with minimal margin loss |
| 240 ms fixed reset timeout | Eliminates need for external RC timing components and ensures consistent boot sequencing |
| 17 μA quiescent current | Reduces standby power in always-on systems such as smart sensors and remote telemetry nodes |
| Operation down to 1.0 V VCC | Guarantees fail-safe reset assertion during severe undervoltage events before complete power collapse |
| Glitch-immune comparator | Rejects fast transients up to 100 mV overdrive, preventing spurious resets on noisy power rails |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Monitoring 4 V auxiliary supply powering CAN transceivers and sensor interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to hold CPU and peripherals in known state during rail instability. Use Value: Prevents firmware corruption during factory commissioning or field voltage sags by guaranteeing 240 ms minimum reset pulse width. |
Use Scenario: Ensuring safe startup of microcontroller-based door module electronics powered from vehicle battery via 4 V LDO. IC Role / Device Role / Timing Role: Reset generator with extended temperature range (−40°C to +125°C) and robust brownout response. Use Value: Maintains reset assertion down to 1.0 V VCC, enabling controlled shutdown during cranking-induced battery dips below 6 V. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
|
Use Scenario: Power supervision of ARM Cortex-M4 core running real-time diagnostics on dual-supply (4 V analog front-end, 3.3 V digital) architecture. IC Role / Device Role / Timing Role: Precision voltage monitor with low 17 μA supply current to extend battery life between calibrations. Use Value: Delivers accurate 4.00 V threshold with ±2.5% tolerance over full temperature range, reducing false-trigger risk in clinical environments. |
Use Scenario: Monitoring 4 V backup supply for RTC and nonvolatile memory during main AC power interruption. IC Role / Device Role / Timing Role: Fail-safe reset source that remains functional as backup rail decays from 4 V to 1.0 V. Use Value: Enables deterministic power-fail recovery sequence by asserting RESET before critical data registers lose retention voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM809JARTZ-REEL7 | SOT-23-3 package (RT-3), same 4.00 V threshold and push-pull output | Requires PCB layout change due to larger 3.04 mm × 1.40 mm footprint vs. SC70's 2.00 mm × 2.10 mm | Select when SOT-23 thermal performance (θJA = 270°C/W) or existing board space permits larger package |
| ADM810JAKSZ-REEL7 | Same SC70 package and 4.00 V threshold, but active-high RESET output | Requires logic inversion in host MCU interrupt path or level-shifting circuitry | Choose only if system design mandates active-high reset signaling and timing behavior matches (240 ms timeout) |
Compared with ADM809JAKS-REEL7, ADM809JARTZ-REEL7 trades compactness for higher thermal resistance, while ADM810JAKSZ-REEL7 changes signal polarity-neither is pin-compatible nor drop-in; both require schematic and layout review.
Availability
ADM809JAKS-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical handheld devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809JAKS-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 ADM809JAKS-REEL7 belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation and brownout protection in safety-critical embedded systems.
FAQ
What is the reset threshold voltage of the ADM809JAKS-REEL7?
The ADM809JAKS-REEL7 has a nominal reset threshold voltage of 4.00 V at 25°C, with guaranteed tolerance of ±2.5% over the full operating temperature range (−40°C to +125°C). This value is specified for the J-grade variant and applies only to ADM809 and ADM810 models per Table 3 of the datasheet.
Does the ADM809JAKS-REEL7 require an external pull-up resistor on the RESET pin?
No, the ADM809JAKS-REEL7 features a push-pull RESET output and does not require an external pull-up resistor. Unlike the open-drain ADM803, this device actively drives both high and low states, simplifying interface design and reducing BOM count.
What is the minimum VCC voltage at which the ADM809JAKS-REEL7 continues to assert RESET?
The ADM809JAKS-REEL7 maintains valid RESET assertion down to VCC = 1.0 V, as confirmed in the Absolute Maximum Ratings and General Description sections. Below this, the output enters high-impedance state and may float unless externally biased.
Can the ADM809JAKS-REEL7 be used in automotive applications?
Yes, the ADM809JAKS-REEL7 is rated for −40°C to +125°C operation and meets requirements for under-hood and body electronics. Its 4.00 V threshold aligns with common 4 V auxiliary rails in automotive ECUs, and its glitch immunity supports noisy vehicle electrical environments.
How does the reset timeout behave across temperature for the ADM809JAKS-REEL7?
The ADM809JAKS-REEL7 provides a typical 240 ms reset timeout at 25°C, with variation bounded between 140 ms and 460 ms over −40°C to +85°C, and 100 ms to 840 ms over +85°C to +125°C per Table 1. This ensures robust boot timing across all operating conditions.
ADM809JAKS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM809JAKS-REEL7 FAQ
1.How can I place an order for ADM809JAKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809JAKS-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 ADM809JAKS-REEL7 reliable?
The price and inventory of ADM809JAKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809JAKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809JAKS-REEL7?
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4.How is shipping managed for ADM809JAKS-REEL7?
ADM809JAKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809JAKS-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 ADM809JAKS-REEL7?
For technical support, including ADM809JAKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809JAKS-REEL7 requirements.
6.How does Aetrix verify that ADM809JAKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809JAKS-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 ADM809JAKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809JAKS-REEL7?
All ADM809JAKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809JAKS-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 ADM809JAKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM809JAKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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