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Analog Devices Inc. ADM809MAKS-REEL7
- Part No.:
- ADM809MAKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809MAKS-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,488
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Product details
Overview
ADM809MAKS-REEL7 from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.38 V reset threshold, and operation down to 1.0 V VCC. It provides 240 ms minimum power-on reset timeout, consumes 17 μA typical supply current, and is qualified for −40°C to +125°C industrial/automotive environments. It monitors 4.38 V supply rails in embedded controllers and intelligent instruments.
For engineers reviewing the ADM809MAKS-REEL7 datasheet, ADM809MAKS-REEL7 pinout, ADM809MAKS-REEL7 application, or ADM809MAKS-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), push-pull drive capability (3.2 mA sink at VTH min), SC70-3 package compatibility, and guaranteed operation below 1.2 V VCC during brownout.
Technical Context
The ADM809MAKS-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 −40°C to +125°C, enabling reliable power-up sequencing even under fast VCC transients.
It features a push-pull RESET output that actively drives high and low without external components, unlike open-drain variants. The device asserts RESET when VCC falls below 4.38 V (typical) and holds it for ≥240 ms after VCC rises above threshold, ensuring microprocessor initialization stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V (typical), ±2.5% over −40°C to +125°C - ensures accurate 4.38 V rail monitoring without external calibration |
| Supply Current | 17 μA (typical at VCC < 3.6 V, −40°C to +85°C) - enables battery-backed and ultra-low-power system monitoring |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid reset assertion during deep brownout down to 1.0 V |
| Reset Timeout | 240 ms (typical), 140–460 ms (min/max over temperature) - guarantees sufficient processor hold time for stable boot |
| RESET Output Type | Push-pull active-low - eliminates need for external pull-up resistor and ensures defined logic levels |
| RESET Sink Current | 3.2 mA at VTH min - directly drives standard CMOS/TTL inputs without buffering |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
ADM809MAKS-REEL7 is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.9 mm, with gull-wing leads and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and RESET output; must be connected to system ground plane |
| 2 | RESET | Active-low push-pull output; sinks current when asserted, sources current when deasserted; compatible with 1.8 V–5 V logic |
| 3 | VCC | Monitored supply input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitor | 4.38 V threshold with ±2.5% tolerance over full temperature range - eliminates need for external trimming |
| Low quiescent current | 17 μA typical - extends battery life in portable and energy-harvesting systems |
| Brownout detection | Valid RESET assertion down to 1.0 V VCC - ensures fail-safe behavior during severe undervoltage |
| Glitch-immune comparator | Immune to transients ≤100 μs at 100 mV overdrive - prevents spurious resets on noisy rails |
| Industrial temperature grade | −40°C to +125°C operation - supports deployment in engine control units and motor drives |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 4.38 V auxiliary supply powering MCU and CAN transceiver in programmable logic controller cabinet. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to hold ARM Cortex-M4 in reset until 4.38 V rail stabilizes post-power-up. Use Value: Prevents firmware corruption by guaranteeing 240 ms minimum reset pulse, even during 12 V battery dip to 9 V. |
Use Scenario: Watches 4.38 V domain supplying door module microcontroller and LIN transceiver in vehicle interior network. IC Role / Device Role / Timing Role: Reset generator with push-pull output directly interfacing to MCU's nRST pin without pull-up resistor. Use Value: Enables reliable cold-cranking operation down to 1.0 V VCC, meeting ISO 16750-2 Pulse 4 requirement. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Secures safety-critical ARM-based pump controller powered from isolated 4.38 V DC-DC converter. IC Role / Device Role / Timing Role: Fault-tolerant supervisor providing brownout reset and power-fail warning via RESET assertion. Use Value: Glitch-immune comparator prevents false triggers from EMI-induced VCC noise during motor actuation. |
Use Scenario: Monitors 4.38 V rail feeding metrology ADC and secure MCU in ANSI C12.20-compliant meter. IC Role / Device Role / Timing Role: High-accuracy voltage monitor ensuring deterministic boot sequence after AC line interruption. Use Value: ±2.5% threshold tolerance over −40°C to +125°C eliminates recalibration across seasonal ambient shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM809MARTZ-REEL7 | SOT-23-3 package (RT-3), identical electrical specs and 4.38 V threshold | Requires PCB layout change due to larger 2.90 mm × 1.30 mm footprint vs. SC70's 2.00 mm × 1.25 mm | Select when SOT-23 is preferred for legacy board compatibility or thermal dissipation needs |
| MAX809TRD3T | 4.38 V threshold, but only rated −40°C to +85°C; 20 μA max supply current vs. 17 μA typ | Limited to commercial/industrial ambient; not suitable for under-hood or extended-temperature deployments | Choose only if operating temperature stays below 85°C and higher quiescent current is acceptable |
Compared with ADM809MAKS-REEL7, the SOT-23 variant offers identical functionality in a larger package, while the MAX809TRD3T trades temperature range and power efficiency for broader distributor availability - making ADM809MAKS-REEL7 optimal for space-constrained, high-reliability designs requiring full −40°C to +125°C operation.
Availability
ADM809MAKS-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809MAKS-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM809 series belongs to Analog Devices' microprocessor supervisory product line, designed specifically for robust power-monitoring in safety-critical embedded systems where deterministic reset timing and wide-temperature reliability are mandatory.
FAQ
What is the exact reset threshold voltage of ADM809MAKS-REEL7 and how does it vary with temperature?
The ADM809MAKS-REEL7 has a nominal reset threshold of 4.38 V at 25°C, with guaranteed limits of 4.25 V to 4.50 V over −40°C to +85°C and 4.20 V to 4.56 V over −40°C to +125°C. This ±2.5% tolerance ensures precise 4.38 V rail monitoring without external calibration across its full industrial temperature range.
Does ADM809MAKS-REEL7 require an external pull-up resistor on the RESET pin?
No, ADM809MAKS-REEL7 features a push-pull RESET output and does not require an external pull-up resistor. Its output actively drives high (≥0.8×VCC) and low (≤0.4 V at 3.2 mA sink) - unlike the open-drain ADM803, which mandates an external pull-up.
Can ADM809MAKS-REEL7 operate reliably during severe brownout conditions?
Yes, ADM809MAKS-REEL7 asserts RESET down to 1.0 V VCC and remains functional through brownouts as low as 1.0 V. Its internal circuitry continues monitoring and holding RESET active until VCC recovers above 4.38 V and sustains the 240 ms timeout - critical for fail-safe embedded systems.
What package type and dimensions does ADM809MAKS-REEL7 use?
ADM809MAKS-REEL7 uses the 3-lead SC70 (KS-3) package: 2.00 mm × 1.25 mm × 0.9 mm body size, 0.65 mm lead pitch, and gull-wing terminations. It complies with EIAJ SC70 standards and is optimized for high-density PCB layouts.
How does the reset timeout of ADM809MAKS-REEL7 behave across temperature?
The ADM809MAKS-REEL7 provides a typical 240 ms reset timeout, with guaranteed minimum of 140 ms and maximum of 460 ms over −40°C to +85°C. At 85°C to +125°C, the timeout range expands to 100–840 ms - ensuring robust boot timing across all operating conditions.
ADM809MAKS-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:
- 4.38V
- 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
ADM809MAKS-REEL7 FAQ
1.How can I place an order for ADM809MAKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809MAKS-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 ADM809MAKS-REEL7 reliable?
The price and inventory of ADM809MAKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809MAKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809MAKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809MAKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809MAKS-REEL7?
ADM809MAKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809MAKS-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 ADM809MAKS-REEL7?
For technical support, including ADM809MAKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809MAKS-REEL7 requirements.
6.How does Aetrix verify that ADM809MAKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809MAKS-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 ADM809MAKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809MAKS-REEL7?
All ADM809MAKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809MAKS-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 ADM809MAKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM809MAKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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