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Analog Devices Inc. ADM809RAKS-REEL
- Part No.:
- ADM809RAKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809RAKS-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,128
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Product details
Overview
ADM809RAKS-REEL from Analog Devices is a microprocessor supervisory circuit in 3-lead SC70 package, providing push-pull active-low reset output with 2.63 V threshold, 240 ms typical reset timeout, and operation down to 1 V VCC. It monitors supply voltage in embedded controllers and ensures reliable power-on reset for industrial microprocessor systems.
For engineers reviewing the ADM809RAKS-REEL datasheet, ADM809RAKS-REEL pinout, ADM809RAKS-REEL application, or ADM809RAKS-REEL equivalent, key selection criteria include reset threshold accuracy (±2.7% over −40°C to +125°C), low 17 μA supply current, push-pull output drive capability, SC70 footprint compatibility, and guaranteed reset assertion during brownout conditions.
Technical Context
The ADM809RAKS-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reset threshold is trimmed to 2.63 V at 25°C with ±2.7% variation across −40°C to +125°C and 30 ppm/°C temperature coefficient.
It features a push-pull RESET output capable of sinking 1.2 mA at 0.3 V (VCC = VTH min) and sourcing 500 μA at 0.8×VCC, enabling direct interface with CMOS logic without external pull-up. The device remains functional with VCC as low as 1.0 V, supporting robust brownout detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V nominal at 25°C; ±2.7% tolerance over −40°C to +125°C - ensures accurate reset assertion for 2.7 V–3.0 V supply rails. |
| Reset Timeout | 240 ms typical after VCC rises above threshold - holds microprocessor in reset long enough for power stabilization. | Supply Current | 17 μA typical at VCC < 3.6 V and TA = −40°C to +85°C - enables use in battery-powered and ultra-low-power systems. |
| VCC Operating Range | 1.0 V to 5.5 V - supports reset monitoring during deep brownout and across 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5 V supply domains. |
| Output Type | Push-pull active-low RESET - eliminates need for external pull-up resistor and provides defined logic levels under all operating conditions. |
| Temperature Range | −40°C to +125°C - qualified for automotive under-hood, industrial control, and harsh-environment applications. |
| Package | 3-lead SC70 (KS-3) - 2.0 mm × 1.25 mm footprint, compatible with high-density PCB layouts and reflow assembly. |
Pinout & Package
ADM809RAKS-REEL uses a 3-lead SC70 (KS-3) package with 0.65 mm pitch, 2.0 mm × 1.25 mm body size, and 0.10 mm max coplanarity per JEDEC SC70 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected to system ground plane for stable reset timing. |
| 2 | RESET | Active-low push-pull output; drives low during reset (VCC < 2.63 V) and high when deasserted; sinks ≥1.2 mA, sources ≥500 μA. |
| 3 | VCC | Supply voltage input being monitored; powers internal circuitry and defines output high level; operates from 1.0 V to 5.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.63 V with ±2.7% tolerance over full temperature range - eliminates need for external trimming in 2.7 V rail monitoring. |
| Glitch-immune comparator | Built-in immunity to fast transients on VCC up to 100 mV overdrive - prevents false resets during switching noise or ESD events. |
| Low-voltage operation | Functional reset assertion down to 1.0 V VCC - ensures reliable brownout detection even during severe supply sag. |
| Ultra-low quiescent current | 17 μA typical - extends battery life in portable instrumentation and reduces self-heating in sealed enclosures. |
| SC70 footprint | 2.0 mm × 1.25 mm, 0.65 mm pitch - enables compact placement near microcontroller power pins without sacrificing thermal performance. |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Monitors 2.7 V backup supply in programmable logic controller I/O modules during AC mains failure. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M4 until 2.7 V rail stabilizes post-failover. Use Value: 240 ms timeout and 2.63 V threshold ensure deterministic restart after brownout without firmware intervention. | Use Scenario: Validates 3.0 V Li-ion battery output before enabling FPGA-based image processing pipeline. IC Role / Device Role / Timing Role: Voltage monitor generating clean reset pulse to prevent partial configuration of SRAM-based FPGA during low-battery boot. Use Value: 17 μA supply current minimizes standby drain; 1.0 V operational floor allows reset assertion even during deep discharge. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Watches 2.8 V CAN transceiver supply in door module exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Reset generator holding microcontroller in reset during 12 V battery dip below 9 V, using 2.63 V threshold scaled for 2.8 V rail. Use Value: −40°C to +125°C rating and 30 ppm/°C tempco guarantee timing stability across engine bay thermal cycles. | Use Scenario: Secures meter MCU boot sequence by validating 2.5 V LDO output derived from 3.3 V main rail. IC Role / Device Role / Timing Role: Precision supervisor ensuring no code execution occurs until 2.5 V rail reaches 99% of target with 240 ms hold time. Use Value: Push-pull output drives meter's isolated reset line directly - no pull-up required, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809RTR | 2.63 V threshold, SOT-23-3 package, 140 ms min reset timeout, 1.2 V min VCC | Lacks guaranteed operation below 1.2 V; lower temperature grade (−40°C to +85°C only) | Choose for cost-sensitive consumer designs where extended temperature range is not required. |
| TPS3808G12QDBVRQ1 | 2.63 V threshold, SOT-23-6 package, adjustable delay, 1.2 V min VCC, AEC-Q100 Grade 1 | Requires external capacitor for delay setting; larger footprint; automotive-qualified but higher quiescent current (2.5 μA vs 17 μA) | Choose when AEC-Q100 qualification is mandatory and adjustable timeout is needed. |
Compared with MAX809RTR and TPS3808G12QDBVRQ1, ADM809RAKS-REEL delivers superior low-voltage operation (1.0 V vs 1.2 V), tighter temperature specification (−40°C to +125°C), and lower supply current - making it optimal for high-reliability industrial and extended-temperature embedded systems where minimal BOM count and SC70 space savings are critical.
Availability
ADM809RAKS-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 ranges and long production lifecycles.
Supply support for ADM809RAKS-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 series belongs to Analog Devices' precision supervisory IC product line, designed specifically for reliable power-on reset, brownout protection, and supply voltage monitoring in resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of ADM809RAKS-REEL and how does it vary with temperature?
The ADM809RAKS-REEL has a nominal reset threshold of 2.63 V at 25°C, with a guaranteed range of 2.52 V to 2.74 V over −40°C to +125°C. Its temperature coefficient is 30 ppm/°C, meaning threshold drift is ≤±0.0079 V across the full range. This precision enables accurate monitoring of 2.7 V supply rails without external calibration, and the ADM809RAKS-REEL maintains this performance in automotive and industrial environments where ambient temperature swings are extreme.
Does ADM809RAKS-REEL support operation below 1.8 V, and what happens to the RESET output at low VCC?
Yes, ADM809RAKS-REEL operates down to 1.0 V VCC and asserts RESET (drives low) as long as VCC remains below 2.63 V. At VCC < 0.8 V, the output enters high-impedance state; however, the ADM809RAKS-REEL guarantees valid RESET assertion down to 1.0 V, unlike many competitors that cease functioning below 1.2 V. This ensures robust brownout detection in battery-powered systems nearing end-of-life, and the ADM809RAKS-REEL's push-pull architecture maintains defined logic levels throughout its operational range.
What is the package type and footprint of ADM809RAKS-REEL, and is it compatible with automated assembly?
ADM809RAKS-REEL uses a 3-lead SC70 (KS-3) package measuring 2.0 mm × 1.25 mm with 0.65 mm lead pitch, fully compliant with JEDEC SC70 standards. Its gull-wing leads and 0.10 mm max coplanarity support standard reflow soldering processes including wave and selective soldering. The ADM809RAKS-REEL's small footprint reduces PCB area by ~40% versus SOT-23 equivalents, and its RoHS-compliant construction (Z suffix) meets IPC-J-STD-020 moisture sensitivity level 1 requirements for unlimited floor life.
How does the reset timeout of ADM809RAKS-REEL behave across temperature, and is it factory-trimmed?
The ADM809RAKS-REEL features a factory-trimmed internal timer delivering 240 ms typical reset timeout after VCC rises above threshold, with guaranteed minimum of 140 ms and maximum of 460 ms over −40°C to +85°C. At 85°C to 125°C, timeout ranges from 100 ms to 840 ms. This variation is inherent to RC-based timing and is fully characterized in the datasheet - the ADM809RAKS-REEL does not require external components to set delay, simplifying design and improving reliability compared to adjustable supervisors.
Can ADM809RAKS-REEL replace ADM809RART-REEL, and what are the key mechanical differences?
ADM809RAKS-REEL and ADM809RART-REEL share identical electrical specifications (2.63 V threshold, push-pull output, −40°C to +125°C), but differ in package: ADM809RAKS-REEL uses SC70 (KS-3), while ADM809RART-REEL uses SOT-23 (RT-3). The SC70 is 2.0 mm × 1.25 mm vs SOT-23's 2.9 mm × 1.3 mm - a 42% smaller footprint. No PCB redesign is needed if migrating from SOT-23 to SC70 only if layout accommodates the smaller pad geometry; the ADM809RAKS-REEL requires updated stencil and placement files due to pitch and body size differences.
ADM809RAKS-REEL 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:
- 2.63V
- 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
ADM809RAKS-REEL FAQ
1.How can I place an order for ADM809RAKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809RAKS-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 ADM809RAKS-REEL reliable?
The price and inventory of ADM809RAKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809RAKS-REEL is usually 5 days.
3.What payment methods are accepted for ADM809RAKS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809RAKS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809RAKS-REEL?
ADM809RAKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809RAKS-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 ADM809RAKS-REEL?
For technical support, including ADM809RAKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809RAKS-REEL requirements.
6.How does Aetrix verify that ADM809RAKS-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809RAKS-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 ADM809RAKS-REEL meets industry standards.
7.What is the process for return or replacement of ADM809RAKS-REEL?
All ADM809RAKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809RAKS-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 ADM809RAKS-REEL part is unused and in its original packaging.
Return procedure for ADM809RAKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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