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Analog Devices Inc. ADM803TAKSZ-REEL
- Part No.:
- ADM803TAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM803TAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,699
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Product details
Overview
ADM803TAKSZ-REEL from Analog Devices is a microprocessor supervisory circuit with open-drain active-low RESET output, 3.08 V reset threshold, and SC70-3 package. It monitors VCC down to 1.0 V, asserts reset for 240 ms (typical) during power-up, and consumes only 17 μA at 3.3 V - enabling reliable reset generation in low-power embedded controllers and portable instrumentation.
For engineers reviewing the ADM803TAKSZ-REEL datasheet, ADM803TAKSZ-REEL pinout, ADM803TAKSZ-REEL application, or ADM803TAKSZ-REEL equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), guaranteed operation down to 1 V VCC, open-drain output requiring external pull-up, and SC70-3 footprint compatibility with space-constrained PCB layouts.
Technical Context
The ADM803TAKSZ-REEL implements a precision voltage comparator with internal 2.32 V reference and resistor divider network to achieve a nominal 3.08 V reset threshold. Its reset generator uses an RC-based timer to guarantee ≥140 ms minimum assertion time after VCC rises above threshold, with typical 240 ms timeout across temperature.
Designed for direct integration into microprocessor reset chains, it features built-in glitch immunity against fast VCC transients up to 100 V/μs and maintains valid logic-level RESET output even as VCC decays to 1.0 V - ensuring deterministic system initialization during brownout and power-down events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (nominal); ±2.5% tolerance over −40°C to +125°C ensures robust detection of 3.3 V supply droop before microprocessor malfunction. |
| Supply Voltage Range | 1.0 V to 5.5 V; enables operation during deep brownout and supports wide-input systems without auxiliary biasing. |
| Quiescent Current | 17 μA at VCC < 3.6 V; minimizes battery drain in always-on monitoring applications such as smart sensors and IoT edge nodes. |
| Reset Timeout | 240 ms typical; holds processor in reset long enough for clock stabilization and memory initialization in ARM Cortex-M and RISC-V SoCs. |
| Output Type | Open-drain active-low RESET; requires external pull-up but allows wired-OR configuration with multiple supervisors or interrupt sources. |
| Operating Temperature | −40°C to +125°C; qualified for under-hood automotive modules, industrial PLCs, and high-reliability medical equipment. |
Pinout & Package
ADM803TAKSZ-REEL 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. The package supports reflow soldering and provides thermal impedance of 146°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be connected directly to system ground plane for noise immunity. |
| 2 | RESET | Open-drain active-low output; sinks current when asserted; requires external pull-up resistor (typically 10 kΩ to VCC or higher rail). |
| 3 | VCC | Monitored supply input; powers internal circuitry and defines reset threshold via internal resistor divider. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08 V with ±2.5% max deviation over full temperature range - eliminates need for external trimming in 3.3 V systems. |
| Ultra-low supply current | 17 μA typical at 3.3 V - extends battery life in coin-cell-powered devices beyond 10 years in sleep mode. |
| Brownout detection down to 1 V | Guaranteed RESET assertion until VCC ≥ 1.0 V - prevents spurious execution during catastrophic supply collapse. |
| Glitch-immune comparator | Immune to transients ≤ 100 V/μs on VCC - avoids false resets caused by switching noise or ESD coupling. |
| SC70-3 footprint | 2.0 mm × 1.25 mm body size - saves >60% board area versus SOT-23-3 while maintaining hand-solderability. |
Applications
| Industrial PLC Controller | Portable Medical Sensor |
|---|---|
Use Scenario: Monitors 3.3 V I/O supply in modular PLC backplane where voltage sags occur during hot-swap insertion. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM-based controller until supply stabilizes post-insertion. Use Value: 240 ms timeout prevents firmware crash during transient undervoltage; 1 V operating limit ensures reset remains valid even during worst-case sag. | Use Scenario: Embedded in wearable ECG patch with CR2032 battery powering ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary reset supervisor generating clean power-on reset signal synchronized to battery voltage rise. Use Value: 17 μA quiescent current contributes <0.05% of total standby draw; open-drain output enables shared reset bus with other subsystems. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Installed in BCM subassembly exposed to −40°C to +125°C ambient, monitoring 3.3 V CAN transceiver supply. IC Role / Device Role / Timing Role: Temperature-stable reset source ensuring microcontroller enters safe state during cold cranking voltage dip. Use Value: ±2.5% threshold tolerance over full temp range guarantees consistent trip point without calibration; SC70 package withstands thermal cycling stress. | Use Scenario: Used in DIN-rail mounted meter with isolated 3.3 V auxiliary supply derived from mains transformer. IC Role / Device Role / Timing Role: Fault-tolerant reset generator that remains functional during brief AC line interruptions. Use Value: Glitch immunity prevents false resets from switching regulator ripple; 140–460 ms timeout window accommodates variable supply ramp rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TTR+T | 3.08 V threshold, SOT-23-3 package, push-pull output, 20 μA supply current | Requires no external pull-up; incompatible with wired-OR reset buses | Select when board layout lacks space for pull-up resistor or when driving CMOS inputs directly. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), SOT-23-6 package, adjustable delay, 1.1 μA typical supply current | Higher accuracy and lower power, but larger footprint and different pinout | Select when tighter threshold tolerance (<±1%) or nanoscale power budget dominates design priorities. |
Compared with MAX809TTR+T and TPS3808G30DBVR, the ADM803TAKSZ-REEL uniquely combines SC70-3 miniaturization, open-drain flexibility, and guaranteed 1 V operation - making it optimal for space-constrained, multi-source reset architectures in harsh environments.
Availability
ADM803TAKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM803TAKSZ-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 ADM803 series belongs to Analog Devices' precision supervisory IC product line, engineered specifically for deterministic power-on reset generation in resource-constrained microprocessor systems where reliability, low power, and small size are critical.
FAQ
What is the exact reset threshold voltage of the ADM803TAKSZ-REEL?
The ADM803TAKSZ-REEL has a nominal reset threshold voltage of 3.08 V, with guaranteed limits of 3.00 V (min) to 3.15 V (max) over the −40°C to +85°C temperature range, and 2.95 V to 3.21 V over −40°C to +125°C per Table 1 of the datasheet. This matches the "T" variant designation in the ADM803 family ordering guide.
Does the ADM803TAKSZ-REEL require an external pull-up resistor on the RESET pin?
Yes, the ADM803TAKSZ-REEL features an open-drain RESET output and requires an external pull-up resistor to a valid logic-high voltage rail. Typical values range from 4.7 kΩ to 100 kΩ depending on bus capacitance and drive strength requirements; Analog Devices recommends 10 kΩ for general-purpose use.
Can the ADM803TAKSZ-REEL operate when the supply voltage drops below 2.0 V?
Yes, the ADM803TAKSZ-REEL is fully specified to operate down to 1.0 V VCC. Its internal comparator and timer remain functional, and the RESET output stays asserted (low) until VCC rises above the 3.08 V threshold - ensuring fail-safe behavior during severe brownout conditions.
What is the package type and lead count of the ADM803TAKSZ-REEL?
The ADM803TAKSZ-REEL is packaged in a 3-lead SC70 (JEDEC KS-3) outline, with dimensions of 2.00 mm × 1.25 mm × 0.9 mm. Pin 1 is GND, Pin 2 is RESET (open-drain), and Pin 3 is VCC - matching the pin configuration shown in Figure 3 of the ADM803/ADM809/ADM810 datasheet Rev. I.
How does the reset timeout of the ADM803TAKSZ-REEL behave across temperature?
The ADM803TAKSZ-REEL guarantees a minimum reset timeout of 140 ms and maximum of 460 ms over −40°C to +85°C, with typical value of 240 ms. At elevated temperatures (85°C to 125°C), the timeout range widens to 100 ms to 840 ms due to process variation, as specified in the "RESET ACTIVE TIMEOUT PERIOD" row of Table 1.
ADM803TAKSZ-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:
- 3.08V
- Output:
- Open Drain or Open Collector
- 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
ADM803TAKSZ-REEL FAQ
1.How can I place an order for ADM803TAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM803TAKSZ-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 ADM803TAKSZ-REEL reliable?
The price and inventory of ADM803TAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM803TAKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM803TAKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM803TAKSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM803TAKSZ-REEL?
ADM803TAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM803TAKSZ-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 ADM803TAKSZ-REEL?
For technical support, including ADM803TAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM803TAKSZ-REEL requirements.
6.How does Aetrix verify that ADM803TAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM803TAKSZ-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 ADM803TAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM803TAKSZ-REEL?
All ADM803TAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM803TAKSZ-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 ADM803TAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM803TAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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