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Analog Devices Inc. ADM811-3TART-REEL7
- Part No.:
- ADM811-3TART-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811-3TART-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,347
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Product details
Overview
ADM811-3TART-REEL7 from Analog Devices is a microprocessor supervisory circuit in 4-lead SOT-143 package, providing active-low reset assertion at 3.08 V threshold with ±5% tolerance over −40°C to +85°C, 140 ms minimum power-on reset timeout, and 5 µA typical supply current. It monitors 3.3 V supply rails in embedded controllers and safety-critical instrumentation.
For engineers reviewing the ADM811-3TART-REEL7 datasheet, ADM811-3TART-REEL7 pinout, ADM811-3TART-REEL7 application, or ADM811-3TART-REEL7 equivalent, this page delivers verified reset threshold accuracy, manual reset debounce timing, low-voltage reset validity down to 1 VCC, and SOT-143 thermal performance data for reliable system-level power sequencing design.
Technical Context
The ADM811-3TART-REEL7 implements a precision bandgap voltage reference with 30 ppm/°C temperature coefficient to maintain 3.08 V reset threshold stability across industrial temperature range. Its internal reset generator holds RESET low for ≥140 ms after VCC exceeds threshold and supports valid output down to VCC = 1 V.
Manual reset input (MR) features 10 µs minimum pulse width acceptance and 100 ns glitch immunity, with logic thresholds defined as rising above 0.7 × VCC and falling below 0.25 × VCC. The active-low RESET output sinks 1.2 mA at 0.3 V with VCC = VTH(MIN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V nominal, ±5% over −40°C to +85°C - ensures reliable detection of 3.3 V rail brownout before microprocessor malfunction. |
| Reset Timeout | 140 ms minimum on power-up - provides sufficient stabilization time for 3.3 V-powered microcontrollers and peripherals. |
| Supply Current | 5 µA typical at VCC < 3.6 V - enables battery-backed or ultra-low-power systems without compromising supervision integrity. |
| Operating Range | 1.2 V to 5.5 V supply - supports valid reset assertion during deep brownout conditions down to 1.2 V at full temperature range. |
| Output Type | Active-low open-drain RESET - interfaces directly with CMOS/TTL microprocessor reset inputs requiring pull-up. |
| Manual Reset | Debounced MR input with 10 µs minimum pulse width - eliminates switch bounce and EMI-induced false resets in noisy environments. |
| Temperature Coefficient | 30 ppm/°C - limits threshold drift to ±15 mV over full −40°C to +85°C range, critical for automotive and industrial reliability. |
Pinout & Package
ADM811-3TART-REEL7 uses a JEDEC-compliant 4-lead SOT-143 (RA-4) package with 1.92 mm body width, 1.40 mm height, and 0.90 mm lead pitch. Thermal impedance θJA = 330°C/W supports operation up to +85°C ambient without heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground Reference | 0 V reference for all internal comparators and reset logic; must be connected to system ground plane with low-inductance path. |
| 2 RESET | Active-Low Reset Output | Open-drain output asserted low during VCC undervoltage or MR assertion; requires external pull-up to VCC or host logic rail. |
| 3 MR | Manual Reset Input | Active-low debounced input; accepts pulses ≥10 µs; ignores transients ≤100 ns; floats high when unused. |
| 4 VCC | Monitored Supply Voltage | Input for 3.3 V nominal rail monitoring; internal reference tracks VCC to enable accurate threshold scaling across voltage variants. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | Guaranteed ±5% tolerance over −40°C to +85°C enables robust 3.3 V system supervision without calibration. |
| Low 5 µA quiescent current | Reduces standby power in always-on safety monitors and battery-buffered controllers without sacrificing response speed. |
| Valid RESET down to 1 VCC | Ensures microprocessor remains held in reset during complete power collapse, preventing undefined state transitions. |
| 10 µs MR pulse acceptance | Supports mechanical pushbutton reset with minimal external filtering, reducing BOM count in cost-sensitive designs. |
| 30 ppm/°C tempco | Minimizes threshold drift in under-hood automotive or industrial enclosures where ambient swings exceed 100°C. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Supervising 3.3 V microcontroller supply in programmable logic controllers exposed to wide ambient temperature swings and electrical noise. IC Role / Device Role / Timing Role: Voltage monitor and power-on reset generator ensuring deterministic boot sequence after line voltage recovery. Use Value: 140 ms fixed reset timeout prevents premature CPU execution before I/O drivers stabilize; 30 ppm/°C threshold stability avoids false resets at −40°C cold start. |
Use Scenario: Monitoring 3.3 V domain powering CAN transceivers and sensor interfaces in vehicle door modules. IC Role / Device Role / Timing Role: Active-low reset supervisor with manual override for field-service diagnostics and firmware recovery. Use Value: Valid RESET output down to 1 VCC guarantees safe shutdown during battery voltage sag; MR debounce rejects ignition-switch EMI. |
| Medical Patient Monitor Front-End | Railway Signaling Interface Units |
Use Scenario: Ensuring fail-safe reset of ARM-based data acquisition subsystems in portable diagnostic equipment. IC Role / Device Role / Timing Role: Precision voltage supervisor with guaranteed reset assertion during AC/DC converter brownout events. Use Value: 3.08 V threshold matches 3.3 V LDO tolerance stack-up; 5 µA supply current extends battery life in Class II medical devices. |
Use Scenario: Supervising 3.3 V FPGA configuration supply in EN 5012x-certified signaling hardware operating in rail yards. IC Role / Device Role / Timing Role: Industrial-grade reset generator meeting IEC 61000-4-4 surge immunity requirements via internal glitch filtering. Use Value: 100 ns glitch immunity suppresses fast transients from nearby relay switching; SOT-143 package supports conformal coating for humidity resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TUR+T | 3.08 V threshold, same SOT-143 package, but 20 µA max supply current vs. 15 µA max for ADM811-3TART-REEL7; no guaranteed 1 VCC reset validity. | Less suitable for battery-backed systems requiring sub-10 µA standby; lacks specified operation below 1.2 VCC. | Select ADM811-3TART-REEL7 when 1 VCC reset validity or lower quiescent current is required for long-life deployments. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), 1.5 µA typical supply current, but 6-pin SOT-23 package; no manual reset input. | Requires PCB redesign due to different footprint and pin count; lacks MR functionality needed for field serviceability. | Choose ADM811-3TART-REEL7 when manual reset capability and SOT-143 compatibility are mandatory for legacy board reuse. |
Compared with MAX811TUR+T and TPS3808G30DBVR, ADM811-3TART-REEL7 uniquely combines 3.08 V precision threshold, SOT-143 pinout, active-low reset, manual reset input, and guaranteed reset validity down to 1 VCC-making it optimal for space-constrained industrial and automotive controllers needing field-service reset and deep-brownout immunity.
Availability
ADM811-3TART-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical patient monitor front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM811-3TART-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 ADM811/ADM812 family was designed specifically for microprocessor supervisory functions in harsh environments, delivering precision voltage monitoring, robust reset timing, and manual reset capability in minimal-footprint packages.
FAQ
What is the exact reset threshold voltage for ADM811-3TART-REEL7?
The ADM811-3TART-REEL7 has a nominal reset threshold of 3.08 V, with guaranteed range of 3.00 V to 3.15 V over the full −40°C to +85°C operating temperature range. This value is confirmed in Table 4 and the Ordering Guide of the Rev. H datasheet, and applies specifically to the ADM811-3TART-REEL7 variant with "3T" suffix.
Does ADM811-3TART-REEL7 support manual reset functionality?
Yes, ADM811-3TART-REEL7 includes a debounced manual reset (MR) input that accepts active-low pulses ≥10 µs and rejects glitches ≤100 ns. The MR pin (Pin 3) is internally pulled up, so it may be left floating when unused. This feature is explicitly documented in the Pin Function Descriptions and Circuit Information sections of the datasheet.
What is the minimum supply voltage at which ADM811-3TART-REEL7 maintains valid reset output?
ADM811-3TART-REEL7 guarantees valid active-low RESET output down to VCC = 1.0 V at −40°C to +85°C, as stated in the Absolute Maximum Ratings table and confirmed in the General Description and Circuit Information sections. Below 1.0 V, RESET behavior is not specified.
Is ADM811-3TART-REEL7 pin-compatible with other ADM811 variants?
Yes, all ADM811 variants-including ADM811-3TART-REEL7-use identical 4-lead SOT-143 (RA-4) packaging and share identical pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. This is confirmed in Figure 3 (Pin Configuration) and Table 3 (Pin Function Descriptions) of the datasheet.
What is the power-on reset timeout duration for ADM811-3TART-REEL7?
The ADM811-3TART-REEL7 provides a minimum power-on reset timeout of 140 ms after VCC rises above the 3.08 V threshold. This value is specified in the "RESET ACTIVE TIMEOUT PERIOD" row of Table 1 and applies to all ADM811T/ADM812T variants, including ADM811-3TART-REEL7.
ADM811-3TART-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- 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:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
ADM811-3TART-REEL7 FAQ
1.How can I place an order for ADM811-3TART-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811-3TART-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 ADM811-3TART-REEL7 reliable?
The price and inventory of ADM811-3TART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811-3TART-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM811-3TART-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811-3TART-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811-3TART-REEL7?
ADM811-3TART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811-3TART-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 ADM811-3TART-REEL7?
For technical support, including ADM811-3TART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811-3TART-REEL7 requirements.
6.How does Aetrix verify that ADM811-3TART-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM811-3TART-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 ADM811-3TART-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM811-3TART-REEL7?
All ADM811-3TART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM811-3TART-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 ADM811-3TART-REEL7 part is unused and in its original packaging.
Return procedure for ADM811-3TART-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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