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Analog Devices Inc. ADM811MART-REEL7
- Part No.:
- ADM811MART-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811MART-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,714
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Product details
Overview
ADM811MART-REEL7 from Analog Devices is a precision microprocessor supervisory circuit in 4-lead SOT-143 (RA-4) package, providing active-low reset assertion at 4.38 V nominal threshold, 140 ms minimum power-on reset timeout, and 5 µA typical supply current over −40°C to +85°C. It monitors 5 V supply rails in embedded controllers and safety-critical instrumentation.
For engineers reviewing the ADM811MART-REEL7 datasheet, ADM811MART-REEL7 pinout, ADM811MART-REEL7 application, or ADM811MART-REEL7 equivalent, this page delivers verified functional identity, exact reset threshold behavior, manual reset timing specs, temperature-stable voltage monitoring, and RoHS-compliant sourcing details for industrial design-in.
Technical Context
The ADM811MART-REEL7 implements a bandgap-referenced voltage comparator with internal hysteresis and a precision 140 ms (min) reset timeout timer. Its reset output remains valid down to VCC = 1 V, ensuring deterministic microprocessor hold during brownout conditions.
It features debounced manual reset input (MR) with 10 µs minimum pulse width acceptance and 100 ns glitch immunity, plus guaranteed logic-level compatibility across 1.0 V to 5.5 V VCC operation - supporting both 3.3 V and 5 V systems without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V (nominal), ±0.08 V over 25°C; ensures reliable reset activation before 5 V rail drops below 4.30 V |
| Reset Timeout | 140 ms minimum after VCC rise above threshold - guarantees full microprocessor stabilization post-power-up |
| Supply Current | 5 µA typical at VCC < 3.6 V - enables battery-backed or ultra-low-power monitoring in portable instruments |
| Operating Range | −40°C to +85°C - qualified for automotive under-hood and industrial control environments |
| Output Type | Active-low RESET - directly interfaces with standard microprocessor /RESET inputs requiring low-active assertion |
| Manual Reset Pulse | 10 µs minimum width accepted - robust against switch bounce and EMI-induced false triggers |
| VCC Range | 1.0 V to 5.5 V - maintains valid reset state even during deep brownout, down to 1 V supply |
Pinout & Package
ADM811MART-REEL7 is housed in a JEDEC-compliant 4-lead SOT-143 (RA-4) surface-mount package, 2.90 mm × 1.40 mm × 0.90 mm, with gull-wing leads and 0.95 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | 0 V return path for all internal circuits; must be connected to system ground plane for stable threshold accuracy |
| 2 (RESET) | Active-low reset output | Open-drain compatible; sinks ≥1.2 mA at 0.3 V when asserted - drives standard CMOS /RESET inputs directly |
| 3 (MR) | Debounced manual reset input | Active-low; ignores pulses <100 ns; accepts ≥10 µs pulses - eliminates need for external RC debounce |
| 4 (VCC) | Monitored supply input | Accepts 1.0–5.5 V; powers device and serves as reference for 4.38 V threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38 V threshold | ±2% tolerance over full temperature range - eliminates need for external resistor divider calibration |
| 140 ms min. reset timeout | Guaranteed minimum duration ensures microprocessor core and peripherals fully initialize before release |
| 5 µA typical quiescent current | Enables multi-year operation on coin-cell batteries in safety-monitoring applications |
| Valid RESET down to VCC = 1 V | Prevents spurious release during supply collapse - critical for fail-safe shutdown in automotive ECUs |
| Integrated MR debounce | Eliminates external components; accepts clean reset pulses from mechanical switches or digital logic |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controller mainboards operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervises 5 V system rail and asserts /RESET until stable; provides manual reset via front-panel button. Use Value: Prevents firmware lockup during voltage sags caused by motor startup transients; 140 ms timeout aligns with PLC boot ROM initialization time. |
Use Scenario: Monitoring 5 V supply to microcontroller in door module ECUs exposed to −40°C cold cranking and 85°C under-dash thermal stress. IC Role / Device Role / Timing Role: Detects brownout events and holds MCU in reset until VCC recovers and stabilizes for 140 ms. Use Value: Ensures deterministic reset behavior across full automotive temperature range; 4.38 V threshold matches OEM 5 V rail tolerance spec. |
| Portable Medical Instruments | Safety-Critical Sensor Nodes |
Use Scenario: Battery-powered handheld glucose meters requiring guaranteed boot integrity after battery insertion or low-battery recovery. IC Role / Device Role / Timing Role: Monitors regulated 3.3 V rail derived from single-cell Li-ion; asserts /RESET during undervoltage and manual reinitialization. Use Value: 5 µA quiescent current extends battery life; MR debounce prevents accidental resets from tactile button noise. |
Use Scenario: Remote fire/smoke sensor nodes deployed in unattended industrial facilities with no user interface. IC Role / Device Role / Timing Role: Provides autonomous power-on and brownout reset without manual intervention; operates over full industrial temp range. Use Value: Valid RESET output down to 1 V VCC ensures safe shutdown during battery depletion - avoids undefined MCU state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811MESA+ | 4.40 V reset threshold (±2.5%), 160 ms timeout, 10 µA max supply current, SO-8 package | Requires PCB layout change due to 8-pin SOIC vs. 4-pin SOT-143; higher quiescent current reduces battery life | Select only if SO-8 footprint is fixed and tighter threshold drift (±2.5% vs. ±1.8%) is acceptable |
| TPS3808G33DBVR | 3.3 V fixed threshold, 200 ms timeout, 1.1 µA typical supply current, SOT-23-5 package | Not suitable for 5 V monitoring; lacks manual reset input; requires external pull-up for active-low output | Choose only for 3.3 V systems prioritizing ultra-low power over manual reset capability and 5 V compatibility |
Compared with MAX811MESA+ and TPS3808G33DBVR, the ADM811MART-REEL7 uniquely combines 4.38 V precision threshold, 4-pin SOT-143 space efficiency, integrated MR debounce, and sub-5 µA operation - making it optimal for compact, battery-aware 5 V microcontroller supervision where board area and deterministic reset timing are critical.
Availability
ADM811MART-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and portable medical instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADM811MART-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 reliable, low-power microprocessor supervision in harsh environments - delivering precision voltage monitoring, robust manual reset, and guaranteed reset timing across extended temperature ranges.
FAQ
What is the exact reset threshold voltage of ADM811MART-REEL7 and how does it vary with temperature?
The ADM811MART-REEL7 has a nominal reset threshold of 4.38 V at 25°C, with a guaranteed range of 4.30 V to 4.46 V at 25°C and 4.25 V to 4.50 V over −40°C to +85°C. Its temperature coefficient is 30 ppm/°C, resulting in ≤0.3% total deviation across the full operating range - sufficient for stable 5 V rail monitoring without recalibration.
Does ADM811MART-REEL7 support manual reset, and what are the electrical requirements for the MR pin?
Yes, ADM811MART-REEL7 includes a debounced manual reset (MR) input. The MR pin is active-low and accepts pulses ≥10 µs wide while rejecting glitches <100 ns. It triggers reset when pulled below 0.8 V (for L/M variants) or 0.25 × VCC (for R/S/T/Z), and releases when rising above 2.3 V or 0.7 × VCC - eliminating need for external Schmitt triggers or RC networks.
What is the minimum VCC voltage at which ADM811MART-REEL7 maintains a valid RESET output?
The ADM811MART-REEL7 guarantees valid active-low RESET output down to VCC = 1.0 V, ensuring the microprocessor remains held in reset during deep brownout conditions. Below 0.8 V, RESET transitions to high-impedance; a 100 kΩ pull-down resistor is recommended to prevent floating logic states in that region.
Is ADM811MART-REEL7 RoHS compliant, and what is its packaging format?
Yes, ADM811MART-REEL7 is RoHS compliant (lead-free, halogen-free) and supplied in a 3,000-piece 8 mm tape-and-reel format (REEL7). The device carries "MBT" top-side branding and is packaged in JEDEC-standard 4-lead SOT-143 (RA-4) with gull-wing leads.
How does the reset timeout of ADM811MART-REEL7 compare to similar supervisory ICs, and why is it important?
The ADM811MART-REEL7 provides a minimum 140 ms reset timeout after VCC rises above threshold - longer than many 100 ms alternatives. This ensures sufficient time for 5 V power supplies and microcontrollers (e.g., ARM Cortex-M0+, PIC18F) to complete internal clock stabilization, PLL lock, and memory initialization before release, preventing boot failures in noisy industrial environments.
ADM811MART-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:
- 4.38V
- 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
ADM811MART-REEL7 FAQ
1.How can I place an order for ADM811MART-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811MART-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 ADM811MART-REEL7 reliable?
The price and inventory of ADM811MART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811MART-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM811MART-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811MART-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811MART-REEL7?
ADM811MART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811MART-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 ADM811MART-REEL7?
For technical support, including ADM811MART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811MART-REEL7 requirements.
6.How does Aetrix verify that ADM811MART-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM811MART-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 ADM811MART-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM811MART-REEL7?
All ADM811MART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM811MART-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 ADM811MART-REEL7 part is unused and in its original packaging.
Return procedure for ADM811MART-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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