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Analog Devices Inc. ADM811MARTZ-REEL7
- Part No.:
- ADM811MARTZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM811MARTZ-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:27,589
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Product details
Overview
ADM811MARTZ-REEL7 from Analog Devices is a precision microprocessor supervisory circuit in 4-lead SOT-143 (RA-4) package, providing active-low reset output with 4.38 V threshold, 140 ms minimum reset timeout, and operation down to 1.0 V VCC. It monitors 5 V supply rails in embedded controllers and automotive ECUs where reliable power-on and brownout reset is critical.
For engineers reviewing the ADM811MARTZ-REEL7 datasheet, ADM811MARTZ-REEL7 pinout, ADM811MARTZ-REEL7 application, or ADM811MARTZ-REEL7 equivalent, this page delivers verified electrical parameters, manual reset timing behavior, temperature-stable threshold accuracy (±0.15 V over −40°C to +85°C), low 5 μA typical supply current, and RoHS-compliant SOT-143 packaging for space-constrained PCBs.
Technical Context
The ADM811MARTZ-REEL7 integrates a precision bandgap voltage reference, comparator, debounced manual reset input, and internal timer to generate a guaranteed minimum 140 ms active-low RESET pulse after VCC rises above 4.38 V. Its reset assertion remains valid down to VCC = 1.0 V, ensuring deterministic microprocessor hold during power collapse.
It features 30 ppm/°C temperature coefficient on reset threshold, 10 μs minimum manual reset pulse width acceptance, and 100 ns glitch immunity on MR input-enabling robust operation in electrically noisy automotive and industrial environments without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V nominal at 25°C; ±0.15 V over −40°C to +85°C - ensures stable reset activation across full industrial temperature range |
| Reset Timeout | 140 ms minimum after VCC rise - guarantees sufficient processor stabilization time before release |
| Supply Current | 5 μA typical at VCC < 3.6 V - enables ultra-low-power operation in battery-backed systems |
| VCC Range | 1.0 V to 5.5 V - supports valid RESET output even during deep brownout down to 1 V |
| Manual Reset Pulse Width | ≥10 μs required - rejects switch bounce and EMI transients while accepting deliberate user reset |
| Reset Output Type | Active-low open-drain - compatible with 3 V/5 V logic families and allows wired-OR configuration |
| Temperature Coefficient | 30 ppm/°C - limits threshold drift to <0.04 V over full operating range |
Pinout & Package
ADM811MARTZ-REEL7 uses the JEDEC-compliant 4-lead SOT-143 (RA-4) package, measuring 2.90 mm × 1.30 mm × 1.07 mm, with gull-wing leads and exposed pad not present. Pin 1 is GND, Pin 2 is RESET (active-low), Pin 3 is MR (manual reset, active-low), Pin 4 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for all internal circuits and reset output sink current |
| RESET (Pin 2) | Active-low reset output | Open-drain output held low during reset; requires external pull-up; valid down to VCC = 1 V |
| MR (Pin 3) | Debounced manual reset input | Active-low input rejecting <100 ns glitches; accepts ≥10 μs pulses; floats high when unused |
| VCC (Pin 4) | Monitored supply input | Input for 5 V rail monitoring; decoupling with 0.1 μF capacitor to GND required |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.38 V threshold | Enables accurate supervision of 5 V supplies with ±3% tolerance, avoiding premature or delayed resets |
| 140 ms minimum reset timeout | Guarantees microprocessor core and peripherals fully stabilize before exit from reset state |
| Operation down to 1.0 V VCC | Maintains valid RESET assertion during severe brownout, preventing undefined processor behavior |
| 5 μA typical supply current | Minimizes quiescent load on backup power sources in always-on safety-critical subsystems |
| 100 ns glitch immunity on MR | Eliminates false resets from ESD or switching noise without requiring external RC filters |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitors main 5 V supply powering MCU, CAN transceiver, and sensor interface in under-hood ECU. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET during cold cranking voltage sag (down to 6 V battery → 4.2 V rail). Use Value: Prevents MCU lockup or corrupted flash writes by holding reset until VCC recovers above 4.38 V and stabilizes for ≥140 ms. |
Use Scenario: Ensures deterministic startup of ARM-based controller in modular I/O rack with shared 5 V backplane. IC Role / Device Role / Timing Role: Generates power-on reset pulse synchronized to 5 V rail ramp; debounced MR supports field-service reset via front-panel button. Use Value: Eliminates need for discrete RC reset networks, reducing BOM count and improving timing repeatability across temperature. |
| Medical Infusion Pump Controller | Railway Signaling Interface Board |
Use Scenario: Supervises isolated 5 V DC/DC converter powering safety-critical motor control MCU. IC Role / Device Role / Timing Role: Active-low RESET output directly drives MCU's nRST pin; operates reliably at 1.0 V VCC during fault-induced decay. Use Value: Guarantees fail-safe shutdown and prevents unintended actuation during power collapse per IEC 62304 Class C requirements. |
Use Scenario: Provides reset assurance for FPGA-based protocol translator handling EN 50155-compliant 5 V supply with ±25% tolerance. IC Role / Device Role / Timing Role: Monitors rail with 30 ppm/°C tempco to maintain reset accuracy across −40°C to +70°C cabinet environment. Use Value: Meets SIL-2 functional safety requirement for deterministic reset timing without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811MESA+ | 4.38 V threshold, same SOT-143 package, but higher 10 μA max supply current and no guaranteed 1 V VCC operation | Lacks 1 V reset validity and tighter tempco; suitable only for non-safety-critical consumer designs | Select MAX811MESA+ only if legacy footprint compatibility is mandatory and 1 V brownout hold is not required |
| TPS3808G33DBVR | 3.3 V threshold (not 4.38 V), adjustable delay, 1.5 μA typical current, but requires external resistor for delay setting | Designed for 3.3 V systems; mismatched threshold makes direct replacement invalid for 5 V rail supervision | Choose TPS3808G33DBVR only when supervising 3.3 V supplies and programmable timeout is needed |
Compared with MAX811MESA+, ADM811MARTZ-REEL7 provides superior brownout resilience (1 V operation vs. 2.5 V min) and lower leakage; versus TPS3808G33DBVR, it offers exact 4.38 V threshold match for 5 V systems without external components, simplifying layout and validation.
Availability
ADM811MARTZ-REEL7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC modules, medical infusion pump controllers, and railway signaling interface boards requiring stable component supply with full RoHS compliance and traceable lot history.
Supply support for ADM811MARTZ-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, headquartered in Norwood, MA, 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-emphasizing precision threshold accuracy, wide VCC operating range, and robust manual reset functionality.
FAQ
What is the exact reset threshold voltage of ADM811MARTZ-REEL7?
The ADM811MARTZ-REEL7 has a nominal reset threshold of 4.38 V at 25°C, with guaranteed range of 4.25 V to 4.50 V over the full −40°C to +85°C operating temperature range. This value is factory-trimmed and specified in Table 1 and Table 4 of the Rev. H datasheet, making it suitable for precise 5 V supply monitoring without external calibration.
Does ADM811MARTZ-REEL7 support operation below 2.0 V VCC?
Yes, ADM811MARTZ-REEL7 asserts and maintains a valid active-low RESET output down to VCC = 1.0 V, as confirmed in the Absolute Maximum Ratings table and General Description section. This ensures deterministic microprocessor hold during deep brownout conditions where other supervisors may release reset prematurely.
What is the minimum pulse width required on the MR pin of ADM811MARTZ-REEL7?
The MR pin of ADM811MARTZ-REEL7 requires a minimum low-going pulse width of 10 μs to guarantee recognition, as specified in the "Manual Reset" section of the datasheet. Pulses shorter than 100 ns are rejected to prevent false triggering from noise or switch bounce, enabling reliable manual reset in electrically noisy environments.
Is ADM811MARTZ-REEL7 RoHS compliant and what does the 'Z' suffix indicate?
Yes, ADM811MARTZ-REEL7 is RoHS compliant-the 'Z' suffix explicitly denotes RoHS-compliant packaging per Analog Devices' Ordering Guide. The device meets EU Directive 2011/65/EU and contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, with branding code MBT# confirming compliance.
What package type and dimensions does ADM811MARTZ-REEL7 use?
ADM811MARTZ-REEL7 uses the JEDEC-standard 4-lead SOT-143 (package option RA-4), with body dimensions of 2.90 mm × 1.30 mm × 1.07 mm and gull-wing lead pitch of 0.95 mm. Outline drawing Figure 12 confirms compliance to TO-253-AA standards, enabling standard SMT placement and reflow profiles.
ADM811MARTZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
ADM811MARTZ-REEL7 FAQ
1.How can I place an order for ADM811MARTZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM811MARTZ-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 ADM811MARTZ-REEL7 reliable?
The price and inventory of ADM811MARTZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM811MARTZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM811MARTZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM811MARTZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM811MARTZ-REEL7?
ADM811MARTZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM811MARTZ-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 ADM811MARTZ-REEL7?
For technical support, including ADM811MARTZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM811MARTZ-REEL7 requirements.
6.How does Aetrix verify that ADM811MARTZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM811MARTZ-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 ADM811MARTZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM811MARTZ-REEL7?
All ADM811MARTZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM811MARTZ-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 ADM811MARTZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM811MARTZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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