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Analog Devices Inc. ADM812SARTZ-REEL7
- Part No.:
- ADM812SARTZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
ADM812SARTZ-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,856
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Product details
Overview
ADM812SARTZ-REEL7 from Analog Devices is a microprocessor supervisory circuit in 4-lead SOT-143 package, providing active-high RESET output, 2.93 V reset threshold (±5% over −40°C to +85°C), 5 µA typical supply current, and 140 ms minimum power-on reset timeout. It monitors 3.3 V supply rails in embedded controllers and safety-critical instrumentation.
For engineers reviewing the ADM812SARTZ-REEL7 datasheet, ADM812SARTZ-REEL7 pinout, ADM812SARTZ-REEL7 application, or ADM812SARTZ-REEL7 equivalent, this page delivers verified functional role, precise voltage monitoring specs, manual reset timing behavior, and RoHS-compliant SOT-143 packaging details for reliable system-level reset design.
Technical Context
The ADM812SARTZ-REEL7 implements a precision bandgap reference with 30 ppm/°C temperature coefficient to maintain 2.93 V reset threshold stability across −40°C to +85°C. Its internal timer guarantees ≥140 ms RESET assertion after VCC rises above threshold and supports valid output down to VCC = 1 V.
It features debounced manual reset input (MR) with 10 µs minimum pulse width acceptance and 100 ns glitch immunity, plus logic-high RESET output sinking 1.2 mA at 0.3 V (VCC = VTH(MAX)) and sourcing 500 µA at 0.8 × VCC (VCC > VTH(MAX)).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±0.05 V at 25°C; maintains 2.85 V to 3.00 V over full −40°C to +85°C range - ensures robust 3.3 V rail monitoring despite thermal drift. |
| RESET Output Polarity | Active-high logic output - directly interfaces with microprocessors requiring high-valid reset assertion without external inversion. |
| Supply Current | 5 µA typical at VCC < 3.6 V - enables ultra-low-power operation in battery-backed or energy-constrained systems. |
| Power-On Reset Timeout | 140 ms minimum - provides sufficient stabilization time for 3.3 V microcontrollers and peripheral ICs during cold start. |
| Manual Reset Pulse Width | ≥10 µs minimum - rejects contact bounce and EMI-induced transients while supporting simple push-button integration. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments without derating. |
| Package | SOT-143 (RA-4), 4-lead, JEDEC-compliant - surface-mount compatible with standard reflow profiles and space-constrained PCB layouts. |
Pinout & Package
ADM812SARTZ-REEL7 uses a 4-lead SOT-143 (RA-4) package with gull-wing leads, 1.92 mm body width, and 0.90 mm lead pitch per JEDEC TO-253-AA standard.
| 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 reset threshold accuracy. |
| 2 RESET | Active-high reset output | Drives high when VCC < 2.85 V or MR is low; remains high for ≥140 ms after VCC exceeds 2.93 V - asserts processor reset condition. |
| 3 MR | Debounced manual reset input | Active-low; accepts pulses ≥10 µs; ignores noise <100 ns - enables reliable user-initiated system recovery without external RC filtering. |
| 4 VCC | Monitored supply input | Connects to 3.3 V rail; requires 0.1 µF decoupling capacitor to GND - defines reset trigger point and powers internal reference and timer. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93 V threshold | Maintains ±5% tolerance over −40°C to +85°C - eliminates need for external trimming in 3.3 V systems. |
| Ultra-low 5 µA quiescent current | Reduces standby power by >50% vs. legacy 812 variants - extends battery life in portable instrumentation. |
| Valid RESET down to VCC = 1 V | Ensures clean shutdown sequence as supply collapses - prevents metastability or spurious processor wake-up. |
| Integrated 10 µs MR debounce | Removes need for external Schmitt trigger or RC network - simplifies BOM and board layout for manual reset implementation. |
| RoHS-compliant (Z suffix) | Lead-free SOT-143 package with M67 top-side marking - meets IPC/JEDEC J-STD-020D reflow requirements. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power cycling of programmable logic controllers during factory commissioning or field firmware updates. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET to hold CPU in reset until 3.3 V rail stabilizes post-power-up. Use Value: Prevents partial initialization and register corruption during brownout recovery with guaranteed 140 ms minimum timeout. |
Use Scenario: Monitoring 3.3 V domain powering CAN transceivers and sensor interface ICs in door module ECUs. IC Role / Device Role / Timing Role: Voltage monitor detecting undervoltage on microcontroller supply rail and triggering safe state entry. Use Value: Enables fail-safe shutdown before logic errors propagate, leveraging 2.93 V threshold aligned with 3.3 V LDO dropout margin. |
| Medical Patient Monitor Front-End | Railway Signaling Interface Units |
Use Scenario: Ensuring deterministic boot sequence for ARM Cortex-M4-based acquisition subsystems handling ECG/SpO₂ signals. IC Role / Device Role / Timing Role: Active-high RESET generator synchronized to 3.3 V power rail ramp-up, with manual reset support for clinical recalibration. Use Value: Guarantees processor remains held until analog front-end references settle, using 5 µA supply current to minimize thermal drift impact. |
Use Scenario: Supervising isolated 3.3 V supplies feeding FPGA configuration memory and watchdog peripherals in EN 5012x-certified units. IC Role / Device Role / Timing Role: Fault-detection element validating power integrity prior to enabling safety-critical I/O drivers. Use Value: Delivers −40°C to +85°C operational reliability and 30 ppm/°C threshold stability required for railway ambient temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX812SUT+T | 2.93 V threshold, SOT-23-4 package, 1.2 µA max supply current at 3.3 V, no manual reset input. | Lacks MR pin - requires external switch interface or logic-level translation for manual recovery. | Select when board space is constrained and manual reset is handled elsewhere in system architecture. |
| TPS3808G33DBVR | 3.3 V threshold (±0.5%), SOT-23-5, 16 µA typical supply current, adjustable delay via capacitor. | Higher threshold tolerance (±0.5% vs. ±5%) but fixed 3.3 V point - less flexible for marginal 3.3 V rail designs. | Prefer when tighter threshold accuracy is mandatory and additional pin for delay programming is acceptable. |
Compared with MAX812SUT+T and TPS3808G33DBVR, ADM812SARTZ-REEL7 uniquely combines RoHS-compliant SOT-143 packaging, integrated debounced MR, and 2.93 V threshold optimized for real-world 3.3 V rail tolerances - making it ideal for industrial and transportation systems where manual intervention and thermal robustness are critical.
Availability
ADM812SARTZ-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitor front-ends, and railway signaling interface units requiring stable component supply across extended temperature ranges.
Supply support for ADM812SARTZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM812SARTZ-REEL7 belongs to the ADM811/ADM812 family of microprocessor supervisory circuits designed specifically for reliable power-on reset and undervoltage detection in industrial, automotive, and safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of ADM812SARTZ-REEL7 and how does it vary with temperature?
The ADM812SARTZ-REEL7 has a nominal reset threshold of 2.93 V at 25°C, with guaranteed range of 2.85 V to 3.00 V over −40°C to +85°C. Its temperature coefficient is 30 ppm/°C, meaning threshold drift is ≤±0.015 V across the full operating range - ensuring consistent 3.3 V rail supervision without calibration.
Does ADM812SARTZ-REEL7 provide active-high or active-low reset output, and what are its drive capabilities?
ADM812SARTZ-REEL7 provides an active-high RESET output. It sinks 1.2 mA at 0.3 V when VCC = VTH(MAX), and sources 500 µA at 0.8 × VCC when VCC > VTH(MAX). This allows direct connection to CMOS inputs without pull-up resistors in most 3.3 V microcontroller designs.
How does the manual reset (MR) input behave on ADM812SARTZ-REEL7, and what is its minimum pulse width requirement?
The MR input on ADM812SARTZ-REEL7 is active-low and internally debounced. It reliably accepts pulses ≥10 µs and rejects transients <100 ns. When asserted, it forces RESET high for ≥140 ms after release - enabling robust push-button reset without external hardware filtering.
What is the supply current consumption of ADM812SARTZ-REEL7, and under what conditions is it measured?
ADM812SARTZ-REEL7 draws 5 µA typical supply current when VCC < 3.6 V and IOUT = 0 mA, per the Rev. H datasheet. This ultra-low quiescent current is maintained across −40°C to +85°C, making it suitable for always-on monitoring in battery-powered instrumentation.
Is ADM812SARTZ-REEL7 RoHS-compliant, and what does the 'Z' suffix indicate in its part number?
Yes, ADM812SARTZ-REEL7 is RoHS-compliant. The 'Z' suffix explicitly denotes lead-free, halogen-free construction meeting EU Directive 2011/65/EU requirements. Its SOT-143 package uses matte tin lead finish and conforms to IPC/JEDEC J-STD-020D reflow standards.
ADM812SARTZ-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:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
ADM812SARTZ-REEL7 FAQ
1.How can I place an order for ADM812SARTZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM812SARTZ-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 ADM812SARTZ-REEL7 reliable?
The price and inventory of ADM812SARTZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM812SARTZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM812SARTZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM812SARTZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM812SARTZ-REEL7?
ADM812SARTZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM812SARTZ-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 ADM812SARTZ-REEL7?
For technical support, including ADM812SARTZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM812SARTZ-REEL7 requirements.
6.How does Aetrix verify that ADM812SARTZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM812SARTZ-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 ADM812SARTZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM812SARTZ-REEL7?
All ADM812SARTZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM812SARTZ-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 ADM812SARTZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM812SARTZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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