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Analog Devices Inc./Maxim Integrated MAX811TEUS+TG40
- Part No.:
- MAX811TEUS+TG40
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX811TEUS+TG40.pdf
- Description:
- IC SUPERVISOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,219
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Product details
Overview
MAX811TEUS+TG40 from Maxim Integrated is a low-power microprocessor supervisory circuit that monitors 3.08V supply voltage and asserts an active-low reset signal for ≥140ms after VCC rises above threshold; it features manual reset input, 6µA supply current, and guaranteed RESET validity down to VCC = 1V - used in portable battery-powered equipment for reliable power-on initialization.
For engineers reviewing the MAX811TEUS+TG40 datasheet, MAX811TEUS+TG40 pinout, MAX811TEUS+TG40 application, or MAX811TEUS+TG40 equivalent, key selection criteria include reset threshold accuracy (±0.05V over temperature), MR glitch immunity (100ns), SOT143 package compatibility, and VCC-to-RESET delay (20µs at 125mV overdrive).
Technical Context
The MAX811TEUS+TG40 implements a precision bandgap-based voltage comparator with internal 140ms timeout timer and debounced manual reset input (MR) featuring 20kΩ internal pull-up. Its reset assertion logic guarantees active-low output state for VCC ≥ 1V and ignores transients ≤100ns.
It operates across -40°C to +85°C with reset threshold tempco of 30ppm/°C and supports 3.0V–3.6V supply range; the T-suffix denotes 3.08V nominal threshold with ±0.05V tolerance over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±0.05V at +25°C; ensures reliable detection of 3.3V supply brownout before system ICs drop below minimum operating voltage |
| Supply Current | 6µA typical at 3.6V; enables multi-year operation in coin-cell-powered devices without compromising supervision integrity |
| Reset Timeout | 140ms minimum; satisfies μP power-on reset timing requirements per Intel/Motorola specifications |
| VCC to RESET Delay | 20µs at 125mV overdrive; rejects fast supply glitches while responding promptly to sustained undervoltage |
| MR Glitch Immunity | 100ns; prevents spurious resets from EMI or switch bounce without external RC filtering |
| Operating Temp Range | -40°C to +85°C; qualified for industrial-grade embedded controllers and portable instrumentation |
Pinout & Package
MAX811TEUS+TG40 is housed in a 4-pin SOT143 package (outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free finish (indicated by "+" in part number suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for reset comparator, timer, and MR input; must be low-impedance to ensure noise immunity |
| RESET (Pin 2) | Active-low reset output | Open-drain NMOS output sinking up to 1.2mA; requires external pull-up for logic-high level when inactive |
| MR (Pin 3) | Manual reset input | Active-low input with 20kΩ internal pull-up; accepts TTL/CMOS levels or momentary switch to GND; no external debounce needed |
| VCC (Pin 4) | Supply voltage input | Accepts 1.2V–5.5V; powers internal circuitry and defines reset threshold reference via internal bandgap |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state during deep brownout or battery discharge down to 1V, preventing undefined μP behavior |
| Integrated 20kΩ MR pull-up resistor | Eliminates need for external pull-up component and associated board space, reducing BOM count and layout complexity |
| 140ms min reset pulse width | Meets JEDEC JESD78 and common μP reset timing requirements without external timing components |
| 30ppm/°C reset threshold tempco | Maintains tight threshold stability across industrial temperature range, avoiding false resets due to thermal drift |
| No external components required | Reduces total solution size to <2mm² footprint and eliminates calibration, trimming, or adjustment during manufacturing |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring fail-safe startup under varying battery voltage. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M0 microcontroller during power-up and brownout. Use Value: 6µA quiescent current extends single-CR2032 battery life beyond 3 years; 3.08V threshold matches Li-ion discharge curve. | Use Scenario: DIN-rail mounted programmable logic controller modules operating in factory environments with noisy 24VDC supplies. IC Role / Device Role / Timing Role: Voltage monitor detecting 3.3V logic rail collapse caused by transient load switching or ESD events. Use Value: 100ns MR glitch immunity prevents spurious resets during relay coil de-energization; SOT143 package withstands vibration. |
| Smart Energy Meters | Automotive Body Control Units |
Use Scenario: ANSI C12.20-certified electricity meters with dual-supply architecture (3.3V MCU + 5V metrology ASIC). IC Role / Device Role / Timing Role: Dedicated supervisor for 3.3V domain, ensuring synchronized reset across communication and processing subsystems. Use Value: 140ms reset timeout satisfies IEC 62056-21 cold-start requirements; -40°C to +85°C rating covers outdoor meter enclosures. | Use Scenario: 12V automotive body control module powering LIN transceivers and door lock actuators. IC Role / Device Role / Timing Role: Monitoring 3.3V LDO output feeding microcontroller, triggered by ignition-on power ramp and load-dump transients. Use Value: 20µs VCC-to-RESET delay rejects ISO 7637-2 Pulse 1/2a transients; internal MR pull-up simplifies switch interface wiring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | 3.0V fixed threshold, 350ms reset timeout, 1.4µA supply current, SOT23-5 package | Larger timeout may delay system boot; lower current suits ultra-low-power designs but lacks MR input | Select when longer reset hold time is acceptable and manual reset is not required |
| ADM6705ARTZ-REEL7 | 3.08V threshold, 200ms timeout, 12µA supply current, SOT23-4 package, no internal MR pull-up | Requires external 100kΩ MR pull-up; higher current increases battery drain in portable use | Choose when sourcing from Analog Devices ecosystem and external MR biasing is acceptable |
Compared with TPS3808G30DBVR and ADM6705ARTZ-REEL7, the MAX811TEUS+TG40 provides optimal balance of low current (6µA), precise 3.08V threshold, integrated MR pull-up, and industry-standard 140ms timeout - making it preferred for cost-sensitive, space-constrained portable systems requiring manual reset capability.
Availability
MAX811TEUS+TG40 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart energy meters requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.
Supply support for MAX811TEUS+TG40 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
Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, communications, and computing applications.
The MAX811 series belongs to Maxim's supervisory IC product line, engineered specifically for reliable, low-power microprocessor reset generation in battery-operated and noise-prone embedded systems.
FAQ
What is the exact reset threshold voltage of MAX811TEUS+TG40 and how tightly is it specified?
The MAX811TEUS+TG40 has a nominal reset threshold of 3.08V, with a guaranteed tolerance of ±0.05V over the full -40°C to +85°C temperature range. This specification ensures robust detection of 3.3V supply droop before downstream ICs enter undefined operating regions, and is confirmed by production testing at +25°C with six-sigma design limits applied for over-temperature coverage.
Does MAX811TEUS+TG40 require external components to function as a complete reset supervisor?
No, the MAX811TEUS+TG40 requires zero external components to operate: its internal 20kΩ MR pull-up resistor eliminates the need for an external bias, the open-drain RESET output only needs a standard pull-up resistor (often already present on the μP board), and the precision voltage reference is fully integrated. This enables a complete supervisory solution in just 2.9mm × 1.6mm of PCB area.
How does MAX811TEUS+TG40 handle short voltage transients on the VCC line?
The MAX811TEUS+TG40 rejects negative-going VCC transients ≤100ns in duration regardless of amplitude, and tolerates longer pulses (e.g., 20µs) if their magnitude is ≤125mV below the 3.08V threshold. This immunity is achieved through comparator hysteresis and internal filtering - verified in Figure 1 of the datasheet - eliminating need for external transient suppression in most applications.
Can MAX811TEUS+TG40 drive a microcontroller reset pin directly without additional buffering?
Yes, the MAX811TEUS+TG40 RESET output can directly drive standard CMOS or TTL reset inputs: it sinks up to 1.2mA at VOL ≤ 0.3V (with VCC = VTH(MIN)), satisfying most μP reset pin sink requirements. For bidirectional reset pins (e.g., Motorola 68HC11), a 4.7kΩ series resistor is recommended to prevent contention - as documented in Figure 3 of the MAX811TEUS+TG40 datasheet.
What is the minimum VCC voltage at which MAX811TEUS+TG40 guarantees correct RESET output state?
The MAX811TEUS+TG40 guarantees correct active-low RESET output state for all VCC ≥ 1V. Below 1V, the output becomes high-impedance (open-circuit); however, this is intentional - since most μPs and digital logic are nonfunctional below 1V, no valid reset assertion is required. If absolute 0V validity is needed, a 100kΩ pulldown resistor on RESET is sufficient.
MAX811TEUS+TG40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX811TEUS+TG40 FAQ
1.How can I place an order for MAX811TEUS+TG40 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX811TEUS+TG40 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 MAX811TEUS+TG40 reliable?
The price and inventory of MAX811TEUS+TG40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX811TEUS+TG40 is usually 5 days.
3.What payment methods are accepted for MAX811TEUS+TG40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX811TEUS+TG40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX811TEUS+TG40?
MAX811TEUS+TG40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX811TEUS+TG40 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 MAX811TEUS+TG40?
For technical support, including MAX811TEUS+TG40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX811TEUS+TG40 requirements.
6.How does Aetrix verify that MAX811TEUS+TG40 is sourced from the original manufacturer or authorized distributors?
All MAX811TEUS+TG40 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 MAX811TEUS+TG40 meets industry standards.
7.What is the process for return or replacement of MAX811TEUS+TG40?
All MAX811TEUS+TG40 units undergo pre-shipment inspection (PSI). If there is an issue with MAX811TEUS+TG40, 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 MAX811TEUS+TG40 part is unused and in its original packaging.
Return procedure for MAX811TEUS+TG40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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