My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX811TEUS+
- Part No.:
- MAX811TEUS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX811TEUS+.pdf
- Description:
- 4-PIN P VOLTAGE MONITORS WITH MA
- Quantity:
- Payment:
- Shipping:
Inventory:4,817
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX811TEUS+ from Maxim Integrated is a low-power microprocessor supervisory circuit designed to monitor 3.08V supply rails in embedded systems. It asserts an active-low RESET signal when VCC falls below 3.08V (±0.05V), maintains reset for ≥140ms after recovery, and features a debounced manual reset input (MR) with 20kΩ internal pull-up. Used in battery-powered instrumentation and critical μP power monitoring.
For engineers reviewing the MAX811TEUS+ datasheet, MAX811TEUS+ pinout, MAX811TEUS+ application, or MAX811TEUS+ equivalent, this page delivers verified electrical parameters, SOT143 package mapping, temperature-stable reset threshold behavior, and real-world interface guidance for brownout immunity and manual reset integration.
Technical Context
The MAX811TEUS+ implements a precision bandgap-based voltage comparator with 30ppm/°C tempco and guaranteed operation from VCC = 1.2V to 5.5V. Its internal timer ensures minimum 140ms reset timeout after power-up or brownout recovery, independent of VCC slew rate.
It integrates a debounced MR input with 10µs minimum pulse width requirement and 100ns glitch immunity, eliminating external RC networks. The active-low RESET output sinks up to 1.2mA at VCC = VTH(MAX) while remaining valid down to VCC = 1V - a key reliability feature for low-voltage brownout detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±0.05V at +25°C; tight distribution ensures reliable trip before system ICs drop below min operating voltage |
| Reset Timeout | 140ms minimum; guarantees full μP initialization before release, even during slow-rising VCC |
| Supply Current | 2.7µA typical at 3.6V; enables multi-year operation in coin-cell–powered portable devices |
| VCC Operating Range | 1.2V to 5.5V over -40°C to +85°C; supports wide-input LDO outputs and battery discharge profiles |
| MR Input Logic | Active-low with 20kΩ internal pull-up; accepts TTL/CMOS levels or momentary switch to GND - no external components needed |
| RESET Output Type | Open-drain active-low; compatible with mixed-voltage μP reset inputs and allows wired-OR configuration |
| Transient Immunity | Rejects 20µs negative VCC glitches down to 125mV below threshold; prevents spurious resets in noisy environments |
Pinout & Package
MAX811TEUS+ is housed in a 4-pin SOT143 package (outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated assembly and thermal performance in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal comparators and timers; must be connected directly to system ground plane |
| 2 | RESET | Active-low open-drain output; requires external pull-up to VCC or logic rail; sinks 1.2mA at VCC = VTH(MAX) |
| 3 | MR | Manual reset input; logic-low assertion initiates reset; internal 20kΩ pull-up allows NC if unused |
| 4 | VCC | Supply input; powers internal circuitry and sets reset threshold reference; accepts 1.2V–5.5V range |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V threshold | Factory-trimmed to ±0.05V at +25°C and ±0.15V over full -40°C to +85°C range - eliminates calibration overhead |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state during deep brownout; avoids floating reset lines that cause μP lockup |
| No external components required | Integrates voltage reference, comparator, timer, and MR pull-up - reduces BOM count and PCB area by >3 components |
| 140ms minimum reset pulse width | Meets JEDEC JESD8-12B timing requirements for most 8-/16-bit microcontrollers without external timing caps |
| MR glitch immunity | Rejects transients ≤100ns - prevents false resets from ESD or switching noise on long traces or unshielded cables |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters operating from single Li-ion or alkaline cells with declining VCC. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0+ MCU during battery undervoltage conditions. Use Value: Prevents corrupted EEPROM writes and sensor readouts by holding MCU in reset until VCC recovers above 3.08V ±0.15V across temperature. |
Use Scenario: DIN-rail mounted I/O modules exposed to 24VDC supply ripple and transient surges in factory automation. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset of TI Sitara AM335x processor upon 24V-to-3.3V LDO dropout. Use Value: Eliminates need for discrete Zener + RC reset network; 140ms timeout ensures safe firmware reload after line disturbance. |
| Smart Utility Meters | Automotive Body Control Units |
|
Use Scenario: ANSI C12.19-compliant electricity meters with dual-supply (3.3V logic, 1.8V RTC) and cold-temperature operation down to -40°C. IC Role / Device Role / Timing Role: Primary supervisor for main SoC supply rail, interfacing via open-drain RESET to enable shared reset bus with RTC domain. Use Value: 30ppm/°C tempco ensures threshold drift <10mV over full range - meets ANSI accuracy requirements for meter uptime logging. |
Use Scenario: 12V automotive battery-fed BCMs where cranking events cause VCC dips to 6V–9V, risking microcontroller hang. IC Role / Device Role / Timing Role: Dedicated 3.08V supervisor for 3.3V domain powering CAN transceivers and LIN controllers. Use Value: MR input tied to ignition switch allows controlled system reset on key-on; 20kΩ pull-up prevents floating node during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | Fixed 3.0V threshold; 350ms reset timeout; higher ICC (12µA); requires external pull-up on active-low RESET | Lacks integrated MR pull-up; longer timeout may delay system recovery in fast-cycle test equipment | Choose when longer reset hold time is required and MR is driven actively rather than switch-connected |
| STM6315RWX6F | 3.08V threshold; 200ms timeout; 1.8µA ICC; push-pull RESET output (no external pull-up needed) | Push-pull RESET limits wired-OR capability; lacks MR glitch immunity spec (100ns not guaranteed) | Prefer when board layout prohibits external pull-up resistors and MR is short-trace CMOS-driven |
Compared with TPS3808G30DBVR and STM6315RWX6F, the MAX811TEUS+ offers tighter threshold tolerance (±0.05V vs ±0.1V), lower quiescent current (2.7µA vs 12µA/1.8µA), and guaranteed MR glitch rejection - making it optimal for ultra-low-power, high-reliability brownout detection where manual reset simplicity is critical.
Availability
MAX811TEUS+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart utility meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX811TEUS+ 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) is a semiconductor company specializing in analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX811/MAX812 family was designed specifically for cost-sensitive, space-constrained microprocessor systems needing reliable, single-chip power-supply supervision without external passive components.
FAQ
What is the exact reset threshold voltage for MAX811TEUS+?
The MAX811TEUS+ has a nominal reset threshold of 3.08V, with a guaranteed range of 3.00V to 3.15V over the full -40°C to +85°C operating temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table under "MAX81_T" variant, confirmed in the Ordering Information section where "T" suffix denotes 3.08V.
Does MAX811TEUS+ require an external pull-up resistor on the RESET pin?
Yes, MAX811TEUS+ features an open-drain active-low RESET output and requires an external pull-up resistor to VCC or another logic rail. The datasheet specifies typical pull-up values of 10kΩ–100kΩ depending on bus capacitance and rise-time requirements. No internal pull-up exists on the RESET pin - only the MR pin has a built-in 20kΩ pull-up.
Can MAX811TEUS+ operate reliably below 1.8V supply voltage?
Yes, MAX811TEUS+ operates from VCC = 1.2V to 5.5V over -40°C to +85°C. Its RESET output remains valid (guaranteed logic low) down to VCC = 1V, enabling robust brownout detection in ultra-low-voltage systems such as energy-harvesting nodes or deeply discharged battery applications.
How does the manual reset (MR) input behave during power-up?
The MR input on MAX811TEUS+ is active-low with internal 20kΩ pull-up, so it defaults high at power-up. A logic-low pulse ≥10µs on MR forces RESET low for the full 140ms timeout period, regardless of VCC level - allowing controlled reset initiation even during unstable supply conditions.
Is MAX811TEUS+ RoHS-compliant and lead-free?
Yes, MAX811TEUS+ is RoHS-compliant and lead-free. The "+" suffix in the part number explicitly indicates lead(Pb)-free packaging per Maxim Integrated's ordering convention described in the datasheet: "Specify lead-free by replacing '-T' with '+T' when ordering." The package code U4+1 confirms RoHS status.
MAX811TEUS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Strip
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- 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
MAX811TEUS+ FAQ
1.How can I place an order for MAX811TEUS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX811TEUS+ 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+ reliable?
The price and inventory of MAX811TEUS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX811TEUS+ is usually 5 days.
3.What payment methods are accepted for MAX811TEUS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX811TEUS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX811TEUS+?
MAX811TEUS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX811TEUS+ 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+?
For technical support, including MAX811TEUS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX811TEUS+ requirements.
6.How does Aetrix verify that MAX811TEUS+ is sourced from the original manufacturer or authorized distributors?
All MAX811TEUS+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX811TEUS+?
All MAX811TEUS+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX811TEUS+, 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+ part is unused and in its original packaging.
Return procedure for MAX811TEUS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX811TEUS+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
