My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX811TEUS+T
- Part No.:
- MAX811TEUS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX811TEUS+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,813
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX811TEUS+T from Maxim Integrated is a low-power microprocessor supervisory circuit that monitors 3.08V supply voltage, asserts an active-low reset signal for ≥140ms after power-up, and features a debounced manual reset input-used in portable battery-powered systems to prevent μP startup errors during brownout.
For engineers reviewing the MAX811TEUS+T datasheet, MAX811TEUS+T pinout, MAX811TEUS+T application, or MAX811TEUS+T equivalent, key selection criteria include reset threshold accuracy (±0.05V over -40°C to +85°C), guaranteed RESET validity down to VCC = 1V, 2.7µA typical supply current at 3.6V, and SOT143 package compatibility with space-constrained embedded designs.
Technical Context
The MAX811TEUS+T implements a precision bandgap-based voltage comparator with internal hysteresis and a monostable timeout circuit to generate a minimum 140ms reset pulse upon VCC rise above 3.08V. Its reset assertion remains valid even as VCC drops to 1V, ensuring deterministic behavior during deep brownout.
It integrates a 20kΩ internal pull-up on the MR pin, accepts TTL/CMOS logic levels, and rejects transients ≤100ns while providing glitch immunity up to 20µs for 125mV VCC undershoot-enabling reliable operation in noisy industrial and portable environments without external debounce components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V nominal (±0.05V over -40°C to +85°C); ensures reset triggers before system ICs drop below 3V ±10% operating range |
| Supply Current | 2.7µA typical at 3.6V; enables multi-year battery life in always-on portable instrumentation |
| Reset Timeout | 140ms minimum; meets JEDEC JESD8-12B power-on reset timing for 3V μPs |
| VCC Range | 1.2V to 5.5V operating; supports valid reset assertion down to 1V VCC for fail-safe brownout detection |
| MR Input Threshold | 0.25×VCC low / 0.7×VCC high; compatible with 3.3V and 3V CMOS logic without level shifters |
| Reset Propagation Delay | 0.5µs max from MR deassertion to RESET release; enables fast manual recovery in test/debug workflows |
| Transient Immunity | Rejects 20µs negative VCC glitches at 125mV overdrive; eliminates false resets from switching noise |
Pinout & Package
The MAX811TEUS+T is housed in a 4-pin SOT143 (U4+1) surface-mount package measuring 2.9mm × 1.6mm × 1.1mm, optimized for high-density PCB layouts in handheld and IoT edge devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Low-impedance return path for reset comparator and internal bias circuits; must be connected directly to system ground plane |
| RESET (Pin 2) | Active-low open-drain reset output | Sinks ≥1.2mA at VCC = VTH(MAX); requires external pull-up to VCC or μP reset rail for proper logic level translation |
| MR (Pin 3) | Manual reset input | Active-low with 20kΩ internal pull-up; accepts momentary switch to GND or CMOS/TTL logic; no external R/C needed |
| VCC (Pin 4) | Supply input | Accepts 1.2–5.5V; powers internal comparator, timer, and MR pull-up; decoupling capacitor required within 5mm |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset state during deep brownout-critical for nonvolatile memory write protection and safe shutdown sequencing |
| Integrated 20kΩ MR pull-up resistor | Eliminates need for external pull-up component, reducing BOM count and PCB area in cost-sensitive consumer electronics |
| 140ms min reset timeout with temperature stability | Meets μP power-on reset timing requirements across full industrial temperature range without external timing capacitors |
| 3.08V precision reset threshold | Targets 3V ±5% supplies used in modern low-voltage microcontrollers and sensors, avoiding premature or delayed reset assertion |
| 2.7µA supply current at 3.6V | Enables direct integration into battery-backed real-time clocks and sensor nodes with >5-year shelf life |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG patch monitoring heart rate continuously on coin-cell battery. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low RESET to ARM Cortex-M0+ MCU during battery voltage sag below 3.08V. Use Value: Prevents corrupted ADC sampling and flash writes during brownout; 2.7µA quiescent current extends battery life beyond 24 months. | Use Scenario: DIN-rail mounted analog input module operating in factory ambient (-40°C to +70°C). IC Role / Device Role / Timing Role: Power supply monitor generating 140ms power-on reset pulse for TI MSP430F5xx controller after 24V DC-DC startup. Use Value: Guarantees deterministic boot sequence despite 100mV line transients from nearby contactor switching; operates reliably at full temperature range. |
| Smart Meter Battery Backup | Automotive Body Control Module |
Use Scenario: Electricity meter retaining time-of-use data during main AC failure using supercapacitor backup. IC Role / Device Role / Timing Role: Supervises 3.3V backup rail and asserts RESET to secure microcontroller when voltage falls below 3.08V. Use Value: Ensures EEPROM write completion before power loss; RESET remains valid down to VCC = 1V, covering full supercap discharge curve. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting via LIN bus. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output feeding Infineon AURIX TC234L; initiates controlled reset on battery dip during cold-crank. Use Value: Rejects 20µs load-dump transients per ISO 7637-2 Pulse 1; prevents spurious reboots during engine start-up. |
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; 1.6µA supply current; no internal MR pull-up; requires external resistor on MR | Lacks integrated MR pull-up, increasing BOM count; tighter threshold tolerance (±0.5%) but longer 200ms reset timeout | Preferred where ultra-low current dominates design priority and external pull-up is acceptable |
| STM6315RWX6F | 3.08V threshold; 3.5µA supply current; includes watchdog timer; MR pin lacks internal pull-up | Offers watchdog functionality absent in MAX811TEUS+T; higher current draw reduces battery lifetime in always-on use cases | Chosen when system-level watchdog supervision is required alongside voltage monitoring |
Compared with TPS3808G30DBVR and STM6315RWX6F, the MAX811TEUS+T delivers optimal balance of ultra-low current (2.7µA), integrated MR pull-up, and precise 3.08V threshold-making it ideal for space- and power-constrained applications where BOM simplification and brownout robustness are critical.
Availability
MAX811TEUS+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart meter battery backup systems requiring stable component supply across extended product lifecycles.
Supply support for MAX811TEUS+T 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/MAX812 family was engineered specifically for low-power microprocessor supervision in battery-operated and space-constrained systems-delivering guaranteed reset timing, wide VCC range, and integrated manual reset without external components.
FAQ
What is the exact reset threshold voltage of the MAX811TEUS+T?
The MAX811TEUS+T has a nominal reset threshold voltage of 3.08V, with a guaranteed range of 3.00V to 3.15V over the full operating temperature range of -40°C to +85°C. This value is laser-trimmed at wafer sort and confirmed by production testing per Maxim's six-sigma design limits. The 'T' suffix in MAX811TEUS+T explicitly denotes the 3.08V threshold variant.
Does the MAX811TEUS+T provide a reset signal when VCC drops below the threshold?
Yes-the MAX811TEUS+T asserts its active-low RESET output whenever VCC falls below the 3.08V threshold, and holds it asserted until VCC rises above the threshold and remains stable for at least 140ms. The device also guarantees RESET remains valid (low) down to VCC = 1V, enabling reliable brownout detection even during deep supply collapse.
Can the MAX811TEUS+T be used with a 3.3V microcontroller?
Yes-the MAX811TEUS+T is fully compatible with 3.3V microcontrollers. Its MR input accepts logic-high thresholds of 0.7×VCC (≥2.31V at 3.3V), and its open-drain RESET output can be pulled up to the μP's 3.3V reset rail. The 3.08V threshold aligns precisely with 3.3V ±5% supply tolerances, ensuring reset triggers before the μP enters undefined operation.
Is an external pull-up resistor required for the RESET pin of the MAX811TEUS+T?
Yes-an external pull-up resistor is required on the RESET pin of the MAX811TEUS+T because it features an open-drain output. A typical value is 10kΩ to the μP's VCC or reset rail voltage. This ensures a defined logic-high level when RESET is not actively driven low, which is essential for proper microprocessor initialization and avoids floating node issues.
What is the supply current consumption of the MAX811TEUS+T at 3.6V?
The MAX811TEUS+T draws 2.7µA typical supply current at VCC = 3.6V and TA = +25°C, with a maximum of 10µA over the full -40°C to +85°C temperature range. This ultra-low quiescent current is measured with no load on RESET and MR held high, making the MAX811TEUS+T suitable for multi-year battery operation in always-on sensor and metering applications.
MAX811TEUS+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- 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:
- 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+T FAQ
1.How can I place an order for MAX811TEUS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX811TEUS+T 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+T reliable?
The price and inventory of MAX811TEUS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX811TEUS+T is usually 5 days.
3.What payment methods are accepted for MAX811TEUS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX811TEUS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX811TEUS+T?
MAX811TEUS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX811TEUS+T 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+T?
For technical support, including MAX811TEUS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX811TEUS+T requirements.
6.How does Aetrix verify that MAX811TEUS+T is sourced from the original manufacturer or authorized distributors?
All MAX811TEUS+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX811TEUS+T?
All MAX811TEUS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX811TEUS+T, 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+T part is unused and in its original packaging.
Return procedure for MAX811TEUS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX811TEUS+T 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…
