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Analog Devices Inc./Maxim Integrated MAX6461UR26+T
- Part No.:
- MAX6461UR26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6461UR26+T.pdf
- Description:
- IC VOLT DETECTOR LP SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6461UR26+T from Maxim Integrated is a precision ultra-low-power voltage detector IC designed for battery and power-supply monitoring in space-constrained, low-current systems. It features a factory-set 2.60V lower trip threshold (VTH−), ±2.5% threshold accuracy over −40°C to +125°C, 1.0µA supply current at 3.6V, and 17µs propagation delay. It operates in SOT23-3 package and asserts active-low push-pull output when VCC falls below VTH−.
For engineers reviewing the MAX6461UR26+T datasheet, MAX6461UR26+T pinout, MAX6461UR26+T application, or MAX6461UR26+T equivalent, key selection criteria include its fixed 2.6V detection point, hysteresis-enabled noise immunity, guaranteed operation down to 1.2V VCC, compatibility with Li⁺ and 3.3V/5V rails, and qualification for automotive-grade temperature range.
Technical Context
The MAX6461UR26+T implements a precision bandgap reference and comparator-based detection architecture with internally trimmed resistor networks to set its 2.60V nominal VTH−. Its internal 5% hysteresis (VTH+ = VTH− × 1.05 ≈ 2.73V) prevents output chatter during slow-rising or noisy supply conditions.
This device belongs to the MAX6461–MAX6466 family's voltage detector subset (not µP supervisory), so it lacks reset timeout functionality and delivers immediate output assertion on threshold breach. Its push-pull active-low output drives directly into CMOS/TTL logic without external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH− Threshold | 2.600V (typ), ±2.5% over −40°C to +125°C - ensures reliable brownout detection across automotive and industrial environments |
| Supply Current | 1.0µA (typ) at 3.6V - enables multi-year battery life in always-on monitoring applications |
| Propagation Delay | 17µs (max) - provides fast response to supply faults while avoiding transient false triggers |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - eliminates oscillation near threshold during slow VCC ramp-up/down |
| Operating Voltage Range | 1.2V to 6.0V - supports direct monitoring of Li⁺ cells (2.7–4.2V), 3.3V, and 5V rails |
| Output Type | Push-pull, active-low - sinks up to 9mA at VCC ≥ 4.5V; no external pull-up required |
| Temperature Range | −40°C to +125°C - qualified for under-hood, industrial control, and portable medical use |
Pinout & Package
SOT23-3 package: 1.0mm × 1.4mm × 1.1mm body, 0.95mm pitch, lead-free (RoHS-compliant) +T marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Active-low push-pull output | Asserts low when VCC < VTH− (2.60V); releases high when VCC > VTH+ (2.73V); drives CMOS/TTL loads directly |
| 2 GND | Ground reference | Primary return path for internal circuitry and output sink current; must be connected to system ground plane |
| 3 VCC | Supply input & monitored voltage | Single-pin dual function: powers IC and serves as the sensed rail; no separate sense input required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical at 3.6V - extends battery runtime in wearables and remote sensors |
| Preset 2.60V detection threshold | Factory-trimmed, no external resistors needed - reduces BOM count and layout area |
| Internal 5% hysteresis | Eliminates need for external hysteresis network - improves reliability in noisy power environments |
| ±2.5% threshold accuracy | Guaranteed over full −40°C to +125°C range - removes need for calibration in harsh environments |
| No external components required | Self-contained detection solution - simplifies design, accelerates time-to-market, lowers assembly cost |
Applications
| Battery Voltage Monitoring | Power-Rail Brownout Detection |
|---|---|
|
Use Scenario: Continuous monitoring of single-cell Li⁺ battery voltage in portable medical devices to prevent deep discharge. IC Role / Device Role / Timing Role: Voltage detector asserting reset signal to MCU when cell voltage drops below 2.60V. Use Value: Prevents irreversible battery damage and data corruption by triggering graceful shutdown before critical undervoltage. |
Use Scenario: Supervision of 3.3V I/O rail in industrial PLC modules exposed to EMI and thermal cycling. IC Role / Device Role / Timing Role: Fault-detection element that disables downstream peripherals upon rail collapse. Use Value: Ensures deterministic system behavior during power transients, eliminating latch-up or undefined logic states. |
| Load Switch Enable Control | Low-Power Sensor Node Supervision |
|
Use Scenario: Enabling/disabling a PMIC load switch based on main supply stability in battery-backed IoT edge nodes. IC Role / Device Role / Timing Role: Input to enable logic of external high-side MOSFET driver; asserted low when supply is valid. Use Value: Prevents premature power-up of sensitive analog front-ends until stable 2.6V+ rail is confirmed. |
Use Scenario: Power-good signaling for sub-µA wake-up circuits in environmental sensor motes. IC Role / Device Role / Timing Role: Ultra-low-current supervisor providing clean enable signal to microcontroller's reset input. Use Value: Guarantees MCU only wakes from sleep when supply meets minimum operating voltage, reducing false wake events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB26DBZR | 2.63V threshold, 0.5µA ICC, SOT23-3, but ±3% accuracy over −40°C to +85°C only | Limited temperature range; not rated for +125°C operation | Choose for cost-sensitive consumer designs where extended temperature is unnecessary |
| TPS3801K26DBVR | 2.60V threshold, 1.8µA ICC, SOT23-5, includes manual reset input and watchdog timer | Additional features increase complexity and current draw; requires 5-pin layout | Choose only if manual reset or watchdog functionality is required alongside voltage detection |
Compared with TLV803EB26DBZR and TPS3801K26DBVR, the MAX6461UR26+T uniquely combines full −40°C to +125°C qualification, 1.0µA supply current, and factory-trimmed 2.60V threshold in a minimal 3-pin SOT23 footprint-making it optimal for automotive, industrial, and long-life battery applications where size, temperature robustness, and ultra-low power are non-negotiable.
Availability
MAX6461UR26+T is available at Aetrix Electronics and suitable for battery monitoring, power-rail supervision, and load-switch control requiring stable component supply across automotive, industrial, and portable medical equipment lifecycles.
Supply support for MAX6461UR26+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding applications.
The MAX6461UR26+T belongs to Maxim's ultra-low-power voltage detector product line, engineered specifically for reliable, zero-calibration power supervision in battery-powered and thermally aggressive systems.
FAQ
What is the exact voltage threshold of the MAX6461UR26+T?
The MAX6461UR26+T has a factory-set lower trip threshold (VTH−) of 2.600V (typical) with ±2.5% tolerance over −40°C to +125°C, and an upper trip threshold (VTH+) of approximately 2.73V due to its internal 5% hysteresis. These values are laser-trimmed during manufacturing and require no external adjustment.
Does the MAX6461UR26+T provide a reset timeout period?
No, the MAX6461UR26+T does not include a reset timeout period. It is a pure voltage detector (not a µP supervisory circuit), so its output responds immediately to threshold breaches. For timeout functionality, consider the MAX6464–MAX6466 series, such as MAX6464UR26+T, which guarantees ≥150ms reset assertion after VCC recovery.
Can the MAX6461UR26+T monitor voltages below 1.6V?
No-the MAX6461UR26+T is specified for operation with VCC from 1.2V to 6.0V, but its 2.60V threshold means it is intended to monitor rails ≥2.6V. The device itself functions down to 1.2V, but detection only occurs when the monitored voltage crosses its fixed 2.60V threshold; it cannot detect sub-1.6V events.
What is the output drive capability of the MAX6461UR26+T?
The MAX6461UR26+T features a push-pull active-low output capable of sinking up to 9.0mA at VCC ≥ 4.5V (VOL ≤ 0.4V), and sourcing sufficient current to drive standard CMOS inputs when deasserted. It requires no external pull-up resistor, distinguishing it from open-drain alternatives like MAX6463 variants.
Is the MAX6461UR26+T compatible with lead-free PCB assembly processes?
Yes-the "+T" suffix in MAX6461UR26+T explicitly denotes lead-free, RoHS-compliant packaging. It is qualified for standard Pb-free reflow profiles (JEDEC J-STD-020), with a maximum peak solder temperature of +300°C for 10 seconds, and is supplied in tape-and-reel format per ordering requirements.
MAX6461UR26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.6V
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active Low
- Reset Timeout:
- 14µs Typical Propagation Delay
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6461UR26+T FAQ
1.How can I place an order for MAX6461UR26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6461UR26+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 MAX6461UR26+T reliable?
The price and inventory of MAX6461UR26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6461UR26+T is usually 5 days.
3.What payment methods are accepted for MAX6461UR26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6461UR26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6461UR26+T?
MAX6461UR26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6461UR26+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 MAX6461UR26+T?
For technical support, including MAX6461UR26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6461UR26+T requirements.
6.How does Aetrix verify that MAX6461UR26+T is sourced from the original manufacturer or authorized distributors?
All MAX6461UR26+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 MAX6461UR26+T meets industry standards.
7.What is the process for return or replacement of MAX6461UR26+T?
All MAX6461UR26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6461UR26+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 MAX6461UR26+T part is unused and in its original packaging.
Return procedure for MAX6461UR26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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