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Analog Devices Inc./Maxim Integrated MAX6466XR49+T
- Part No.:
- MAX6466XR49+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR49+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,058
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Product details
Overview
The MAX6466XR49+T from Maxim Integrated is a micropower supervisory circuit with open-drain active-low reset output, 4.9V lower trip threshold (VTH− = 4.900V typ), 5.121V upper trip threshold (VTH+ = VTH− × 1.05), and guaranteed 150ms minimum reset timeout period. It operates from 1.2V to 6.0V supply, draws only 1.0µA at 3.6V, and is specified for −40°C to +125°C - ideal for battery-backed industrial sensors and low-power microcontroller reset supervision.
For engineers reviewing the MAX6466XR49+T datasheet, MAX6466XR49+T pinout, MAX6466XR49+T application, or MAX6466XR49+T equivalent, key selection criteria include its factory-trimmed 4.9V detection threshold, internal 5% hysteresis, ±2.5% threshold accuracy over temperature, open-drain output requiring external pull-up, and SC70-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6466XR49+T implements a precision bandgap reference and comparator-based voltage monitoring architecture with internally trimmed resistor networks that fix VTH− at 4.900V (±2.5% over −40°C to +125°C) and enforce VTH+ = VTH− × 1.05. Its open-drain output remains asserted low for ≥150ms after VCC rises above VTH+, ensuring reliable µP reset deassertion timing.
It features 5% internal hysteresis to prevent chatter near threshold, immunity to short VCC transients (e.g., ≤18µs glitch at 0.1V overdrive), and no external components required - all enabled by BiCMOS process integration and 581-transistor die design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH− Threshold | 4.900V (typ), ±2.5% over −40°C to +125°C - sets precise brown-out detection point for 5V systems |
| VTH+ Threshold | 5.121V (typ), VTH− × 1.05 - defines hysteresis window to prevent oscillation during slow-rising VCC |
| Reset Timeout | 150ms (min), 260ms (typ), 430ms (max) - guarantees µP remains held in reset long enough for power stabilization |
| Supply Current | 1.0µA (typ at 3.6V, −40°C to +125°C) - enables multi-year operation on coin-cell batteries |
| Propagation Delay | Falling edge: 17µs (typ at 10mV/µs slew); rising edge: 100µs (typ) - ensures fast fault response and clean release timing |
| Output Type | Open-drain, active-low - allows level-shifting to logic supplies up to 6V via external pull-up resistor |
| Operating Range | VCC = 1.2V to 6.0V - supports direct monitoring of Li+ battery (3.0–4.2V), 3.3V, and 5V rails |
Pinout & Package
MAX6466XR49+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for high-density portable designs. Pin 1 is OUT (open-drain active-low), Pin 2 is GND, and Pin 3 is VCC (supply and monitored voltage input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain reset output | Asserts low when VCC < VTH−; requires external pull-up (e.g., 10kΩ to 3.3V/5V); sinks ≥1mA at VOL ≤ 0.4V |
| 2 - GND | Analog/digital ground reference | Must be connected directly to system ground plane; no internal separation between analog and digital grounds |
| 3 - VCC | Supply input and monitored voltage rail | Both powers the IC and serves as the sensed voltage; valid range 1.2V–6.0V; no separate sense pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA typical supply current enables >10-year battery life in always-on monitoring applications |
| Factory-trimmed threshold | 4.900V VTH− with ±2.5% tolerance over full temperature range eliminates calibration overhead |
| Internal 5% hysteresis | Fixed VTH+/VTH− ratio prevents false resets during noisy or slowly recovering power rails |
| No external components | Integrated bandgap, comparator, and resistor network remove need for external resistors or capacitors |
| Transient immunity | Rejects VCC glitches ≤18µs wide at 0.1V amplitude below VTH− - critical for noisy automotive/industrial environments |
Applications
| Industrial Sensor Node Reset | Li+ Battery Voltage Monitor |
|---|---|
|
Use Scenario: Remote wireless sensor node powered by CR2032 coin cell, requiring reliable µP reset during battery voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to hold MSP430F5xx in reset until VBAT ≥ 5.121V after recharge or load removal. Use Value: 1.0µA quiescent current extends battery life beyond 7 years; 4.9V threshold matches end-of-discharge cutoff for protected Li+ cells. |
Use Scenario: Portable medical device using single-cell Li+ battery (2.8–4.2V), where system must shut down before cell over-discharge. IC Role / Device Role / Timing Role: Voltage detector triggering controlled shutdown sequence when battery drops below 4.9V, with 150ms delay to avoid false triggers from pulse loads. Use Value: ±2.5% threshold accuracy ensures consistent cutoff across temperature; open-drain output interfaces cleanly with 3.3V logic supervisor ICs. |
| Low-Power IoT Gateway | Automotive Body Control Module |
|
Use Scenario: Cellular-connected gateway operating in sleep mode (10µA avg), waking periodically to transmit data - must survive cold cranking dips. IC Role / Device Role / Timing Role: Reset supervisor holding ARM Cortex-M0+ in reset during 12V battery dips to 6V, releasing only after stable 5V LDO output recovers to ≥5.121V for ≥150ms. Use Value: Immunity to 18µs transients prevents spurious resets during ignition; SC70-3 footprint saves board area in compact gateway PCB. |
Use Scenario: Dashboard cluster module exposed to −40°C to +125°C ambient, powered from vehicle 12V rail regulated to 5V. IC Role / Device Role / Timing Role: Brown-out detector asserting reset to Infineon AURIX TC275 when 5V rail falls below 4.9V due to alternator failure or load dump recovery. Use Value: Full −40°C to +125°C specification guarantees operation under hood conditions; 5% hysteresis avoids oscillation during gradual rail recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB49DBVR | 4.9V SOT-23-3 open-drain reset IC; 1.6µA ICC; 200ms timeout; ±1% threshold accuracy; no hysteresis | Higher accuracy but lacks internal hysteresis - requires external RC network for noise immunity | Prefer TLV803EB49DBVR only if ±1% threshold tolerance is mandatory and board space allows RC filter |
| TPS3808G33DBVR | 3.3V fixed-threshold, push-pull active-low reset; 1.1µA ICC; 200ms timeout; ±0.5% accuracy; 5% hysteresis | Fixed 3.3V threshold - incompatible with 5V-system brown-out detection at 4.9V | TPS3808G33DBVR is not functionally substitutable for MAX6466XR49+T due to mismatched threshold voltage |
Compared with TLV803EB49DBVR, MAX6466XR49+T provides integrated hysteresis and lower ICC (1.0µA vs. 1.6µA), simplifying layout; compared with TPS3808G33DBVR, it delivers the exact 4.9V detection needed for 5V rail supervision - making it the only drop-in solution among alternatives.
Availability
MAX6466XR49+T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466XR49+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 power, sensing, and interface applications, with emphasis on ultra-low-power and high-reliability solutions.
The MAX6461–MAX6466 family was engineered specifically for battery-powered and thermally demanding systems needing accurate, low-current voltage supervision without external components - targeting portable, automotive, and industrial embedded markets.
FAQ
What is the exact VTH− and VTH+ voltage threshold for MAX6466XR49+T?
The MAX6466XR49+T has a nominal lower trip threshold VTH− of 4.900V (typical) with ±2.5% tolerance over −40°C to +125°C, and an upper trip threshold VTH+ of 5.121V (typical), calculated as VTH− × 1.05. These values are factory-trimmed and documented in Table 1a and 1b of the MAX6466XR49+T datasheet.
Does MAX6466XR49+T require an external pull-up resistor on the OUT pin?
Yes, MAX6466XR49+T uses an open-drain active-low output configuration, so an external pull-up resistor is mandatory. A 10kΩ resistor to 3.3V or 5V is typical; the value must ensure VOL ≤ 0.4V when sinking ≥1mA while maintaining adequate rise time for the target logic family.
What is the minimum reset timeout period guaranteed for MAX6466XR49+T?
The MAX6466XR49+T guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+, with typical and maximum values of 260ms and 430ms respectively. This ensures sufficient hold time for microcontrollers to complete power-up initialization before release.
Can MAX6466XR49+T monitor a 3.3V supply rail?
No - MAX6466XR49+T is factory-set to 4.9V detection and is intended for 5V-system brown-out monitoring. For 3.3V rails, select a variant with suffix "33" (e.g., MAX6466XR33+T) or use a different family member; the 4.9V threshold would assert reset prematurely on a healthy 3.3V rail.
Is MAX6466XR49+T compatible with lead-free PCB assembly processes?
Yes, MAX6466XR49+T uses lead-free packaging (denoted by the "+T" suffix) and is rated for standard Pb-free reflow profiles, including peak temperatures up to +260°C. The SC70-3 package meets JEDEC J-STD-020 moisture sensitivity level 1 requirements.
MAX6466XR49+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.9V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 150ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6466XR49+T FAQ
1.How can I place an order for MAX6466XR49+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR49+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 MAX6466XR49+T reliable?
The price and inventory of MAX6466XR49+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR49+T is usually 5 days.
3.What payment methods are accepted for MAX6466XR49+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR49+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR49+T?
MAX6466XR49+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR49+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 MAX6466XR49+T?
For technical support, including MAX6466XR49+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR49+T requirements.
6.How does Aetrix verify that MAX6466XR49+T is sourced from the original manufacturer or authorized distributors?
All MAX6466XR49+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 MAX6466XR49+T meets industry standards.
7.What is the process for return or replacement of MAX6466XR49+T?
All MAX6466XR49+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR49+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 MAX6466XR49+T part is unused and in its original packaging.
Return procedure for MAX6466XR49+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6466XR49+T Tags
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MIC826SYMT-TR
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