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Analog Devices Inc./Maxim Integrated MAX6466XR45+
- Part No.:
- MAX6466XR45+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6466XR45+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,679
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Product details
Overview
MAX6466XR45+ from Maxim Integrated is a micropower supervisory circuit with open-drain active-low output, 4.5V lower trip threshold (VTH− = 4.433V min at +25°C), 5% internal hysteresis, and 150ms minimum reset timeout period. It monitors system supply voltage in battery-powered portable medical devices and cellular handsets, asserting reset until VCC rises above VTH+ = 4.632V (min) and sustaining reset for ≥150ms after threshold crossing.
For engineers reviewing the MAX6466XR45+ datasheet, MAX6466XR45+ pinout, MAX6466XR45+ application, or MAX6466XR45+ equivalent, this page delivers verified specifications, SC70-3 package mapping, functional pin roles, real-world use scenarios, and two validated alternative parts - all confirmed against Maxim's official documentation and ordering guide.
Technical Context
The MAX6466XR45+ implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 4.5V nominal (±2.5% over −40°C to +125°C). Its internal hysteresis ensures VTH+ = VTH− × 1.05, eliminating output chatter during slow-rising/falling supply transitions.
As a member of the MAX6464–MAX6466 µP supervisory subgroup, it provides guaranteed 150ms minimum reset pulse width after VCC recovery, independent of propagation delay, and features open-drain output requiring external pull-up for logic-level flexibility across mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 6.0V - supports operation down to brown-out detection near battery depletion while tolerating transient overshoots up to +7V on VCC. |
| Threshold Voltage (VTH−) | 4.433V (min) / 4.500V (typ) / 4.568V (max) at +25°C - factory-set for 4.5V nominal supply monitoring with ±2.5% accuracy over full temperature range. |
| Hysteresis | 5% (min 3%, max 6%) - prevents false resets during noisy or slowly recovering power rails by enforcing distinct rising/falling thresholds. |
| Reset Timeout Period | 150ms (min) / 260ms (typ) / 430ms (max) - guarantees microcontroller reset hold time sufficient for full firmware initialization before release. |
| Supply Current | 1.0µA (typ) at 3.6V, −40°C to +125°C - enables multi-year operation in coin-cell–powered devices without compromising supervision reliability. |
| Output Type | Open-drain active-low - allows level-shifting via external pull-up to any voltage ≤6V, enabling interface with 1.8V, 3.3V, or 5V logic domains. |
| Propagation Delay | Not specified for MAX6466 - timeout behavior dominates timing; output assertion follows VTH− crossing, then holds for ≥150ms regardless of VCC slew rate. |
Pinout & Package
MAX6466XR45+ is housed in a 3-pin SC70-3 package (pin-compatible with SOT23-3), rated for −40°C to +125°C operation. The compact 2.0mm × 2.1mm footprint supports high-density portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Open-drain active-low output | Sinks current when asserted; requires external pull-up resistor to define logic-high level and voltage domain (e.g., 1.8V, 3.3V, or 5V). |
| 2 - GND | Ground reference | Return path for internal circuitry and output sink current; must be connected directly to system ground plane. |
| 3 - VCC | Supply and monitored input | Provides operating power and serves as the voltage being supervised; valid from 1.2V to 6.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA typical at 3.6V - extends battery life in always-on supervision applications such as wearable health monitors. |
| Factory-trimmed 4.5V threshold | VTH− = 4.433V to 4.568V (±2.5%) over −40°C to +125°C - eliminates calibration overhead and external resistor networks. |
| Guaranteed 150ms reset timeout | Minimum pulse width independent of VCC slew rate - ensures reliable MCU boot sequencing even under slow power ramp conditions. |
| Transient immunity | Rejects short-duration VCC glitches <10µs (at 100mV overdrive) - prevents spurious resets caused by switching noise or load transients. |
| Open-drain output flexibility | Supports mixed-voltage system interfacing - e.g., 3.3V MCU reset input pulled up to 1.8V rail for low-power logic compatibility. |
Applications
| Portable Medical Sensors | Cellular Handset Power Sequencing |
|---|---|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable reset during battery voltage sag below 4.5V. IC Role / Device Role / Timing Role: Supervisory circuit asserts active-low reset to the sensor's ARM Cortex-M0+ MCU until VCC recovers above 4.632V and sustains reset for ≥150ms. Use Value: Prevents MCU lockup or corrupted ADC readings during marginal battery operation while consuming only 1µA between events. |
Use Scenario: Dual-rail smartphone PMIC powering application processor and baseband IC, where 4.5V LDO output must stabilize before core logic release. IC Role / Device Role / Timing Role: Monitors 4.5V rail and generates timed reset pulse to coordinate power-on sequence across multiple voltage domains. Use Value: Eliminates need for RC-based reset timers; guarantees deterministic 150ms minimum hold time with zero component count increase. |
| Industrial Handheld Terminals | Low-Power IoT Edge Nodes |
Use Scenario: Ruggedized barcode scanner operating from Li-ion pack with aging-related voltage droop during motor activation. IC Role / Device Role / Timing Role: Detects VCC falling below 4.433V and holds reset for ≥150ms post-recovery to ensure complete bootloader execution before application launch. Use Value: Maintains functional safety compliance by preventing partial firmware execution during unstable supply conditions. |
Use Scenario: NB-IoT sensor node sleeping at 200nA, waking every 10 minutes to transmit data - reset must survive cold temperature (-40°C) battery discharge. IC Role / Device Role / Timing Role: Provides −40°C to +125°C guaranteed threshold accuracy and 150ms timeout to validate power integrity before RF transmission. Use Value: Enables single-supervision IC across wide ambient range without derating or margining, reducing BOM cost and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6466UR45+ | SOT23-3 package (same pinout), identical electrical specs, but different thermal resistance (320mW vs SC70's 228.6mW) and slightly larger footprint (2.9mm × 1.6mm vs 2.0mm × 2.1mm). | Better suited for higher ambient temperature PCB layouts with more copper area; less optimal for ultra-compact wearables. | Select MAX6466UR45+ when board space permits larger package and thermal performance is prioritized over minimal footprint. |
| TPS3808G33DBVR | Texas Instruments part with 3.3V threshold, push-pull active-low output, 200ms timeout, and 1.1µA ICC - no 4.5V option; requires external pull-down for open-drain emulation. | Designed for 3.3V systems; not drop-in for 4.5V monitoring; lacks native open-drain flexibility. | Choose TPS3808G33DBVR only if redesigning for 3.3V rail supervision and push-pull drive suffices; not a functional substitute for MAX6466XR45+'s 4.5V/open-drain combination. |
Compared with MAX6466XR45+, MAX6466UR45+ offers identical functionality in a thermally robust SOT23-3 package, while TPS3808G33DBVR serves a different voltage tier and output architecture - neither is pin-compatible, but both address adjacent supervisory needs in cost- or thermal-sensitive designs.
Availability
MAX6466XR45+ is available at Aetrix Electronics and suitable for portable medical devices, cellular handsets, industrial handheld terminals, and low-power IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6466XR45+ 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 high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, communications, and consumer applications.
The MAX6461–MAX6466 family was designed specifically for ultra-low-power voltage monitoring and µP reset generation in space-constrained, battery-operated systems - delivering precision thresholds, guaranteed timeout periods, and minimal quiescent current without external components.
FAQ
What is the exact voltage threshold of MAX6466XR45+ and how does it vary with temperature?
The MAX6466XR45+ has a nominal lower trip threshold (VTH−) of 4.500V at +25°C, with a minimum of 4.433V and maximum of 4.568V at that temperature. Over the full −40°C to +125°C range, VTH− remains within ±2.5% of nominal (4.388V to 4.613V), as confirmed in Table 1a of the datasheet. This tight tolerance eliminates need for field calibration.
Does MAX6466XR45+ provide a fixed reset timeout, and what is its guaranteed minimum duration?
Yes, MAX6466XR45+ guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+, with typical and maximum values of 260ms and 430ms respectively. This timeout is internally generated and independent of VCC slew rate, ensuring reliable microcontroller initialization across varying power-up conditions.
What output configuration does MAX6466XR45+ use, and why is it beneficial?
MAX6466XR45+ uses an open-drain active-low output. This allows the OUT pin to be pulled up to any voltage rail ≤6V, enabling seamless interface with mixed-voltage systems - for example, supervising a 4.5V supply while driving a 1.8V or 3.3V microcontroller reset input without level translators.
Can MAX6466XR45+ operate from a 1.2V supply, and what is its supply current at low voltage?
Yes, MAX6466XR45+ operates from 1.2V to 6.0V per Absolute Maximum Ratings and Electrical Characteristics tables. At VCC = 1.2V and TA = −40°C to +125°C, supply current is not explicitly specified, but at 3.6V it is 1.0µA typical - confirming suitability for ultra-low-voltage battery monitoring where headroom is minimal.
Is MAX6466XR45+ pin-compatible with other members of the MAX6461–MAX6466 family in SC70-3 package?
Yes, all SC70-3 variants in the MAX6461–MAX6466 family - including MAX6466XR45+ - share identical pinout (OUT, GND, VCC) and footprint. However, functional differences exist: MAX6466XR45+ is a µP supervisory circuit with 150ms timeout and open-drain output, whereas MAX6461XR45+ is a voltage detector without timeout and may have push-pull output.
MAX6466XR45+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- 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
MAX6466XR45+ FAQ
1.How can I place an order for MAX6466XR45+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6466XR45+ 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 MAX6466XR45+ reliable?
The price and inventory of MAX6466XR45+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6466XR45+ is usually 5 days.
3.What payment methods are accepted for MAX6466XR45+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6466XR45+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6466XR45+?
MAX6466XR45+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6466XR45+ 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 MAX6466XR45+?
For technical support, including MAX6466XR45+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6466XR45+ requirements.
6.How does Aetrix verify that MAX6466XR45+ is sourced from the original manufacturer or authorized distributors?
All MAX6466XR45+ 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 MAX6466XR45+ meets industry standards.
7.What is the process for return or replacement of MAX6466XR45+?
All MAX6466XR45+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6466XR45+, 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 MAX6466XR45+ part is unused and in its original packaging.
Return procedure for MAX6466XR45+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6466XR45+ Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
Microchip Technology
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MCP111T-300E/TT
Microchip Technology
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MCP120T-315I/TT
Microchip Technology
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MCP809T-315I/TT
Microchip Technology
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