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Analog Devices Inc./Maxim Integrated MAX6464XR39+
- Part No.:
- MAX6464XR39+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6464XR39+.pdf
- Description:
- MAX6464 ULTRA-LOW-POWER VOLTAGE
- Quantity:
- Payment:
- Shipping:
Inventory:2,060
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Product details
Overview
MAX6464XR39+ from Maxim Integrated is a micropower supervisory circuit with active-low push-pull output, 3.9V lower trip threshold (VTH− = 3.842V typ), 150ms minimum reset timeout period, and ±2.5% threshold accuracy over −40°C to +125°C. It monitors VCC supply voltage in battery-powered microcontroller systems, asserting reset for ≥150ms after VCC recovers above VTH+ = 4.014V (typ) to prevent premature restart during power-up instability.
For engineers reviewing the MAX6464XR39+ datasheet, MAX6464XR39+ pinout, MAX6464XR39+ application, or MAX6464XR39+ equivalent, key selection criteria include guaranteed 150ms reset assertion time, ultra-low 1.0µA supply current at 3.6V, internal 5% hysteresis, immunity to short VCC transients, and SC70-3 package compatibility with space-constrained portable designs.
Technical Context
The MAX6464XR39+ implements a precision bandgap reference and comparator with internally trimmed resistor networks to set fixed VTH− = 3.842V (±2.5%) and VTH+ = 4.014V (VTH− × 1.05). Its reset timeout logic ensures output remains asserted for ≥150ms after VCC exceeds VTH+, independent of input slew rate.
It features internal 5% hysteresis to prevent chatter near threshold, operates from 1.2V to 6.0V supply, and delivers push-pull active-low output with VOL ≤ 0.3V at ISINK = 1.0mA (VCC ≥ 1.2V) and VOH ≥ 0.8×VCC at ISOURCE = 1.5mA (VCC ≥ 1.8V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.0µA at VCC = 3.6V, TA = −40°C to +125°C - enables multi-year battery life in always-on monitoring applications. |
| Lower Threshold (VTH−) | 3.842V (typ), 3.803V to 3.998V (−40°C to +125°C) - precisely targets 3.9V nominal supply rails for reliable brownout detection. |
| Upper Threshold (VTH+) | 4.014V (typ), VTH− × 1.05 - defines minimum recovery voltage before reset deassertion, ensuring stable power-up. |
| Reset Timeout Period | 150ms (min), 260ms (typ), 430ms (max) - guarantees MCU reset hold time sufficient for oscillator stabilization and firmware initialization. |
| Threshold Accuracy | ±2.5% over −40°C to +125°C - eliminates need for external calibration in automotive and industrial environments. |
| Hysteresis | 5% (fixed, internal) - prevents output oscillation during slow-rising/falling VCC transitions near threshold. |
| Propagation Delay | Not specified for MAX6464 series - timeout behavior dominates timing; no propagation delay spec provided in datasheet. |
Pinout & Package
MAX6464XR39+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts in portable electronics. Pin 1 is OUT (active-low push-pull), Pin 2 is GND, and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Active-low push-pull reset output | Drives low during reset condition; actively pulls high when not asserted - no external pullup required, compatible with 1.8V–5.5V logic interfaces. |
| 2 (GND) | Ground reference | Primary return path for internal circuitry and output stage; must be connected to system ground plane for accurate threshold sensing. |
| 3 (VCC) | Supply voltage and monitored input | Provides operating power and serves as the voltage being supervised; valid range 1.2V–6.0V; threshold accuracy specified from 1.6V–5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.0µA at 3.6V enables >10-year coin-cell operation in wireless sensors and wearables. |
| Factory-trimmed 3.9V threshold | VTH− = 3.842V (±2.5%) eliminates external resistors and calibration, reducing BOM count and layout area. |
| Guaranteed 150ms reset timeout | Ensures MCU reset remains active long enough for clock stabilization and register initialization, even under fast VCC rise times. |
| Internal 5% hysteresis | Prevents false resets during noisy or slowly recovering power rails without requiring external components. |
| SC70-3 package | 2.0mm × 2.1mm footprint supports miniaturized designs in handheld medical devices and IoT endpoints. |
Applications
| Precision Battery Monitoring | Noise-Immune µP Reset Circuits |
|---|---|
|
Use Scenario: Monitoring Li-ion battery voltage during discharge to trigger graceful shutdown before deep discharge. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset when battery drops below 3.842V, holding reset for ≥150ms after recovery to 4.014V. Use Value: Prevents data corruption and flash write errors by ensuring MCU remains held in reset until battery voltage stabilizes above safe operating level. |
Use Scenario: Providing robust reset signal to an ARM Cortex-M0 microcontroller in an automotive body control module exposed to load-dump transients. IC Role / Device Role / Timing Role: Voltage supervisor detecting VCC dips below 3.842V and asserting reset for ≥150ms, with immunity to sub-20µs transients per typical characteristics. Use Value: Eliminates need for RC-based reset circuits and external transient suppressors, reducing component count while meeting ISO 7637-2 pulse 1/2a immunity requirements. |
| Portable Medical Devices | Cellular Phones / Cordless Phones |
|
Use Scenario: Ensuring reliable power-on reset for a glucose meter's MCU during cold-start from button-cell battery. IC Role / Device Role / Timing Role: Active-low push-pull reset generator with 150ms timeout, operating down to 1.2V supply and consuming only 1.0µA quiescent current. Use Value: Extends single-button-cell lifetime beyond 2 years while guaranteeing deterministic boot sequence across temperature extremes (−40°C to +85°C). |
Use Scenario: Supervising main PMIC output (3.8V rail) in a dual-SIM smartphone to prevent boot failure during SIM hot-swap or RF power surges. IC Role / Device Role / Timing Role: Dedicated 3.9V supervisor asserting reset on VCC dip, with hysteresis preventing chatter during brief RF-induced supply sag. Use Value: Improves system reliability by eliminating spontaneous reboots caused by transient supply noise, without adding board area or cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6465XR39+ | Identical threshold (3.9V) and timeout (150ms), but features active-high push-pull output instead of active-low. | Requires inverted reset logic in host MCU or external inverter; unsuitable where active-low reset is hardwired. | Select MAX6465XR39+ only if system design mandates active-high reset assertion. |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.8µA ICC, SOT23-5 package - different threshold, longer timeout, higher current, larger footprint. | Not drop-in compatible due to mismatched threshold and 5-pin package; requires PCB redesign and firmware adaptation. | Consider only if 3.3V supervision is needed and SC70-3 footprint constraint is relaxed. |
Compared with MAX6464XR39+, MAX6465XR39+ offers identical performance with inverted polarity, while TPS3808G33DBVR provides longer timeout and higher accuracy at the cost of threshold mismatch and larger packaging - neither is pin-compatible, making MAX6464XR39+ optimal for 3.9V SC70-3 designs requiring active-low reset.
Availability
MAX6464XR39+ is available at Aetrix Electronics and suitable for portable medical devices, cellular phones, and battery-powered microcontroller systems requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6464XR39+ 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 and mixed-signal ICs for power, sensing, and interface applications.
The MAX6461–MAX6466 family was designed specifically for ultra-low-power voltage monitoring and µP reset supervision in space- and energy-constrained portable and industrial systems.
FAQ
What is the exact lower voltage threshold (VTH−) for MAX6464XR39+?
The MAX6464XR39+ has a factory-set lower trip threshold of VTH− = 3.842V (typical) at +25°C, with guaranteed range 3.803V to 3.998V over −40°C to +125°C. This value is derived from Table 1a suffix "39" and confirmed in the Electrical Characteristics table under Voltage Threshold (VTH−) parameter.
Does MAX6464XR39+ provide a reset timeout period, and what is its duration?
Yes, MAX6464XR39+ is a µP supervisory circuit with a minimum reset timeout period of 150ms. The actual timeout ranges from 150ms (min) to 430ms (max) over temperature, with 260ms typical - this ensures the reset signal remains asserted long enough for microcontroller clock stabilization and firmware initialization.
What output configuration does MAX6464XR39+ use, and how is it connected?
MAX6464XR39+ uses an active-low push-pull output configuration. Pin 1 (OUT) drives low during reset and actively drives high when not asserted - no external pullup resistor is required. This simplifies interface with standard CMOS inputs and supports direct connection to microcontrollers expecting active-low reset signals.
What is the supply current consumption of MAX6464XR39+ across temperature?
MAX6464XR39+ consumes 1.0µA typical supply current at VCC = 3.6V and TA = −40°C to +125°C. At VCC = 5.0V and TA = −40°C to +85°C, ICC is 1.3µA to 2.5µA; at +85°C to +125°C, it rises to 3.5µA max - all values confirm ultra-low power operation essential for battery longevity.
Is MAX6464XR39+ compatible with SC70-3 footprint, and what are its thermal limits?
Yes, MAX6464XR39+ is packaged in SC70-3 (2.0mm × 2.1mm) with thermal characteristics specifying continuous power dissipation of 228.6mW at TA = +70°C, derating 2.9mW/°C above that. Its operating temperature range is −40°C to +125°C, and junction temperature must not exceed +150°C - validated for automotive under-hood and industrial edge-node deployments.
MAX6464XR39+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.9V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6464XR39+ FAQ
1.How can I place an order for MAX6464XR39+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6464XR39+ 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 MAX6464XR39+ reliable?
The price and inventory of MAX6464XR39+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6464XR39+ is usually 5 days.
3.What payment methods are accepted for MAX6464XR39+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6464XR39+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6464XR39+?
MAX6464XR39+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6464XR39+ 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 MAX6464XR39+?
For technical support, including MAX6464XR39+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6464XR39+ requirements.
6.How does Aetrix verify that MAX6464XR39+ is sourced from the original manufacturer or authorized distributors?
All MAX6464XR39+ 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 MAX6464XR39+ meets industry standards.
7.What is the process for return or replacement of MAX6464XR39+?
All MAX6464XR39+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6464XR39+, 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 MAX6464XR39+ part is unused and in its original packaging.
Return procedure for MAX6464XR39+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6464XR39+ Tags
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MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
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MCP130T-315I/TT
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MCP120T-475I/TT
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