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Analog Devices Inc./Maxim Integrated MAX6464XR31+T
- Part No.:
- MAX6464XR31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6464XR31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,172
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Product details
Overview
MAX6464XR31+T from Maxim Integrated is a micropower supervisory circuit with active-high push-pull output, 3.1V lower trip threshold (VTH−), ±2.5% threshold accuracy over −40°C to +125°C, 150ms minimum reset timeout, and 1.0µA supply current at 3.6V - used for reliable power-on reset assertion in battery-powered microcontroller systems.
For engineers reviewing the MAX6464XR31+T datasheet, MAX6464XR31+T pinout, MAX6464XR31+T application, or MAX6464XR31+T equivalent, key selection criteria include guaranteed 150ms reset pulse width, internal 5% hysteresis (VTH+ = VTH− × 1.05), SC70-3 package compatibility, and immunity to sub-20µs VCC transients at 3.1V threshold overdrive.
Technical Context
The MAX6464XR31+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 3.100V (±2.5%) and VTH+ = 3.255V. Its internal timeout circuit ensures reset remains asserted ≥150ms after VCC exceeds VTH+, independent of input slew rate.
This device operates across 1.2V–6.0V supply range, draws only 1.0µA typical ICC at 3.6V/25°C, and maintains functional integrity down to −40°C with no external components required - enabling direct integration into space-constrained, ultra-low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 6.0V - supports operation from single-cell Li⁺ (3.0V) to 5V rail without external regulation |
| Threshold Voltage (VTH−) | 3.100V ±2.5% (−40°C to +125°C) - precise detection of 3.3V system brownout |
| Reset Timeout Period | 150ms minimum - guarantees sufficient hold time for µP initialization before release |
| Supply Current (ICC) | 1.0µA typical at 3.6V/25°C - enables multi-year battery life in always-on monitoring |
| Output Type | Push-pull, active-high - drives CMOS inputs directly without pull-up resistor |
| Threshold Hysteresis | 5% (VTH+ = VTH− × 1.05) - prevents chatter during slow-rising/falling VCC near trip point |
| Propagation Delay | Not specified for MAX6464 series - timeout dominates timing behavior, not comparator delay |
Pinout & Package
MAX6464XR31+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Active-high push-pull reset output - asserts high during VCC < 3.1V and holds ≥150ms after VCC > 3.255V |
| 2 | GND | Ground reference - must be connected to system ground plane for stable threshold reference |
| 3 | VCC | Supply voltage and monitored input - powers device and provides voltage under supervision |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1.0µA max at 3.6V - reduces quiescent load on primary battery by >99% vs. discrete solutions |
| Factory-set threshold | VTH− = 3.100V (suffix "31") - eliminates calibration labor and BOM cost of external resistors |
| Internal reset timeout | 150ms min - ensures deterministic µP startup timing without external RC network |
| 5% hysteresis | VTH+ = VTH− × 1.05 - suppresses false resets caused by noise or ripple near threshold |
| Transient immunity | Immune to ≤20µs glitches at 100mV overdrive - rejects ESD-induced supply dips |
Applications
| Battery-Powered Microcontroller Reset | Low-Voltage Load Switch Control |
|---|---|
|
Use Scenario: Monitoring 3.3V supply in portable medical sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high RESET signal to ARM Cortex-M0+ during brownout and holding ≥150ms post-recovery. Use Value: Prevents firmware corruption by guaranteeing full µP reset sequence even under shallow, transient voltage sags. |
Use Scenario: Enabling/disabling a 3.3V LDO regulator based on main battery voltage level. IC Role / Device Role / Timing Role: Threshold detector driving gate of external P-MOSFET load switch via active-high OUT. Use Value: Eliminates need for op-amp comparator and RC timing network - reduces component count by 4×. |
| Industrial Sensor Node Power Sequencing | Wireless IoT Edge Device Supervision |
|
Use Scenario: Coordinating power-up of RF transceiver and analog front-end in LoRaWAN end-node. IC Role / Device Role / Timing Role: Generating synchronized reset pulse to ensure analog subsystem stabilizes before digital core initializes. Use Value: Avoids metastability in ADC sampling clocks by enforcing strict 150ms minimum delay between VCC rise and µP release. |
Use Scenario: Ensuring reliable boot in NB-IoT module operating on intermittent solar-charged LiPo. IC Role / Device Role / Timing Role: Brownout detector with hysteresis preventing oscillatory reset during partial charge cycles. Use Value: Enables robust operation down to 2.8V VCC while rejecting 10µs switching noise from DC/DC converter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6465XR31+T | Active-low push-pull output; identical threshold, timeout, and supply specs | Requires inverted logic interface - unsuitable where host µP expects active-high reset | Select when system design uses active-low reset input or level-shifting is already present |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.1µA ICC - same SC70-3 footprint but no hysteresis trim | Lacks factory-set 5% hysteresis; requires external resistor for hysteresis if needed | Choose for cost-sensitive designs where ±3% threshold tolerance suffices and hysteresis is optional |
Compared with MAX6464XR31+T, MAX6465XR31+T offers identical supervision timing but inverted polarity, while TPS3808G33DBVR trades hysteresis integration and tighter threshold accuracy for marginally longer timeout and broader vendor availability.
Availability
MAX6464XR31+T is available at Aetrix Electronics and suitable for battery-powered microcontroller reset, low-voltage load switching, and industrial sensor node power sequencing requiring stable component supply across extended temperature ranges.
Supply support for MAX6464XR31+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 management, sensing, and interface applications in harsh environments.
The MAX6461–MAX6466 family was engineered specifically for ultra-low-power, high-reliability voltage supervision in portable and industrial systems where size, current budget, and temperature resilience are critical.
FAQ
What is the exact lower threshold voltage (VTH−) of the MAX6464XR31+T?
The MAX6464XR31+T has a factory-trimmed lower trip threshold of 3.100V at +25°C, with guaranteed tolerance of ±2.5% across −40°C to +125°C per Table 1a. This corresponds to suffix "31" in the part number and is laser-trimmed during production to eliminate external resistor calibration.
Does the MAX6464XR31+T require an external pull-up resistor on its output?
No. The MAX6464XR31+T features a push-pull, active-high output stage that actively drives high or low - no external pull-up resistor is needed. This distinguishes it from open-drain variants like MAX6466XR31+T and simplifies PCB layout.
What is the minimum reset timeout period guaranteed for the MAX6464XR31+T?
The MAX6464XR31+T guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+ (3.255V). This is an internal timer function - not dependent on external components - and remains valid across the full −40°C to +125°C operating range.
Can the MAX6464XR31+T operate with supply voltages below 1.6V?
Yes. Although its nominal threshold range starts at 1.6V, the MAX6464XR31+T functions across VCC = 1.2V to 6.0V per Absolute Maximum Ratings. However, output sinking capability degrades below 1.0V, so valid logic levels are ensured only down to ~1.2V.
How does the internal hysteresis of the MAX6464XR31+T improve system reliability?
The MAX6464XR31+T incorporates fixed 5% hysteresis (VTH+ = VTH− × 1.05), meaning it asserts reset at 3.100V but releases only at 3.255V. This prevents output oscillation during noisy or slowly recovering supplies - a critical feature for stable µP boot sequences in electrically hostile environments.
MAX6464XR31+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:
- 3.1V
- 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
MAX6464XR31+T FAQ
1.How can I place an order for MAX6464XR31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6464XR31+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 MAX6464XR31+T reliable?
The price and inventory of MAX6464XR31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6464XR31+T is usually 5 days.
3.What payment methods are accepted for MAX6464XR31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6464XR31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6464XR31+T?
MAX6464XR31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6464XR31+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 MAX6464XR31+T?
For technical support, including MAX6464XR31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6464XR31+T requirements.
6.How does Aetrix verify that MAX6464XR31+T is sourced from the original manufacturer or authorized distributors?
All MAX6464XR31+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 MAX6464XR31+T meets industry standards.
7.What is the process for return or replacement of MAX6464XR31+T?
All MAX6464XR31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6464XR31+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 MAX6464XR31+T part is unused and in its original packaging.
Return procedure for MAX6464XR31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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