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Analog Devices Inc./Maxim Integrated MAX6464UR23+T
- Part No.:
- MAX6464UR23+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6464UR23+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:316
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Product details
Overview
MAX6464UR23+T from Maxim Integrated is a micropower supervisory circuit with active-low push-pull output, 2.3V lower trip threshold (VTH−), and guaranteed 150ms minimum reset timeout period. It monitors VCC supply voltage in battery-powered systems, asserts reset when VCC drops below 2.243V (min, −40°C to +125°C), and holds reset for ≥150ms after VCC rises above 2.358V (max, −40°C to +125°C). Designed for portable medical devices and low-voltage microcontroller power sequencing.
For engineers reviewing the MAX6464UR23+T datasheet, MAX6464UR23+T pinout, MAX6464UR23+T application, or MAX6464UR23+T equivalent, key selection criteria include its 1.0µA supply current at 3.6V, ±2.5% threshold accuracy over temperature, internal 5% hysteresis, −40°C to +125°C operation, and SOT23-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6464UR23+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set its factory-trimmed 2.3V detection threshold. Its internal hysteresis circuit ensures VTH+ = VTH− × 1.05, yielding a nominal upper threshold of 2.415V at +25°C.
This device operates as a µP reset supervisor-not a simple voltage detector-by incorporating a built-in timer that guarantees minimum 150ms reset assertion after VCC recovery. Its push-pull active-low output drives logic directly without external pull-up components, supporting immediate system initialization upon power stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 1.0µA at 3.6V - enables multi-year battery life in always-on monitoring applications |
| Lower Threshold (VTH−) | 2.243V (min) to 2.358V (max) over −40°C to +125°C - ensures reliable reset initiation across automotive and industrial temperature ranges |
| Upper Threshold (VTH+) | 2.343V (min) to 2.464V (max) over −40°C to +125°C - defines precise release point with 5% hysteresis to prevent chatter near threshold |
| Reset Timeout Period | 150ms (min) to 430ms (max) - guarantees sufficient time for microcontroller core and peripherals to stabilize before release |
| Threshold Accuracy | ±2.5% over full temperature range - eliminates need for external calibration in production |
| Operating Voltage Range | 1.2V to 6.0V - supports direct monitoring of Li⁺, NiMH, and regulated 3.3V/5V rails |
| Propagation Delay | Not specified for MAX6464 series - timeout behavior dominates timing response, not edge-triggered delay |
Pinout & Package
MAX6464UR23+T is housed in a lead-free 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.45mm height. Pin 1 = OUT (active-low push-pull), Pin 2 = GND, Pin 3 = VCC. The package is rated for −40°C to +125°C operation and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Active-low push-pull reset output | Drives CMOS/TTL inputs directly; sinks ≥1mA at 0.3V (VCC ≥ 1.2V); no external pull-up required |
| 2 (GND) | Ground reference | Primary return path for internal bandgap and comparator; must be low-impedance connection to system ground plane |
| 3 (VCC) | Supply input and monitored voltage rail | Simultaneously powers the IC and serves as the sensed voltage source; accepts 1.2V–6.0V with ultra-low ICC draw |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA at 3.6V - extends shelf life and runtime in coin-cell–powered IoT sensors |
| Factory-trimmed 2.3V threshold | VTH− = 2.300V (typ) with ±2.5% tolerance over −40°C to +125°C - removes need for external resistive dividers or trimming |
| Guaranteed 150ms reset timeout | Minimum assertion duration after VCC recovery - ensures deterministic MCU boot even during brownout recovery |
| Internal 5% hysteresis | VHYST = [(VTH+) − (VTH−)] / VTH− × 100% = 4.5% to 6.0% - prevents oscillation during slow-rising or noisy supply conditions |
| No external components required | Self-contained supervision - eliminates BOM cost, layout area, and calibration labor for basic reset functionality |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) powered by CR2032 coin cell, requiring reliable power-on reset and brownout protection during battery depletion. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to MSP430F2xx MCU until VCC stabilizes above 2.358V and holds reset for ≥150ms. Use Value: Prevents erratic MCU execution during weak-battery startup; 1.0µA ICC extends usable battery life by >18 months versus higher-current supervisors. |
Use Scenario: ECG patch with Bluetooth LE radio, where intermittent RF transmission causes transient supply droop on 3.0V LDO output. IC Role / Device Role / Timing Role: Reset supervisor detecting VCC dips below 2.243V and enforcing 150ms minimum reset pulse to ensure clean BLE controller reboot. Use Value: Eliminates firmware lockups caused by marginal supply transients; ±2.5% threshold accuracy avoids false resets at temperature extremes. |
| Industrial Handheld Terminals | Smart Meter Battery Backup Circuits |
Use Scenario: Ruggedized barcode scanner operating in warehouses from −25°C to +70°C, powered by rechargeable Li-ion pack with aging-related voltage sag. IC Role / Device Role / Timing Role: Voltage supervisor monitoring main 3.6V rail and triggering hardware reset when cell voltage falls below 2.3V threshold during cold-start. Use Value: Maintains functional safety compliance (IEC 62368) by guaranteeing deterministic reset under worst-case temperature and aging conditions. |
Use Scenario: AMI smart meter with supercapacitor backup, where primary 3.3V supply may collapse during grid outage and require controlled switchover. IC Role / Device Role / Timing Role: Supervisory circuit holding µP in reset while backup capacitor discharges below 2.3V, then releasing after 150ms stabilization on restored main supply. Use Value: Enables seamless transition between primary and backup power domains without data corruption or register loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP reset supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6465UR23+T | Active-high push-pull output instead of active-low; identical threshold, timeout, and supply current | Requires inverted reset logic handling in host MCU or companion logic; unsuitable for systems expecting active-low reset assertion | Select MAX6465UR23+T only when existing schematic or firmware assumes active-high reset signaling |
| TPS3123QDBVRQ1 | Automotive-grade (AEC-Q100), 2.33V threshold, 200ms min timeout, 2.5µA ICC - higher current and tighter AEC spec | Qualified for under-hood automotive use; overqualified for consumer/portable applications due to cost and current penalty | Choose TPS3123QDBVRQ1 only for automotive designs requiring AEC-Q100 qualification and higher temperature margin |
Compared with MAX6464UR23+T, MAX6465UR23+T offers identical supervision timing but inverted polarity, while TPS3123QDBVRQ1 adds AEC-Q100 qualification and longer timeout at the cost of 2.5× higher supply current - making MAX6464UR23+T optimal for cost- and power-sensitive portable electronics.
Availability
MAX6464UR23+T is available at Aetrix Electronics and suitable for portable medical devices, wearable health monitors, and industrial handheld terminals requiring stable component supply with guaranteed long-term availability and lead-free compliance.
Supply support for MAX6464UR23+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 high-reliability, low-power solutions for demanding environments.
The MAX6461–MAX6466 family was developed specifically for ultra-low-power reset supervision in battery-critical systems, integrating precision threshold detection, hysteresis, and timeout functionality into minimal-footprint packages without external components.
FAQ
What is the exact lower voltage threshold (VTH−) of MAX6464UR23+T over temperature?
The MAX6464UR23+T has a factory-set lower trip threshold of 2.300V (typical at +25°C), with guaranteed minimum of 2.243V and maximum of 2.358V across the full −40°C to +125°C operating range. This ±2.5% accuracy is maintained without external calibration, enabling robust reset behavior in wide-temperature applications like automotive telematics or outdoor IoT sensors.
Does MAX6464UR23+T require an external pull-up resistor on its OUT pin?
No, MAX6464UR23+T does not require an external pull-up resistor because it features a push-pull active-low output stage. The OUT pin actively drives low (≤0.3V at 1mA sink) when asserted and actively drives high (≥0.8 × VCC) when released, eliminating reliance on external biasing components and simplifying PCB layout for space-constrained designs.
How long does the reset signal remain asserted after VCC recovers above the upper threshold?
The MAX6464UR23+T guarantees a minimum reset timeout period of 150ms after VCC rises above VTH+, with typical values up to 260ms and maximum up to 430ms depending on process and temperature. This fixed-duration assertion ensures microcontrollers complete internal initialization sequences before release, independent of VCC ramp rate or noise.
Can MAX6464UR23+T operate from a 1.5V supply?
Yes, MAX6464UR23+T operates down to 1.2V supply voltage, making it compatible with 1.5V alkaline or NiMH cells. However, its 2.3V threshold means it will assert reset continuously below ~2.24V - so it functions correctly as a supervisor only when VCC is ≥2.3V. For true 1.5V rail monitoring, a lower-threshold variant (e.g., MAX6464UR16+T) is required.
Is MAX6464UR23+T pin-compatible with other devices in the MAX6461–MAX6466 family?
Yes, MAX6464UR23+T shares identical SOT23-3 pinout (OUT-GND-VCC) with all MAX646xURxx+T variants, including MAX6461UR23+T, MAX6462UR23+T, and MAX6465UR23+T. This allows drop-in replacement for different output types (push-pull low/high, open-drain) or timeout requirements, provided the host design accommodates the respective output polarity and timing behavior.
MAX6464UR23+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.3V
- 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:
- SOT-23-3
MAX6464UR23+T FAQ
1.How can I place an order for MAX6464UR23+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6464UR23+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 MAX6464UR23+T reliable?
The price and inventory of MAX6464UR23+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6464UR23+T is usually 5 days.
3.What payment methods are accepted for MAX6464UR23+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6464UR23+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6464UR23+T?
MAX6464UR23+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6464UR23+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 MAX6464UR23+T?
For technical support, including MAX6464UR23+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6464UR23+T requirements.
6.How does Aetrix verify that MAX6464UR23+T is sourced from the original manufacturer or authorized distributors?
All MAX6464UR23+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 MAX6464UR23+T meets industry standards.
7.What is the process for return or replacement of MAX6464UR23+T?
All MAX6464UR23+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6464UR23+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 MAX6464UR23+T part is unused and in its original packaging.
Return procedure for MAX6464UR23+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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