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Analog Devices Inc./Maxim Integrated MAX6464UR45+T
- Part No.:
- MAX6464UR45+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6464UR45+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,688
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Product details
Overview
MAX6464UR45+T from Maxim Integrated is a micropower supervisory circuit with active-high push-pull output, 4.5V lower trip threshold (VTH− = 4.433V typ), 150ms minimum reset timeout, ±2.5% threshold accuracy over −40°C to +125°C, and 1.0µA supply current at 3.6V. It monitors VCC in battery-powered microcontroller systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6464UR45+T datasheet, MAX6464UR45+T pinout, MAX6464UR45+T application, or MAX6464UR45+T equivalent, key selection criteria include guaranteed 150ms reset assertion after VCC recovery, internal 5% hysteresis (VTH+ = 4.632V typ), SC70-3 package compatibility, and operation down to 1.2V supply voltage.
Technical Context
The MAX6464UR45+T implements a precision bandgap reference and comparator with factory-trimmed resistor networks to set VTH− = 4.433V (±2.5%) and VTH+ = VTH− × 1.05. Its internal timeout circuit ensures reset remains asserted for ≥150ms after VCC exceeds VTH+, independent of transient duration.
It features 5% internal hysteresis to prevent chatter near threshold, immunity to short VCC transients (e.g., ≤18µs at 100mV overdrive), and operates across the full industrial temperature range (−40°C to +125°C) with no external components required.
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−) | 4.433V (typ), ±2.5% over −40°C to +125°C - precise detection of 4.5V rail undervoltage |
| Upper Threshold (VTH+) | 4.632V (typ), 5% hysteresis - prevents false releases during noisy or slowly recovering supplies |
| Reset Timeout Period | 150ms (min), 260ms (typ), 430ms (max) - guarantees MCU reset hold time meets ARM/Cortex boot requirements |
| Operating Voltage Range | 1.2V to 6.0V - supports operation during deep brownout and compatibility with Li+ and multi-cell battery inputs |
| Output Type | Push-pull, active-high - drives standard CMOS inputs directly without pull-up resistors |
| Propagation Delay | Not specified for MAX6464 series - timeout dominates timing behavior; threshold detection is secondary to reset timing guarantee |
Pinout & Package
MAX6464UR45+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 is OUT, Pin 2 is GND, Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Active-high push-pull reset output | Drives MCU RESET# input high during fault; asserts low only when VCC < VTH−, then holds low ≥150ms after VCC > VTH+ |
| GND (Pin 2) | Ground reference | Return path for internal bandgap, comparator, and output stage; must be low-impedance connection to system ground plane |
| VCC (Pin 3) | Supply and monitored voltage input | Both powers the device and serves as the monitored rail; valid from 1.2V to 6.0V; no separate sense pin required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1.0µA supply current | Enables continuous supervision in coin-cell–powered devices for >10 years without battery replacement |
| Factory-set 4.5V threshold with ±2.5% accuracy | Eliminates calibration overhead and external resistor dividers for 4.5V logic supply monitoring |
| Internal 150ms minimum reset timeout | Meets JEDEC JESD78 and ARM CoreBoot minimum reset pulse width requirements without RC timing networks |
| 5% internal hysteresis (VTH+ = VTH− × 1.05) | Prevents oscillatory reset assertion during slow-rising or noisy power rails, improving system robustness |
| −40°C to +125°C operating range | Validated for automotive under-hood, industrial control, and medical portable equipment environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with CR2032 coin cell powering an ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-high reset to hold MCU in reset until 4.5V rail stabilizes post-battery insertion or cold start. Use Value: 1.0µA quiescent current extends battery life beyond 36 months; 150ms timeout ensures ADC and RF subsystems fully initialize before firmware execution. |
Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V DC input converted to 4.5V logic rail for FPGA and communication ICs. IC Role / Device Role / Timing Role: Brownout detector monitoring the 4.5V domain and generating a synchronized reset pulse upon undervoltage event. Use Value: ±2.5% threshold accuracy prevents spurious resets during line fluctuations; SC70-3 footprint saves PCB area in dense I/O module layouts. |
| Automotive Telematics Units | Smart Energy Meters |
Use Scenario: LTE-connected vehicle tracking unit powered by 12V automotive battery with wide transient range (6V–16V). IC Role / Device Role / Timing Role: Resets application processor when 4.5V LDO output drops below 4.433V due to cranking or load dump conditions. Use Value: Immunity to ≤18µs transients avoids false resets during engine start; −40°C to +125°C rating covers under-dash mounting locations. |
Use Scenario: ANSI C12.20-compliant electricity meter using a 4.5V rail to power metrology ASIC and secure element. IC Role / Device Role / Timing Role: Provides deterministic reset timing to ensure cryptographic keys are reloaded only after stable power is confirmed. Use Value: Guaranteed 150ms minimum timeout satisfies metering firmware boot sequence timing; lead-free +T packaging meets RoHS/REACH compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6465UR45+T | Active-low push-pull output; identical threshold, timeout, and quiescent current | Requires inverted reset logic on host MCU; compatible with systems where RESET# is active-low | Select when interfacing with MCUs that require active-low reset assertion (e.g., most ARM Cortex-M series) |
| TPS3808G33DBVR | 3.3V fixed threshold; 200ms min timeout; 2.5µA ICC; SOT23-6 package | Not pin-compatible; requires PCB redesign; lacks 4.5V threshold option | Consider only if 3.3V rail supervision is needed and higher supply current is acceptable |
Compared with MAX6464UR45+T, MAX6465UR45+T offers identical supervision timing and accuracy but inverted logic polarity-ideal for active-low reset architectures-while TPS3808G33DBVR targets different voltage domains and cannot substitute without layout changes and firmware adaptation.
Availability
MAX6464UR45+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive telematics units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6464UR45+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 low-power, high-reliability solutions.
The MAX6461–MAX6466 family was engineered specifically for battery-powered and industrial systems needing guaranteed reset timing, ultra-low quiescent current, and factory-trimmed voltage thresholds-eliminating external components in space- and power-constrained designs.
FAQ
What is the exact voltage threshold of MAX6464UR45+T?
The MAX6464UR45+T has a factory-trimmed lower trip threshold (VTH−) of 4.433V (typical) at +25°C, with guaranteed range of 4.388V to 4.613V over −40°C to +125°C. Its upper threshold (VTH+) is 4.632V (typ), providing 5% hysteresis per VTH+ = VTH− × 1.05. This matches the "45" suffix in the part number per Table 1a of the datasheet.
Does MAX6464UR45+T require external components to operate?
No, MAX6464UR45+T requires no external components. Its precision bandgap reference, comparator, trimmed resistor network, and timeout circuit are fully integrated. The device operates with only VCC, GND, and the active-high push-pull OUT connected directly to the host MCU's reset input-no pull-up resistors, capacitors, or voltage dividers are needed.
What is the reset timeout behavior of MAX6464UR45+T during power-up?
Upon initial power-up, MAX6464UR45+T asserts its active-high output only after VCC rises above VTH+ (4.632V typ); it then holds the output high for a minimum of 150ms regardless of subsequent VCC stability. This ensures the host MCU receives a clean, guaranteed-duration reset pulse before executing code, satisfying JEDEC and ARM boot timing requirements.
Can MAX6464UR45+T monitor voltages below 1.2V?
No, MAX6464UR45+T has a specified operating voltage range of 1.2V to 6.0V. Below 1.2V, the internal bandgap reference and comparator may not function reliably, and the datasheet does not guarantee performance. For sub-1.2V monitoring, alternative supervisors such as the MAX6461 series with lower thresholds (e.g., 1.6V) or specialized ultra-low-voltage detectors are required.
Is MAX6464UR45+T pin-compatible with other packages in the MAX6464 family?
MAX6464UR45+T uses the SC70-3 package (3-pin). It is not pin-compatible with the SOT23-3 (MAX6464UR45+T shares same pinout) or SOT23-5 variants-the latter adds N.C. and second GND pins. While SC70-3 and SOT23-3 share identical 3-pin assignment (OUT-GND-VCC), their footprints differ mechanically and require separate PCB land patterns.
MAX6464UR45+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.5V
- 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
MAX6464UR45+T FAQ
1.How can I place an order for MAX6464UR45+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6464UR45+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 MAX6464UR45+T reliable?
The price and inventory of MAX6464UR45+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6464UR45+T is usually 5 days.
3.What payment methods are accepted for MAX6464UR45+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6464UR45+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6464UR45+T?
MAX6464UR45+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6464UR45+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 MAX6464UR45+T?
For technical support, including MAX6464UR45+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6464UR45+T requirements.
6.How does Aetrix verify that MAX6464UR45+T is sourced from the original manufacturer or authorized distributors?
All MAX6464UR45+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 MAX6464UR45+T meets industry standards.
7.What is the process for return or replacement of MAX6464UR45+T?
All MAX6464UR45+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6464UR45+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 MAX6464UR45+T part is unused and in its original packaging.
Return procedure for MAX6464UR45+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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