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Analog Devices Inc./Maxim Integrated MAX6464UR46+T
- Part No.:
- MAX6464UR46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6464UR46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,575
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Product details
Overview
MAX6464UR46+T from Maxim Integrated is a micropower supervisory circuit with 4.6V lower trip threshold (VTH− = 4.600V typ), 150ms minimum reset timeout, and push-pull active-low output in SOT23-3 package. It monitors system supply voltage, asserts reset during brownout, and holds reset for ≥150ms after recovery-enabling reliable power-up sequencing in battery-powered microcontroller systems.
For engineers reviewing the MAX6464UR46+T datasheet, MAX6464UR46+T pinout, MAX6464UR46+T application, or MAX6464UR46+T equivalent, key selection criteria include guaranteed 150ms reset timeout, ±2.5% threshold accuracy over −40°C to +125°C, ultra-low 1.0µA supply current at 3.6V, and immunity to short VCC transients up to 20µs at 4.6V overdrive.
Technical Context
The MAX6464UR46+T implements a precision bandgap reference and comparator with internally trimmed resistor networks to set VTH− = 4.600V (±2.5% over temperature) and VTH+ = 4.830V (5% hysteresis). Its internal timeout circuit ensures reset remains asserted for ≥150ms after VCC rises above VTH+, independent of propagation delay.
It operates from 1.2V to 6.0V supply, draws only 1.0µA at 3.6V/25°C, and features push-pull active-low output capable of sinking 9.0mA at VCC ≥ 4.5V with VOL ≤ 0.4V-enabling direct interface to 3.3V/5V µP reset inputs without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2V to 6.0V - supports operation down to near-dead battery and up to unregulated input rails |
| Lower Threshold (VTH−) | 4.600V (±2.5% over −40°C to +125°C) - precise detection of 5V rail brownout |
| Reset Timeout Period | 150ms min - guarantees sufficient hold time for µP initialization and clock stabilization |
| Supply Current | 1.0µA at 3.6V/25°C - enables multi-year battery life in always-on monitoring applications |
| Output Type | Push-pull, active-low - eliminates need for external pull-up; drives standard CMOS reset inputs directly |
| Propagation Delay | Not specified for MAX6464 series - timeout dominates timing behavior; delay irrelevant for reset assertion |
| Hysteresis | 5% (VTH+ = VTH− × 1.05) - prevents chatter during slow-rising/falling supply transitions |
Pinout & Package
SOT23-3 package: 1.3mm × 2.9mm × 1.0mm body, surface-mount, lead-free (RoHS-compliant), rated for −40°C to +125°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Active-low push-pull reset output; sinks up to 9.0mA at VCC ≥ 4.5V; VOL ≤ 0.4V ensures valid logic low to µP |
| 2 | GND | Ground reference for internal bandgap and comparator; must be connected to system ground plane |
| 3 | VCC | Supply voltage input and monitored rail; powers device and serves as voltage sense node |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0µA at 3.6V - extends battery life in portable medical and IoT edge sensors |
| Preset 4.6V threshold | Factory-trimmed VTH− = 4.600V ±2.5% - eliminates calibration overhead and external resistors |
| Guaranteed 150ms reset timeout | Minimum assertion time after VCC recovery - ensures µP completes internal reset sequence before release |
| 5% internal hysteresis | VTH+ = 4.830V - prevents false resets during noisy or slowly recovering power rails |
| Transient immunity | Rejects VCC glitches ≤20µs at 4.6V overdrive - avoids spurious resets in electrically noisy environments |
Applications
| Battery-Powered Microcontroller Systems | Industrial Sensor Nodes |
|---|---|
Use Scenario: Monitoring 5V supply rail in a remote wireless sensor node powered by Li-ion battery with aging-induced voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M0+ MCU until VCC recovers above 4.83V and holds for ≥150ms. Use Value: Prevents MCU lockup during brownout and ensures deterministic boot after recovery without software intervention. |
Use Scenario: Power sequencing in a DIN-rail mounted temperature transmitter with isolated 24V DC input and internal 5V regulation. IC Role / Device Role / Timing Role: Reset supervisor ensuring analog front-end and digital controller initialize synchronously after cold start or line dip. Use Value: Eliminates need for RC-based reset timers; provides temperature-stable 150ms timeout across full industrial range. |
| Portable Medical Devices | Automotive Body Control Modules |
Use Scenario: Low-power glucose meter with coin-cell battery and LCD display requiring clean power-up sequence. IC Role / Device Role / Timing Role: Active-low reset generator holding MCU in reset until regulated 3.3V rail stabilizes post-brownout. Use Value: 1.0µA supply current enables >5-year shelf life; ±2.5% threshold accuracy ensures consistent trip point across patient-use temperature range. |
Use Scenario: 12V-to-5V converted supply monitoring in automotive door module with load-dump transients. IC Role / Device Role / Timing Role: Brownout detector asserting reset during ISO 7637-2 pulse 4a (slow decay) events. Use Value: Immunity to ≤20µs transients prevents false resets; SOT23-3 footprint minimizes PCB area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V fixed threshold; 200ms timeout; 1.1µA ICC; SOT23-6 package | Designed for 3.3V systems; requires different PCB layout due to 6-pin footprint and different pinout | Select when 3.3V rail supervision is required and board space allows SOT23-6 |
| ADM6315-46DARTZ-RL | 4.6V threshold; 140ms timeout; 2.5µA ICC; SOT23-3; open-drain output | Open-drain output requires external pull-up; shorter timeout may not meet µP requirements | Choose only if open-drain interface is mandatory and 140ms timeout is acceptable per µP datasheet |
Compared with TPS3808G33DBVR and ADM6315-46DARTZ-RL, the MAX6464UR46+T offers the exact 4.6V threshold in compact SOT23-3 with push-pull output-reducing BOM count and simplifying layout-while delivering the longest guaranteed timeout (150ms) among SOT23-3 alternatives.
Availability
MAX6464UR46+T is available at Aetrix Electronics and suitable for battery-powered microcontrollers, industrial sensor nodes, portable medical devices, automotive body electronics, and low-power IoT edge devices requiring stable component supply across extended temperature ranges.
Supply support for MAX6464UR46+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, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.
The MAX6464UR46+T belongs to the MAX6461–MAX6466 family of ultra-low-power supervisory circuits engineered specifically for reliable reset generation in space- and power-constrained embedded systems operating from battery or unregulated supplies.
FAQ
What is the exact voltage threshold of MAX6464UR46+T?
The MAX6464UR46+T has a factory-set lower trip threshold (VTH−) of 4.600V (typical) with ±2.5% accuracy over −40°C to +125°C, and an upper threshold (VTH+) of 4.830V (5% hysteresis). These values are confirmed in Table 1a and 1b of the official datasheet, and apply specifically to the "46" suffix variant of the MAX6464UR+T series.
Does MAX6464UR46+T require external components for basic operation?
No, the MAX6464UR46+T requires no external components for core supervisory function. Its precision bandgap reference, comparator, trimmed resistor network, and timeout circuit are fully integrated. Only decoupling capacitance (e.g., 0.1µF ceramic) near VCC/GND is recommended for noise immunity-no resistors, capacitors, or diodes are needed to set threshold or timeout.
What is the reset timeout behavior of MAX6464UR46+T during power-up?
On initial power-up, the MAX6464UR46+T asserts reset (OUT low) until VCC rises above VTH+ = 4.830V and then holds reset for ≥150ms. This ensures the microcontroller receives a clean, extended reset pulse regardless of ramp rate-critical for reliable initialization of flash memory, PLLs, and peripherals in the MAX6464UR46+T's target applications.
Can MAX6464UR46+T be used with a 3.3V microcontroller reset input?
Yes, the MAX6464UR46+T's push-pull active-low output is compatible with 3.3V µP reset inputs. When asserted, OUT sinks up to 4.0mA at VCC ≥ 2.5V with VOL ≤ 0.3V-well within 3.3V logic low specifications. When deasserted, VOH ≥ 0.8 × VCC ensures valid high level even at 3.3V supply, eliminating level-shifting requirements.
How does MAX6464UR46+T handle short voltage transients on the VCC line?
The MAX6464UR46+T is immune to VCC transients ≤20µs in duration when the overdrive (VTH− − VCC) is 100mV, as shown in Figure 4 of the datasheet. This transient rejection capability prevents false resets during switching noise, ESD events, or load-dump spikes-making the MAX6464UR46+T suitable for electrically harsh environments like automotive and industrial settings.
MAX6464UR46+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:
- 4.6V
- 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
MAX6464UR46+T FAQ
1.How can I place an order for MAX6464UR46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6464UR46+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 MAX6464UR46+T reliable?
The price and inventory of MAX6464UR46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6464UR46+T is usually 5 days.
3.What payment methods are accepted for MAX6464UR46+T?
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MAX6464UR46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6464UR46+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 MAX6464UR46+T?
For technical support, including MAX6464UR46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6464UR46+T requirements.
6.How does Aetrix verify that MAX6464UR46+T is sourced from the original manufacturer or authorized distributors?
All MAX6464UR46+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 MAX6464UR46+T meets industry standards.
7.What is the process for return or replacement of MAX6464UR46+T?
All MAX6464UR46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6464UR46+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 MAX6464UR46+T part is unused and in its original packaging.
Return procedure for MAX6464UR46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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