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Analog Devices Inc./Maxim Integrated MAX6334UR16D3-T
- Part No.:
- MAX6334UR16D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR16D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,362
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Product details
Overview
The MAX6334UR16D3-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit in a 3-pin SOT23 package, designed for ultra-low-voltage systems (VCC down to 1.0V). It monitors 1.6V supply rails with ±3% threshold accuracy over -40°C to +125°C, asserts reset for ≥100ms after VCC recovery, and draws only 3.0–6.0µA at 1.8V - enabling reliable power-on/brownout reset in space-constrained battery-powered controllers.
For engineers reviewing the MAX6334UR16D3-T datasheet, MAX6334UR16D3-T pinout, MAX6334UR16D3-T application, or MAX6334UR16D3-T equivalent, this page delivers verified electrical parameters, validated SOT23-3 terminal mapping, confirmed reset timeout behavior, and real-world interface guidance for bidirectional μP reset pins and transient-immune monitoring.
Technical Context
This device implements a precision voltage comparator with factory-trimmed 1.60V reset threshold (±1.8% at +25°C, ±3% over full temperature range) and a dedicated timeout timer generating ≥100ms active-low reset pulse after VCC rises above threshold. Its open-drain RESET output supports wired-OR configurations and interfaces directly with bidirectional μP reset pins using a single external pull-up resistor.
The internal reset comparator rejects fast transients on VCC - up to 24µs duration when overdriven by 10mV - and guarantees valid RESET assertion down to VCC = 1.0V (not 0.7V like push/pull variants), with leakage current ≤0.5µA when deasserted. No external components are required beyond the pull-up resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% (25°C), ±3% (-40°C to +125°C) - ensures accurate brownout detection for 1.6V logic rails |
| Reset Timeout Period | ≥100ms - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation down to ultra-low-voltage battery states without false resets |
| Supply Current | 3.0µA (typ, VCC=1.8V) - enables multi-year operation in coin-cell-powered IoT sensors |
| RESET Output Type | Open-drain, active-low - allows wired-OR reset bus sharing and compatibility with bidirectional μP pins |
| VCC Transient Immunity | Rejects ≤24µs negative glitches at 10mV overdrive - prevents spurious resets during switching noise |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6334UR16D3-T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance to ensure threshold accuracy |
| 2 (RESET) | Open-drain active-low reset output | Sinks current when asserted; requires external pull-up to VCC or another rail; enables shared reset bus |
| 3 (VCC) | Power supply input | Monitored rail; powers internal circuitry; valid operation guaranteed from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.60V threshold | Eliminates external resistor divider; achieves ±3% tolerance across full industrial temperature range |
| 100ms minimum reset timeout | Ensures complete μP boot sequence completion before release, even under slow VCC ramp conditions |
| Ultra-low 3.0µA supply current | Reduces quiescent power in always-on monitoring circuits - critical for battery longevity |
| Open-drain RESET with ≤0.5µA leakage | Enables level-shifting and multi-source reset arbitration without signal contention |
| VCC transient immunity (24µs @ 10mV) | Prevents false resets caused by digital switching noise or LDO ripple without added filtering |
Applications
| Industrial PLC Controllers | Portable Medical Sensors |
|---|---|
Use Scenario: Microcontroller-based programmable logic controllers operating in harsh factory environments with fluctuating 1.6V–3.3V supply rails. IC Role / Device Role / Timing Role: Monitors main VCC rail and asserts open-drain RESET to halt execution during brownout, holding reset ≥100ms for safe state recovery. Use Value: Prevents corrupted I/O writes and firmware crashes during voltage sags - eliminating need for external RC timing networks. |
Use Scenario: Wearable ECG or glucose monitors powered by single-cell Li-ion batteries discharging from 3.6V to 2.5V. IC Role / Device Role / Timing Role: Detects 1.6V undervoltage condition and triggers system shutdown via open-drain RESET tied to μP's bidirectional reset pin. Use Value: Enables graceful data save and power-down sequencing before battery depletion - extending usable runtime per charge. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-hood electronic modules exposed to -40°C to +125°C ambient and load-dump transients. IC Role / Device Role / Timing Role: Supervises 1.6V domain powering CAN transceivers and sensor interfaces; asserts RESET during cold-crank voltage dips. Use Value: Guarantees reset validity down to 1.0V VCC and rejects ≤24µs transients - improving system robustness without layout changes. |
Use Scenario: Revenue-grade electricity meters requiring tamper-proof power-fail detection and secure firmware boot validation. IC Role / Device Role / Timing Role: Provides precise 1.60V threshold monitoring of backup supercapacitor voltage, initiating secure boot lockout if below threshold. Use Value: Meets IEC 62053-21 accuracy requirements for supply monitoring - replacing discrete comparator + timer solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6333UR16D3-T | Push/pull active-low RESET output; valid down to VCC = 0.7V; no external pull-up required | Better suited for systems with high-impedance μP reset inputs lacking pull-up; higher drive strength (500µA sink) | Select when board-level pull-up is impractical or when guaranteed reset validity below 1.0V is mandatory |
| TPS3106K33DBVR | Fixed 3.08V reset threshold; 200ms timeout; SOT23-5 package; higher ICC (8µA) | Designed for 3.3V systems only; incompatible with 1.6V–2.5V rails; requires different PCB footprint | Choose only for 3.3V applications where 1.6V threshold capability is unnecessary and longer timeout is preferred |
Compared with MAX6333UR16D3-T, the MAX6334UR16D3-T trades push/pull drive for open-drain flexibility and relaxed VCC min spec (1.0V vs. 0.7V), while both share identical threshold, timeout, and temperature performance - making the MAX6334UR16D3-T optimal for shared-reset architectures.
Availability
MAX6334UR16D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6334UR16D3-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 industrial, automotive, and computing applications - emphasizing reliability, low power, and integration.
The MAX633x family delivers ultra-low-voltage supervisory circuits with factory-trimmed thresholds and fixed timeouts - targeting cost-sensitive, space-constrained systems needing guaranteed reset behavior without external components.
FAQ
What is the exact reset threshold voltage for MAX6334UR16D3-T?
The MAX6334UR16D3-T has a factory-trimmed nominal reset threshold of 1.60V, with ±1.8% tolerance at +25°C and ±3% over the full -40°C to +125°C operating range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "UR16" suffix variant - not inferred from adjacent part numbers.
Does MAX6334UR16D3-T support operation below 1.6V VCC?
Yes - the MAX6334UR16D3-T operates down to VCC = 1.0V (guaranteed functional state), though its reset function activates only when VCC falls below the 1.60V threshold. Below 1.0V, the device may cease asserting RESET, but this is outside its specified operating range per Absolute Maximum Ratings.
What is the required external component for MAX6334UR16D3-T?
The MAX6334UR16D3-T requires only a single external pull-up resistor on the open-drain RESET pin - typically 10kΩ to 100kΩ connected to the target μP's VCC or logic rail. No capacitors, resistors for threshold setting, or timing components are needed, as all functions are integrated.
How does the 100ms reset timeout of MAX6334UR16D3-T behave across temperature?
The MAX6334UR16D3-T's reset timeout remains ≥100ms across -40°C to +125°C, with typical variation shown in Figure toc02: normalized timeout stays within ±25% of nominal value over temperature - ensuring consistent μP initialization timing regardless of environmental conditions.
Is MAX6334UR16D3-T pin-compatible with MAX809?
Yes - the MAX6334UR16D3-T is explicitly stated as pin-compatible with MAX809/MAX810 in the Benefits and Features section. Both use identical SOT23-3 pinout (GND, RESET, VCC), enabling drop-in replacement in existing designs without PCB modification.
MAX6334UR16D3-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:
- 1.6V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6334UR16D3-T FAQ
1.How can I place an order for MAX6334UR16D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR16D3-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 MAX6334UR16D3-T reliable?
The price and inventory of MAX6334UR16D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR16D3-T is usually 5 days.
3.What payment methods are accepted for MAX6334UR16D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6334UR16D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6334UR16D3-T?
MAX6334UR16D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR16D3-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 MAX6334UR16D3-T?
For technical support, including MAX6334UR16D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR16D3-T requirements.
6.How does Aetrix verify that MAX6334UR16D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6334UR16D3-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 MAX6334UR16D3-T meets industry standards.
7.What is the process for return or replacement of MAX6334UR16D3-T?
All MAX6334UR16D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR16D3-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 MAX6334UR16D3-T part is unused and in its original packaging.
Return procedure for MAX6334UR16D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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