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Analog Devices Inc./Maxim Integrated MAX6334UR16D2-T
- Part No.:
- MAX6334UR16D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR16D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,585
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Product details
Overview
The MAX6334UR16D2-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit in a 3-pin SOT23 package, designed for reliable power-on reset generation in 1.8V–3.3V digital systems. It monitors VCC with a factory-trimmed 1.60V reset threshold (±1.8% at +25°C, ±3% over –40°C to +125°C), asserts reset during brownout, and maintains it for ≥20ms after VCC recovers-enabling stable boot in battery-powered controllers and intelligent instruments.
For engineers reviewing the MAX6334UR16D2-T datasheet, MAX6334UR16D2-T pinout, MAX6334UR16D2-T application, or MAX6334UR16D2-T equivalent, key selection criteria include its 1.0V minimum operating voltage, 3.3µA supply current, open-drain output compatibility with bidirectional µP reset pins, and guaranteed reset validity down to VCC = 1.0V-not 0.7V like push/pull variants.
Technical Context
This device implements a precision bandgap-based reset comparator with transient immunity, rejecting fast VCC glitches via internal filtering. Its open-drain RESET output requires an external pull-up resistor and supports wired-OR configurations with other reset sources-critical for systems using Motorola 68HC11-style bidirectional reset pins.
The reset timeout period is factory-programmed to 20ms (min), with propagation delay under 24µs during VCC fall at 10V/ms. The comparator's overdrive response ensures no false resets for transients ≤100µs at 20mV overdrive, validated across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.60V ±1.8% at +25°C; ±3% over –40°C to +125°C-ensures accurate brownout detection for 1.8V logic rails |
| Min Operating Voltage | 1.0V-guarantees correct reset state assertion down to this level, unlike 0.7V variants |
| Supply Current | 3.3µA typical at 1.8V-enables multi-year operation in coin-cell–powered portable equipment |
| Reset Timeout Period | 20ms minimum-meets boot timing requirements of ARM Cortex-M0/M3 and 8-bit microcontrollers |
| RESET Output Type | Open-drain, active-low-supports shared reset bus and bidirectional µP interfaces without contention |
| VOL (ISINK = 500µA) | ≤0.3V at VCC ≥ 1.8V-ensures solid logic-low drive into standard CMOS inputs |
| Operating Temp Range | –40°C to +125°C-qualified for automotive under-hood and industrial control environments |
Pinout & Package
Package: 3-pin SOT23 (U3+1 outline, land pattern 90-0179), tape-and-reel only, RoHS-compliant (–T suffix denotes leaded; +T = lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low output; requires external pull-up resistor (typically 10kΩ–100kΩ) to VCC or another rail |
| 3 | VCC | Power supply input (1.0V to 5.5V); powers internal comparator and output transistor; decoupling capacitor (0.1µF) required |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 1.60V with ±1.8% tolerance at +25°C-eliminates external resistor networks and calibration effort |
| Transient-immune reset comparator | Rejects VCC glitches ≤100µs wide at 20mV overdrive-prevents spurious resets in noisy power environments |
| Ultra-low quiescent current | 3.3µA at 1.8V-extends battery life in always-on IoT sensors and handheld medical devices |
| Guaranteed operation down to 1.0V | Valid RESET assertion maintained as VCC falls to 1.0V-supports graceful shutdown in deep-brownout conditions |
| Open-drain output architecture | Enables wired-OR reset busing and safe interfacing with µPs having bidirectional reset pins (e.g., 68HC11) |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers operating in harsh factory environments with fluctuating 24V DC supplies stepped down to 3.3V logic rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM-based controller during input rail brownout or cold start. Use Value: 20ms minimum reset pulse ensures full initialization of firmware and peripheral registers before execution begins. |
Use Scenario: Environmental monitoring nodes powered by CR2032 coin cells, sampling temperature/humidity every 5 minutes. IC Role / Device Role / Timing Role: Power-on reset generator that remains functional down to 1.0V VCC, enabling reliable wake-up from ultra-low-power sleep states. Use Value: 3.3µA supply current extends operational lifetime beyond 5 years on a single battery cell. |
| Automotive Body Control Modules | Portable Medical Diagnostic Devices |
Use Scenario: Under-dash modules managing lighting and door locks, exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Reset supervisor immune to negative-going VCC spikes up to 100µs-prevents unintended MCU resets during alternator switching. Use Value: Factory-trimmed 1.60V threshold matches 1.8V I/O rail requirements while tolerating ±3% drift over –40°C to +125°C. |
Use Scenario: Handheld ECG analyzers requiring FDA-grade reliability and zero-reset-failure operation during patient acquisition. IC Role / Device Role / Timing Role: Fail-safe reset source that asserts before MCU core voltage drops below functional level, ensuring deterministic boot sequence. Use Value: Open-drain output allows integration with existing reset arbitration logic in legacy analog-front-end designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6333UR16D2-T | Push/pull active-low RESET output; operates down to 0.7V VCC | Requires no pull-up resistor; suitable where shared reset bus is not needed | Select when board layout prohibits external pull-up or when lower VCC operation (<1.0V) is required |
| TLV803EC16DBVR | Open-drain, 1.6V threshold, 2.7V–6V VCC range; 1.8µA ICC; 200ms timeout | Higher VCC min (2.7V); longer timeout; TI-qualified for extended temp | Select when system uses >2.7V rails and requires longer reset hold time for FPGA configuration |
Compared with MAX6334UR16D2-T, the MAX6333UR16D2-T offers simpler interface but lacks wired-OR capability, while TLV803EC16DBVR trades lower supply current for higher minimum VCC and fixed 200ms timeout-making MAX6334UR16D2-T optimal for 1.8V/3.3V battery systems needing flexible reset arbitration.
Availability
MAX6334UR16D2-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6334UR16D2-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, automotive, and computing applications.
The MAX6332/MAX6333/MAX6334 family delivers ultra-low-voltage, low-power supervisory circuits optimized for reliable reset generation in space-constrained 1.8V–3.3V embedded systems-replacing discrete RC networks with high-accuracy, temperature-stable alternatives.
FAQ
What is the exact reset threshold voltage of the MAX6334UR16D2-T?
The MAX6334UR16D2-T features a factory-trimmed reset threshold of 1.60V, with a tolerance of ±1.8% at +25°C and ±3% over the full operating temperature range of –40°C to +125°C. This precise threshold ensures consistent brownout detection for 1.8V logic systems without external calibration components.
Does the MAX6334UR16D2-T support operation below 1.8V supply voltage?
Yes, the MAX6334UR16D2-T operates down to 1.0V VCC and guarantees correct reset assertion and deassertion behavior at that level. Its minimum operating voltage is 1.0V-higher than the 0.7V spec of MAX6332/MAX6333 variants-but sufficient for most 1.8V rail monitoring where full functionality below 1.0V is unnecessary.
Why does the MAX6334UR16D2-T use an open-drain output instead of push/pull?
The MAX6334UR16D2-T uses an open-drain output to enable wired-OR reset bus configurations and safe interfacing with microprocessors that have bidirectional reset pins, such as the Motorola 68HC11. This architecture prevents output contention and allows multiple reset sources-including watchdog timers or manual reset buttons-to share the same reset line without additional logic.
What is the guaranteed reset timeout period for the MAX6334UR16D2-T?
The MAX6334UR16D2-T has a factory-programmed nominal reset timeout period of 20ms, with a guaranteed minimum of 20ms and maximum of 40ms over temperature and voltage. This duration satisfies boot timing requirements for most 8-bit, 16-bit, and entry-level 32-bit microcontrollers, ensuring peripherals and memory are fully initialized before code execution begins.
Can the MAX6334UR16D2-T be used in automotive applications?
Yes, the MAX6334UR16D2-T is rated for operation from –40°C to +125°C and exhibits robust immunity to fast VCC transients-key requirements for automotive body control modules and infotainment subsystems. Its 1.60V reset threshold aligns with 1.8V I/O rails commonly used in modern automotive MCUs, and its SOT23 package supports automated assembly in high-reliability production lines.
MAX6334UR16D2-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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6334UR16D2-T FAQ
1.How can I place an order for MAX6334UR16D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR16D2-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 MAX6334UR16D2-T reliable?
The price and inventory of MAX6334UR16D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR16D2-T is usually 5 days.
3.What payment methods are accepted for MAX6334UR16D2-T?
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4.How is shipping managed for MAX6334UR16D2-T?
MAX6334UR16D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR16D2-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 MAX6334UR16D2-T?
For technical support, including MAX6334UR16D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR16D2-T requirements.
6.How does Aetrix verify that MAX6334UR16D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6334UR16D2-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 MAX6334UR16D2-T meets industry standards.
7.What is the process for return or replacement of MAX6334UR16D2-T?
All MAX6334UR16D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR16D2-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 MAX6334UR16D2-T part is unused and in its original packaging.
Return procedure for MAX6334UR16D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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