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Analog Devices Inc./Maxim Integrated MAX6334UR17D3-T
- Part No.:
- MAX6334UR17D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR17D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,849
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Product details
Overview
MAX6334UR17D3-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed for 1.8V–3.3V digital systems. It monitors VCC and asserts RESET when supply voltage falls below 1.70V (±1.8% at +25°C), maintains reset for ≥100ms after VCC recovers, draws only 3.3µA at 2.5V, and operates down to VCC = 1.0V over –40°C to +125°C - used in portable battery-powered equipment requiring reliable brownout detection.
For engineers reviewing the MAX6334UR17D3-T datasheet, MAX6334UR17D3-T pinout, MAX6334UR17D3-T application, or MAX6334UR17D3-T equivalent, key selection criteria include its 1.70V factory-trimmed reset threshold, 100ms minimum timeout, open-drain output compatibility with bidirectional μP reset pins, and guaranteed operation at VCC ≥ 1.0V across industrial temperature range.
Technical Context
The MAX6334UR17D3-T implements a precision bandgap-based reset comparator with factory-trimmed 1.70V threshold (±1.8% at +25°C, ±3% over –40°C to +125°C) and internal timing circuitry generating a fixed ≥100ms reset pulse width after VCC recovery. Its open-drain RESET output requires an external pull-up and supports wired-OR configurations.
It features immunity to fast VCC transients (e.g., ≤24µs glitches at 10V/ms slew rate), operates without external components, and guarantees valid RESET state down to VCC = 1.0V - unlike push/pull variants which guarantee to 0.7V. The device is fully specified across –40°C to +125°C with no derating required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.70V ±1.8% at +25°C; ensures reliable brownout detection for 1.8V systems before functional failure |
| Reset Timeout Period | ≥100ms minimum; provides sufficient hold time for μP initialization and peripheral stabilization |
| Supply Current | 3.3µA typical at VCC = 2.5V; enables multi-year battery life in always-on monitoring applications |
| Operating Voltage Range | VCC = 1.0V to 5.5V; supports operation during deep brownout while maintaining reset assertion integrity |
| Temperature Range | –40°C to +125°C; qualified for under-hood automotive and industrial embedded environments |
| Output Type | Open-drain active-low RESET; allows direct interface with bidirectional μP reset pins and wired-OR reset buses |
| Reset Propagation Delay | 24µs max at 10V/ms VCC fall rate; rejects short power glitches without false triggering |
Pinout & Package
MAX6334UR17D3-T is housed in a 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - compatible with high-density PCB layouts and reflow soldering (lead-free: +260°C).
| 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 logic rail |
| 3 | VCC | Power supply input (1.0V–5.5V); powers internal comparator and timing circuit; decoupling capacitor (0.1µF) recommended |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.70V reset threshold | Eliminates external resistor divider; achieves ±1.8% accuracy at +25°C for precise 1.8V supply monitoring |
| 100ms minimum reset timeout | Ensures full μP and peripheral reset sequencing without additional timing components or firmware delays |
| Open-drain RESET output | Enables shared reset bus with multiple supervisors or μPs; supports bidirectional reset interfaces (e.g., Motorola 68HC11) |
| 1.0V minimum operating VCC | Maintains valid reset assertion during severe brownout conditions where push/pull variants fail below 0.7V |
| 24µs glitch immunity | Rejects fast negative-going VCC transients up to 24µs duration at 10V/ms, preventing spurious resets |
Applications
| Pentium® II Computers | Portable/Battery-Powered Equipment |
|---|---|
Use Scenario: Power sequencing and brownout protection in legacy x86 desktop motherboards with 1.8V/2.5V core rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to CPU and chipset during VCC undervoltage events. Use Value: Guarantees clean reset initiation at precisely 1.70V threshold, eliminating need for discrete comparator and RC network. |
Use Scenario: Long-life battery monitoring in handheld medical devices and IoT sensors operating on single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Low-power reset generator that remains functional down to VCC = 1.0V, extending usable battery range. Use Value: 3.3µA supply current and 100ms timeout enable deterministic wake-up and safe boot before battery depletion. |
| Intelligent Instruments | Critical μP/μC Power Monitoring |
Use Scenario: Precision data loggers and field instruments exposed to wide ambient temperatures (–40°C to +125°C). IC Role / Device Role / Timing Role: Temperature-stable reset supervisor with ±3% threshold variation over full range. Use Value: Prevents erratic μC behavior during thermal cycling by maintaining accurate reset assertion across extreme conditions. |
Use Scenario: Industrial PLC modules requiring fail-safe restart after power interruption or voltage sag. IC Role / Device Role / Timing Role: Open-drain RESET output enabling integration into existing reset bus architecture with multiple controllers. Use Value: Wired-OR capability allows centralized reset management without redesigning board-level reset distribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6334UR17D2-T | Same 1.70V threshold and open-drain output, but 20ms min reset timeout instead of 100ms | Suitable for faster-boot systems where shorter reset hold time is acceptable | Select when μP initialization completes in <25ms and board space constraints favor identical footprint |
| MAX6327UT17D3-T | Pin-compatible 3-pin SOT23, same 1.7V threshold and 100ms timeout, but push/pull (not open-drain) output | Requires redesign of reset net if wired-OR or bidirectional μP interface is needed | Choose only if system uses dedicated reset line and no shared-bus requirements exist |
Compared with MAX6334UR17D3-T, the MAX6334UR17D2-T reduces reset hold time for speed-critical designs, while the MAX6327UT17D3-T trades open-drain flexibility for simpler pull-up-free operation - both retain identical threshold accuracy and temperature performance.
Availability
MAX6334UR17D3-T is available at Aetrix Electronics and suitable for Pentium® II computers, portable/battery-powered equipment, intelligent instruments, and critical μP/μC power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6334UR17D3-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 industrial, automotive, communications, and computing applications.
The MAX6332/MAX6333/MAX6334 family delivers ultra-low-voltage, low-power μP supervisory circuits optimized for space-constrained, battery-sensitive systems requiring accurate reset thresholds and guaranteed operation down to 1.0V.
FAQ
What is the exact reset threshold voltage of MAX6334UR17D3-T?
The MAX6334UR17D3-T has a factory-trimmed nominal reset threshold of 1.70V, with tolerance of ±1.8% at +25°C and ±3% over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the datasheet and applies specifically to the "UR17" suffix variant of the MAX6334 family.
Does MAX6334UR17D3-T support operation below 1.8V supply voltage?
Yes, MAX6334UR17D3-T is guaranteed to operate and assert valid RESET down to VCC = 1.0V over –40°C to +125°C, making it suitable for deep brownout scenarios where 1.8V systems dip below nominal. Its 3.3µA supply current at 2.5V further supports ultra-low-power use cases.
What is the function of the open-drain RESET output on MAX6334UR17D3-T?
The open-drain RESET output on MAX6334UR17D3-T requires an external pull-up resistor and enables wired-OR connections with other reset sources. This allows bidirectional reset control - for example, permitting either the MAX6334UR17D3-T or a microcontroller to assert system reset on a shared line, as used in Motorola 68HC11 designs.
How does the 100ms reset timeout of MAX6334UR17D3-T compare to other variants in the family?
The "D3" suffix in MAX6334UR17D3-T specifies a minimum 100ms reset timeout period, distinct from "D1" (1ms min) and "D2" (20ms min) variants. This longer timeout ensures robust initialization of complex peripherals and memory subsystems before μP release, especially in industrial and instrumentation applications.
Is MAX6334UR17D3-T pin-compatible with older Maxim reset ICs like MAX809?
Yes, MAX6334UR17D3-T is explicitly stated as pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the datasheet's Benefits and Features section. All share the same 3-pin SOT23 package and pinout (GND, RESET, VCC), enabling drop-in replacement where open-drain output and 1.70V threshold meet design requirements.
MAX6334UR17D3-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:
- 1.7V
- 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
MAX6334UR17D3-T FAQ
1.How can I place an order for MAX6334UR17D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR17D3-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 MAX6334UR17D3-T reliable?
The price and inventory of MAX6334UR17D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR17D3-T is usually 5 days.
3.What payment methods are accepted for MAX6334UR17D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6334UR17D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6334UR17D3-T?
MAX6334UR17D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR17D3-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 MAX6334UR17D3-T?
For technical support, including MAX6334UR17D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR17D3-T requirements.
6.How does Aetrix verify that MAX6334UR17D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6334UR17D3-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 MAX6334UR17D3-T meets industry standards.
7.What is the process for return or replacement of MAX6334UR17D3-T?
All MAX6334UR17D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR17D3-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 MAX6334UR17D3-T part is unused and in its original packaging.
Return procedure for MAX6334UR17D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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