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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 MPU/RESET CIRC 1.60V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,673
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Product details
Overview
MAX6334UR16D3+T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit in SOT23-3 package, designed for 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 ≥100ms after VCC recovers. Used in portable equipment and critical μP power monitoring where low supply current and transient immunity are essential.
For engineers reviewing the MAX6334UR16D3+T datasheet, MAX6334UR16D3+T pinout, MAX6334UR16D3+T application, or MAX6334UR16D3+T equivalent, key selection criteria include open-drain output compatibility with bidirectional μP reset pins, guaranteed reset validity down to VCC = 1.0V, 100ms minimum timeout, 1.6V threshold tolerance, and SOT23-3 footprint constraints.
Technical Context
The MAX6334UR16D3+T implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 1.60V, coupled with a temperature-stable RC-based timeout generator delivering ≥100ms reset pulse width. Its open-drain RESET output requires an external pull-up resistor and supports wired-OR configurations with microcontrollers like the Motorola 68HC11.
Reset assertion is immune to fast transients-e.g., a 20mV overdrive allows ≤10µs negative-going glitches without false triggering. The device operates from VCC = 1.0V to 5.5V and guarantees correct reset state down to VCC = 1.0V, unlike push/pull variants which extend to 0.7V.
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 reliable brownout detection across industrial temperature range |
| Reset Timeout Period | ≥100ms - holds μP in reset long enough for full power stabilization after recovery |
| Supply Voltage Range | 1.0V to 5.5V - supports operation down to ultra-low-voltage battery-powered states |
| Supply Current | 3.0µA (typ) at VCC = 1.8V - enables multi-year battery life in portable instrumentation |
| RESET Output Type | Open-drain, active-low - allows shared reset bus and interface with bidirectional μP reset pins |
| Operating Temperature | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VCC Falling Propagation Delay | 24µs - provides rapid response to supply collapse without excessive delay |
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 × 0.8mm footprint and 0.95mm height. Pin 1 = GND, Pin 2 = RESET (open-drain), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance to avoid noise-induced reset errors |
| 2 (RESET) | Active-low open-drain output | Drives low during reset; requires external pull-up to VCC or another logic rail; enables wired-OR reset networks |
| 3 (VCC) | Power supply input | Supplies internal circuitry; monitored for threshold violation; absolute max rating = +6V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 1.60V reset threshold | Eliminates external resistor divider; achieves ±1.8% accuracy at room temperature without calibration |
| 100ms minimum reset timeout | Ensures μP remains held in reset until power rails settle fully post-brownout or power-up |
| 1.0V minimum operating VCC | Guarantees functional reset assertion even as battery voltage depletes to near cutoff |
| 3.0µA typical supply current | Reduces quiescent load on coin-cell or energy-harvesting sources in always-on monitoring |
| Transient-immune reset comparator | Rejects <10µs negative VCC glitches up to 20mV amplitude - prevents spurious resets in noisy environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered wearable ECG sensor continuously monitors supply voltage during intermittent BLE transmission bursts. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt MCU execution during 1.6V brownout, with 100ms hold time ensuring clean restart after voltage recovery. Use Value: Prevents corrupted memory writes and firmware lockup caused by marginal VCC during RF transmit peaks. | Use Scenario: DIN-rail mounted I/O module powered from 24VDC supply with local 3.3V LDO feeding controller and analog front-end. IC Role / Device Role / Timing Role: Open-drain RESET output tied to shared system reset bus with other modules via pull-up; asserts when local 3.3V rail drops below 1.60V. Use Value: Enables synchronized system-level reset across distributed modules without requiring dedicated reset controllers. |
| Automotive Body Control Units | Smart Energy Meters |
Use Scenario: BCM microcontroller powered from vehicle battery via buck converter; subjected to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Monitors 3.3V domain; ignores sub-10µs negative transients but triggers ≥100ms reset on sustained brownout below 1.60V. Use Value: Avoids false resets during cranking while ensuring deterministic recovery after battery sag. | Use Scenario: Revenue-grade meter with real-time clock and tamper detection, operating from supercapacitor backup during AC mains failure. IC Role / Device Role / Timing Role: Resets meter SoC when supercap voltage falls to 1.60V, holding reset for ≥100ms to guarantee RTC register integrity before shutdown. Use Value: Preserves timekeeping accuracy and event logging continuity across power interruptions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UR16D3+T | Same 1.60V threshold, 100ms timeout, SOT23-3, but push/pull active-low output | Requires no pull-up resistor; incompatible with wired-OR or bidirectional μP reset pins | Select when board layout lacks space for pull-up or when driving high-capacitance loads directly |
| TPS3808G16DBVR | 1.6V threshold, 200ms timeout, 1.5µA ICC, but push/pull output and different pinout (VCC/EN/GND/RESET) | Includes enable input; not pin-compatible; higher timeout reduces risk of premature release | Select when system requires programmable enable control or longer reset hold time is preferred |
Compared with MAX6334UR16D3+T, the MAX6326UR16D3+T eliminates external pull-up needs but sacrifices bus-sharing capability, while the TPS3808G16DBVR adds enable functionality and longer timeout at the cost of pin incompatibility and larger footprint.
Availability
MAX6334UR16D3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX633x family delivers ultra-low-voltage, low-power μP supervisory circuits targeting space-constrained, battery-operated, and harsh-environment systems requiring robust brownout protection and minimal quiescent current.
FAQ
What is the guaranteed minimum operating voltage for MAX6334UR16D3+T?
The MAX6334UR16D3+T is guaranteed to operate correctly down to VCC = 1.0V across the full temperature range (-40°C to +125°C). Below this, reset assertion is not assured. This differs from the MAX6332/MAX6333 variants, which guarantee operation to 0.7V. The 1.0V limit reflects the open-drain output stage's minimum valid sink capability.
Does MAX6334UR16D3+T require an external pull-up resistor on the RESET pin?
Yes, MAX6334UR16D3+T requires an external pull-up resistor on the RESET pin because it features an open-drain output. A typical value is 10kΩ to 100kΩ connected to the same VCC rail or another logic supply. Without this resistor, the RESET signal cannot go high (non-asserted state), preventing proper μP initialization.
What is the actual reset timeout duration for MAX6334UR16D3+T?
The MAX6334UR16D3+T provides a minimum reset timeout of 100ms after VCC rises above the 1.60V threshold. Typical duration is 150ms, and maximum is 200ms over temperature. This timing is factory-programmed and does not require external components, ensuring consistent power-up sequencing across production units.
Can MAX6334UR16D3+T be used with microcontrollers that have bidirectional reset pins?
Yes, MAX6334UR16D3+T is specifically suited for μPs with bidirectional reset pins (e.g., Motorola 68HC11) due to its open-drain output. When combined with a single pull-up resistor, both the supervisor and the μP can drive the shared reset line low, enabling coordinated system reset without additional logic or isolation components.
How does the reset threshold tolerance of MAX6334UR16D3+T vary with temperature?
The reset threshold of MAX6334UR16D3+T is specified as ±1.8% at +25°C and widens to ±3% over the full operating range of -40°C to +125°C. This means the actual trip point stays within 1.55V–1.65V at room temperature and 1.52V–1.68V across industrial temperatures, ensuring robust brownout detection despite thermal drift.
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:
- Active
- 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?
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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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