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Analog Devices Inc./Maxim Integrated MAX6334UR24D1-T
- Part No.:
- MAX6334UR24D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6334UR24D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,470
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Product details
Overview
MAX6334UR24D1-T from Maxim Integrated is an ultra-low-voltage, open-drain microprocessor supervisory circuit in a 3-pin SOT23 package. It monitors 1.8V–3.3V power supplies, asserts an active-low RESET signal when VCC falls below 2.40V (±1.8% at +25°C), and holds reset for ≥1ms after VCC recovers-designed for brownout protection in portable battery-powered systems.
For engineers reviewing the MAX6334UR24D1-T datasheet, MAX6334UR24D1-T pinout, MAX6334UR24D1-T application, or MAX6334UR24D1-T equivalent, key selection criteria include its 1.0V minimum operating voltage, 3.3μA supply current, open-drain output for bidirectional μP reset interfaces, and factory-trimmed 2.4V threshold with ±3% tolerance over –40°C to +125°C.
Technical Context
The MAX6334UR24D1-T implements a precision bandgap-based reset comparator with transient immunity, ignoring fast VCC glitches up to 24µs (at 10V/ms slew). Its open-drain RESET output requires an external pull-up and supports interfacing with bidirectional microcontroller reset pins such as those on Motorola 68HC11 derivatives.
Reset timeout is factory-set to ≥1ms (min), guaranteed over full temperature range. The device remains functional down to VCC = 1.0V (not 0.7V like push/pull variants), and RESET leakage is ≤0.5µA when deasserted-critical for low-power retention modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.40V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures reliable brownout detection for 2.5V systems |
| Reset Timeout Period | ≥1ms (min) - provides sufficient hold time for μP initialization after power recovery |
| Supply Voltage Range | 1.0V to 5.5V - enables operation during deep brownout while maintaining valid reset state |
| Supply Current | 3.3µA (typ) at VCC = 2.5V - minimizes quiescent drain in battery-critical applications |
| RESET Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and compatibility with bidirectional μP reset pins |
| RESET Leakage | ≤0.5µA when deasserted - preserves pull-up network integrity and avoids false resets in high-impedance nodes |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
Supplied in a RoHS-compliant 3-pin SOT23 package (U3+1 outline, land pattern 90-0179), footprint-compatible with industry-standard supervisory ICs including MAX809/MAX810 and MAX6326–MAX6328.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected directly to system ground plane |
| 2 (RESET) | Open-drain active-low reset output | Drives low during reset assertion; requires external pull-up resistor to VCC or another logic rail for proper level translation |
| 3 (VCC) | Power supply input | Monitored supply rail; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.4V threshold | ±1.8% accuracy at +25°C enables precise power-rail monitoring without external resistors or calibration |
| 1.0V minimum operating voltage | Guarantees correct reset state down to VCC = 1.0V - critical for graceful shutdown in Li-ion battery discharge scenarios |
| Transient-immune comparator | Rejects VCC glitches ≤24µs (at 10V/ms), preventing spurious resets during switching noise or ESD events |
| Ultra-low 3.3µA supply current | Extends battery life in always-on monitoring circuits; negligible impact on system standby power budget |
| SOT23-3 footprint | 0.95mm × 1.45mm body size saves PCB area in space-constrained portable and wearable designs |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless sensor node powered by a single 3.0V Li-ion cell experiences gradual voltage sag during discharge and transient dips during RF transmission. IC Role / Device Role / Timing Role: Supervisory circuit monitoring VCC and asserting RESET before the microcontroller enters undefined state due to undervoltage. Use Value: Prevents firmware corruption and data loss by guaranteeing clean reset initiation at 2.40V, with <1ms latency and no external components required. |
Use Scenario: An industrial digital I/O module operates in harsh environments with noisy 24V DC-DC derived 3.3V rails subject to load-switching transients. IC Role / Device Role / Timing Role: Brownout detector providing fail-safe reset signaling to ARM Cortex-M4 controller during rail collapse or EFT bursts. Use Value: Immunity to sub-25µs transients eliminates nuisance resets; 125°C rating ensures reliability in uncooled control cabinets. |
| Medical Wearable Monitor | Automotive Body Control Module (BCM) |
Use Scenario: A wrist-worn ECG monitor uses a rechargeable coin cell and must retain memory state during brief power interruptions caused by charging circuit switching. IC Role / Device Role / Timing Role: Low-current supervisor enabling controlled shutdown and wake-up sequencing via open-drain RESET tied to MCU's bidirectional reset pin. Use Value: 0.5µA RESET leakage preserves backup SRAM contents; 3.3µA ICC extends usable runtime between charges. |
Use Scenario: A BCM subsystem powered from vehicle battery (9V–16V) via LDO must survive cold-crank events where 3.3V rail drops to ~1.8V for ~100ms. IC Role / Device Role / Timing Role: Reset generator ensuring microcontroller remains held in reset until stable 3.3V is restored post-crank. Use Value: Valid operation down to VCC = 1.0V guarantees reset assertion integrity even during severe brownout; AEC-Q200 qualification supported via automotive-grade ordering options. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR24D1-T | Push/pull active-low RESET output; same 2.4V threshold and 1ms timeout; operates down to 0.7V | Requires no pull-up resistor; unsuitable for wired-OR or bidirectional reset buses | Select when board layout lacks space for pull-up or when driving CMOS inputs directly without level translation |
| TLV803EB24DBZR | Open-drain active-low RESET; 2.43V threshold (±2%); 1.4ms min timeout; 0.9V min VCC; 0.5µA ICC | Lower supply current and deeper brownout support; different SOT23 pinout (GND/RESET/VCC vs. GND/RESET/VCC - same order) | Prefer for ultra-low-power designs needing <1µA ICC or operation below 1.0V; verify pin compatibility before drop-in replacement |
Compared with MAX6334UR24D1-T, MAX6327UR24D1-T offers simpler drive but loses bus-sharing capability, while TLV803EB24DBZR delivers lower ICC and extended VCC range at the cost of tighter threshold tolerance and non-identical thermal drift behavior.
Availability
MAX6334UR24D1-T is available at Aetrix Electronics and suitable for battery-powered IoT sensor nodes, industrial PLC I/O modules, medical wearable monitors, and automotive body control modules requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MAX6334UR24D1-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 MAX633x family delivers ultra-low-voltage, low-quiescent-current supervisory circuits optimized for brownout protection in space- and power-constrained embedded systems using 1.8V–3.3V rails.
FAQ
What is the exact reset threshold voltage for MAX6334UR24D1-T?
The MAX6334UR24D1-T features a factory-trimmed reset threshold of 2.40V 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 "UR24" suffix variant of the MAX6334UR24D1-T.
Does MAX6334UR24D1-T support operation below 1.0V?
No. The MAX6334UR24D1-T is guaranteed functional only down to VCC = 1.0V, unlike the MAX6332/MAX6333 variants which operate down to 0.7V. Below 1.0V, the internal comparator and output stage of the MAX6334UR24D1-T may not maintain valid reset assertion, making it unsuitable for sub-1V brownout detection.
What pull-up resistor value is recommended for the open-drain RESET output of MAX6334UR24D1-T?
A 10kΩ to 100kΩ pull-up resistor to VCC or logic rail is typical for the MAX6334UR24D1-T. At ISINK = 500µA and VCC ≥ 1.8V, VOL ≤ 0.3V ensures solid logic-low assertion; higher values reduce current draw but increase rise time-10kΩ balances speed and power for most 3.3V systems using the MAX6334UR24D1-T.
Is MAX6334UR24D1-T pin-compatible with MAX809 or MAX6328?
Yes. The MAX6334UR24D1-T uses the same 3-pin SOT23 package (U3+1) and identical pinout (Pin 1 = GND, Pin 2 = RESET, Pin 3 = VCC) as MAX809, MAX810, MAX6326, MAX6327, and MAX6328. Mechanical and electrical pin compatibility is explicitly stated in the datasheet's "Pin-Compatible with…" feature bullet.
What is the maximum transient duration the MAX6334UR24D1-T can ignore without asserting reset?
The MAX6334UR24D1-T ignores negative-going VCC transients up to 24µs when the slew rate is 10V/ms, as specified in the Electrical Characteristics table under "VCC Falling Reset Delay." This immunity is achieved via internal filtering and comparator hysteresis, preventing false resets during switching noise or EFT events.
MAX6334UR24D1-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:
- 2.4V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6334UR24D1-T FAQ
1.How can I place an order for MAX6334UR24D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6334UR24D1-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 MAX6334UR24D1-T reliable?
The price and inventory of MAX6334UR24D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6334UR24D1-T is usually 5 days.
3.What payment methods are accepted for MAX6334UR24D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6334UR24D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6334UR24D1-T?
MAX6334UR24D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6334UR24D1-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 MAX6334UR24D1-T?
For technical support, including MAX6334UR24D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6334UR24D1-T requirements.
6.How does Aetrix verify that MAX6334UR24D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6334UR24D1-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 MAX6334UR24D1-T meets industry standards.
7.What is the process for return or replacement of MAX6334UR24D1-T?
All MAX6334UR24D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6334UR24D1-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 MAX6334UR24D1-T part is unused and in its original packaging.
Return procedure for MAX6334UR24D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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