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Analog Devices Inc./Maxim Integrated MAX834EUK-T
- Part No.:
- MAX834EUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX834EUK-T.pdf
- Description:
- LATCHING VOLTAGE MONITORS
- Quantity:
- Payment:
- Shipping:
Inventory:52,548
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Product details
Overview
MAX834EUK-T from Maxim Integrated is a micropower, latching voltage monitor IC with a precision 1.204V bandgap reference, comparator, and open-drain n-channel output in SOT23-5 package. It detects falling supply voltages (e.g., battery VCC), latches low to prevent deep discharge, and requires only two external resistors to set trip thresholds from ~2.4V to 10V. Used in battery-load disconnect circuits for lead-acid and NiCd systems.
For engineers reviewing the MAX834EUK-T datasheet, MAX834EUK-T pinout, MAX834EUK-T application, or MAX834EUK-T equivalent, key selection criteria include its <2µA supply current, ±1.25% threshold accuracy, level-sensitive CLEAR input, latch persistence until reset, and compatibility with high-impedance resistor dividers for ultra-low-power monitoring.
Technical Context
The MAX834EUK-T implements a level-sensitive latch architecture that eliminates external hysteresis requirements in undervoltage detection. Its comparator compares the divided monitored voltage at IN against an internal 1.204V reference, triggering a latched low output when VIN falls below VTH.
Operation relies on a dedicated CLEAR input: a ≥1µs high pulse resets the latch only when VIN > VTH, ensuring reliable recovery after recharge. The open-drain OUT supports pull-up to voltages up to 11V-exceeding VCC-enabling flexible interfacing with higher-voltage logic or discrete load switches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V - powers directly from battery or system rail without regulation |
| Threshold Accuracy | ±1.25% - ensures precise undervoltage trip points across temperature (-40°C to +85°C) |
| Supply Current | <2µA typical - enables multi-year operation on coin cells or small batteries |
| Input Leakage | ±12nA max - permits use of >1MΩ resistor dividers without accuracy degradation |
| Propagation Delay | 80µs typical - fast enough for real-time battery protection before critical collapse |
| Output Type | Open-drain n-channel - allows pull-up to 11V, enabling direct drive of P-MOSFET gates or higher-voltage logic |
| Clear Pulse Width | ≥1µs - minimal timing requirement simplifies reset circuitry (e.g., RC or pushbutton) |
Pinout & Package
SOT23-5 surface-mount package (3.099mm × 1.499mm × 1.397mm), RoHS-compliant, tape-and-reel packaged (74 units per reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLEAR (Pin 1) | Asynchronous reset input | Level-sensitive; ≥1µs high pulse resets latch only when IN > VTH - prevents spurious clearing during brownout |
| GND (Pin 2) | Analog and digital ground reference | Common return for reference, comparator, and output stage - must be low-impedance for stable threshold |
| VCC (Pin 3) | Power supply input | Bias source for internal reference and logic; device remains functional down to 1.2V VCC if VIN ≤ VCC/2 |
| IN (Pin 4) | Noninverting comparator input | High-impedance node for resistor-divider feedback; accepts 0V to (VCC – 1V) - enables wide-range monitoring |
| OUT (Pin 5) | Open-drain output | N-channel MOSFET drain; sinks current when latched low; requires external pull-up - supports voltage translation up to 11V |
Key Features
| Feature | Design Value |
|---|---|
| Latched output behavior | Once triggered low by undervoltage, OUT stays low indefinitely until explicit CLEAR pulse - prevents battery reconnection during voltage rebound |
| Precision internal reference | 1.204V ±1.25% bandgap reference - eliminates need for external precision reference in threshold-setting networks |
| Ultra-low quiescent current | <2µA supply current - extends battery life in always-on monitoring applications such as smoke detectors or remote sensors |
| Programmable trip voltage | VTRIP = 1.204 × (R1 + R2)/R2 - supports custom thresholds from ~2.4V to 10V using standard resistor values |
| High-voltage output capability | Open-drain OUT rated to 11V - enables direct interface with 5V or 3.3V logic, or gate drive of high-side P-MOSFETs without level shifters |
Applications
| Battery Undervoltage Protection | Load-Switch Control |
|---|---|
Use Scenario: Monitoring 3.6V Li-ion or 12V lead-acid battery voltage during discharge to prevent irreversible capacity loss. IC Role / Device Role / Timing Role: Voltage monitor with latched output acting as enable signal for a high-side P-MOSFET load switch. Use Value: Prevents deep discharge by holding load off until battery is recharged and manually reset via CLEAR - avoids cell damage and extends service life. | Use Scenario: Enabling/disabling power to non-critical subsystems (e.g., display backlight, sensor array) based on main rail voltage. IC Role / Device Role / Timing Role: Threshold detector generating a clean, persistent enable/disable signal for discrete power switches. Use Value: Eliminates need for microcontroller polling or software debounce - reduces firmware complexity and ensures deterministic power sequencing. |
| Low-Power Sensor Node Supervision | Industrial Backup Power Monitoring |
Use Scenario: Long-life wireless sensor node powered by CR2032 coin cell, requiring multi-year operation without maintenance. IC Role / Device Role / Timing Role: Micropower supervisor detecting end-of-life battery voltage drop and asserting fault flag. Use Value: <2µA supply current and ±1.25% accuracy allow reliable EOL detection over full temperature range without compromising battery runtime. | Use Scenario: Monitoring backup supercapacitor or secondary battery in industrial PLC I/O modules during AC mains failure. IC Role / Device Role / Timing Role: Latching monitor providing fail-safe hold-off signal to prevent brownout-induced control glitches. Use Value: Level-sensitive CLEAR input ensures reset only occurs after full recharge - avoids premature re-engagement during capacitor recovery transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC26DBVR | Fixed 2.63V threshold; no external resistor programming; push-pull output; 350nA supply current | Not programmable; lacks CLEAR input for latch reset; suited for simple reset generation, not battery protection | Select when fixed threshold suffices and ultra-low current (<1µA) is critical; not suitable for adjustable trip or manual reset scenarios |
| TPS3808G12DBVR | Adjustable threshold via resistor divider; push-pull output; 1.8µA supply current; includes watchdog timer | Includes watchdog function; no dedicated CLEAR pin - reset occurs only on VCC rise above threshold | Select when system-level supervision (reset + watchdog) is needed; avoid when independent latch reset is required for battery recovery |
Compared with TLV803EC26DBVR and TPS3808G12DBVR, the MAX834EUK-T uniquely combines programmable trip voltage, open-drain output with 11V tolerance, and a dedicated level-sensitive CLEAR input - making it optimal for battery protection where manual or controlled reset after recharge is essential.
Availability
MAX834EUK-T is available at Aetrix Electronics and suitable for battery-powered systems, precision voltage monitoring, and load-switch control requiring stable component supply and long-term lifecycle support.
Supply support for MAX834EUK-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 MAX834/MAX835 series was developed specifically for micropower, latching battery voltage supervision - targeting applications where preventing deep discharge and enabling reliable post-recharge recovery are critical design requirements.
FAQ
What is the function of the CLEAR pin on the MAX834EUK-T?
The CLEAR pin on the MAX834EUK-T is a level-sensitive asynchronous reset input. When the monitored voltage at IN exceeds the threshold (VTH), a ≥1µs high pulse on CLEAR resets the latched output (OUT goes high). If IN ≤ VTH, pulsing CLEAR has no effect - ensuring safe reset only after battery recharge or replacement. This behavior is explicitly defined in the MAX834EUK-T datasheet's Pin Description and Detailed Description sections.
Can the MAX834EUK-T monitor voltages higher than its VCC supply?
No - the MAX834EUK-T cannot directly monitor voltages higher than VCC. The IN pin voltage must remain within 0V to (VCC – 1V) per the Absolute Maximum Ratings and Electrical Characteristics tables. To monitor higher voltages (e.g., 12V rail while powered from 3.3V), a resistor divider must scale the input down to stay within this range. The MAX834EUK-T datasheet confirms this limit in the "IN Operating Voltage Range" parameter (0V to VCC – 1V).
What is the maximum allowable pull-up voltage on the MAX834EUK-T OUT pin?
The MAX834EUK-T OUT pin - an open-drain n-channel MOSFET - supports pull-up voltages up to 11V, regardless of VCC level, as specified in Note 4 of the Electrical Characteristics table and the Detailed Description section. This allows interfacing with higher-voltage logic families or direct gate drive of P-MOSFETs without level-shifting circuitry. Exceeding 11V risks permanent damage per the Absolute Maximum Ratings.
How accurate is the trip voltage of the MAX834EUK-T over temperature?
The MAX834EUK-T achieves ±1.25% threshold accuracy over the full –40°C to +85°C operating range, as confirmed in the Electrical Characteristics table under "Threshold Voltage (VTH)" with conditions TA = TMIN to TMAX. At +25°C, typical accuracy tightens to ±0.8%, and the 1.204V internal reference exhibits low drift - enabling stable trip points across industrial environments without calibration.
Does the MAX834EUK-T require external hysteresis for stable operation?
No - the MAX834EUK-T does not require external hysteresis. Its level-sensitive latch architecture inherently eliminates oscillation during slow voltage transitions near the trip point, as stated in the General Description and Detailed Description sections. This is a core differentiator versus non-latching comparators and is validated in battery-load-disconnect applications where voltage rebound after disconnect could otherwise cause chatter.
MAX834EUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.204V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 80µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX834EUK-T FAQ
1.How can I place an order for MAX834EUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX834EUK-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 MAX834EUK-T reliable?
The price and inventory of MAX834EUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX834EUK-T is usually 5 days.
3.What payment methods are accepted for MAX834EUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX834EUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX834EUK-T?
MAX834EUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX834EUK-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 MAX834EUK-T?
For technical support, including MAX834EUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX834EUK-T requirements.
6.How does Aetrix verify that MAX834EUK-T is sourced from the original manufacturer or authorized distributors?
All MAX834EUK-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 MAX834EUK-T meets industry standards.
7.What is the process for return or replacement of MAX834EUK-T?
All MAX834EUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX834EUK-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 MAX834EUK-T part is unused and in its original packaging.
Return procedure for MAX834EUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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