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Analog Devices Inc./Maxim Integrated MAX834EUK
- Part No.:
- MAX834EUK
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX834EUK.pdf
- Description:
- LATCHING VOLTAGE MONITORS
- Quantity:
- Payment:
- Shipping:
Inventory:71,903
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Product details
Overview
MAX834EUK from Maxim Integrated is a micropower, latching voltage monitor IC with precision 1.204V bandgap reference, open-drain n-channel output, and level-sensitive CLEAR input - designed for battery undervoltage detection in portable systems. It operates from +2.5V to +11V, draws <2µA typical supply current, features ±1.25% threshold accuracy, and prevents deep battery discharge via latched output behavior.
For engineers reviewing the MAX834EUK datasheet, MAX834EUK pinout, MAX834EUK application, or MAX834EUK equivalent, this device is selected for low-power battery monitoring where trip voltage programmability, latch persistence, and ultra-low ICC are critical - especially in load-disconnect circuits requiring reliable reset control and minimal quiescent drain.
Technical Context
The MAX834EUK integrates a precision comparator with internal 1.204V reference and a level-sensitive latch, eliminating external hysteresis requirements in battery-monitoring applications. Its open-drain output supports pull-up to voltages up to 11V (independent of VCC), enabling flexible interface with higher-voltage logic or discrete FET gate drivers.
Threshold voltage is set externally using two resistors (R1/R2) per VTRIP = 1.204 × (R1 + R2)/R2, supporting programmable trip points from ~1.5V to >10V. The CLEAR input requires ≥1µs high pulse (with VIN > VTH) to reset the latched output - a feature critical for controlled re-engagement after battery recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V - supports wide-input battery systems including multi-cell Li-ion and lead-acid. |
| Threshold Voltage Accuracy | ±1.25% at +25°C - ensures precise undervoltage detection without calibration. |
| Supply Current (ICC) | <2µA typical - enables multi-year operation on coin-cell or small Li primary batteries. |
| Input Leakage Current | ±3nA at VTH - permits use of high-value resistor dividers (e.g., 1MΩ) without trip error. |
| Propagation Delay | 80µs typical (50mV overdrive) - fast enough for real-time battery disconnect before damage occurs. |
| Output Type | Open-drain n-channel - allows pull-up to voltage > VCC (up to 11V), enabling level-shifting and direct FET gate drive. |
| Clear Input Pulse Width | ≥1µs - defines minimum RESET timing for reliable latch reset during battery recovery. |
Pinout & Package
SOT23-5 package (5-pin, surface-mount, 3.099mm × 1.499mm footprint per EIA481-1 standard; top mark AAAX).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CLEAR | Asynchronous reset input | Level-sensitive active-high signal; ≥1µs pulse required to unlatch OUT when VIN > VTH. |
| 2 - GND | Analog/digital ground reference | Common return for reference, comparator, and latch; must be low-impedance for stable threshold. |
| 3 - VCC | Power supply input | Supplies internal circuitry; functional down to 1.2V (output retains state even as VCC falls). |
| 4 - IN | Noninverting comparator input | Accepts divided monitored voltage; high-impedance (±3nA leakage) enables accurate resistor-divider design. |
| 5 - OUT | Open-drain latched output | Active-low output; sinks current only - requires external pull-up; compatible with 11V max pull-up voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Latched output behavior | Once triggered low by falling VIN, OUT remains low until explicitly reset via CLEAR - prevents oscillation during battery voltage relaxation. |
| Programmable trip voltage | VTRIP = 1.204 × (R1 + R2)/R2 - supports custom thresholds from ~1.5V to >10V using standard resistor values. |
| Ultra-low supply current | <2µA typical - extends battery life in always-on monitoring applications such as smoke detectors or asset trackers. |
| Open-drain output with extended pull-up range | OUT can be pulled up to 11V regardless of VCC - enables direct drive of high-side PMOS or logic interfaces operating above VCC. |
| Level-sensitive CLEAR input | No edge-triggering required - simplifies reset circuitry using RC networks, pushbuttons, or microcontroller GPIO. |
Applications
| Portable Medical Devices | Smart Meters |
|---|---|
|
Use Scenario: Continuous battery-powered operation in handheld glucose monitors or infusion pumps where undervoltage must trigger safe shutdown before data corruption or motor stall. IC Role / Device Role: Primary undervoltage detector that disables power path and asserts fault flag to MCU upon VBAT drop below 3.0V. Use Value: Latched output ensures system stays off until user replaces/recharges battery - preventing repeated brownout cycles and EEPROM corruption. |
Use Scenario: Long-life AMI meter with sealed Li-SOCl₂ battery requiring >15-year operation and guaranteed shutdown before electrolyte depletion. IC Role / Device Role: Precision battery health monitor that triggers permanent disconnect at 2.85V (programmed via 180kΩ/100kΩ divider) to preserve residual capacity. Use Value: ±1.25% threshold accuracy and <2µA ICC enable predictable end-of-life detection without periodic calibration or firmware intervention. |
| Industrial IoT Sensors | Backup Power Systems |
|
Use Scenario: Remote LoRaWAN node powered by primary lithium battery, transmitting status every 12 hours - must avoid deep discharge during infrequent wake-ups. IC Role / Device Role: Standby-mode voltage supervisor that disables RF transceiver and sensor bias when VBAT falls below 2.7V. Use Value: High-impedance IN input (±3nA) allows use of 1MΩ resistor divider, reducing standby current contribution to <1nA - negligible vs. battery self-discharge. |
Use Scenario: Telecom base station with supercapacitor backup; MAX834EUK monitors capacitor voltage and disables load before voltage drops below 2.5V. IC Role / Device Role: Supercap voltage guard that asserts latch to disable DC-DC converter when VCAP falls below programmed threshold. Use Value: Open-drain OUT pulls up to 5V logic rail (independent of VCC), enabling clean interface with existing 5V supervisor logic without level translators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC26DBZR | Fixed 2.63V threshold, no CLEAR input, push-pull output, 350nA ICC | Lacks latch reset capability and programmability - suitable only for simple reset generation, not battery protection. | Select when fixed threshold and lowest possible ICC (<0.4µA) outweigh need for latch control and trip customization. |
| MAX6375XS26+T | Fixed 2.63V threshold, integrated watchdog timer, 1.6µA ICC, SOT23-5 | Includes watchdog function but no CLEAR pin or programmable trip - limited to basic reset + timeout supervision. | Choose when system-level reliability requires both power-on reset and software watchdog, and trip point is fixed at 2.63V. |
Compared with TLV809EC26DBZR and MAX6375XS26+T, the MAX834EUK uniquely combines programmable trip voltage, latched output with explicit CLEAR control, and open-drain flexibility - making it irreplaceable in battery-protection circuits demanding configurable, persistent undervoltage response.
Availability
MAX834EUK is available at Aetrix Electronics and suitable for portable medical devices, smart meters, industrial IoT sensors, and backup power systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX834EUK 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 high-reliability industrial, medical, and communications applications.
The MAX834EUK belongs to Maxim's micropower voltage monitor product line - engineered specifically for battery-operated systems needing accurate, latch-based undervoltage detection with minimal quiescent current and flexible interface options.
FAQ
What is the exact threshold voltage reference inside the MAX834EUK?
The MAX834EUK contains an internal precision 1.204V bandgap reference used as the comparator's inverting input. This reference is trimmed to ±1.25% accuracy over temperature and supplies the stable reference against which the external voltage at the IN pin is compared - enabling highly repeatable trip-point programming across units and conditions.
Can the MAX834EUK monitor a voltage higher than its own VCC supply?
Yes - the MAX834EUK's IN pin accepts input voltages up to VCC − 1V, and its open-drain OUT can be pulled up to 11V regardless of VCC. However, the monitored voltage itself (applied to IN via resistor divider) must remain within the specified IN operating range (0V to VCC − 1V); higher voltages require scaling via external resistors to stay within that limit while preserving accuracy.
How does the CLEAR input function in the MAX834EUK?
The CLEAR input on the MAX834EUK is level-sensitive and asynchronous: applying a high pulse ≥1µs resets the latched output (driving OUT high) only if the IN voltage exceeds the programmed threshold (VIN > VTH). If VIN remains below VTH, pulsing CLEAR has no effect - ensuring safe reset only when battery voltage has recovered sufficiently.
What is the maximum allowable pull-up voltage on the MAX834EUK OUT pin?
The MAX834EUK OUT pin supports pull-up voltages up to 11V, independent of the VCC supply voltage. This allows interfacing with higher-voltage logic families or direct driving of PMOS gate terminals without level-shifting components - a key advantage over push-pull alternatives like the MAX835 or fixed-threshold supervisors.
Does the MAX834EUK require external hysteresis for stable operation?
No - the MAX834EUK incorporates a level-sensitive latch architecture that eliminates the need for external hysteresis. Once triggered low by a falling input voltage, the output remains latched low until explicitly reset via the CLEAR pin, preventing chatter or oscillation during slow battery voltage recovery - a critical feature for reliable battery protection.
MAX834EUK 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 FAQ
1.How can I place an order for MAX834EUK through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX834EUK 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 reliable?
The price and inventory of MAX834EUK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX834EUK is usually 5 days.
3.What payment methods are accepted for MAX834EUK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX834EUK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX834EUK?
MAX834EUK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX834EUK 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?
For technical support, including MAX834EUK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX834EUK requirements.
6.How does Aetrix verify that MAX834EUK is sourced from the original manufacturer or authorized distributors?
All MAX834EUK 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 meets industry standards.
7.What is the process for return or replacement of MAX834EUK?
All MAX834EUK units undergo pre-shipment inspection (PSI). If there is an issue with MAX834EUK, 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 part is unused and in its original packaging.
Return procedure for MAX834EUK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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