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Analog Devices Inc./Maxim Integrated MAX835EUK+T
- Part No.:
- MAX835EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX835EUK+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,196
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Product details
Overview
MAX835EUK+T from Maxim Integrated is a micropower, latching voltage monitor IC with push-pull output, 1.204V precision bandgap reference, ±1.25% threshold accuracy, and <2µA typical supply current, used to prevent deep battery discharge in load-disconnect circuits.
For engineers reviewing the MAX835EUK+T datasheet, MAX835EUK+T pinout, MAX835EUK+T application, or MAX835EUK+T equivalent, key selection criteria include latched output behavior, SOT23-5 package compatibility, trip-threshold programmability via external resistors, and operation across +2.5V to +11V supply range.
Technical Context
The MAX835EUK+T integrates a precision 1.204V bandgap reference and comparator with level-sensitive latch control via the CLEAR input. Its push-pull output actively drives high and low without external pull-up, enabling direct interface with logic inputs or gate drivers.
It operates over -40°C to +85°C and supports programmable trip voltages (e.g., 3.3V or 4.5V) using two external resistors. The latch remains asserted until cleared-ensuring stable battery undervoltage detection even during voltage rebound after load removal.
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 Voltage Accuracy | ±1.25% - ensures reliable trip point across temperature and unit variation |
| Supply Current (Typ) | <2µA at +25°C - enables multi-year battery life in always-on monitoring |
| Output Type | Push-pull - eliminates need for external pull-up resistor; sinks/sours ≥500µA |
| Propagation Delay | 80µs (typ) - fast enough for real-time battery disconnect before critical depletion |
| Latch Reset Pulse Width | ≥1µs on CLEAR - compatible with simple RC or button-based reset circuits |
| Operating Temperature | -40°C to +85°C - suitable for industrial and automotive battery environments |
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 |
|---|---|---|
| 1 - CLEAR | Asynchronous reset input | Pulse high ≥1µs with IN > VTH to release latch; tie to VCC for transparent mode |
| 2 - GND | Analog and digital ground reference | Common return path for reference, comparator, and output stages |
| 3 - VCC | Positive supply input | Power source for internal reference, comparator, and push-pull driver (2.5V–11V) |
| 4 - IN | Noninverting comparator input | Monitors divided-down voltage; high-impedance (>1GΩ) minimizes resistor network loading |
| 5 - OUT | Active-low latched output | Push-pull structure drives low (≤0.4V @ 500µA) or high (VCC–0.5V @ 500µA) |
Key Features
| Feature | Design Value |
|---|---|
| Latched output with CLEAR control | Prevents false re-engagement after battery voltage recovers post-disconnect |
| Programmable trip voltage | Set precisely via R1/R2 divider; supports 2.5V–10V range with 1.204V internal reference |
| Ultra-low quiescent current | <2µA typical enables decades of shelf life in coin-cell-powered devices |
| Push-pull output stage | Directly drives MOSFET gates or microcontroller interrupt pins without pull-up components |
| Level-sensitive latch architecture | Eliminates need for external hysteresis circuitry in battery-monitoring applications |
Applications
| Battery Undervoltage Protection | Load-Switch Control |
|---|---|
Use Scenario: Monitoring lead-acid or NiCd battery voltage during discharge to avoid irreversible capacity loss. IC Role / Device Role / Timing Role: Latching voltage monitor asserting active-low signal when battery falls below programmed threshold. Use Value: Prevents deep discharge by holding disconnect state until manual or automatic reset via CLEAR pulse. | Use Scenario: Enabling/disabling power to peripheral modules (e.g., sensors, radios) based on system voltage health. IC Role / Device Role / Timing Role: System-level voltage supervisor triggering MOSFET gate driver to isolate non-critical loads. Use Value: Push-pull output provides clean, rail-to-rail switching without external biasing-reducing BOM count and layout area. |
| Portable Medical Device Safety | Industrial Data Logger Power Management |
Use Scenario: Ensuring safe shutdown of handheld diagnostic tools before battery reaches unsafe operating voltage. IC Role / Device Role / Timing Role: Fault-detection element in safety-critical power path, interfacing with MCU reset or watchdog circuitry. Use Value: ±1.25% threshold accuracy and -40°C to +85°C operation guarantee consistent behavior across clinical environments. | Use Scenario: Long-term remote data collection in unattended field deployments powered by primary lithium batteries. IC Role / Device Role / Timing Role: Low-power supervisory node that initiates graceful shutdown and memory save before brownout. Use Value: Sub-2µA supply current extends operational lifetime beyond 5 years on a single CR123A cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC26DBVR | Fixed 2.63V threshold; no CLEAR pin; open-drain output; 0.8µA supply current | Lacks latch reset capability and programmable trip point; suited only for simple reset generation | Select when fixed threshold and minimal current are prioritized over flexible battery protection logic |
| TPS3808G18DBVR | Adjustable threshold via resistor divider; push-pull output; 1.8µA supply current; includes manual reset pin | Requires external capacitor for delay; lacks level-sensitive latch-uses edge-triggered reset | Choose when timing-controlled reset delay is needed, but latch persistence must be implemented externally |
Compared with TLV809EC26DBVR and TPS3808G18DBVR, the MAX835EUK+T uniquely combines programmable trip voltage, true level-sensitive latch with asynchronous CLEAR, and push-pull drive-all in a 5-pin SOT23 package-making it optimal for autonomous battery disconnect systems requiring zero external components beyond R1/R2.
Availability
MAX835EUK+T is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial data loggers, portable instrumentation, and energy-harvesting systems requiring stable component supply and long-term lifecycle support.
Supply support for MAX835EUK+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, medical, and communications applications.
The MAX835EUK+T belongs to Maxim's micropower voltage monitor product line, engineered specifically for ultra-low-power battery supervision and autonomous load-disconnect functionality in space-constrained portable systems.
FAQ
What is the function of the CLEAR pin on the MAX835EUK+T?
The CLEAR pin on the MAX835EUK+T is an asynchronous reset input that releases the latched output. When the monitored voltage exceeds the programmed trip threshold, a high pulse ≥1µs on CLEAR forces OUT high. If CLEAR is tied to VCC, the latch becomes transparent-OUT follows comparator state in real time. This behavior is essential for controlled recovery after battery recharge or replacement in the MAX835EUK+T.
Can the MAX835EUK+T monitor voltages higher than its VCC supply?
No-the MAX835EUK+T cannot safely monitor voltages exceeding its VCC supply. The IN pin must remain within 0V to (VCC – 1V) per datasheet specifications. To monitor higher voltages (e.g., 12V battery), use a resistor divider referenced to VCC, ensuring the divided voltage at IN stays below VCC – 1V. The MAX835EUK+T's internal reference and comparator are designed for rail-referenced sensing-not high-side independent monitoring.
How is the trip voltage programmed on the MAX835EUK+T?
The trip voltage on the MAX835EUK+T is set using two external resistors (R1 and R2) forming a voltage divider from the monitored rail to GND, with the junction connected to the IN pin. The formula is VTRIP = 1.204V × (R1 + R2)/R2. For example, R1 = 270kΩ and R2 = 100kΩ yields ~4.5V trip. R2 should be 500kΩ–1MΩ to minimize current draw while maintaining accuracy-this resistor network defines the core detection threshold of the MAX835EUK+T.
Does the MAX835EUK+T require external hysteresis?
No-the MAX835EUK+T does not require external hysteresis. Its level-sensitive latch architecture inherently prevents oscillation during slow voltage transitions near the trip point. Once OUT goes low due to falling input voltage, it remains latched low-even if the monitored voltage rises slightly above threshold-until explicitly reset via the CLEAR pin. This eliminates design complexity and component count versus comparators needing external positive feedback, a key functional advantage of the MAX835EUK+T.
What is the maximum sink/source capability of the MAX835EUK+T output?
The MAX835EUK+T push-pull output can sink up to 500µA while maintaining VOL ≤ 0.4V and source up to 500µA while maintaining VOH ≥ VCC – 0.5V, per datasheet test conditions. Short-circuit current is ~12mA at VCC = 5V. This drive strength allows direct interfacing with logic inputs, small-signal MOSFET gates, or optocoupler LEDs-no buffer stage required. The robust output performance is integral to the MAX835EUK+T's role in self-contained battery protection circuits.
MAX835EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 80µs Typical Propagation Delay
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX835EUK+T FAQ
1.How can I place an order for MAX835EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX835EUK+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 MAX835EUK+T reliable?
The price and inventory of MAX835EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX835EUK+T is usually 5 days.
3.What payment methods are accepted for MAX835EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX835EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX835EUK+T?
MAX835EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX835EUK+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 MAX835EUK+T?
For technical support, including MAX835EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX835EUK+T requirements.
6.How does Aetrix verify that MAX835EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX835EUK+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 MAX835EUK+T meets industry standards.
7.What is the process for return or replacement of MAX835EUK+T?
All MAX835EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX835EUK+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 MAX835EUK+T part is unused and in its original packaging.
Return procedure for MAX835EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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