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Analog Devices Inc./Maxim Integrated MAX836EUS+T
- Part No.:
- MAX836EUS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX836EUS+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:7,906
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Product details
Overview
MAX836EUS+T from Maxim Integrated is a micropower voltage monitor IC with open-drain n-channel output, 1.204V precision bandgap reference, ±1.25% trip threshold accuracy, <5µA typical supply current, and SOT143-4 package. It monitors system supply (VCC) or external voltages in battery-powered systems requiring reliable low-power reset or enable signaling.
For engineers reviewing the MAX836EUS+T datasheet, MAX836EUS+T pinout, MAX836EUS+T application, or MAX836EUS+T equivalent, key selection criteria include trip threshold programmability via external resistors, guaranteed operation down to VCC = 2.5V, open-drain output compatibility with higher-voltage pull-ups (≤11V), and -40°C to +85°C industrial temperature range.
Technical Context
The MAX836EUS+T integrates a precision 1.204V bandgap reference and high-impedance comparator in a single die. Its noninverting input (IN) compares externally divided voltage against the internal reference; the inverting input is fixed at 1.204V.
It features monotonic supply current vs. VCC (2.5V–11.0V), 6mV built-in hysteresis, and propagation delay of 80µs (typ) with 35µs glitch immunity. The open-drain output supports level-shifting and wired-OR configurations without requiring matching supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Trip Threshold Voltage | 1.204V ±1.25% - sets precise detection point for VCC or external monitored voltage |
| Supply Voltage Range | 2.5V to 11.0V - supports wide-input battery and industrial supply monitoring |
| Supply Current | <5µA typical - enables multi-year operation on coin-cell batteries |
| Output Type | Open-drain n-channel - allows pull-up to voltage > VCC (up to 11V) and wired-OR logic |
| Hysteresis | 6mV - provides noise immunity and prevents chatter near threshold |
| Propagation Delay | 80µs typical - ensures timely response for power-fail or brownout detection |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive under-hood environments |
Pinout & Package
SOT143-4 (U4-1) surface-mount package, 1.3mm × 1.3mm × 0.9mm body, lead-free, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | System ground reference | Return path for internal reference and comparator; must be low-impedance connection |
| 2 VCC | Power supply input | Supplies internal circuitry; operates from 2.5V to 11.0V; powers reference and comparator |
| 3 IN | Noninverting comparator input | High-impedance node (≤12nA leakage); accepts resistor-divided monitored voltage |
| 4 OUT | Open-drain n-channel output | Drains current when asserted; requires external pull-up; compatible with 11V max pull-up voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±1.25% trip threshold accuracy | Enables precise undervoltage lockout (UVLO) without calibration across temperature |
| 1.204V internal bandgap reference | Stable reference independent of VCC variation; eliminates need for external reference IC |
| <5µA supply current | Extends battery life in always-on monitoring applications such as RTC backup or sensor wake-up |
| Open-drain output with 11V max pull-up | Supports level translation between disparate supply domains (e.g., 3.3V monitor controlling 5V rail) |
| 6mV built-in hysteresis | Reduces false triggering in noisy environments without external components |
Applications
| Battery-Powered System Monitor | Precision Undervoltage Lockout (UVLO) |
|---|---|
|
Use Scenario: Monitoring Li-ion battery voltage during discharge to prevent deep discharge below 2.8V. IC Role / Device Role / Timing Role: Voltage monitor asserting open-drain reset signal when battery drops below programmed threshold. Use Value: Prevents irreversible capacity loss by disabling load before cell voltage reaches critical minimum. |
Use Scenario: Enabling power sequencing in FPGA-based embedded systems where core voltage must remain above 0.85V. IC Role / Device Role / Timing Role: UVLO detector generating clean enable signal to PMIC or LDO based on scaled VCC feedback. Use Value: Guarantees safe startup/shutdown by holding downstream logic in reset until stable supply is confirmed. |
| Load Switch Control | Heater Temperature Regulation |
|
Use Scenario: Controlling power to peripheral modules (e.g., GPS, BLE radio) only when main rail exceeds 3.0V. IC Role / Device Role / Timing Role: Threshold detector driving gate of external n-channel MOSFET to enable/disable load. Use Value: Eliminates quiescent current draw from inactive subsystems, reducing total system standby power. |
Use Scenario: Cycling heating element in industrial thermostat using NTC thermistor feedback network. IC Role / Device Role / Timing Role: Comparator comparing thermistor divider voltage against 1.204V reference to toggle heater ON/OFF. Use Value: Achieves stable temperature setpoint with hysteresis-controlled on/off cycling without microcontroller intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809DBZT | Fixed 3.08V threshold; SOT-23-3; push-pull output; 0.9µA supply current | No external resistor programming; no open-drain flexibility; lower supply current but less versatile trip setting | Select when fixed threshold suffices and ultra-low current dominates design priority over configurability |
| MAX6326UR29+T | Fixed 2.93V threshold; SOT-23-3; open-drain; 1.6µA supply current; 200ms reset timeout | Includes built-in reset timer; no hysteresis adjustment; smaller footprint but no adjustable trip voltage | Choose when system-level reset timing is required and trip point matches standard 2.93V UVLO profile |
Compared with TLV809DBZT and MAX6326UR29+T, the MAX836EUS+T uniquely supports user-programmable trip thresholds via two external resistors, retains open-drain output for flexible interface design, and delivers industrial-grade temperature stability without sacrificing micropower operation.
Availability
MAX836EUS+T is available at Aetrix Electronics and suitable for battery-powered systems, precision undervoltage lockout circuits, and load-switch control applications requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX836EUS+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and communications markets.
The MAX836EUS+T belongs to Maxim's micropower voltage monitor product line, engineered specifically for ultra-low-current, high-accuracy supply monitoring in space- and energy-constrained portable and remote systems.
FAQ
What is the function of the IN pin on the MAX836EUS+T?
The IN pin on the MAX836EUS+T is the noninverting input of the internal comparator, which compares an externally applied voltage (typically derived from VCC via resistor divider) against the fixed 1.204V internal bandgap reference. Its high input impedance (≤12nA leakage) enables use of large-value resistors without degrading trip accuracy. This pin determines when the open-drain OUT pin asserts based on the programmed threshold voltage.
Can the MAX836EUS+T monitor voltages higher than its VCC supply?
No-the MAX836EUS+T cannot directly monitor voltages higher than VCC at the IN pin. Per Absolute Maximum Ratings and Applications Information, VIN must be ≤ VCC – 1V. However, its open-drain OUT pin supports pull-up voltages up to 11V, enabling interface with higher-voltage logic or rails-this is distinct from input monitoring capability.
What is the maximum allowable pull-up voltage for the MAX836EUS+T open-drain output?
The MAX836EUS+T open-drain output can be pulled up to a maximum of 11V, as specified in the Absolute Maximum Ratings and Detailed Description sections. This allows interfacing with higher-voltage systems (e.g., 5V or 10V logic) while powered from a lower VCC (e.g., 3.3V), provided the pull-up voltage does not exceed 11V and remains within absolute maximum limits.
How is hysteresis implemented in the MAX836EUS+T, and what value is built-in?
The MAX836EUS+T includes 6mV of internal hysteresis, which improves noise immunity and prevents output oscillation near the trip threshold. This fixed hysteresis is inherent to the comparator design and does not require external components. For enhanced hysteresis, external resistor networks (e.g., R3 in Figure 2 of the datasheet) can be added to the IN node, though the base 6mV is always active.
Does the MAX836EUS+T require an external capacitor, and if so, where is it placed?
Yes-a 0.1µF bypass capacitor is recommended between VCC and GND, placed as close as possible to the MAX836EUS+T pins. This capacitor stabilizes the internal bandgap reference and suppresses supply noise that could affect trip accuracy. The Typical Operating Circuit and Applications Information explicitly specify this decoupling requirement for reliable operation.
MAX836EUS+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- 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:
- Open Drain or Open Collector
- 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-143-4
MAX836EUS+T FAQ
1.How can I place an order for MAX836EUS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX836EUS+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 MAX836EUS+T reliable?
The price and inventory of MAX836EUS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX836EUS+T is usually 5 days.
3.What payment methods are accepted for MAX836EUS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX836EUS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX836EUS+T?
MAX836EUS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX836EUS+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 MAX836EUS+T?
For technical support, including MAX836EUS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX836EUS+T requirements.
6.How does Aetrix verify that MAX836EUS+T is sourced from the original manufacturer or authorized distributors?
All MAX836EUS+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 MAX836EUS+T meets industry standards.
7.What is the process for return or replacement of MAX836EUS+T?
All MAX836EUS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX836EUS+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 MAX836EUS+T part is unused and in its original packaging.
Return procedure for MAX836EUS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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