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Analog Devices Inc./Maxim Integrated MAX837EUS+T
- Part No.:
- MAX837EUS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX837EUS+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:669
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Product details
Overview
MAX837EUS+T from Maxim Integrated is a micropower voltage monitor IC with push-pull output, 1.204V precision bandgap reference, ±1.25% trip threshold accuracy, <5µA typical supply current, and SOT143-4 package-used for precision battery monitoring and load switching in battery-powered systems.
For engineers reviewing the MAX837EUS+T datasheet, MAX837EUS+T pinout, MAX837EUS+T application, or MAX837EUS+T equivalent, this page delivers verified specifications, validated pin functions, real-world use scenarios, and confirmed alternative options for voltage supervision design.
Technical Context
The MAX837EUS+T integrates a high-impedance comparator with its inverting input tied to an internal 1.204V bandgap reference and noninverting input (IN) accepting externally scaled voltages. It operates across VCC = 2.5V to 11.0V and supports trip voltage programming via two external resistors.
Unlike the open-drain MAX836, the MAX837EUS+T features a push-pull output capable of sourcing up to 500µA and sinking up to 500µA, with VOH ≥ VCC − 0.5V and VOL ≤ 0.4V at rated load-enabling direct interface with logic inputs without pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Trip Threshold Voltage | 1.204V ±1.25% - sets precise detection point for monitored voltage crossing |
| Supply Current | <5µA typical - enables multi-year operation on coin-cell batteries |
| Output Type | Push-pull - eliminates need for external pull-up resistor; drives CMOS/TTL directly |
| Operating VCC Range | 2.5V to 11.0V - supports single-cell Li-ion, multi-cell alkaline, and industrial supply rails |
| Hysteresis | 6mV - provides noise immunity against supply ripple near trip point |
| Propagation Delay | 80µs - ensures timely response for battery undervoltage shutdown |
| IN Leakage Current | ±12nA max - permits use of high-value resistor dividers without accuracy loss |
Pinout & Package
SOT143-4 (U4-1) package: 1.3mm × 1.3mm × 0.9mm body, gull-wing leads, lead-free plating per RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | System ground reference | Return path for internal reference and comparator; must be low-impedance |
| 2 VCC | Positive supply input | Power source for internal circuitry; range 2.5V–11.0V; bypass with 0.1µF capacitor |
| 3 IN | Noninverting comparator input | Accepts scaled version of monitored voltage; high-impedance (≤12nA leakage) |
| 4 OUT | Push-pull digital output | Active-high/low signal; sources/sinks 500µA; VOH ≥ VCC−0.5V, VOL ≤ 0.4V |
Key Features
| Feature | Design Value |
|---|---|
| Precision 1.204V reference | Enables accurate, temperature-stable trip points across -40°C to +85°C |
| Push-pull output architecture | Eliminates external pull-up, reduces BOM count, and improves rise/fall time (260ns/680ns) |
| Micropower operation (<5µA) | Extends battery life in portable medical, IoT, and remote sensor applications |
| Programmable trip voltage | Supports custom thresholds (e.g., 3.0V, 4.63V) using only two external resistors |
| 6mV built-in hysteresis | Prevents oscillation during slow-rising/falling supply edges or noisy environments |
Applications
| Battery Undervoltage Detection | Load Switching Control |
|---|---|
Use Scenario: Monitoring Li-ion battery voltage during discharge to prevent deep discharge below 3.0V. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset or disabling power path when VBAT falls below programmed threshold. Use Value: Prevents battery damage and system instability by triggering shutdown before cell voltage reaches critical level. | Use Scenario: Enabling/disabling a DC-DC converter or peripheral rail based on main supply status. IC Role / Device Role / Timing Role: Supervisory signal generator controlling gate of external MOSFET or enable pin of regulator. Use Value: Ensures clean power sequencing and avoids brown-out conditions during startup or fault recovery. |
| Threshold Detector for Sensors | Heater Temperature Regulation |
Use Scenario: Detecting overvoltage on analog sensor output (e.g., pressure transducer) to trigger alarm or clamp. IC Role / Device Role / Timing Role: Precision comparator with programmable trip point interfacing to microcontroller GPIO. Use Value: Adds robust, low-power fault detection independent of MCU ADC sampling or firmware latency. | Use Scenario: Cycling heater power in thermostatic control using NTC thermistor feedback network. IC Role / Device Role / Timing Role: Hysteretic comparator driving MOSFET gate to maintain setpoint temperature range. Use Value: Achieves stable on/off cycling without software or PID controller; leverages 6mV hysteresis for thermal stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBZR | Fixed 2.93V threshold; open-drain output; 350nA supply current; SOT-23-3 | No external resistor programming; lower quiescent current but inflexible trip point | Select when fixed threshold suffices and ultra-low ICC is critical; requires pull-up and layout change |
| TPS3808G01DBVR | Adjustable threshold via external resistor divider; push-pull output; 800nA supply current; SOT-23-6 | Higher pin count; includes manual reset input and watchdog timer not present in MAX837EUS+T | Select when system-level supervision (reset timing, watchdog) is required alongside voltage monitoring |
Compared with TLV803EB29DBZR and TPS3808G01DBVR, the MAX837EUS+T offers optimal balance of programmability, push-pull simplicity, and proven micropower performance in minimal 4-pin SOT143 footprint-ideal for space-constrained, cost-sensitive battery monitors where external resistor tuning is preferred over fixed thresholds.
Availability
MAX837EUS+T is available at Aetrix Electronics and suitable for battery-powered systems, precision battery monitors, and load switching applications requiring stable component supply and long-term lifecycle support.
Supply support for MAX837EUS+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 industrial, automotive, communications, and computing markets.
The MAX836/MAX837 family was engineered specifically for ultra-low-power voltage supervision in portable and energy-harvesting systems-prioritizing sub-5µA operation, small footprint, and resistor-programmable flexibility over feature-rich supervision.
FAQ
What is the function of the IN pin on the MAX837EUS+T?
The IN pin on the MAX837EUS+T is the noninverting input of the internal comparator, which compares the applied voltage (scaled via external resistor divider) against the fixed 1.204V internal bandgap reference. When the voltage at IN exceeds 1.204V, the push-pull output goes high; when it falls below, OUT goes low. This pin has ≤12nA leakage, enabling high-resistor-divider designs without accuracy degradation.
Does the MAX837EUS+T require an external pull-up resistor?
No, the MAX837EUS+T does not require an external pull-up resistor because it features a push-pull output stage capable of actively driving both high and low states. Unlike the open-drain MAX836, the MAX837EUS+T can directly interface with CMOS or TTL inputs, simplifying PCB layout and reducing component count-VOH ≥ VCC − 0.5V and VOL ≤ 0.4V under 500µA load.
What is the minimum operating voltage for the MAX837EUS+T?
The MAX837EUS+T has a specified operating VCC range of 2.5V to 11.0V. Its functional operation-including reliable trip detection and output drive-is guaranteed down to 2.5V. Below this, the internal bandgap reference and comparator may not stabilize, and output behavior is not characterized. The device remains latched in its last state down to ~1.2V, but that is outside guaranteed operation.
Can the MAX837EUS+T monitor voltages higher than its VCC supply?
No, the MAX837EUS+T cannot safely monitor voltages higher than its VCC supply. The IN pin must remain within VCC − 1V to VCC (per Absolute Maximum Ratings), meaning VIN ≤ VCC. To supervise higher voltages (e.g., 12V rail), a resistor divider must scale the input so that the voltage presented to IN stays within the allowed range while maintaining sufficient signal-to-noise ratio and accuracy.
How is hysteresis implemented in the MAX837EUS+T?
Hysteresis in the MAX837EUS+T is implemented externally using a feedback resistor (R3) from OUT to IN, as shown in Figure 2 of the datasheet. This creates positive feedback that shifts the effective trip point slightly higher on rising input and lower on falling input-yielding a total hysteresis window of 6mV. The internal comparator itself has no programmable hysteresis; the 6mV value results from the interaction between R3, R1, and R2 in the configured network.
MAX837EUS+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:
- 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-143-4
MAX837EUS+T FAQ
1.How can I place an order for MAX837EUS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX837EUS+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 MAX837EUS+T reliable?
The price and inventory of MAX837EUS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX837EUS+T is usually 5 days.
3.What payment methods are accepted for MAX837EUS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX837EUS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX837EUS+T?
MAX837EUS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX837EUS+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 MAX837EUS+T?
For technical support, including MAX837EUS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX837EUS+T requirements.
6.How does Aetrix verify that MAX837EUS+T is sourced from the original manufacturer or authorized distributors?
All MAX837EUS+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 MAX837EUS+T meets industry standards.
7.What is the process for return or replacement of MAX837EUS+T?
All MAX837EUS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX837EUS+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 MAX837EUS+T part is unused and in its original packaging.
Return procedure for MAX837EUS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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