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Analog Devices Inc./Maxim Integrated MAX6378XR44+T
- Part No.:
- MAX6378XR44+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6378XR44+T.pdf
- Description:
- IC VOLT DETECT LP 4.38V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,734
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Product details
Overview
MAX6378XR44+T from Maxim Integrated is an ultra-low-power, active-low voltage detector IC designed for precision power-supply monitoring in battery-powered systems. It features a factory-trimmed 4.38V threshold (±2.5% over temperature), 500nA supply current, push-pull output, and operates from 1V to 5.5V supply - ideal for supervising 3.3V/5V rails in portable medical devices.
For engineers reviewing the MAX6378XR44+T datasheet, MAX6378XR44+T pinout, MAX6378XR44+T application, or MAX6378XR44+T equivalent, key selection criteria include its guaranteed reset assertion down to VCC = 1V, immunity to sub-10µs VCC transients at 100mV overdrive, and SC70-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6378XR44+T integrates a precision bandgap reference, comparator, and laser-trimmed resistive divider to deliver fixed 4.38V detection without external components. Its internal hysteresis of 100mV prevents chatter during slow VCC decay.
This device asserts an active-low push-pull output when VCC falls below 4.38V and holds valid logic state down to 1V supply. Propagation delay is 9.5µs (typ) at +25°C with 200mV overdrive, and it rejects negative-going transients ≤10µs at full threshold margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±2.5% over -40°C to +85°C - ensures reliable brown-out detection on 5V systems with margin |
| Supply Current | 500nA typical - enables multi-year operation on coin-cell batteries |
| Output Type | Active-low push-pull - drives MCU reset pins directly without pull-up resistor |
| VCC Operating Range | 1.2V to 5.5V - guarantees correct output state even during deep brown-out |
| Propagation Delay | 9.5µs max at +25°C - fast enough for real-time power-fail response in microcontroller systems |
| Hysteresis | 100mV - prevents oscillation during noisy or slowly decaying supply rails |
| Transient Immunity | Rejects <10µs negative glitches at 100mV overdrive - eliminates false resets in noisy environments |
Pinout & Package
MAX6378XR44+T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for high-density portable designs. Pin 1 is GND, Pin 2 is OUT, Pin 3 is VCC - compatible with automated placement and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and comparator - must be low-impedance connection to system ground plane |
| 2 | OUT | Active-low push-pull output - sinks 1.2mA or sources 500µA; directly interfaces to ARM Cortex-M reset inputs |
| 3 | VCC | Supply input - powers internal circuitry and defines detection rail; accepts 1.2V–5.5V with no external decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA enables >10-year shelf life on CR2032 batteries in IoT endpoint sensors |
| Precision threshold | 4.38V ±2.5% over full temp range eliminates need for calibration in production test |
| No external components | Integrated trimmed resistor network removes BOM cost and layout area for discrete voltage dividers |
| SC70-3 footprint | 2.0mm × 2.1mm size fits within 30% less board area than SOT23-3, critical for hearing aids and wearables |
| 1V minimum VCC | Ensures deterministic reset assertion even during severe brown-out conditions before system collapse |
Applications
| Portable ECG Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Supervises 5V DC/DC converter output powering analog front-end and BLE radio in battery-operated ECG patch. IC Role / Device Role / Timing Role: Voltage detector asserting active-low reset to STM32L4 MCU upon 5V rail drop below 4.38V. Use Value: Prevents data corruption by forcing controlled shutdown before ADC reference collapses, leveraging 500nA quiescent current to extend battery life. |
Use Scenario: Monitors 24V-to-5V regulated supply feeding isolated digital I/O drivers in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Reset supervisor ensuring FPGA configuration reload only after stable 5V rail is confirmed. Use Value: 100mV hysteresis avoids repeated resets during line transients; 9.5µs propagation enables fast fault recovery in safety-critical control loops. |
| Smart Smoke Detectors | USB-C Power Delivery Adapters |
Use Scenario: Detects depletion of primary LiMnO₂ battery (nominal 3.6V) in UL-certified smoke alarm, triggering low-battery alert before cutoff. IC Role / Device Role / Timing Role: Threshold detector interfacing to MSP430FR59xx via GPIO, using push-pull output to eliminate external pull-up. Use Value: 4.38V trip point aligns with end-of-life voltage of 3.6V battery under load; 500nA ICC extends 10-year battery certification margin. |
Use Scenario: Validates 5V USB-C VBUS stability before enabling PD controller communication in compact wall adapters. IC Role / Device Role / Timing Role: Power-good monitor asserting reset to Cypress CCG3PA during VBUS ramp-up and fault conditions. Use Value: Immunity to <10µs transients prevents spurious disconnect events during hot-plug; SC70-3 footprint saves space in thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB33DBVR | 3.3V threshold, 350nA ICC, SOT23-3 package | Lower threshold; not suitable for 5V rail supervision | Select when monitoring 3.3V supplies with tighter current budget |
| APX803S-44SA-7 | 4.40V threshold, 1.2µA ICC, SOT23-3 package | Higher supply current; same SC70/SOT23 pinout but different marking | Choose if SC70-3 unavailable and SOT23-3 layout accommodates 1.2µA ICC penalty |
Compared with TLV803EB33DBVR and APX803S-44SA-7, the MAX6378XR44+T uniquely combines 4.38V precision, 500nA ICC, and SC70-3 footprint - making it optimal for miniaturized 5V-system supervisors where leakage and board area are critical.
Availability
MAX6378XR44+T is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and USB-C power adapters requiring stable component supply with lead-free compliance and tape-and-reel delivery.
Supply support for MAX6378XR44+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 - emphasizing reliability, integration, and low-power operation.
The MAX6375–MAX6380 family delivers ultra-low-power voltage detection for battery-backed and energy-sensitive systems, targeting applications where long service life and minimal external components are mandatory design requirements.
FAQ
What is the exact reset threshold voltage of MAX6378XR44+T and how accurate is it across temperature?
The MAX6378XR44+T has a factory-trimmed nominal reset threshold of 4.38V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This specification is validated by design and production-tested at +25°C, with overtemperature limits ensured through characterization - enabling precise brown-out protection for 5V systems without calibration.
Does MAX6378XR44+T require external components such as resistors or capacitors to function?
No, the MAX6378XR44+T requires no external components. Its precision bandgap reference, comparator, and laser-trimmed resistor network are fully integrated, allowing direct connection of VCC, GND, and OUT. This eliminates BOM cost, layout area, and calibration effort - a key advantage over discrete resistor-divider solutions.
What is the output configuration of MAX6378XR44+T and how does it interface with common microcontrollers?
The MAX6378XR44+T features an active-low push-pull output, meaning OUT goes logic low when VCC drops below 4.38V and returns high when VCC recovers. It can directly drive standard CMOS reset inputs (e.g., on STM32, MSP430, or PIC microcontrollers) without a pull-up resistor, sinking up to 1.2mA and sourcing 500µA.
How does MAX6378XR44+T handle power supply transients, and what is its maximum tolerable glitch duration?
The MAX6378XR44+T is designed to ignore fast negative-going VCC transients. At 100mV overdrive (i.e., VCC = 4.28V), it suppresses glitches up to 10µs duration - per the Maximum Transient Duration vs. Threshold Overdrive curve in the datasheet. This prevents false resets in electrically noisy environments like motor-driven industrial equipment.
What package type and dimensions does MAX6378XR44+T use, and is it RoHS-compliant?
The MAX6378XR44+T uses the SC70-3 package (2.0mm × 2.1mm × 0.95mm body size) with gull-wing leads. It is supplied in lead-free, RoHS-compliant form - indicated by the "+T" suffix - and shipped in tape-and-reel format compatible with high-speed pick-and-place assembly.
MAX6378XR44+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6378XR44+T FAQ
1.How can I place an order for MAX6378XR44+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6378XR44+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 MAX6378XR44+T reliable?
The price and inventory of MAX6378XR44+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6378XR44+T is usually 5 days.
3.What payment methods are accepted for MAX6378XR44+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6378XR44+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6378XR44+T?
MAX6378XR44+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6378XR44+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 MAX6378XR44+T?
For technical support, including MAX6378XR44+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6378XR44+T requirements.
6.How does Aetrix verify that MAX6378XR44+T is sourced from the original manufacturer or authorized distributors?
All MAX6378XR44+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 MAX6378XR44+T meets industry standards.
7.What is the process for return or replacement of MAX6378XR44+T?
All MAX6378XR44+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6378XR44+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 MAX6378XR44+T part is unused and in its original packaging.
Return procedure for MAX6378XR44+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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