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Analog Devices Inc./Maxim Integrated MAX6378XR46+T
- Part No.:
- MAX6378XR46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6378XR46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:610
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Product details
Overview
MAX6378XR46+T from Maxim Integrated is an ultra-low-power, active-low voltage detector with factory-trimmed 4.63V threshold, push-pull output, and SC70-3 package. It monitors VCC supply voltage in battery-powered systems and asserts a logic-low signal when voltage drops below threshold-used for microcontroller reset supervision in portable medical devices and IoT sensors.
For engineers reviewing the MAX6378XR46+T datasheet, MAX6378XR46+T pinout, MAX6378XR46+T application, or MAX6378XR46+T equivalent, key selection criteria include its 4.63V ±2.5% threshold accuracy over -40°C to +85°C, 500nA supply current, immunity to sub-10µs VCC transients, and compatibility with 1.2V–5.5V operating range.
Technical Context
The MAX6378XR46+T implements a precision bandgap reference and comparator with internally trimmed resistors to set a fixed 4.63V detection threshold. Its push-pull output drives low without external pull-up and remains valid down to VCC = 1V.
It features built-in hysteresis (100mV typical), temperature-stable threshold (±2.5% over full temp range), and transient rejection optimized for fast negative-going VCC glitches-propagation delay is 9.5µs (falling) and 6.3µs (rising) at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 4.63V ±2.5% over -40°C to +85°C - ensures reliable reset assertion across industrial temperature range |
| Supply Current | 500nA typical - enables multi-year operation on coin-cell batteries in always-on monitoring applications |
| Operating Voltage Range | 1.2V to 5.5V - supports direct interface with Li+ batteries, 3.3V/5V rails, and brown-out detection down to ultralow VCC |
| Output Type | Active-low push-pull - eliminates need for external pull-up resistor and drives CMOS/TTL loads directly |
| Propagation Delay | 9.5µs (falling), 6.3µs (rising) at 25°C - provides timely reset response without excessive latency in power-fail detection |
| Hysteresis | 100mV typical - prevents output oscillation during slow VCC recovery near threshold |
| Transient Immunity | Rejects VCC glitches <10µs duration at 4.63V–VCC = 100mV - suppresses false resets from switching noise or load transients |
Pinout & Package
MAX6378XR46+T is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm), suitable for space-constrained PCB layouts in wearables and sensor nodes.
| 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 current when asserted; drives low without external components; compatible with 1.8V–5V logic inputs |
| 3 | VCC | Supply input - powers internal circuitry; operates from 1.2V to 5.5V; monitored voltage source for threshold comparison |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year battery life in coin-cell–powered remote sensors |
| Factory-trimmed threshold | 4.63V with ±2.5% tolerance over temperature - eliminates calibration effort and external resistor networks |
| Push-pull output architecture | No external pull-up required - reduces BOM count and layout area vs. open-drain alternatives |
| Wide VCC operating range | 1.2V to 5.5V - supports direct monitoring of single-cell Li+, NiMH, and regulated 3.3V/5V supplies |
| Transient-immune design | Rejects VCC glitches <10µs - prevents spurious resets in noisy DC/DC converter environments |
Applications
| Portable ECG Monitor | Smart Smoke Detector |
|---|---|
|
Use Scenario: Continuous battery-supplied ECG acquisition with low-power MCU sleep/wake cycles. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset to MCU when Li+ cell voltage drops below 4.63V - preventing data corruption during brown-out. Use Value: Guarantees clean system restart before analog front-end or ADC malfunctions due to undervoltage. |
Use Scenario: Battery-backed smoke alarm with self-test and wireless reporting. IC Role / Device Role / Timing Role: Monitors primary alkaline battery voltage; triggers low-battery alert and disables non-critical functions at 4.63V threshold. Use Value: Extends usable battery life by enabling precise end-of-life detection without premature shutdown. |
| Industrial Wireless Sensor Node | USB-C Power Delivery Adapter |
|
Use Scenario: LoRaWAN node powered by 3.6V Li-SOCl₂ battery with 10-year field life requirement. IC Role / Device Role / Timing Role: Resets system controller if regulated 3.3V rail collapses due to aging battery or load surge. Use Value: Prevents firmware lockup or memory corruption during undervoltage events, ensuring autonomous recovery. |
Use Scenario: USB-C PD adapter with dual-role power sourcing/sinking and real-time voltage margining. IC Role / Device Role / Timing Role: Supervises 5V VBUS line to detect input collapse and initiate graceful shutdown before PD controller fault. Use Value: Meets USB-IF robustness requirements by providing deterministic reset timing under transient overload conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V threshold, 1.6µA supply current, SOT23-5 package | Higher quiescent current; requires external capacitor for delay adjustment; not drop-in compatible | Select when adjustable delay or higher threshold accuracy (±0.5%) is required, and board space allows 5-pin footprint |
| APX803S-46SA-7 | 4.63V threshold, 0.9µA supply current, SOT23-3 package, open-drain output | Open-drain output requires pull-up; slightly higher ICC; same pinout but different drive capability | Choose when interfacing with mixed-voltage logic or where wired-OR reset bus is needed |
Compared with TPS3808G33DBVR and APX803S-46SA-7, the MAX6378XR46+T delivers lowest power (500nA), push-pull simplicity (no pull-up), and identical SC70-3 footprint - making it optimal for space- and energy-constrained designs requiring deterministic reset behavior.
Availability
MAX6378XR46+T is available at Aetrix Electronics and suitable for portable medical devices, smart home safety products, industrial wireless sensors, and USB-C power adapters requiring stable component supply and long-term lifecycle support.
Supply support for MAX6378XR46+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, automotive, and communications applications.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in battery-critical systems - delivering factory-trimmed thresholds, nanoscale current draw, and robust transient immunity in minimal 3-pin packages.
FAQ
What is the exact threshold voltage and tolerance of the MAX6378XR46+T?
The MAX6378XR46+T has a nominal threshold voltage of 4.63V with ±2.5% accuracy over the full operating temperature range of -40°C to +85°C. This specification is guaranteed by design and confirmed in the device's Electrical Characteristics table. The MAX6378XR46+T achieves this precision using internal laser-trimmed resistors and a stable bandgap reference, eliminating the need for external calibration components.
Does the MAX6378XR46+T require an external pull-up resistor on its output?
No, the MAX6378XR46+T features an active-low push-pull output that actively drives both high and low states - no external pull-up resistor is required. This simplifies PCB layout and reduces BOM cost compared to open-drain alternatives. The output can directly interface with standard CMOS or TTL inputs across its 1.2V–5.5V VCC range, and the MAX6378XR46+T maintains valid logic levels even when VCC drops to 1V.
What is the supply current consumption of the MAX6378XR46+T at room temperature?
The MAX6378XR46+T draws only 500nA typical supply current at +25°C, making it ideal for multi-year battery operation. This ultra-low ICC is consistent across its full 1.2V–5.5V operating voltage range and remains below 1.0µA over the entire -40°C to +85°C temperature range. The MAX6378XR46+T achieves this performance through optimized internal biasing and low-leakage transistor design.
Can the MAX6378XR46+T operate reliably when VCC falls below 2.0V?
Yes, the MAX6378XR46+T is fully specified to operate and assert correct output logic down to VCC = 1.0V. Its internal bandgap reference and comparator remain functional and stable throughout this range, ensuring reliable reset assertion even during deep brown-out conditions. This capability is explicitly guaranteed in the datasheet and verified across temperature, distinguishing the MAX6378XR46+T from many competing supervisors that fail below 1.8V.
How does the MAX6378XR46+T handle short voltage transients on the VCC line?
The MAX6378XR46+T incorporates inherent transient immunity: it ignores negative-going VCC glitches shorter than ~10µs when the overdrive (VTH – VCC) is 100mV, as shown in the Maximum Transient Duration vs. Threshold Overdrive graph. This prevents false resets caused by switching noise or load transients. The MAX6378XR46+T achieves this via internal filtering and hysteresis, requiring no external RC network.
MAX6378XR46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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
MAX6378XR46+T FAQ
1.How can I place an order for MAX6378XR46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6378XR46+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 MAX6378XR46+T reliable?
The price and inventory of MAX6378XR46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6378XR46+T is usually 5 days.
3.What payment methods are accepted for MAX6378XR46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6378XR46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6378XR46+T?
MAX6378XR46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6378XR46+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 MAX6378XR46+T?
For technical support, including MAX6378XR46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6378XR46+T requirements.
6.How does Aetrix verify that MAX6378XR46+T is sourced from the original manufacturer or authorized distributors?
All MAX6378XR46+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 MAX6378XR46+T meets industry standards.
7.What is the process for return or replacement of MAX6378XR46+T?
All MAX6378XR46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6378XR46+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 MAX6378XR46+T part is unused and in its original packaging.
Return procedure for MAX6378XR46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6378XR46+T Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
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