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Analog Devices Inc./Maxim Integrated MAX6378XR35+
- Part No.:
- MAX6378XR35+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6378XR35+.pdf
- Description:
- IC VOLT DETECT LP 3.50V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,312
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Product details
Overview
MAX6378XR35+ 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 3.50V threshold (±2.5% over temperature), 500nA supply current, push-pull output, and operates from VCC = 1.2V to 5.5V - ideal for supervising 3.3V logic rails in portable medical sensors.
For engineers reviewing the MAX6378XR35+ datasheet, MAX6378XR35+ pinout, MAX6378XR35+ application, or MAX6378XR35+ equivalent, key selection criteria include its guaranteed output state down to 1V VCC, immunity to fast transients, ±2.5% threshold accuracy, and SC70-3 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6378XR35+ implements a precision bandgap reference and comparator with internally trimmed resistors to set its 3.50V detection threshold. Its push-pull output asserts low when VCC falls below VTH and remains valid down to 1V supply, eliminating need for external biasing or pull-up networks.
It incorporates transient immunity circuitry that rejects negative-going VCC glitches up to 200µs at 50mV overdrive, and guarantees propagation delay of 9.5µs (typ) with hysteresis of 0.1mV - ensuring reliable reset assertion without chatter during brownout recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 3.50V ±2.5% over -40°C to +85°C - ensures accurate 3.3V rail supervision across industrial temperature range |
| Supply Current | 500nA typical - enables multi-year battery life in coin-cell–powered IoT endpoints |
| Output Type | Active-low push-pull - drives MCU reset pin directly without external pull-up resistor |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with 1.8V–5V systems |
| Propagation Delay | 9.5µs typical (falling edge) - provides fast, deterministic reset response for real-time systems |
| Hysteresis | 0.1mV - prevents oscillation during slow-ramping supply recovery |
| Output Drive | VOL = 0.4V @ 100µA sink - ensures clean TTL/CMOS-compatible low-level assertion |
Pinout & Package
MAX6378XR35+ is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for high-density portable PCBs. Pin 1 is GND, Pin 2 is OUT (active-low push-pull), and Pin 3 is VCC.
| 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 VCC < 3.50V; drives reset input of microcontrollers directly |
| 3 | VCC | Supply input - monitors this node; device operates down to 1.2V and asserts output reliably down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year battery life in always-on sensor nodes using CR2032 cells |
| Factory-trimmed threshold | 3.50V ±2.5% eliminates calibration overhead and reduces BOM count vs. adjustable solutions |
| Transient-immune architecture | Rejects sub-200µs VCC glitches - avoids spurious resets in noisy automotive or industrial environments |
| No external components required | Integrated reference, comparator, and resistor network reduce footprint by ≥3 mm² vs. discrete supervisor designs |
| Guaranteed operation down to 1V | Ensures correct reset state during deep brownout - critical for fail-safe shutdown in safety-critical systems |
Applications
| Battery-Powered Wearables | Industrial Sensor Nodes |
|---|---|
Use Scenario: Monitoring 3.3V regulated rail in Bluetooth LE fitness tracker powered by single Li-ion cell. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to ARM Cortex-M0+ MCU during undervoltage events. Use Value: 500nA supply current extends battery runtime by 18 months versus 2µA alternatives; SC70-3 footprint saves 1.2mm² board area. | Use Scenario: Supervising 3.3V supply in wireless vibration sensor deployed on factory machinery. IC Role / Device Role / Timing Role: Brownout detector triggering controlled firmware shutdown before EEPROM corruption occurs. Use Value: 9.5µs propagation delay ensures reset assertion within 12 clock cycles of 3.3V rail collapse; ±2.5% threshold stability prevents false triggers across -40°C to +85°C. |
| Medical Point-of-Care Devices | Smart Energy Meters |
Use Scenario: Validating main 3.3V supply in handheld blood glucose meter with CR2032 backup. IC Role / Device Role / Timing Role: Power-on reset and continuous undervoltage monitor feeding dedicated reset controller block. Use Value: Guaranteed 1V operation allows clean reset assertion even as battery depletes to 2.4V under load - meeting IEC 60601-1 reliability requirements. | Use Scenario: Supervising auxiliary 3.3V rail powering metrology ADC and RF transceiver in AMI meter. IC Role / Device Role / Timing Role: System-level voltage monitor enabling safe power-cycle sequence during grid voltage sags. Use Value: Immunity to 100µs transients prevents nuisance resets during switching noise from PLC communication bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB33DBVR | 3.3V threshold, 350nA ICC, SOT-23-3 package, open-drain output | Requires external pull-up; not pin-compatible due to different output structure and threshold | Select when lower supply current is prioritized and system design accommodates open-drain interface |
| APX803S-33SA-7 | 3.3V threshold, 600nA ICC, SOT-23-3, push-pull, ±2% accuracy | Higher accuracy but 0.2V lower threshold; same SC70/SOT-23 footprint but different marking and ordering suffix | Choose for tighter threshold tolerance where 3.3V (not 3.5V) supervision is required |
Compared with TLV803EB33DBVR and APX803S-33SA-7, the MAX6378XR35+ uniquely delivers 3.50V supervision with push-pull drive in SC70-3, enabling direct MCU reset connection without layout changes - critical for retrofitting legacy designs requiring higher trip points.
Availability
MAX6378XR35+ is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, medical point-of-care devices, smart energy meters, and portable instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for MAX6378XR35+ 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 - serving industrial, medical, and communications markets since 1983.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in space- and energy-constrained systems, emphasizing nanoscale quiescent current, factory-trimmed accuracy, and robust transient immunity.
FAQ
What is the exact factory-trimmed threshold voltage of the MAX6378XR35+?
The MAX6378XR35+ has a nominal threshold voltage of 3.50V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed at wafer test and confirmed in Table 1 of the datasheet under suffix "R35". The MAX6378XR35+ maintains this specification without external calibration.
Does the MAX6378XR35+ require an external pull-up resistor on its output?
No, the MAX6378XR35+ features an active-low push-pull output, meaning it actively drives both high and low states. Unlike open-drain supervisors, the MAX6378XR35+ does not require an external pull-up resistor - simplifying layout and reducing component count. Its VOL is specified at 0.4V when sinking 100µA.
Can the MAX6378XR35+ operate reliably when VCC drops below 1.5V?
Yes, the MAX6378XR35+ is guaranteed to maintain correct output logic state (asserted low when VCC < 3.50V) down to VCC = 1.0V. This is explicitly stated in the datasheet and validated across temperature. At 1.2V VCC, the device draws only 500nA and retains full functional integrity - critical for graceful shutdown in deeply depleted battery scenarios.
What package type and dimensions does the MAX6378XR35+ use?
The MAX6378XR35+ uses the SC70-3 package: 2.0mm × 2.1mm × 0.9mm body size with standard lead pitch. This is confirmed in the Pin Configuration diagram and Ordering Information table. The "XR" in the part number explicitly denotes SC70-3 packaging, distinguishing it from the "UR" (SOT23-3) variant.
How does the MAX6378XR35+ handle short voltage transients on the VCC line?
The MAX6378XR35+ incorporates built-in transient immunity that suppresses output assertion for negative-going VCC glitches shorter than ~200µs (at 50mV overdrive), as shown in Figure MAX6375-04. This prevents false resets caused by switching noise or ESD-induced dips - a key differentiator versus basic comparators lacking internal filtering.
MAX6378XR35+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.5V
- 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
MAX6378XR35+ FAQ
1.How can I place an order for MAX6378XR35+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6378XR35+ 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 MAX6378XR35+ reliable?
The price and inventory of MAX6378XR35+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6378XR35+ is usually 5 days.
3.What payment methods are accepted for MAX6378XR35+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6378XR35+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6378XR35+?
MAX6378XR35+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6378XR35+ 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 MAX6378XR35+?
For technical support, including MAX6378XR35+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6378XR35+ requirements.
6.How does Aetrix verify that MAX6378XR35+ is sourced from the original manufacturer or authorized distributors?
All MAX6378XR35+ 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 MAX6378XR35+ meets industry standards.
7.What is the process for return or replacement of MAX6378XR35+?
All MAX6378XR35+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6378XR35+, 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 MAX6378XR35+ part is unused and in its original packaging.
Return procedure for MAX6378XR35+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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