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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:2,286
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Product details
Overview
MAX6378XR46-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 4.63V threshold (±2.5% over temperature), 500nA supply current, push-pull output, and operates from 1V to 5.5V VCC - ideal for supervising Li+ charger outputs or 5V rail integrity in portable medical sensors.
For engineers reviewing the MAX6378XR46-T datasheet, MAX6378XR46-T pinout, MAX6378XR46-T application, or MAX6378XR46-T equivalent, this device delivers verified reset assertion timing, transient-immune detection, and SC70-3 footprint compatibility critical for space-constrained, low-quiescent-current designs.
Technical Context
The MAX6378XR46-T implements a precision bandgap reference and comparator with internally trimmed resistors to set its 4.63V trip point. Its push-pull output asserts logic low when VCC falls below threshold and remains valid down to 1V VCC, enabling brownout detection even during deep discharge.
It rejects fast transients via built-in immunity circuitry - maximum allowable negative-going VCC glitch duration is ≤140µs at 10mV overdrive - and requires no external components. All six members of the MAX6375–MAX6380 family share identical SC70-3/SOT23-3 pinouts and operating temperature range (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±2.5% over –40°C to +85°C - ensures reliable 5V 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 directly without pull-up resistor, reducing BOM count |
| VCC Operating Range | 1.0V to 5.5V - supports detection during deep brownout and full 5V operation |
| Propagation Delay | 9.5µs typical (falling edge) - provides fast response to undervoltage events without false triggering |
| Hysteresis | 100mV - prevents chatter near threshold during slow VCC recovery |
| Tempco | 40ppm/°C - maintains tight threshold stability across temperature without calibration |
Pinout & Package
MAX6378XR46-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.9mm), optimized for high-density 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 standard CMOS inputs directly |
| 3 | VCC | Supply input - powers internal circuitry and sets detection domain; accepts 1.0V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA enables >10-year battery life in always-on monitoring applications |
| Precision threshold | 4.63V ±2.5% eliminates need for external trimming or calibration |
| Transient immunity | Rejects <140µs VCC glitches - prevents spurious resets during switching noise |
| No external components | Reduces bill-of-materials cost and layout area vs. discrete resistor-divider solutions |
| SC70-3 footprint | 2.0mm × 2.1mm size fits into sub-5mm² PCB real estate constraints |
Applications
| Battery-Powered Medical Sensor | Li+ Charger Supervision |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by CR2032 coin cell, requiring reliable low-battery warning before shutdown. IC Role / Device Role / Timing Role: Voltage detector asserting MCU reset when battery drops below 4.63V - triggers graceful data save and sleep mode entry. Use Value: 500nA quiescent current extends operational life beyond 3 years; ±2.5% threshold accuracy ensures consistent low-voltage warning across temperature. |
Use Scenario: Monitoring output of 5V DC/DC converter feeding USB-C PD sink circuitry. IC Role / Device Role / Timing Role: Active-low reset generator that holds system in reset until regulated 5V rail stabilizes above 4.63V after power-up. Use Value: Push-pull output drives reset line without external pull-up; 9.5µs propagation delay enables fast, deterministic power sequencing. |
| Industrial Wireless Node | Portable Diagnostic Equipment |
|
Use Scenario: LoRaWAN endpoint using alkaline AA batteries, where undervoltage must halt radio transmission to prevent data corruption. IC Role / Device Role / Timing Role: Brownout detector interfacing directly to microcontroller's NMI input to force immediate firmware intervention. Use Value: Valid operation down to 1V VCC allows detection even during final battery discharge phase; SC70-3 package saves space on compact RF module PCB. |
Use Scenario: Handheld ultrasound probe with integrated rechargeable battery pack and 5V auxiliary rail. IC Role / Device Role / Timing Role: Dual-rail supervisor - one MAX6378XR46-T monitors main 5V supply, another monitors battery protection circuit voltage. Use Value: Factory-trimmed 4.63V threshold matches common 5V LDO dropout specifications; hysteresis prevents oscillation during marginal supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB33DBZR | 3.3V threshold, SOT23-3, 350nA ICC, open-drain output | Requires external pull-up; lower threshold unsuitable for 5V rail monitoring | Select only if 3.3V detection and open-drain interface are required |
| TPS3808G33DBVR | 3.3V threshold, SOT23-6, 800nA ICC, adjustable delay, push-pull | Larger package, higher current, different pinout - not drop-in compatible | Choose when programmable reset timeout is needed, not for direct replacement |
Compared with TLV803EB33DBZR and TPS3808G33DBVR, the MAX6378XR46-T uniquely combines 4.63V precision threshold, 500nA supply current, SC70-3 footprint, and push-pull output - making it the only option meeting all four requirements for compact 5V rail supervision.
Availability
MAX6378XR46-T is available at Aetrix Electronics and suitable for portable medical sensors, Li+ charger supervision, and industrial wireless nodes requiring stable component supply with guaranteed long-term availability.
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 and mixed-signal ICs for power management, sensing, and interface applications - emphasizing reliability, integration, and low-power operation.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems, delivering factory-trimmed thresholds and nanoscale quiescent current without external components.
FAQ
What is the exact reset threshold voltage of MAX6378XR46-T?
The MAX6378XR46-T has a nominal reset threshold of 4.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +85°C). This value is factory-trimmed and specified in Table 1 of the datasheet under suffix "R46". The MAX6378XR46-T uses this precise threshold to supervise 5V power rails where margin above 4.63V ensures stable operation before reset assertion.
Does MAX6378XR46-T require external components to operate?
No, the MAX6378XR46-T requires no external components - its precision bandgap reference, comparator, and threshold-setting resistors are fully integrated and factory-trimmed. Unlike discrete solutions, the MAX6378XR46-T eliminates resistor dividers, capacitors, and calibration steps, reducing design complexity and PCB area while maintaining ±2.5% threshold accuracy across temperature.
What package type and dimensions does MAX6378XR46-T use?
The MAX6378XR46-T is supplied in a 3-pin SC70-3 package measuring 2.0mm × 2.1mm × 0.9mm. This ultra-small outline matches the pinout of the SOT23-3 variant but offers superior board-area efficiency. The SC70-3 footprint is explicitly confirmed in the Pin Configuration diagram and Ordering Information table for MAX6378XRxx-T variants.
How does MAX6378XR46-T handle power-supply transients?
The MAX6378XR46-T incorporates internal transient immunity circuitry that ignores fast negative-going VCC glitches. Per the Typical Operating Characteristics graph "Maximum Transient Duration vs. Threshold Overdrive", it suppresses output pulses for transients ≤140µs at 10mV overdrive - preventing false resets during switching regulator noise or ESD-induced dips on the monitored 5V rail.
Is MAX6378XR46-T compatible with 1.8V or 3.3V logic interfaces?
Yes - although the MAX6378XR46-T operates from 1.0V to 5.5V VCC and asserts an active-low push-pull output, its OUT pin is compatible with 1.8V, 3.3V, and 5V logic families. When VCC ≥ 2.1V, VOL is guaranteed ≤0.4V (ISINK = 100µA), ensuring solid logic-low levels across all common I/O standards without level-shifting circuitry.
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:
- Obsolete
- 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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