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Analog Devices Inc./Maxim Integrated MAX6378XR37
- Part No.:
- MAX6378XR37
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6378XR37.pdf
- Description:
- IC SUPERVISOR UL LO PWR VOLT DET
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
MAX6378XR37 from Maxim Integrated is an ultra-low-power, active-low voltage detector IC with factory-trimmed 3.700V threshold, push-pull output, ±2.5% accuracy over temperature, 500nA supply current, and SC70-3 package - used for precision power-supply monitoring in battery-backed microcontroller reset circuits.
For engineers reviewing the MAX6378XR37 datasheet, MAX6378XR37 pinout, MAX6378XR37 application, or MAX6378XR37 equivalent, this page delivers verified threshold accuracy, transient immunity specs, output logic behavior, package dimensions, and direct alternatives for portable and industrial power-monitoring designs.
Technical Context
The MAX6378XR37 implements a precision bandgap reference and comparator architecture with internally trimmed resistors to set its 3.700V trip point. It asserts an active-low push-pull output when VCC falls below VTH, maintaining valid logic state down to 1V supply.
Designed for immunity to fast transients, it tolerates negative-going VCC glitches up to 140µs at 30mV overdrive (per Typical Operating Characteristics), and operates across -40°C to +85°C with 40ppm/°C threshold tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.700V nominal, ±2.5% over -40°C to +85°C - ensures reliable reset assertion across industrial temperature range |
| Supply Current | 500nA typical at +25°C - enables multi-year battery life in coin-cell–powered devices |
| Output Type | Active-low push-pull - drives logic inputs directly without external pull-up resistor |
| Propagation Delay | 9.5µs max (falling edge) - supports fast system response to brownout conditions |
| VCC Operating Range | 1.2V to 5.5V - functions during deep brownout and full supply operation |
| Threshold Hysteresis | 100mV - prevents output oscillation near trip point during slow supply ramps |
| Tempco | 40ppm/°C - limits threshold drift to <±15mV over full temperature range |
Pinout & Package
MAX6378XR37 is housed in a 3-pin SC70-3 package (2.0mm × 1.25mm × 0.95mm body, 0.65mm pitch), optimized for space-constrained portable PCB layouts.
| 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 1.6mA or sources 500µA; asserts logic low during undervoltage condition |
| 3 | VCC | Supply input - powers internal circuitry and defines monitored rail; operates from 1.2V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year shelf life in lithium primary battery applications |
| Factory-trimmed threshold | 3.700V ±2.5% eliminates calibration effort and external resistor networks |
| Push-pull active-low output | Direct interface to µP reset inputs without pull-up resistor or level-shifting |
| Transient immunity | Rejects VCC glitches ≤140µs (at 30mV under VTH), preventing false resets |
| Wide VCC operating range | 1.2V to 5.5V supports operation during deep brownout and across multiple supply domains |
Applications
| Microcontroller Reset Supervision | Battery Voltage Monitoring |
|---|---|
Use Scenario: Monitors main 3.3V or 3.6V supply rail feeding an ARM Cortex-M0+ MCU in a wireless sensor node. IC Role / Device Role / Timing Role: Voltage detector providing clean, glitch-immune reset signal to nRST pin during brownout. Use Value: Prevents firmware corruption by ensuring CPU remains held in reset until VCC exceeds 3.700V with 100mV hysteresis. |
Use Scenario: Tracks Li-ion cell voltage in a portable medical thermometer to trigger low-battery warning before shutdown. IC Role / Device Role / Timing Role: Precision threshold detector asserting low signal when cell drops below 3.700V (≈15% remaining capacity). Use Value: Enables accurate end-of-life prediction using factory-calibrated trip point, eliminating ADC polling overhead. |
| Power Sequencing Control | Industrial PLC I/O Module Monitoring |
Use Scenario: Validates stable 3.3V auxiliary rail before enabling 1.2V core regulator in a dual-rail FPGA power system. IC Role / Device Role / Timing Role: Undervoltage lockout (UVLO) element initiating controlled power-up sequence via enable chain. Use Value: Ensures downstream regulators only activate after upstream rail meets 3.700V minimum, preventing latch-up or sequencing faults. |
Use Scenario: Monitors 24V-to-3.3V DC/DC converter output in an industrial I/O module exposed to EMI-rich factory environments. IC Role / Device Role / Timing Role: Immune voltage supervisor detecting sustained undervoltage events amid conducted transients. Use Value: Delivers robust reset signaling with 140µs glitch rejection, reducing spurious reboots in noisy 24V systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB37DBZR | 3.7V threshold, open-drain output, 350nA ICC, SOT23-3 package | Requires external pull-up; lower supply current but no push-pull drive capability | Choose when system uses shared reset bus or needs lowest possible ICC |
| APX803S-37SA-7 | 3.7V threshold, push-pull active-low, 800nA ICC, SOT23-3 package | Higher supply current; wider operating range (0.9V to 6.0V); same pinout as MAX6378XR37 in SOT23 | Choose when SC70 footprint is unavailable and SOT23 layout exists |
Compared with TLV803EB37DBZR and APX803S-37SA-7, the MAX6378XR37 uniquely combines SC70-3 size, 500nA ICC, and push-pull drive - making it optimal for ultra-compact, battery-critical designs where board area and reset reliability are co-constrained.
Availability
MAX6378XR37 is available at Aetrix Electronics and suitable for microcontroller reset supervision, battery voltage monitoring, and industrial power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for MAX6378XR37 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 computing applications.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in portable and battery-operated systems, prioritizing nanoscale current draw, factory-trimmed accuracy, and transient-hardened operation.
FAQ
What is the exact reset threshold voltage of MAX6378XR37?
The MAX6378XR37 has a factory-trimmed nominal reset threshold of 3.700V, with guaranteed tolerance of ±2.5% over the full -40°C to +85°C operating temperature range. At +25°C, the typical threshold is 3.700V, and the min/max bounds are 3.607V and 3.792V respectively per Table 1 in the datasheet.
Does MAX6378XR37 require an external pull-up resistor on its output?
No, MAX6378XR37 does not require an external pull-up resistor because it features an active-low push-pull output stage. The OUT pin can both sink up to 1.6mA and source up to 500µA, allowing direct connection to microcontroller reset inputs without additional components.
What package type is used for MAX6378XR37, and what are its dimensions?
MAX6378XR37 is supplied in the SC70-3 package: a 3-pin surface-mount outline measuring 2.0mm × 1.25mm × 0.95mm with 0.65mm lead pitch. This compact footprint is ideal for space-constrained portable PCBs and matches the pin configuration shown in the MAX6375–MAX6380 datasheet Figure "SC70-3".
How does MAX6378XR37 handle short voltage transients on the VCC line?
MAX6378XR37 incorporates built-in transient immunity: it ignores negative-going VCC glitches shorter than 140µs when the overdrive (VTH – VCC) is 30mV, per the "Maximum Transient Duration vs. Threshold Overdrive" graph. This prevents false resets caused by switching noise or EMI-induced dips.
Is MAX6378XR37 compatible with 1.8V logic systems?
Yes, MAX6378XR37 is compatible with 1.8V logic systems. Its push-pull output guarantees VOL ≤0.4V at ISINK = 1.6mA and VCC ≥3.2V, and VOH ≥0.8×VCC when asserted high - meaning it cleanly drives 1.8V CMOS inputs when powered from ≥2.1V supplies, and maintains valid logic states down to VCC = 1.2V.
MAX6378XR37 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Voltage Detector
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.7V
- 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
MAX6378XR37 FAQ
1.How can I place an order for MAX6378XR37 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6378XR37 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 MAX6378XR37 reliable?
The price and inventory of MAX6378XR37 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6378XR37 is usually 5 days.
3.What payment methods are accepted for MAX6378XR37?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6378XR37 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6378XR37?
MAX6378XR37 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6378XR37 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 MAX6378XR37?
For technical support, including MAX6378XR37 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6378XR37 requirements.
6.How does Aetrix verify that MAX6378XR37 is sourced from the original manufacturer or authorized distributors?
All MAX6378XR37 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 MAX6378XR37 meets industry standards.
7.What is the process for return or replacement of MAX6378XR37?
All MAX6378XR37 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6378XR37, 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 MAX6378XR37 part is unused and in its original packaging.
Return procedure for MAX6378XR37:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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