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Analog Devices Inc./Maxim Integrated MAX6377XR29-T
- Part No.:
- MAX6377XR29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6377XR29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,154
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Product details
Overview
MAX6377XR29-T from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for battery monitoring in portable systems. It features a factory-trimmed 2.93V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Its SC70-3 package and transient-immune design make it suitable for Li+-powered microcontroller reset supervision.
For engineers reviewing the MAX6377XR29-T datasheet, MAX6377XR29-T pinout, MAX6377XR29-T application, or MAX6377XR29-T equivalent, key selection criteria include its 2.93V trip point, open-drain output with 100µA leakage, ±2.5% threshold accuracy, immunity to sub-200µs VCC glitches, and compatibility with 1.2V–5.5V logic pull-ups.
Technical Context
The MAX6377XR29-T implements a precision bandgap reference and comparator with internally trimmed resistors to set a fixed 2.93V detection threshold. It asserts an active-low signal on OUT when VCC falls below VTH, with hysteresis of 10mV to prevent chatter during slow voltage decay.
Its open-drain output requires an external pull-up and supports sink currents up to 1.6mA while maintaining VOL ≤0.3V. The device ignores fast negative-going transients on VCC-up to 200µs wide when overdriven by 100mV-ensuring robust reset generation in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93V (factory-trimmed, ±2.5% over -40°C to +85°C) |
| Supply Current | 500nA at +25°C - enables multi-year battery life in coin-cell applications |
| Output Type | Active-low open-drain - allows flexible logic-level interfacing via external pull-up |
| VCC Operating Range | 1.2V to 5.5V - supports operation during brownout and across diverse supply rails |
| Propagation Delay | 6.3µs (typical) - ensures timely reset assertion without excessive latency |
| Threshold Hysteresis | 10mV - prevents oscillation during slow VCC recovery near trip point |
| Output Leakage | 0.1µA max at VCC = 5.5V - minimizes power loss in high-impedance pull-up configurations |
Pinout & Package
MAX6377XR29-T is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 is GND, Pin 2 is OUT (open-drain), 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 | Open-drain active-low output - sinks current when VCC < 2.93V; requires external pull-up resistor to logic rail |
| 3 | VCC | Supply input - powers internal circuitry; valid from 1.2V to 5.5V; also monitored for threshold violation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA enables >10-year shelf life in CR2032-powered IoT sensors |
| Precision factory-trimmed threshold | 2.93V ±2.5% eliminates need for external resistor dividers or calibration |
| Transient immunity | Rejects VCC glitches ≤200µs wide - prevents false resets in switching regulator environments |
| Wide VCC operating range | 1.2V–5.5V supports direct connection to Li+ cells, LDO outputs, or MCU I/O rails |
| SC70-3 footprint | 2.0mm × 2.1mm area saves >40% board space vs. SOT23-3 in dense wearable layouts |
Applications
| Battery-Powered Microcontroller Reset | Li+ Cell Undervoltage Protection |
|---|---|
Use Scenario: Supervising 3.3V MCU power rail powered by a single Li+ cell with declining voltage profile. IC Role / Device Role / Timing Role: Voltage detector providing active-low reset signal to MCU's RESET pin upon VCC drop below 2.93V. Use Value: Prevents MCU lockup or data corruption when battery voltage falls below safe operating level, using only 500nA overhead. |
Use Scenario: Monitoring bare Li+ cell (3.0V–4.2V) to trigger disconnect before deep discharge. IC Role / Device Role / Timing Role: Threshold comparator enabling load switch control via open-drain output. Use Value: Delivers precise 2.93V cutoff with ±2.5% accuracy across temperature - avoids premature shutdown or cell damage. |
| Low-Power Sensor Node Wake-Up | Industrial Data Logger Brownout Detection |
Use Scenario: Waking ultra-low-power sensor node from sleep when main supply recovers above threshold. IC Role / Device Role / Timing Role: Reset supervisor asserting wake signal to microcontroller's interrupt-capable GPIO. Use Value: 6.3µs propagation delay ensures rapid response; 500nA current draw preserves energy budget during extended sleep cycles. |
Use Scenario: Detecting AC/DC adapter failure in industrial logger with backup supercapacitor hold-up. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown sequence before VCC collapses. Use Value: Immunity to 200µs transients prevents spurious shutdown during relay switching or EMI events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EC29DBZR | 2.93V threshold, push-pull output, 350nA ICC, SOT23-3 | Requires no pull-up; less flexible for mixed-voltage systems | Prefer when driving CMOS inputs directly and board space permits SOT23-3 |
| APX803S-29SA-7 | 2.93V threshold, open-drain, 800nA ICC, SOT23-3 | Higher supply current; wider tempco (±3.5%) | Acceptable where 500nA is not critical and SOT23-3 is preferred over SC70-3 |
Compared with TLV809EC29DBZR and APX803S-29SA-7, the MAX6377XR29-T uniquely combines SC70-3 size, 500nA current, and open-drain flexibility - making it optimal for miniaturized, multi-rail battery systems requiring minimal quiescent power and configurable logic interfacing.
Availability
MAX6377XR29-T is available at Aetrix Electronics and suitable for portable medical devices, wireless sensor nodes, and handheld test equipment requiring stable component supply with long-term lifecycle support.
Supply support for MAX6377XR29-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, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage monitoring in battery-critical systems - delivering factory-trimmed thresholds, nanoscale current consumption, and transient-hardened operation in miniature packages.
FAQ
What is the exact reset threshold voltage of the MAX6377XR29-T?
The MAX6377XR29-T has a factory-trimmed nominal reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 1 of the datasheet and applies specifically to the R29 suffix variant, not the broader MAX6377 family.
Does the MAX6377XR29-T require an external pull-up resistor on its OUT pin?
Yes, the MAX6377XR29-T features an open-drain output and requires an external pull-up resistor connected between OUT and a logic supply (up to 5.5V). Typical values range from 10kΩ to 100kΩ depending on rise-time requirements and bus loading - the device itself sinks up to 1.6mA when asserted.
Can the MAX6377XR29-T operate reliably below 2.0V VCC?
Yes, the MAX6377XR29-T is fully specified to operate down to VCC = 1.2V and guarantees correct output logic state (active-low when VCC < 2.93V) down to 1.0V. This enables use in deep-brownout scenarios such as end-of-life Li+ cells or capacitor-backed systems.
What package type does the MAX6377XR29-T use, and what are its dimensions?
The MAX6377XR29-T uses the SC70-3 package: a 3-pin surface-mount outline measuring 2.0mm × 2.1mm × 0.95mm (length × width × height). Its top marking is "ADJ", and it is supplied in tape-and-reel format only per the ordering information.
How does the MAX6377XR29-T handle short voltage transients on the VCC line?
The MAX6377XR29-T rejects negative-going VCC transients up to 200µs in duration when overdriven by 100mV below threshold - as shown in Figure 4 of the datasheet. This built-in immunity prevents false resets during switching noise or load-dump events without requiring external RC filtering.
MAX6377XR29-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:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6377XR29-T FAQ
1.How can I place an order for MAX6377XR29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6377XR29-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 MAX6377XR29-T reliable?
The price and inventory of MAX6377XR29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6377XR29-T is usually 5 days.
3.What payment methods are accepted for MAX6377XR29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6377XR29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6377XR29-T?
MAX6377XR29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6377XR29-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 MAX6377XR29-T?
For technical support, including MAX6377XR29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6377XR29-T requirements.
6.How does Aetrix verify that MAX6377XR29-T is sourced from the original manufacturer or authorized distributors?
All MAX6377XR29-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 MAX6377XR29-T meets industry standards.
7.What is the process for return or replacement of MAX6377XR29-T?
All MAX6377XR29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6377XR29-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 MAX6377XR29-T part is unused and in its original packaging.
Return procedure for MAX6377XR29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6377XR29-T Tags
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MIC826SYMT-TR
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APX803L20-29SA-7
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