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Analog Devices Inc./Maxim Integrated MAX6388XS29D1-T
- Part No.:
- MAX6388XS29D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS29D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
MAX6388XS29D1-T from Maxim Integrated is a low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V VCC reset threshold, and 1ms minimum reset timeout period. It monitors single supply voltage in battery-powered or space-constrained embedded systems and guarantees valid reset state down to VCC = 1V. Designed for dual-voltage systems requiring auxiliary voltage monitoring, it features RESET IN input compatible with +1.27V internal reference.
For engineers reviewing the MAX6388XS29D1-T datasheet, MAX6388XS29D1-T pinout, MAX6388XS29D1-T application, or MAX6388XS29D1-T equivalent, key selection criteria include its 4-pin SC70 package, ±2.5% reset threshold accuracy over –40°C to +125°C, 3μA supply current at 1.8V, auxiliary voltage monitoring capability, and compatibility with manual reset–equipped variants via shared footprint.
Technical Context
The MAX6388XS29D1-T implements a precision bandgap-based reset comparator with 60ppm/°C tempco and negative-going VCC transient immunity up to 35µs at 100mV overdrive. Its auxiliary RESET IN input compares external voltage against a stable +1.27V reference, enabling user-defined secondary reset thresholds via resistor divider.
This device belongs to the MAX6387–MAX6389 variant group featuring open-drain–capable reset outputs (though MAX6388 uses push-pull active-high), integrated RESET IN comparator, and operation across 1.0V to 5.5V VCC range. It guarantees correct reset logic state down to VCC = 1V and supports brownout detection during power-up/down sequences without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (nominal), ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive and industrial temperature ranges |
| Reset Timeout Period | 1ms (min) - provides fast system recovery after brief supply dips while avoiding spurious resets |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and wearables |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup resistor and drives high-impedance μP reset inputs directly |
| Auxiliary Input | RESET IN with +1.27V reference - allows monitoring of second supply rail (e.g., I/O voltage) using external resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.2V, 1.8V, 2.5V, 3.3V, and 5V systems |
| Reset Comparator Tempco | 60ppm/°C - minimizes threshold drift over temperature, critical for precision power sequencing |
Pinout & Package
MAX6388XS29D1-T is housed in a RoHS-compliant 4-pin SC70 package (outline 21-0098, land pattern 90-0187), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor - powers internal circuitry and triggers reset when falling below 2.93V |
| 2 | RESET | Active-high push-pull output - asserts high during reset condition and deasserts low after timeout; drives μP reset pin directly |
| 3 | GND | Analog and digital ground reference - must be connected to system ground plane for accurate threshold sensing |
| 4 | RESET IN | Auxiliary voltage monitor input - compared to internal +1.27V reference; enables dual-rail supervision without additional ICs |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.5% tolerance over full temperature range - eliminates need for external calibration or trimming resistors |
| RESET IN comparator | +1.27V internal reference with <50nA input leakage - enables accurate secondary voltage monitoring using high-value resistor dividers |
| Negative-going VCC transient immunity | Withstands 35µs glitches at 100mV overdrive - prevents false resets in electrically noisy environments like motor control or switching power supplies |
| Low-voltage operation guarantee | Valid RESET output down to VCC = 1V - ensures deterministic behavior during deep brownout conditions before complete power loss |
| Ultra-low quiescent current | 3μA at 1.8V - extends battery life in always-on portable instrumentation and remote sensor nodes |
Applications
| Power Monitoring in Portable Medical Devices | Dual-Rail Supervision in Industrial PLC Modules |
|---|---|
Use Scenario: Continuous glucose monitors and handheld ultrasound units require reliable power-up sequencing and brownout protection under varying battery discharge profiles. IC Role / Device Role / Timing Role: MAX6388XS29D1-T acts as primary VCC supervisor and secondary I/O voltage monitor via RESET IN, asserting active-high reset to ARM Cortex-M microcontroller during undervoltage events. Use Value: 2.93V threshold aligns with 3.0V Li-ion cutoff; 1ms timeout enables rapid recovery from transient dips without disrupting real-time signal acquisition. | Use Scenario: Programmable logic controllers use separate 5V logic and 24V I/O rails; both must be validated before firmware execution. IC Role / Device Role / Timing Role: MAX6388XS29D1-T monitors main 5V supply while RESET IN tracks scaled 24V rail via 18.7kΩ/10kΩ divider, triggering unified reset if either fails. Use Value: Eliminates need for two discrete supervisors; ±2.5% threshold accuracy ensures consistent trip points across –40°C to +85°C operating range. |
| Battery-Powered Smart Sensors | Automotive Body Control Modules |
Use Scenario: Wireless environmental sensors powered by CR2032 coin cells operate intermittently and must survive deep discharge cycles. IC Role / Device Role / Timing Role: MAX6388XS29D1-T supervises 3.0V regulated output and detects backup rail collapse via RESET IN, holding MCU in reset until stable power returns. Use Value: 3μA supply current extends shelf life beyond 5 years; 1.0V operational floor prevents latch-up during cold cranking scenarios. | Use Scenario: BCMs require AEC-Q100 qualified supervision of 5V CAN transceiver supply and 12V lamp driver rail. IC Role / Device Role / Timing Role: MAX6388XS29D1-T (with /V suffix option) monitors 5V domain while RESET IN validates 12V via 49.9kΩ/10kΩ divider, asserting reset on first fault. Use Value: Factory-trimmed 2.93V threshold matches automotive 3.3V LDO tolerance; 4-pin SC70 footprint simplifies layout in constrained ECU housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387XS29D1-T | Open-drain active-low reset output; identical VCC threshold, timeout, RESET IN functionality | Requires external pullup resistor; suited for wired-OR reset buses or level-shifting interfaces | Select when system architecture mandates active-low or open-drain signaling, e.g., legacy μP reset inputs or multi-source reset arbitration |
| TLV803EB29DBZR | 2.93V threshold, 1ms timeout, SOT-23-3 package; no RESET IN input; ±2% accuracy over –40°C to +125°C | Single-supply only; lacks auxiliary monitoring; lower quiescent current (0.5μA) | Choose for cost-sensitive, space-constrained designs where dual-rail supervision is unnecessary and ultra-low power dominates |
Compared with MAX6387XS29D1-T, MAX6388XS29D1-T offers direct-drive active-high reset without pullup, simplifying BOM and layout; versus TLV803EB29DBZR, it adds RESET IN capability at the cost of one extra pin and higher supply current - a trade-off justified in dual-voltage systems requiring fault isolation.
Availability
MAX6388XS29D1-T is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC modules, battery-powered smart sensors, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS29D1-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 computing applications.
The MAX6381–MAX6390 product line delivers low-power, high-accuracy μP supervisory circuits optimized for battery-operated equipment and systems requiring dual-voltage monitoring with minimal board area.
FAQ
What is the exact reset threshold voltage of MAX6388XS29D1-T and how stable is it over temperature?
The MAX6388XS29D1-T has a nominal VCC reset threshold of 2.93V, with guaranteed tolerance of ±2.5% over the full –40°C to +125°C operating range. Its reset comparator exhibits 60ppm/°C tempco, meaning threshold drift is limited to approximately ±15mV across the entire temperature span - sufficient for robust brownout detection in automotive and industrial environments where supply rails vary with thermal load.
Does MAX6388XS29D1-T support monitoring of a second voltage rail, and how is it implemented?
Yes, MAX6388XS29D1-T supports auxiliary voltage monitoring via its dedicated RESET IN pin, which compares an external voltage against an internal +1.27V reference. To supervise a second rail (e.g., 5V or 12V), connect a resistor divider between that rail and ground, with the midpoint fed to RESET IN. The MAX6388XS29D1-T asserts reset if either VCC falls below 2.93V or the divided voltage drops below +1.27V - enabling coordinated reset for multi-rail systems without additional ICs.
What is the function of the RESET output on MAX6388XS29D1-T, and what are its drive capabilities?
The RESET output of MAX6388XS29D1-T is an active-high push-pull driver, meaning it actively drives high during reset assertion and low during normal operation. It can sink 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V) and source 800µA at VCC ≥ 4.5V (VOH ≥ 0.8×VCC), allowing direct connection to standard CMOS μP reset inputs without external components. This differs from open-drain variants that require pullup resistors.
Can MAX6388XS29D1-T operate reliably at very low supply voltages, and what is its minimum functional VCC?
Yes, MAX6388XS29D1-T guarantees correct RESET output logic state down to VCC = 1.0V, ensuring deterministic behavior during deep brownout conditions before complete power loss. While its specified operating range is 1.0V to 5.5V, the internal bandgap reference and comparator remain functional at 1.0V, making it suitable for applications like energy-harvesting systems or battery-powered devices nearing end-of-life where supply may sag below 1.8V.
What package type and dimensions does MAX6388XS29D1-T use, and is it RoHS-compliant?
MAX6388XS29D1-T is supplied in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline 21-0098), measuring 2.0mm × 2.1mm × 0.95mm with 0.65mm pin pitch. This compact footprint supports high-density PCB layouts in space-constrained applications such as wearable electronics and miniaturized industrial sensors, and its thermal resistance (θJA = 322.6°C/W on multilayer board) ensures stable operation under typical ambient conditions.
MAX6388XS29D1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.93V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS29D1-T FAQ
1.How can I place an order for MAX6388XS29D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS29D1-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 MAX6388XS29D1-T reliable?
The price and inventory of MAX6388XS29D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS29D1-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS29D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS29D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS29D1-T?
MAX6388XS29D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS29D1-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 MAX6388XS29D1-T?
For technical support, including MAX6388XS29D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS29D1-T requirements.
6.How does Aetrix verify that MAX6388XS29D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS29D1-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 MAX6388XS29D1-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS29D1-T?
All MAX6388XS29D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS29D1-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 MAX6388XS29D1-T part is unused and in its original packaging.
Return procedure for MAX6388XS29D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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