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Analog Devices Inc./Maxim Integrated MAX6388XS29D4-T
- Part No.:
- MAX6388XS29D4-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6388XS29D4-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
MAX6388XS29D4-T from Maxim Integrated is a low-power, dual-voltage microprocessor supervisory circuit with active-high push-pull reset output, factory-set 2.93V VCC reset threshold (±2.5% over –40°C to +125°C), 1120ms minimum VCC reset timeout, and auxiliary RESET IN input for monitoring a second voltage source. It consumes only 3μA at +1.8V and guarantees valid reset state down to VCC = 1V - used in battery-powered instrumentation and dual-rail embedded systems requiring reliable power-on reset and brownout detection.
For engineers reviewing the MAX6388XS29D4-T datasheet, MAX6388XS29D4-T pinout, MAX6388XS29D4-T application, or MAX6388XS29D4-T equivalent, key selection considerations include its 4-pin SC70 package, +1.27V internal reference for RESET IN comparator, ±60ppm/°C reset threshold tempco, and immunity to negative-going VCC transients up to 35µs at 100mV overdrive.
Technical Context
The MAX6388XS29D4-T integrates two independent voltage monitors: one fixed VCC comparator (2.93V threshold) and one auxiliary RESET IN comparator referenced to an internal +1.27V bandgap. Reset asserts when either input falls below its respective threshold, and remains asserted for 1120ms after recovery. Its push-pull active-high RESET output drives high during fault conditions and deasserts low after timeout - eliminating need for external pullup.
It features a dedicated RESET IN pin with 50nA max leakage and 4.5µs propagation delay, enabling precise secondary supply monitoring via external resistor divider. The device operates across full industrial temperature range (–40°C to +125°C) and supports stable reset assertion even under fast VCC transients, with guaranteed functionality down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (nominal), ±2.5% accuracy over –40°C to +125°C - ensures consistent brownout detection across automotive/industrial environments |
| RESET Timeout Period | 1120ms (min) - provides sufficient hold time for slow-ramping processors or FPGA configuration circuits |
| RESET Output Type | Active-high push-pull - eliminates external pullup resistor and reduces BOM count vs. open-drain alternatives |
| Supply Current | 3μA at +1.8V - enables multi-year operation in coin-cell–powered IoT sensors and portable diagnostics |
| RESET IN Reference Voltage | +1.27V (±2.5% over temp) - allows accurate secondary supply monitoring using standard resistor ratios |
| Operating Voltage Range | +1.0V to +5.5V - supports direct interface with 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails without level shifting |
| Reset Propagation Delay | 35µs (VCC falling), 4.5µs (RESET IN falling) - ensures timely response to fast supply dips while rejecting sub-µs noise |
Pinout & Package
MAX6388XS29D4-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. This compact footprint supports high-density PCB layouts in space-constrained portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail - powers internal circuitry and triggers reset when below 2.93V |
| 2 | RESET | Active-high push-pull output - drives high during reset assertion; sinks current when deasserted; no external pullup required |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane for stable comparator operation |
| 4 | RESET IN | Auxiliary voltage monitor input - compared against internal +1.27V reference; accepts divided-down voltages for dual-supply supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of main VCC (2.93V) and secondary supply via RESET IN - enables robust dual-rail systems without extra ICs |
| Factory-trimmed precision threshold | ±2.5% tolerance over full temperature range - eliminates need for external calibration in production test |
| Low quiescent current | 3μA at 1.8V - extends battery life in always-on edge nodes and handheld test equipment |
| Negative transient immunity | Rejects VCC glitches ≤35µs at 100mV overdrive - prevents spurious resets in noisy automotive or industrial power domains |
| Valid reset down to VCC = 1V | Guaranteed logic-level integrity through deep brownout - ensures safe processor halt before memory corruption occurs |
Applications
| Battery-Powered Instrumentation | Dual-Voltage Embedded Systems |
|---|---|
Use Scenario: Handheld multimeter with separate 3.3V analog front-end and 1.2V MCU core, powered by single Li-ion cell. IC Role / Device Role / Timing Role: Monitors both rails independently; asserts reset if either drops below threshold during discharge or load surge. Use Value: Prevents erratic ADC readings or corrupted firmware execution during partial battery depletion - no software intervention needed. | Use Scenario: Industrial PLC I/O module with isolated 24V field-side supply and 3.3V logic-side supply. IC Role / Device Role / Timing Role: Uses VCC pin for 3.3V rail supervision and RESET IN for scaled 24V rail (via resistor divider), triggering unified reset on either failure. Use Value: Eliminates need for two discrete supervisors - reduces component count, layout area, and qualification effort. |
| Automotive Body Control Module | Medical Diagnostic Sensor Node |
Use Scenario: BCM subassembly operating from 5V regulated bus, requiring AEC-Q100 compliance and immunity to load-dump transients. IC Role / Device Role / Timing Role: Provides power-on reset and brownout protection; RESET IN monitors backup 3.3V RTC supply. Use Value: Ensures deterministic boot sequence after ignition cycle; maintains clock integrity during main supply interruption. | Use Scenario: Portable ECG sensor with ultra-low-power 1.8V MCU and 2.5V analog signal chain, powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Supervises both supplies and holds reset until stable - critical for artifact-free acquisition startup. Use Value: Guarantees clean initialization before first sample capture, avoiding false arrhythmia detection due to unstable power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6388LT29D4-T | Same electrical specs but in 6-pin µDFN (L611+1) instead of 4-pin SC70 - larger footprint, better thermal dissipation | Suitable for thermally demanding environments where SC70 self-heating may affect long-term threshold stability | Select when board layout allows larger package and thermal margin is prioritized over size |
| TLV809E29DBZR | Single-supply-only (no RESET IN), 2.93V threshold, 1400ms timeout, SOT-23-3 package - lacks auxiliary monitoring capability | Applicable only where dual-voltage supervision is unnecessary; lower cost but functionally reduced | Choose only for cost-sensitive, single-rail designs where RESET IN is unused |
Compared with MAX6388XS29D4-T, the MAX6388LT29D4-T offers identical supervision functionality in a thermally superior package, while TLV809E29DBZR provides basic reset capability at lower cost but omits the critical dual-monitoring feature required for complex power architectures.
Availability
MAX6388XS29D4-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, dual-voltage embedded systems, automotive body control modules, and medical diagnostic sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for MAX6388XS29D4-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 industrial, automotive, and computing applications - emphasizing reliability, low power, and integration.
The MAX6381–MAX6390 family delivers highly accurate, ultra-low-power μP reset supervision with flexible threshold, timeout, and monitoring options - engineered specifically for mission-critical embedded systems where power integrity directly impacts functional safety.
FAQ
What is the exact reset threshold voltage of MAX6388XS29D4-T and how stable is it over temperature?
The MAX6388XS29D4-T has a factory-set nominal VCC reset threshold of 2.93V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. Its reset threshold tempco is ±60ppm/°C, meaning drift is tightly controlled - for example, at +125°C, the threshold remains within 2.85V to 3.00V. This stability is confirmed in the Electrical Characteristics table and Typical Operating Characteristics plots (toc04) of the official datasheet.
Does MAX6388XS29D4-T support monitoring of a second voltage, and how is it implemented?
Yes, MAX6388XS29D4-T supports dual-voltage supervision via its dedicated RESET IN pin, which compares an external voltage against an internal +1.27V reference. To monitor a second supply (e.g., 5V or 12V), connect it to RESET IN through a resistor divider - the threshold is set using R1 = R2 × ((VINTH/1.27V) – 1). Input leakage is ≤50nA, enabling use of high-value resistors without accuracy loss. This function is explicitly documented in the Pin Description and Applications Information sections.
What is the reset timeout period for MAX6388XS29D4-T, and is it guaranteed minimum or typical?
The MAX6388XS29D4-T has a guaranteed minimum reset timeout period of 1120ms for VCC-related resets, as indicated by the "D4" suffix in its part number. This value is specified in the Reset Timeout Delay table and Electrical Characteristics section (tRP, D4 row) - not a typical value. The actual timeout may extend up to 2240ms depending on process and temperature, but the 1120ms minimum ensures sufficient hold time for all compliant microprocessors and FPGAs during power-up sequencing.
Can MAX6388XS29D4-T operate reliably at very low supply voltages, and what is its functional lower limit?
Yes, MAX6388XS29D4-T is guaranteed to operate correctly down to VCC = 1.0V, with its RESET output maintaining valid logic levels throughout this range. The datasheet explicitly states "Reset Output State Guaranteed Valid Down to VCC = 1V", and Electrical Characteristics confirm VOL ≤ 0.3V and VOH ≥ 0.8×VCC at VCC = 1.0V with appropriate load conditions. This enables safe shutdown detection in deeply brownout scenarios before memory corruption occurs.
What package type and footprint does MAX6388XS29D4-T use, and are land patterns available?
MAX6388XS29D4-T uses a 4-pin SC70 package (outline number 21-0098, package code X4+1), with dimensions 2.0mm × 2.1mm × 0.95mm. Its land pattern number is 90-0187, and official footprint drawings are published on maximintegrated.com/packages. The "+T" suffix confirms lead(Pb)-free/RoHS compliance. This compact package supports high-density routing in portable and automotive ECUs where board space is constrained.
MAX6388XS29D4-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- 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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6388XS29D4-T FAQ
1.How can I place an order for MAX6388XS29D4-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6388XS29D4-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 MAX6388XS29D4-T reliable?
The price and inventory of MAX6388XS29D4-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6388XS29D4-T is usually 5 days.
3.What payment methods are accepted for MAX6388XS29D4-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6388XS29D4-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6388XS29D4-T?
MAX6388XS29D4-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6388XS29D4-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 MAX6388XS29D4-T?
For technical support, including MAX6388XS29D4-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6388XS29D4-T requirements.
6.How does Aetrix verify that MAX6388XS29D4-T is sourced from the original manufacturer or authorized distributors?
All MAX6388XS29D4-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 MAX6388XS29D4-T meets industry standards.
7.What is the process for return or replacement of MAX6388XS29D4-T?
All MAX6388XS29D4-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6388XS29D4-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 MAX6388XS29D4-T part is unused and in its original packaging.
Return procedure for MAX6388XS29D4-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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