My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6387XS29D2+T
- Part No.:
- MAX6387XS29D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6387XS29D2+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,991
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6387XS29D2+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit with active-low push-pull reset output, factory-set 2.93V VCC reset threshold (±2.5% over -40°C to +125°C), 20ms minimum 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 portable battery-powered equipment requiring dual-rail power monitoring.
For engineers reviewing the MAX6387XS29D2+T datasheet, MAX6387XS29D2+T pinout, MAX6387XS29D2+T application, or MAX6387XS29D2+T equivalent, key selection criteria include its 4-pin SC70 package, dual-supply monitoring capability, ±2.5% threshold accuracy across automotive temperature range, and compatibility with systems needing guaranteed reset assertion during brownout and transient events.
Technical Context
The MAX6387XS29D2+T integrates two independent voltage comparators: one monitors VCC against a fixed 2.93V threshold, while the second compares an external voltage applied to RESET IN against an internal 1.27V reference. Reset asserts when either monitored voltage falls below its respective threshold.
It features a 20ms minimum reset timeout period after VCC or RESET IN recovers, active-low push-pull RESET output capable of sinking 3.2mA at VCC ≥ 4.5V (VOL ≤ 0.4V), and operates from 1.0V to 5.5V supply with guaranteed functionality down to VCC = 1V.
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 temperature range |
| RESET Timeout Period | 20ms minimum - provides sufficient hold time for μP initialization after power recovery |
| Supply Current | 3μA at +1.8V - enables ultra-low-power operation in battery-critical applications |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor and supports direct interface to μP reset input |
| Auxiliary Input | RESET IN comparator referenced to 1.27V - allows user-defined secondary voltage monitoring via external resistor divider |
| Operating Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| Reset Assertion Validity | Valid down to VCC = 1V - ensures deterministic reset behavior as supply collapses |
Pinout & Package
MAX6387XS29D2+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 space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor rail - powers device and triggers reset when falling below 2.93V |
| 2 | RESET | Active-low push-pull reset output - drives low during fault and remains low for 20ms after recovery |
| 3 | GND | Ground reference - common return path for all internal circuitry and reset output sink current |
| 4 | RESET IN | Auxiliary voltage monitor input - compared to internal 1.27V reference; reset asserts if voltage drops below threshold |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of main VCC and secondary rail via RESET IN - enables robust dual-power-system reliability |
| Factory-trimmed reset threshold | 2.93V with ±2.5% accuracy over full -40°C to +125°C range - eliminates external calibration and improves system-level timing predictability |
| Ultra-low quiescent current | 3μA at +1.8V - extends battery life in always-on portable instrumentation without compromising supervision integrity |
| Guaranteed reset validity to 1V | RESET output remains logic-valid down to VCC = 1V - prevents spurious release during final stage of power collapse |
| Negative-going transient immunity | Immune to short-duration VCC glitches per published max transient duration vs. overdrive curve - reduces false resets in noisy environments |
Applications
| Portable Battery-Powered Equipment | Dual Voltage Systems |
|---|---|
Use Scenario: Handheld medical meters and wireless sensors operating from single-cell Li-ion or coin-cell batteries with split I/O and core rails. IC Role / Device Role / Timing Role: Supervises both VCORE (e.g., 1.8V) and VIO (e.g., 3.3V) rails using VCC and RESET IN inputs to ensure coordinated reset sequencing. Use Value: Prevents firmware corruption during partial brownout by asserting reset whenever either rail dips below its threshold, with 20ms hold time ensuring full μP initialization. | Use Scenario: Industrial PLC modules with separate 5V analog front-end and 3.3V digital processing supplies. IC Role / Device Role / Timing Role: Monitors 5V main supply on VCC and 3.3V auxiliary supply on RESET IN, triggering unified reset signal upon failure of either. Use Value: Eliminates need for two discrete supervisors, reducing BOM count and PCB area while maintaining independent threshold accuracy for each rail. |
| Intelligent Instruments | Critical μP and μC Power Monitoring |
Use Scenario: Precision handheld multimeters and data loggers requiring stable operation across wide temperature and battery discharge ranges. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation during cold-start and end-of-life battery conditions using guaranteed 1V operation and ±2.5% threshold stability. Use Value: Ensures deterministic boot sequence even at 1.2V VCC, preventing erratic behavior or lockup in low-power sleep/wake cycles. | Use Scenario: Automotive body control modules where microcontroller reliability must be maintained under load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Acts as primary power supervisor for MCU, asserting reset within 35µs of VCC crossing threshold and holding for 20ms post-recovery. Use Value: Meets AEC-Q100 requirements for timing-critical reset response, with thermal-stable thresholds preventing false triggers during engine compartment temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387LT29D2+T | Same electrical specs but in 6-pin µDFN package - larger footprint, better thermal performance (θJA = 477°C/W vs. 322.6°C/W) | Suitable for thermally demanding industrial applications where SC70 self-heating may affect long-term threshold drift | Select when board layout allows larger package and thermal margin is prioritized over size |
| MAX6389XS29D2+T | Identical pinout and thresholds, but open-drain RESET output - requires external pullup resistor and supports wired-OR configurations | Preferred in multi-supervisor systems or where level-shifting/reset sharing across voltage domains is required | Select when system architecture mandates open-drain reset bus or interoperability with legacy reset networks |
Compared with MAX6387XS29D2+T, the LT version trades compactness for thermal robustness in µDFN, while the MAX6389 variant replaces push-pull drive with open-drain flexibility-neither offers pin-to-pin replacement without schematic or layout revision.
Availability
MAX6387XS29D2+T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, dual voltage systems, intelligent instruments, and critical μP power monitoring requiring stable component supply across automotive temperature grades.
Supply support for MAX6387XS29D2+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.
The MAX6381–MAX6390 family delivers low-power, high-accuracy microprocessor supervisory circuits optimized for battery-sensitive and thermally demanding embedded systems requiring dual-rail monitoring and guaranteed reset behavior.
FAQ
What is the reset threshold voltage of the MAX6387XS29D2+T?
The MAX6387XS29D2+T has a factory-set VCC reset threshold of 2.93V, with ±2.5% accuracy guaranteed over the full operating temperature range of -40°C to +125°C. This value is fixed and non-adjustable, enabling precise brownout detection without external components. The MAX6387XS29D2+T uses this threshold to assert reset whenever VCC falls below 2.93V, and holds reset for 20ms after VCC recovers above the threshold.
Does the MAX6387XS29D2+T support monitoring of a second voltage rail?
Yes, the MAX6387XS29D2+T includes a dedicated RESET IN input that connects to an internal comparator referenced to 1.27V. By applying a divided version of a secondary voltage (e.g., VCORE or VIO) to this pin, the device can independently monitor a second rail. Reset asserts if either VCC drops below 2.93V or the voltage at RESET IN falls below 1.27V. This dual-monitoring capability is integral to the MAX6387XS29D2+T design and requires no additional ICs.
What is the reset output configuration of the MAX6387XS29D2+T?
The MAX6387XS29D2+T features an active-low push-pull reset output, meaning it actively drives the RESET pin low during fault conditions and high during normal operation - no external pullup resistor is needed. It can sink up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, and remains functional down to VCC = 1V. This output type differentiates the MAX6387XS29D2+T from open-drain variants like MAX6389XS29D2+T and simplifies interface to most microcontroller reset inputs.
What package type is used for the MAX6387XS29D2+T?
The MAX6387XS29D2+T is supplied in a lead(Pb)-free, RoHS-compliant 4-pin SC70 package (outline number 21-0098), measuring 2.0mm × 2.1mm × 0.95mm. This compact surface-mount package supports high-density PCB layouts typical in portable and wearable electronics. Its thermal resistance (θJA = 322.6°C/W on multilayer board) is optimized for low-power operation, and the pinout is fully documented in the MAX6387XS29D2+T datasheet Figure 9.
How does the MAX6387XS29D2+T handle power supply transients?
The MAX6387XS29D2+T provides inherent immunity to short-duration negative-going VCC transients (glitches) due to its internal comparator overdrive tolerance and propagation delay characteristics. Per the "Maximum Transient Duration vs. Reset Comparator Overdrive" graph in the datasheet, it avoids false resets for transients whose amplitude and duration fall below the specified curve. Adding a 0.1μF ceramic capacitor close to the VCC pin further enhances immunity - a design practice validated for the MAX6387XS29D2+T in typical operating circuits.
MAX6387XS29D2+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 Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6387XS29D2+T FAQ
1.How can I place an order for MAX6387XS29D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6387XS29D2+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 MAX6387XS29D2+T reliable?
The price and inventory of MAX6387XS29D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6387XS29D2+T is usually 5 days.
3.What payment methods are accepted for MAX6387XS29D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6387XS29D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6387XS29D2+T?
MAX6387XS29D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6387XS29D2+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 MAX6387XS29D2+T?
For technical support, including MAX6387XS29D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6387XS29D2+T requirements.
6.How does Aetrix verify that MAX6387XS29D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6387XS29D2+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 MAX6387XS29D2+T meets industry standards.
7.What is the process for return or replacement of MAX6387XS29D2+T?
All MAX6387XS29D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6387XS29D2+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 MAX6387XS29D2+T part is unused and in its original packaging.
Return procedure for MAX6387XS29D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6387XS29D2+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
