My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6387XS29D3
- Part No.:
- MAX6387XS29D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-82A, SOT-343
- Datasheet:
-
MAX6387XS29D3.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,079
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6387XS29D3 from Maxim Integrated is a low-power 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), 140ms minimum reset timeout, and auxiliary RESET IN input for dual-voltage monitoring in portable battery-powered systems.
For engineers reviewing the MAX6387XS29D3 datasheet, MAX6387XS29D3 pinout, MAX6387XS29D3 application, or MAX6387XS29D3 equivalent, key selection criteria include its 2.93V threshold accuracy, 140ms timeout, 3µA supply current at 1.8V, 4-pin SC70 package, and dual-monitoring capability via RESET IN comparator referenced to 1.27V.
Technical Context
The MAX6387XS29D3 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.93V threshold while simultaneously comparing an external voltage at RESET IN to an internal 1.27V reference. It asserts reset when either monitored voltage falls below its respective threshold.
Its internal timer guarantees a minimum 140ms reset assertion after VCC or RESET IN recovers, and the push-pull output drives low with VOL ≤ 0.3V at 80µA sink current down to VCC = 1.0V - ensuring valid logic state during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.93V (min 2.85V, max 3.00V); factory-trimmed ±2.5% over −40°C to +125°C for reliable brownout detection |
| Reset Timeout Period | 140ms (min); ensures µP remains held in reset long enough for stable power rail recovery |
| Supply Current | 3µA at +1.8V; enables multi-year operation in coin-cell–powered devices |
| RESET Output Type | Active-low push-pull; eliminates need for external pullup and supports direct µP reset input drive |
| RESET IN Threshold | 1.27V (±20mV); allows user-configurable secondary voltage monitoring via resistor divider |
| Operating Voltage Range | +1.0V to +5.5V; guarantees functional reset assertion down to VCC = 1.0V |
| Temp Range | −40°C to +125°C; qualified for automotive under-hood and industrial embedded environments |
Pinout & Package
MAX6387XS29D3 is housed in a lead-free 4-pin SC70 package (package code X4-1), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and pin 1 marked by a dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input and primary voltage monitor; powers internal circuitry and sets fixed reset threshold |
| 2 | RESET | Active-low push-pull output; drives low during reset assertion, high otherwise; no external pullup required |
| 3 | RESET IN | Auxiliary voltage monitor input; compared to internal 1.27V reference to enable dual-rail supervision |
| 4 | GND | Analog/digital ground reference; must be connected to system ground plane for accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of VCC and external rail via RESET IN, enabling core/I/O voltage coordination |
| Factory-trimmed reset threshold | 2.93V with ±2.5% tolerance over full temperature range - eliminates external resistor calibration |
| Ultra-low quiescent current | 3µA at 1.8V - extends battery life in always-on wearable and sensor nodes |
| Guaranteed reset validity down to VCC = 1.0V | Ensures deterministic reset behavior during deep brownout, critical for fail-safe embedded boot sequences |
| Negative-going transient immunity | Rejects sub-100ns VCC glitches up to 100mV overdrive - improves noise robustness in noisy DC/DC environments |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
Use Scenario: A wireless environmental sensor powered by a CR2032 coin cell must maintain accurate reset behavior across temperature and battery discharge. IC Role / Device Role / Timing Role: MAX6387XS29D3 monitors both VCC (3.0V nominal) and backup LDO output (1.8V) via RESET IN to prevent firmware execution during partial power loss. Use Value: 2.93V threshold matches typical LiMnO₂ end-of-life voltage; 140ms timeout ensures MCU completes safe shutdown before brownout. | Use Scenario: An industrial digital I/O module requires coordinated reset of FPGA and microcontroller when either 5V system rail or 3.3V I/O rail dips. IC Role / Device Role / Timing Role: MAX6387XS29D3 supervises main 5V rail (VCC) and isolated 3.3V I/O supply (via RESET IN resistor divider) to trigger simultaneous reset. Use Value: Dual-input architecture avoids separate supervisors; push-pull output directly drives FPGA PROG_B and MCU RESET pins without level-shifting. |
| Automotive Body Control Module | Medical Wearable Patch Monitor |
Use Scenario: A BCM must survive cold-cranking transients while reliably resetting microcontroller upon battery recovery. IC Role / Device Role / Timing Role: MAX6387XS29D3 monitors 12V-to-5V supply (VCC) and 5V-to-3.3V LDO (via RESET IN) to assert reset only when both rails are stable. Use Value: −40°C to +125°C rating and 100mV glitch immunity ensure operation during engine start; 140ms timeout aligns with CAN bus wake-up timing. | Use Scenario: A disposable ECG patch uses a single-cell alkaline battery and must avoid false resets during motion-induced voltage sag. IC Role / Device Role / Timing Role: MAX6387XS29D3 monitors battery voltage (VCC) and analog front-end supply (via RESET IN) to suppress reset during brief 200ms sags above 2.5V. Use Value: 3µA supply current enables >5-year shelf life; 2.93V threshold prevents premature reset during normal discharge curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6387LT29D3 | Same electrical specs but in 6-pin µDFN-6 (L611-1) package; 1.5mm × 1.0mm footprint vs. SC70's 2.0mm × 2.1mm | Preferred for space-constrained PCBs requiring finer pitch and lower profile (0.8mm height) | Select LT version when board area is limited and µDFN reflow compatibility is confirmed |
| TPS3808G33DBVR | TI part with 3.3V threshold (not 2.93V); 350ms min timeout; 1.6µA ICC at 1.8V; open-drain output requiring pullup | Suitable where higher threshold and longer timeout are acceptable, and open-drain interface is already used | Choose only if system design accommodates 3.3V trip point and external pullup; not drop-in compatible |
Compared with MAX6387XS29D3, the LT29D3 offers identical functionality in a smaller, lower-profile package ideal for ultra-thin modules, while the TPS3808G33DBVR provides lower current but requires layout changes for pullup and cannot supervise dual rails.
Availability
MAX6387XS29D3 is available at Aetrix Electronics and suitable for battery-powered IoT sensors, industrial PLC I/O modules, automotive body control units, and medical wearable patches requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6387XS29D3 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, with emphasis on reliability and low-power operation.
The MAX6381–MAX6390 family was developed specifically for space- and power-constrained embedded systems needing dual-rail supervision, factory-trimmed thresholds, and guaranteed reset behavior down to 1.0V VCC.
FAQ
What is the exact reset threshold voltage of MAX6387XS29D3 and how stable is it over temperature?
The MAX6387XS29D3 has a factory-set VCC reset threshold of 2.93V, with a guaranteed range of 2.85V (min) to 3.00V (max) across −40°C to +125°C. Its ±2.5% accuracy and 60ppm/°C tempco ensure minimal drift in automotive and industrial environments. This specification is verified per Maxim's production test flow and applies directly to the MAX6387XS29D3 device.
Does MAX6387XS29D3 support monitoring of two independent power rails?
Yes, MAX6387XS29D3 supports dual-rail supervision: VCC is monitored against its fixed 2.93V threshold, while the RESET IN pin compares an external voltage to an internal 1.27V reference. When either voltage drops below its threshold, MAX6387XS29D3 asserts its active-low reset output - enabling coordinated reset of core and I/O supplies without additional components.
What is the function of the RESET IN pin on MAX6387XS29D3 and how is its threshold set?
The RESET IN pin on MAX6387XS29D3 is a high-impedance input to a comparator referenced to an internal 1.27V bandgap. To set a custom threshold, connect RESET IN to the center node of a resistor divider between VCC and GND. Using R1 = R2 × ((VINTH/1.27V) − 1), a 2.5V rail can be monitored with R2 = 100kΩ and R1 ≈ 97.6kΩ. MAX6387XS29D3 guarantees <50nA input leakage for accuracy.
Can MAX6387XS29D3 operate reliably at very low supply voltages?
Yes, MAX6387XS29D3 guarantees correct reset output logic state down to VCC = 1.0V - critical for detecting deep brownout conditions. Its push-pull output maintains VOL ≤ 0.3V at 80µA sink current even at 1.0V, ensuring clean reset signaling to µPs with low-VIL requirements. This behavior is characterized and specified across the full −40°C to +125°C range for MAX6387XS29D3.
What package type and dimensions does MAX6387XS29D3 use, and is it RoHS-compliant?
MAX6387XS29D3 uses a lead-free 4-pin SC70 package (X4-1 code), measuring 2.0mm × 2.1mm × 0.95mm with gull-wing leads. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1). The package drawing is documented in Maxim's package outline 21-0098, and MAX6387XS29D3 is marked with standard top-side laser text including date code and lot traceability.
MAX6387XS29D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-4
MAX6387XS29D3 FAQ
1.How can I place an order for MAX6387XS29D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6387XS29D3 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 MAX6387XS29D3 reliable?
The price and inventory of MAX6387XS29D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6387XS29D3 is usually 5 days.
3.What payment methods are accepted for MAX6387XS29D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6387XS29D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6387XS29D3?
MAX6387XS29D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6387XS29D3 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 MAX6387XS29D3?
For technical support, including MAX6387XS29D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6387XS29D3 requirements.
6.How does Aetrix verify that MAX6387XS29D3 is sourced from the original manufacturer or authorized distributors?
All MAX6387XS29D3 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 MAX6387XS29D3 meets industry standards.
7.What is the process for return or replacement of MAX6387XS29D3?
All MAX6387XS29D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6387XS29D3, 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 MAX6387XS29D3 part is unused and in its original packaging.
Return procedure for MAX6387XS29D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6387XS29D3 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…
