My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6390XS16D4+
- Part No.:
- MAX6390XS16D4+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6390XS16D4+.pdf
- Description:
- MAX6390XS16D4+
- Quantity:
- Payment:
- Shipping:
Inventory:1,612
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6390XS16D4+ from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 1.58V VCC reset threshold (suffix '16'), and dual timeout configuration: 1120ms VCC reset timeout (D4) and 140ms manual reset timeout. It operates from +1.0V to +5.5V supply, consumes only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V - ideal for battery-powered embedded systems requiring reliable power-on reset and pushbutton-initiated recovery.
For engineers reviewing the MAX6390XS16D4+ datasheet, MAX6390XS16D4+ pinout, MAX6390XS16D4+ application, or MAX6390XS16D4+ equivalent, key selection considerations include its open-drain reset architecture, precise ±2.5% threshold accuracy over –40°C to +125°C, 1.56kΩ internal MR pullup resistor, negative-going transient immunity, and SC70-4 package compatibility with space-constrained portable designs.
Technical Context
The MAX6390XS16D4+ implements a precision bandgap-based voltage comparator monitoring VCC against a fixed 1.58V threshold, with hysteresis and temperature compensation ensuring ±2.5% accuracy across –40°C to +125°C. Its internal timer generates two distinct timeout periods: a long 1120ms VCC reset assertion after power-up/brownout and a short 140ms manual reset assertion after MR deassertion.
It features an active-low manual reset input (MR) with a low 1.56kΩ internal pullup resistor - significantly lower than earlier family members - enabling robust noise immunity in noisy environments without external components. The open-drain RESET output requires an external pullup and supports mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 1.58V (factory-trimmed, ±2.5% over –40°C to +125°C) - ensures deterministic reset initiation during low-voltage brownout conditions |
| VCC Operating Range | +1.0V to +5.5V - supports operation down to near-dead-battery levels while maintaining valid reset logic |
| VCC Reset Timeout | 1120ms (min) - provides sufficient hold time for slow-ramping power supplies or complex μP initialization sequences |
| Manual Reset Timeout | 140ms (min) - enables fast, user-triggered recovery without interfering with main power-up timing |
| Supply Current | 3μA at +1.8V - minimizes quiescent drain in always-on battery backup circuits |
| MR Pullup Resistance | 1.56kΩ - delivers strong internal bias for noise-immune manual reset detection without external components |
| RESET Output Type | Open-drain active-low - allows wired-OR configuration and level-shifting across different I/O voltage domains |
Pinout & Package
MAX6390XS16D4+ is housed in a RoHS-compliant 4-pin SC70 package (package code X4+1), measuring 2.0mm × 2.1mm × 0.95mm, suitable for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Primary supply input and monitored voltage rail; powers internal circuitry and serves as reference for reset threshold detection |
| 2 | RESET (open-drain) | Active-low reset output requiring external pullup; asserts low during VCC undervoltage or MR activation and holds for respective timeout period |
| 3 | MR (manual reset) | Active-low input with 1.56kΩ internal pullup to VCC; pulling low forces immediate reset assertion independent of VCC level |
| 4 | GND | Analog and digital ground reference; must be connected to system ground plane for stable comparator operation and noise rejection |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent timeout periods | 1120ms VCC reset timeout + 140ms manual reset timeout - decouples power-up reliability from user-initiated recovery timing |
| Low-threshold precision supervision | 1.58V reset threshold with ±2.5% accuracy over full industrial temperature range - enables use with ultra-low-voltage microcontrollers and SoCs |
| Noise-immune manual reset | 1.56kΩ internal MR pullup - eliminates need for external pullup and improves immunity to EMI-induced false triggers |
| Valid reset down to VCC = 1V | Guaranteed correct logic state on RESET pin even as supply collapses - prevents spurious release during deep brownout |
| Negative-going transient rejection | Immunity to sub-µs VCC glitches below threshold - avoids false resets caused by switching noise or load transients |
Applications
| Portable Medical Sensors | Battery-Powered IoT Edge Nodes |
|---|---|
Use Scenario: Wearable glucose monitor operating from single-cell Li-ion battery with dynamic voltage sag during RF transmission. IC Role / Device Role / Timing Role: Supervises core supply rail and asserts reset if voltage drops below 1.58V during discharge or pulse load; MR enables field-service recalibration via button press. Use Value: Prevents firmware corruption during brownout and ensures deterministic restart after user-initiated sensor reinitialization. | Use Scenario: LoRaWAN node powered by coin cell, sleeping >99% of time and waking periodically to sample environmental data. IC Role / Device Role / Timing Role: Provides ultra-low-current (3μA) power-on reset and validates supply stability before waking MCU; open-drain RESET interfaces directly with 1.8V logic domain. Use Value: Extends battery life by minimizing quiescent current while guaranteeing safe startup under marginal voltage conditions. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
Use Scenario: DIN-rail mounted controller with 3.3V logic supply derived from unregulated 24V bus, subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Monitors 3.3V rail and asserts open-drain reset to all downstream peripherals; MR allows maintenance-mode forced reboot via service port. Use Value: Ensures synchronized recovery of distributed I/O after power disturbance without requiring layout changes for pullup placement. | Use Scenario: Door module with 5V supply from vehicle battery, exposed to cranking dips and load dump spikes. IC Role / Device Role / Timing Role: Supervises 5V rail with 1.58V threshold (scaled via external divider if needed) and provides AEC-Q100-compliant reset signaling; MR supports diagnostic mode entry. Use Value: Meets automotive reset timing requirements (1120ms hold) while supporting service diagnostics via dedicated manual reset path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326XR16D4+T | Same 1.58V threshold and 1120ms timeout, but push-pull active-low output and no MR input | Lacks manual reset capability; suited for fixed-supply systems where operator intervention is unnecessary | Select when board-level reset control suffices and open-drain flexibility is not required |
| TPS3808G16DBVR | 1.6V threshold (±0.5%), 1200ms timeout, push-pull active-low, 1.8–6V operation, 1.1μA typical ICC | Higher accuracy and lower current, but no MR input and incompatible pinout | Choose for ultra-low-power applications needing tighter threshold tolerance, accepting redesign for MR omission |
Compared with MAX6326XR16D4+T and TPS3808G16DBVR, the MAX6390XS16D4+ uniquely combines open-drain output, integrated MR with low-resistance pullup, and dual-timing architecture - making it optimal for compact, user-serviceable, mixed-voltage embedded systems where layout space and functional completeness are critical.
Availability
MAX6390XS16D4+ is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered IoT edge nodes, industrial PLC I/O modules, and automotive body control units requiring stable component supply and guaranteed long-term manufacturability.
Supply support for MAX6390XS16D4+ 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 family delivers ultra-low-power, high-accuracy microprocessor supervisory circuits optimized for space-constrained, battery-sensitive systems requiring guaranteed reset behavior across wide temperature and voltage ranges.
FAQ
What is the exact reset threshold voltage of the MAX6390XS16D4+?
The MAX6390XS16D4+ has a factory-trimmed VCC reset threshold of 1.58V, with guaranteed accuracy of ±2.5% over the full operating temperature range of –40°C to +125°C. This value is confirmed in the Reset Thresholds table of the datasheet (suffix '16') and applies specifically to the MAX6390XS16D4+ variant, not the broader MAX6390 family.
Does the MAX6390XS16D4+ support manual reset functionality?
Yes, the MAX6390XS16D4+ includes an active-low manual reset input (MR) with a 1.56kΩ internal pullup resistor to VCC. Driving MR low forces immediate reset assertion, which remains active for 140ms (min) after MR is released. This feature is explicitly documented for MAX6390 in the General Description and Pin Description sections.
What is the purpose of the open-drain RESET output on the MAX6390XS16D4+?
The open-drain RESET output on the MAX6390XS16D4+ enables wired-OR connection with other reset sources and supports level translation across different voltage domains (e.g., interfacing a 1.8V MCU with a 3.3V peripheral). It requires an external pullup resistor and is specified to sink 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V - a design feature unique to the MAX6383/MAX6386/MAX6389/MAX6390 variants.
Can the MAX6390XS16D4+ operate reliably at very low supply voltages?
Yes, the MAX6390XS16D4+ guarantees correct RESET output logic state down to VCC = 1.0V, and operates across a full VCC range of +1.0V to +5.5V. Its 3μA supply current at +1.8V and validated performance at 1V make it suitable for deeply discharged battery scenarios where other supervisors may fail to assert reset correctly.
Is the MAX6390XS16D4+ pin-compatible with older Maxim reset ICs like the MAX809?
Yes, the MAX6390XS16D4+ is pin-compatible with MAX809/MAX810/MAX803 and other listed predecessors per the datasheet's "Pin Compatible with" statement. However, due to its 4-pin SC70 package and inclusion of MR, direct replacement requires verification that the target board implements MR connectivity and accommodates the open-drain output topology - unlike the push-pull outputs of MAX809-series parts.
MAX6390XS16D4+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6390XS16D4+ FAQ
1.How can I place an order for MAX6390XS16D4+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6390XS16D4+ 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 MAX6390XS16D4+ reliable?
The price and inventory of MAX6390XS16D4+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6390XS16D4+ is usually 5 days.
3.What payment methods are accepted for MAX6390XS16D4+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6390XS16D4+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6390XS16D4+?
MAX6390XS16D4+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6390XS16D4+ 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 MAX6390XS16D4+?
For technical support, including MAX6390XS16D4+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6390XS16D4+ requirements.
6.How does Aetrix verify that MAX6390XS16D4+ is sourced from the original manufacturer or authorized distributors?
All MAX6390XS16D4+ 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 MAX6390XS16D4+ meets industry standards.
7.What is the process for return or replacement of MAX6390XS16D4+?
All MAX6390XS16D4+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6390XS16D4+, 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 MAX6390XS16D4+ part is unused and in its original packaging.
Return procedure for MAX6390XS16D4+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6390XS16D4+ 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…
