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Analog Devices Inc./Maxim Integrated MAX6383LT46D3+T
- Part No.:
- MAX6383LT46D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 6-WFDFN
- Datasheet:
-
MAX6383LT46D3+T.pdf
- Description:
- IC MPU/RESET CIRC 4.63V 6-UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,912
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Product details
Overview
MAX6383LT46D3+T from Maxim Integrated is a low-power microprocessor supervisory circuit with open-drain active-low reset output, factory-set 4.63V reset threshold (±2.5% over −40°C to +125°C), and 140ms minimum reset timeout period. It monitors VCC from +1.8V to +5.0V while consuming only 3μA at +1.8V, and guarantees valid reset state down to VCC = 1V. It is used in battery-powered embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6383LT46D3+T datasheet, MAX6383LT46D3+T pinout, MAX6383LT46D3+T application, or MAX6383LT46D3+T equivalent, key selection considerations include its open-drain reset architecture, 4.63V threshold tolerance, 140ms timeout timing, SC70/μDFN package compatibility, and absence of manual reset or auxiliary voltage monitoring inputs.
Technical Context
The MAX6383LT46D3+T implements a precision bandgap-based reset comparator with ±2.5% threshold accuracy across −40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms minimum reset assertion window after VCC recovers above 4.63V.
As an open-drain device, it requires an external pullup resistor on the RESET pin and supports mixed-voltage system interfacing. It lacks MR input and RESET IN functionality-distinguishing it from MAX6384–MAX6390 and MAX6387–MAX6389 variants-and is optimized for single-supply monitoring in space-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal (±2.5% over −40°C to +125°C); ensures reliable detection of 5V supply brownout before μP malfunction. |
| Reset Timeout | 140ms minimum; holds reset asserted long enough for stable power-up of downstream logic and memory. |
| Supply Current | 3μA at +1.8V; enables multi-year operation in coin-cell–powered IoT sensors and wearables. |
| Operating Voltage | +1.0V to +5.5V; guarantees functional reset assertion even during deep brownout down to 1V VCC. |
| Output Type | Open-drain active-low; allows wired-OR configuration and level-shifting with external pullup to any logic rail ≤6.0V. |
| Reset Propagation Delay | 35μs (VCC falling at 10mV/µs); fast response to rapid supply collapse without false triggering. |
| Package | 6-pin μDFN (2mm × 2mm, 0.5mm pitch); supports high-density PCB layouts in portable equipment. |
Pinout & Package
MAX6383LT46D3+T is housed in a 6-pin μDFN package (Outline Number 21-0147, Land Pattern 90-0080) with wettable flanks, RoHS-compliant, and rated for −40°C to +125°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparators and timer; must be connected directly to low-impedance system ground plane. |
| 2 | VCC | Main supply input; powers internal circuitry and serves as monitored voltage source for reset threshold comparison. |
| 3 | N.C. | No internal connection; left unconnected per design-no routing or termination required. |
| 4 | RESET | Open-drain active-low reset output; sinks up to 3.2mA at VCC ≥ 4.5V; requires external pullup resistor (typically 10kΩ). |
| 5 | N.C. | No internal connection; electrically isolated-must not be tied to any signal or power net. |
| 6 | N.C. | No internal connection; unused pad-no thermal or electrical function; may be grounded for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±2.5% accuracy over full temperature range-eliminates external resistor divider calibration. |
| Ultra-low quiescent current | 3μA at 1.8V-enables >10-year battery life in always-on sensor nodes with 20mAh coin cells. |
| Valid reset down to 1V VCC | Ensures deterministic μP initialization even during severe brownout events before supply collapse. |
| Open-drain output architecture | Supports flexible interface to 1.8V/3.3V/5V logic families and enables multiple reset sources via wired-OR topology. |
| High noise immunity | Guaranteed rejection of negative-going VCC transients ≤35μs at 100mV overdrive-reduces false resets in noisy environments. |
Applications
| Industrial PLC I/O Modules | Medical Wearable Sensors |
|---|---|
Use Scenario: Power sequencing and fault recovery in DIN-rail mounted programmable logic controllers with dual 24V/5V rails. IC Role / Device Role / Timing Role: Monitors 5V logic supply and asserts open-drain reset to ARM Cortex-M microcontroller during undervoltage events. Use Value: Prevents firmware corruption during factory floor voltage sags by guaranteeing 140ms reset hold time and accurate 4.63V trip point. | Use Scenario: Battery-powered ECG patch with ultra-low-power Bluetooth LE MCU and analog front-end. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and triggers hardware reset when coin cell drops below 4.63V threshold. Use Value: Extends usable battery life by drawing only 3μA while ensuring safe shutdown before ADC/RF instability occurs. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Reset supervision for LIN gateway microcontrollers in door module ECUs exposed to load-dump transients. IC Role / Device Role / Timing Role: Provides fail-safe reset signaling to Infineon AURIX TC2xx via open-drain output compatible with 5V tolerant GPIO. Use Value: Meets AEC-Q100 stress requirements with guaranteed operation to +125°C and robust transient immunity. | Use Scenario: Dual-rail power monitoring in Wi-Fi–enabled smart thermostat with 5V USB input and 3.3V SoC domain. IC Role / Device Role / Timing Role: Detects 5V rail collapse and asserts reset to ESP32-WROOM-32 through 10kΩ pullup to 3.3V. Use Value: Enables clean reboot without software watchdog intervention-critical for OTA update reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6383XR46D3+T | Same electrical specs but in 3-pin SC70 package (2.0mm × 2.1mm); no N.C. pins; higher θJA (340.4°C/W). | Suitable for ultra-compact designs where board area is more critical than thermal performance. | Select XR variant when footprint minimization outweighs thermal derating needs in low-power ambient environments. |
| TLV809E46DBZR | TI part with same 4.63V threshold and 140ms timeout, but push-pull active-low output and 1.8V–6V operating range. | Eliminates need for external pullup; incompatible with wired-OR reset buses requiring open-drain topology. | Choose TLV809E46DBZR only if system uses dedicated reset line and benefits from reduced BOM count. |
Compared with MAX6383XR46D3+T, the LT46D3+T offers lower thermal resistance in μDFN packaging for better power dissipation in thermally constrained layouts; versus TLV809E46DBZR, it preserves open-drain flexibility essential for multi-source reset arbitration but requires one additional passive component.
Availability
MAX6383LT46D3+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensors, automotive body control units, and smart home hub power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6383LT46D3+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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6381–MAX6390 family delivers single/dual low-voltage, low-power μP reset circuits optimized for space-constrained, battery-sensitive systems requiring high accuracy, wide temperature operation, and minimal quiescent current.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6383LT46D3+T?
The MAX6383LT46D3+T has a factory-set nominal reset threshold of 4.63V, 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 official datasheet and applies specifically to the "46" suffix. The threshold remains stable with a tempco of 60ppm/°C, making MAX6383LT46D3+T suitable for applications demanding precise 5V supply monitoring under thermal stress.
Does MAX6383LT46D3+T include a manual reset input (MR)?
No, MAX6383LT46D3+T does not feature a manual reset input. Per the Selector Guide and Pin Configurations, MR is only present on MAX6384/MAX6385/MAX6386/MAX6390 variants. The MAX6383LT46D3+T is a dedicated VCC-monitoring device with open-drain reset output only-no MR pin, no RESET IN pin, and no auxiliary monitoring capability. This simplifies layout but requires external circuitry if system-level manual reset is needed.
What package type and dimensions does MAX6383LT46D3+T use?
MAX6383LT46D3+T is packaged in a 6-pin μDFN (micro Dual Flat No-lead) with 2mm × 2mm body size, 0.5mm pin pitch, and wettable flanks. Its outline number is 21-0147 and land pattern number is 90-0080. This RoHS-compliant, lead-free package supports reflow soldering at +260°C and is rated for operation from −40°C to +125°C-making MAX6383LT46D3+T appropriate for automotive and industrial deployments where thermal reliability is critical.
Can MAX6383LT46D3+T operate with supply voltages below 1.8V?
Yes, MAX6383LT46D3+T operates from VCC = +1.0V to +5.5V. While its typical supply current is specified down to 1.8V (3μA), the device guarantees functional reset assertion down to 1.0V VCC-ensuring the RESET output remains in a valid logic state even during deep brownout. However, the 4.63V reset threshold is only meaningful when VCC exceeds that level; below 4.63V, the comparator asserts reset. Thus, MAX6383LT46D3+T remains fully operational and deterministic at 1.0V, unlike many competitors that cease functioning below 1.6V.
Is MAX6383LT46D3+T pin-compatible with older Maxim reset ICs like MAX809?
Yes, MAX6383LT46D3+T is explicitly listed as pin-compatible with MAX809/MAX810/MAX803 and other legacy Maxim supervisors in the Features section of the datasheet. However, this compatibility applies only to functional pin assignment-not identical package footprint. The MAX6383LT46D3+T uses a 6-pin μDFN, whereas MAX809 uses SOT23-3; thus, direct PCB replacement requires layout adaptation. The pinout mapping (GND, VCC, RESET) aligns logically, but MAX6383LT46D3+T adds three N.C. pins to accommodate its μDFN form factor.
MAX6383LT46D3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-µDFN (1.5x1)
MAX6383LT46D3+T FAQ
1.How can I place an order for MAX6383LT46D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6383LT46D3+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 MAX6383LT46D3+T reliable?
The price and inventory of MAX6383LT46D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6383LT46D3+T is usually 5 days.
3.What payment methods are accepted for MAX6383LT46D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6383LT46D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6383LT46D3+T?
MAX6383LT46D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6383LT46D3+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 MAX6383LT46D3+T?
For technical support, including MAX6383LT46D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6383LT46D3+T requirements.
6.How does Aetrix verify that MAX6383LT46D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6383LT46D3+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 MAX6383LT46D3+T meets industry standards.
7.What is the process for return or replacement of MAX6383LT46D3+T?
All MAX6383LT46D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6383LT46D3+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 MAX6383LT46D3+T part is unused and in its original packaging.
Return procedure for MAX6383LT46D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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