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Analog Devices Inc./Maxim Integrated MAX6315US26D3-T
- Part No.:
- MAX6315US26D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US26D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,246
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Product details
Overview
MAX6315US26D3-T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain active-low RESET signal when voltage falls below 2.63V or when manual reset (MR) is asserted. It provides factory-trimmed 2.63V reset threshold, 140ms minimum reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C for use in battery-powered instrumentation and industrial controllers.
For engineers reviewing the MAX6315US26D3-T datasheet, MAX6315US26D3-T pinout, MAX6315US26D3-T application, or MAX6315US26D3-T equivalent, this page delivers verified electrical parameters, SOT23-4 package mapping, reset timing behavior under brownout conditions, and validated alternative supervisory circuits with matching threshold and timeout profiles.
Technical Context
The MAX6315US26D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.63V nominal reset threshold, with ±3.5% tolerance over -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a guaranteed minimum 140ms reset pulse after VCC recovery or MR release.
It features an open-drain RESET output capable of sinking 3.2mA at VCC > 4.25V while allowing pullup to voltages up to +6.0V - enabling level-shifting across supply domains. The MR input includes a 63kΩ internal pullup and rejects transients < 100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V nominal, ±3.5% over full temperature range - ensures reliable brownout detection for 2.7V–3.3V logic systems |
| Reset Timeout Period | 140ms minimum (–40°C to +85°C), 112ms minimum (–40°C to +125°C) - guarantees sufficient processor initialization time |
| Supply Current | 5μA typical at +25°C, ≤15μA at +125°C - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V - supports monitoring of low-voltage rails including 1.8V and 2.5V supplies |
| RESET Output Type | Open-drain n-channel MOSFET - allows pullup to any voltage ≤6.0V, enabling cross-supply reset signaling |
| MR Input Threshold | VIL = 0.3×VCC, VIH = 0.7×VCC - compatible with standard CMOS logic driving from same or different supply |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6315US26D3-T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 is GND, Pin 2 is RESET (active-low open-drain), Pin 3 is MR (manual reset input), and Pin 4 is VCC (supply and threshold monitor input).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and reset timer; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current during reset assertion; requires external pullup resistor (typically 10kΩ) to target supply (≤6.0V) |
| MR (Pin 3) | Manual reset input | Logic-low assertion forces immediate reset; internal 63kΩ pullup allows direct switch-to-ground connection without external components |
| VCC (Pin 4) | Supply voltage and threshold monitor | Both powers the IC and serves as monitored rail; internally divided to compare against 2.63V reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.63V reset threshold | Eliminates external resistor network and calibration, reducing BOM count and layout area in space-constrained designs |
| 140ms minimum reset timeout | Ensures μP/μC completes power-rail stabilization and internal clock lock before release, preventing boot failures |
| Open-drain RESET with 6.0V absolute max rating | Permits reset signaling from a 2.63V-monitored rail to a 3.3V or 5V reset domain without level translators |
| 5μA supply current at +25°C | Extends battery life in portable medical sensors and IoT edge nodes where duty-cycled supervision is critical |
| Immunity to VCC transients ≤100ns | Rejects EMI-induced noise spikes on supply lines, avoiding spurious resets in electrically noisy industrial settings |
Applications
| Industrial PLC I/O Modules | Battery-Powered Data Loggers |
|---|---|
|
Use Scenario: Monitoring 3.3V microcontroller supply in DIN-rail mounted programmable logic controller modules exposed to wide ambient temperature swings and conducted EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M4 core during brownout events and cold starts. Use Value: Guaranteed 140ms reset hold time ensures firmware bootloader execution completes before peripheral initialization begins. |
Use Scenario: Long-term environmental monitoring node powered by CR2032 coin cell, sampling temperature/humidity every 10 minutes. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor maintaining system integrity during battery voltage sag between wake cycles. Use Value: 5μA ICC enables >5-year operation while preserving accurate 2.63V trip point across –40°C to +85°C operating range. |
| Automotive Body Control Units | Medical Infusion Pump Controllers |
|
Use Scenario: Reset management for ASIL-B compliant microcontroller in door module subjected to load dump and cold crank conditions. IC Role / Device Role / Timing Role: Voltage supervisor detecting VCC dip below 2.63V during cranking and holding RESET until stable 3.3V rail is restored. Use Value: –40°C to +125°C qualification and ±3.5% threshold accuracy ensure deterministic reset behavior under extreme thermal stress. |
Use Scenario: Safety-critical infusion pump MCU requiring fail-safe restart after power interruption or user-initiated reset. IC Role / Device Role / Timing Role: Dual-trigger supervisor responding to both supply fault and hardware MR button press with identical 140ms timeout. Use Value: Internal MR pullup and glitch rejection eliminate need for external debounce, reducing component count and failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US26D3-T | Bidirectional reset pin support; otherwise identical 2.63V threshold and 140ms timeout | Required only when interfacing with microcontrollers that drive reset pin actively (e.g., some PIC and STM32 variants) | Select MAX6314US26D3-T if μC reset pin is bidirectional; otherwise MAX6315US26D3-T is optimal for standard active-low inputs |
| TPS3808G125DBVR | 2.63V threshold with 200ms min timeout; 1.5μA ICC; supports enable input but no MR pin | Lacks manual reset functionality; suited for systems where reset initiation is software- or power-only controlled | Choose TPS3808G125DBVR when lowest possible quiescent current is prioritized and manual reset is unnecessary |
Compared with MAX6314US26D3-T, MAX6315US26D3-T offers simpler interface for unidirectional reset pins and eliminates enable logic overhead; versus TPS3808G125DBVR, it trades 1.5μA ultra-low ICC for integrated MR functionality and tighter thermal stability in extended temperature operation.
Availability
MAX6315US26D3-T is available at Aetrix Electronics and suitable for industrial automation, battery-powered instrumentation, automotive body electronics, and medical device applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US26D3-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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6315 series was designed specifically for cost-sensitive, space-constrained μP supervision tasks requiring precision voltage monitoring, low power, and robust transient immunity - especially in portable and harsh-environment systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US26D3-T?
The MAX6315US26D3-T has a factory-trimmed nominal reset threshold of 2.63V, with tolerance of ±3.5% over the full –40°C to +125°C operating range. This value is laser-trimmed during production and specified in the Ordering Information table of the official Analog Devices datasheet. The MAX6315US26D3-T does not support adjustable thresholds - all units ship with fixed 2.63V detection.
Does the MAX6315US26D3-T require external components for basic operation?
No, the MAX6315US26D3-T requires only an external pullup resistor on the RESET pin (typically 10kΩ) and a 0.1μF bypass capacitor on VCC. It integrates a 63kΩ internal pullup on the MR pin, eliminating the need for external pullup when using a momentary switch to ground. No trimming resistors, capacitors, or voltage references are needed for standard supervision functionality.
Can the RESET output of the MAX6315US26D3-T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US26D3-T features an open-drain RESET output rated for up to +6.0V absolute maximum, independent of VCC. This allows the RESET signal to interface with higher-voltage logic domains - for example, pulling up to 3.3V or 5V while monitoring a 2.63V supply rail - without requiring external level-shifting circuitry.
What is the guaranteed minimum reset timeout period for the MAX6315US26D3-T across temperature?
The MAX6315US26D3-T guarantees a minimum reset timeout period of 112ms over –40°C to +125°C, and 140ms over –40°C to +85°C. These values are specified in the Electrical Characteristics table under "Reset Timeout Period" for the D3-T variant. The actual timeout may extend beyond these minima depending on process variation and temperature, but will never fall short.
Is the MAX6315US26D3-T pin-compatible with other members of the MAX6315 family?
Yes, all MAX6315 variants - including MAX6315US26D1-T, MAX6315US26D2-T, and MAX6315US26D3-T - share identical 4-pin SOT23 (U4+1) packaging and pinout: Pin 1 = GND, Pin 2 = RESET, Pin 3 = MR, Pin 4 = VCC. Only the reset threshold voltage and timeout period differ between part numbers; no PCB layout change is required when upgrading or substituting within the same threshold group.
MAX6315US26D3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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:
- SOT-143-4
MAX6315US26D3-T FAQ
1.How can I place an order for MAX6315US26D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US26D3-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 MAX6315US26D3-T reliable?
The price and inventory of MAX6315US26D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US26D3-T is usually 5 days.
3.What payment methods are accepted for MAX6315US26D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US26D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US26D3-T?
MAX6315US26D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US26D3-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 MAX6315US26D3-T?
For technical support, including MAX6315US26D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US26D3-T requirements.
6.How does Aetrix verify that MAX6315US26D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US26D3-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 MAX6315US26D3-T meets industry standards.
7.What is the process for return or replacement of MAX6315US26D3-T?
All MAX6315US26D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US26D3-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 MAX6315US26D3-T part is unused and in its original packaging.
Return procedure for MAX6315US26D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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