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Analog Devices Inc./Maxim Integrated MAX6315US26D2+T
- Part No.:
- MAX6315US26D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US26D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:6,959
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Product details
Overview
MAX6315US26D2+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain reset signal when voltage falls below 2.63V or upon manual reset assertion. It features a factory-trimmed 2.63V reset threshold, 20ms minimum reset timeout period, 5μA supply current at +25°C, and operates across –40°C to +125°C. It is used in battery-powered controllers and embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6315US26D2+T datasheet, MAX6315US26D2+T pinout, MAX6315US26D2+T application, or MAX6315US26D2+T equivalent, key selection criteria include reset threshold accuracy (±3.5% over full temperature range), open-drain output capable of pull-up to 6V, immunity to sub-100ns MR glitches, guaranteed reset assertion down to VCC = 1.0V, and SOT23-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6315US26D2+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 fixed 20ms (min) reset timeout after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting across supplies up to 6V, and includes an internal 63kΩ MR pullup resistor. The device is immune to VCC transients shorter than 100ns and guarantees reset assertion for VCC ≥ 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V nominal, ±3.5% over –40°C to +125°C - ensures reliable detection of 2.6V rail brownouts |
| Reset Timeout Period | 20ms minimum - provides sufficient hold time for μP initialization before release | 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 reset assertion even during deep brownout or partial power loss |
| MR Glitch Rejection | 100ns - suppresses noise-induced false resets on manual reset line |
| RESET Output Drive | Open-drain, 0.4V max VOL at 3.2mA sink - compatible with 3.3V/5V logic families and external pullups to higher rails |
Pinout & Package
MAX6315US26D2+T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052, land pattern 90-0183), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Drives low to assert reset; requires external pullup (e.g., 10kΩ) to any supply ≤6V; enables level-shifted reset signaling |
| MR (Pin 3) | Manual reset input | Logic-low assertion triggers reset; internal 63kΩ pullup allows direct switch-to-GND connection without external components |
| VCC (Pin 4) | Supply and monitor input | Power source and monitored rail; internal divider samples this node to detect undervoltage conditions |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 2.63V with ±3.5% tolerance over –40°C to +125°C - eliminates need for external resistor networks or calibration |
| Fixed 20ms minimum reset timeout | Guaranteed hold time after VCC recovery or MR release - ensures μP completes power stabilization before execution |
| Open-drain RESET output rated to 6V | Allows pullup to higher-voltage rails (e.g., 5V) while monitoring 2.6V supply - simplifies mixed-supply system reset coordination |
| Internal MR pullup resistor | 63kΩ typical - enables single-switch manual reset implementation without discrete pullup or debounce circuitry |
| Ultra-low quiescent current | 5μA at +25°C - extends battery life in portable instrumentation and remote sensors |
Applications
| Industrial Controllers | Battery-Powered Sensors |
|---|---|
Use Scenario: PLC I/O modules operating in harsh environments with fluctuating 3.3V or 2.5V rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during brownout or cold-start to prevent firmware corruption. Use Value: Guarantees clean μP restart under voltage sags as short as 35μs, with 20ms timeout ensuring stable clock lock before boot. | Use Scenario: Wireless environmental sensor nodes powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Low-current voltage monitor maintaining reset until VCC exceeds 2.63V and remains stable for ≥20ms. Use Value: 5μA ICC enables >10-year shelf life; open-drain RESET allows direct interface to 3.3V RF transceiver reset pin. |
| Medical Diagnostic Handhelds | Automotive Body Control Modules |
Use Scenario: Portable ultrasound units with dual 2.6V analog and 3.3V digital supplies. IC Role / Device Role / Timing Role: Single-supply monitor on main 2.6V rail, asserting reset to both domains via shared open-drain line. Use Value: Level-shifting capability eliminates isolation components; ±3.5% threshold tolerance meets IEC 60601-1 margin requirements. | Use Scenario: Interior lighting control units exposed to automotive load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Reset supervisor on 2.6V LDO output feeding microcontroller core logic. Use Value: Immunity to 100ns MR glitches and guaranteed reset assertion down to VCC = 1.0V prevents erratic behavior during cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US26D2+T | Bidirectional reset pin (supports μP-driven reset feedback); otherwise identical threshold and timeout | Required where microcontroller reset pin is bidirectional (e.g., some ARM Cortex-M variants) | Select MAX6314US26D2+T only if bidirectional reset signaling is explicitly needed; MAX6315US26D2+T is optimal for standard active-low reset inputs. |
| TPS3808G26DBVR | 2.63V threshold, 20ms timeout, but push-pull RESET output and 1.5μA typical ICC | Lacks open-drain level-shifting; requires same-rail pullup; lower ICC benefits ultra-low-power designs | Choose TPS3808G26DBVR when lowest possible current draw is critical and level-shifting is unnecessary; MAX6315US26D2+T preferred when interfacing across supply domains. |
Compared with MAX6314US26D2+T, MAX6315US26D2+T offers simpler unidirectional reset control and avoids potential contention on bidirectional pins; versus TPS3808G26DBVR, it trades 3.5μA higher ICC for essential open-drain flexibility in mixed-voltage systems.
Availability
MAX6315US26D2+T is available at Aetrix Electronics and suitable for industrial controllers, battery-powered sensors, medical handhelds, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US26D2+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.
The MAX6315 series was designed specifically for cost-sensitive, space-constrained μP supervisory applications demanding precision voltage monitoring, low power, and robust transient immunity in extended-temperature environments.
FAQ
What is the exact reset threshold voltage of the MAX6315US26D2+T?
The MAX6315US26D2+T has a factory-trimmed nominal reset threshold of 2.63V, with a tolerance of ±3.5% over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" with test conditions confirming its stability across temperature and supply variations.
Does the MAX6315US26D2+T support level-shifting for the RESET output?
Yes, the MAX6315US26D2+T features an open-drain RESET output that can be pulled up to any voltage between 0V and +6.0V - including voltages higher than its own VCC supply. This allows direct interface with 3.3V or 5V logic systems while monitoring a 2.6V rail, eliminating level translators in multi-supply designs.
What is the minimum reset timeout period for the MAX6315US26D2+T?
The MAX6315US26D2+T provides a minimum reset timeout period of 20ms, as confirmed in the Ordering Information and Electrical Characteristics tables. This guaranteed minimum ensures the reset signal remains asserted long enough for microprocessors to complete internal initialization and clock stabilization after power recovery or manual reset release.
Can the MR pin of the MAX6315US26D2+T be left floating?
No, the MR pin should not be left floating. The MAX6315US26D2+T includes an internal 63kΩ pullup resistor on MR, so it may be safely tied directly to VCC if manual reset functionality is unused. Leaving it unconnected risks noise coupling and unintended reset assertion; connecting to VCC ensures a defined high state and disables manual reset.
What is the maximum supply voltage the MAX6315US26D2+T can tolerate on VCC?
The MAX6315US26D2+T supports an absolute maximum VCC voltage of +6.0V, as stated in the Absolute Maximum Ratings table. However, its functional operating voltage range is specified from 1.0V to 5.5V. Operation above 5.5V is outside specification and may compromise reliability or parametric performance, even if within absolute limits.
MAX6315US26D2+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:
- Active
- 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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US26D2+T FAQ
1.How can I place an order for MAX6315US26D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US26D2+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 MAX6315US26D2+T reliable?
The price and inventory of MAX6315US26D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US26D2+T is usually 5 days.
3.What payment methods are accepted for MAX6315US26D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US26D2+T transactions.
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4.How is shipping managed for MAX6315US26D2+T?
MAX6315US26D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US26D2+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 MAX6315US26D2+T?
For technical support, including MAX6315US26D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US26D2+T requirements.
6.How does Aetrix verify that MAX6315US26D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US26D2+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 MAX6315US26D2+T meets industry standards.
7.What is the process for return or replacement of MAX6315US26D2+T?
All MAX6315US26D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US26D2+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 MAX6315US26D2+T part is unused and in its original packaging.
Return procedure for MAX6315US26D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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