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Analog Devices Inc./Maxim Integrated MAX6315US25D1+
- Part No.:
- MAX6315US25D1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US25D1+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143
- Quantity:
- Payment:
- Shipping:
Inventory:4,019
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Product details
Overview
MAX6315US25D1+ from Maxim Integrated is a low-power, open-drain microprocessor reset supervisor IC that monitors VCC supply voltage and asserts an active-low RESET signal when VCC falls below 2.50V ±1.8% or when manual reset (MR) is asserted. It features a factory-trimmed 2.5V reset threshold, 1ms minimum reset timeout period, 5µA supply current at +25°C, and operates across -40°C to +125°C. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6315US25D1+ datasheet, MAX6315US25D1+ pinout, MAX6315US25D1+ application, or MAX6315US25D1+ equivalent, key selection criteria include its precise 2.5V reset threshold tolerance, guaranteed over-temperature performance, open-drain output capable of pull-up to voltages > VCC (up to +6V), immunity to short VCC transients, and SOT143 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6315US25D1+ implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set the 2.50V nominal reset threshold, with ±1.8% accuracy over temperature and ±60ppm/°C tempco. Its internal timer generates a fixed 1ms (min) reset timeout after VCC rises above threshold or MR deasserts.
It uses an open-drain n-channel MOSFET for the RESET output, enabling level-shifting across supplies (e.g., monitoring a 2.5V rail while pulling RESET up to 3.3V or 5V), and includes an internal 63kΩ pullup on MR - eliminating external components for manual reset functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V ±1.8% (factory-trimmed; ensures accurate brownout detection at 2.5V systems) |
| Reset Timeout Period | 1ms minimum (guarantees sufficient processor initialization time after power recovery) |
| Supply Current | 5µA at +25°C (enables ultra-low-power operation in battery-backed applications) |
| Operating Temperature | -40°C to +125°C (supports automotive under-hood and industrial environments) |
| RESET Output Type | Open-drain, rated to +6V (allows pull-up to higher-voltage rails for mixed-supply system reset coordination) |
| MR Input Pullup | 63kΩ internal resistor (eliminates need for external pullup; simplifies manual reset switch interface) |
| VCC Operating Range | 1.0V to 5.5V (functions down to 1V, ensuring reset assertion even during deep brownout) |
Pinout & Package
MAX6315US25D1+ is housed in a 4-pin SOT143 (also referenced as U4+1) surface-mount package, measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free finish (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | System ground return path for internal comparator and timer circuitry |
| 2 (RESET) | Active-low open-drain output | Sinks current when asserted; requires external pullup; supports voltage translation up to +6V |
| 3 (MR) | Manual reset input | Logic-low assertion forces RESET active; internally pulled up to VCC via 63kΩ resistor |
| 4 (VCC) | Supply and monitor input | Powers device and provides input to precision voltage divider for 2.50V threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed threshold | 2.50V ±1.8% over full temperature range eliminates calibration and reduces BOM count |
| Open-drain RESET with >VCC capability | Enables single reset line coordination across multiple voltage domains (e.g., 2.5V core + 3.3V I/O) |
| Internal MR pullup resistor | 63kΩ value allows direct connection of momentary switch to GND - no external components needed |
| Immunity to short VCC transients | Rejects glitches ≤1µs at 100mV overdrive - prevents spurious resets in noisy power environments |
| Guaranteed operation down to 1V VCC | Ensures RESET remains asserted through deep brownout until VCC recovers above 2.50V |
Applications
| Battery-Powered IoT Sensor Node | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: A wireless sensor node powered by a single Li-ion cell (2.7–4.2V) enters deep sleep between readings and must reliably restart upon wake-up or voltage sag. IC Role / Device Role / Timing Role: Supervisory reset controller asserting active-low RESET to the MCU during VCC drop below 2.5V or manual wake-up trigger. Use Value: The 2.50V threshold matches typical MCU minimum operating voltage; 1ms timeout ensures full core initialization before firmware execution begins. |
Use Scenario: An industrial digital I/O module operates in harsh environments where 24V DC supply ripple and transient coupling can cause localized 3.3V rail instability. IC Role / Device Role / Timing Role: Dedicated VCC monitor for the 3.3V logic rail, providing glitch-immune reset signaling to the local microcontroller. Use Value: Immunity to sub-microsecond transients prevents false resets; -40°C to +125°C rating ensures reliability in uncontrolled cabinet temperatures. |
| Medical Handheld Diagnostic Device | Automotive Body Control Module (BCM) Subsystem |
|
Use Scenario: A portable ultrasound probe with flash memory storage requires deterministic power-on reset sequencing to prevent data corruption during cold start. IC Role / Device Role / Timing Role: Primary reset supervisor generating synchronized RESET pulse after stable 2.5V supply is confirmed. Use Value: Open-drain output pulled up to 3.3V ensures compatible logic levels with flash interface; 5µA quiescent current extends battery life between charges. |
Use Scenario: A BCM subsystem powered from a 12V-to-2.5V buck converter experiences load-dump-induced dips on the 2.5V rail during vehicle cranking. IC Role / Device Role / Timing Role: Brownout detector for the 2.5V domain, asserting RESET to halt MCU operation until rail stabilizes above 2.50V. Use Value: Guaranteed operation to +125°C and ±1.8% threshold accuracy ensure robust response during engine bay thermal stress and voltage sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811TEUS25+T | Same SOT143 package, 2.5V threshold, but push-pull RESET output (not open-drain); 140ms timeout (not 1ms) | Requires same VCC for pullup; unsuitable for level-shifting; longer timeout may delay system boot | Select only if push-pull drive and longer reset hold time are required; not drop-in for open-drain or fast-reset use cases |
| TPS3808G125DBVR | 2.5V threshold, 20ms min timeout, open-drain output, but 1.5µA max ICC (lower than MAX6315US25D1+'s 5µA typical) | Higher accuracy (±0.5% vs ±1.8%), wider VCC range (0.8–6V), but no internal MR pullup - requires external resistor | Prefer for ultra-low-power or high-accuracy designs where external MR component is acceptable; not pin-compatible |
Compared with MAX811TEUS25+T and TPS3808G125DBVR, the MAX6315US25D1+ uniquely combines 1ms timeout, internal MR pullup, and open-drain >VCC capability in a single SOT143 footprint - making it optimal for compact, battery-sensitive, multi-rail reset coordination where minimal external parts and fast recovery are critical.
Availability
MAX6315US25D1+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial PLC modules, and automotive body control subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6315US25D1+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6315US25D1+ belongs to Maxim's µP supervisory circuit product line, designed specifically to replace discrete reset solutions with integrated, precision voltage monitoring and reset timing for resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6315US25D1+?
The MAX6315US25D1+ has a factory-trimmed nominal reset threshold of 2.50V, with a guaranteed tolerance of ±1.8% over the full operating temperature range (-40°C to +125°C). This specification is confirmed in the Electrical Characteristics table of the official datasheet, and the tempco is specified as ±60ppm/°C.
Does MAX6315US25D1+ require an external pullup resistor on the RESET pin?
Yes, the MAX6315US25D1+ features an open-drain RESET output and requires an external pullup resistor to establish a valid logic-high level. A 10kΩ resistor is recommended for most applications, and the pullup may connect to any voltage between 0V and +6V - including supplies higher than VCC - enabling level-shifted reset signaling.
Can MAX6315US25D1+ operate with VCC below 2.5V, and what happens to RESET?
Yes, the MAX6315US25D1+ functions down to VCC = 1.0V. When VCC drops below 2.50V, RESET is asserted (pulled low) and remains asserted as long as VCC stays below threshold. Even below 1V, RESET remains low until VCC decays fully - ensuring fail-safe behavior during deep brownout conditions.
Is there an internal pullup on the MR pin of MAX6315US25D1+, and what is its value?
Yes, the MAX6315US25D1+ includes an internal 63kΩ pullup resistor on the MR pin. This allows direct connection of a momentary switch from MR to GND without external components. If MR is unused, it can be left floating - the internal pullup ensures it remains logic-high and non-assertive.
What is the minimum reset timeout period for MAX6315US25D1+, and is it adjustable?
The MAX6315US25D1+ has a fixed minimum reset timeout period of 1ms, which is factory-programmed and not user-adjustable. This duration is guaranteed over temperature and ensures sufficient time for microprocessor core stabilization after power recovery or manual reset release.
MAX6315US25D1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US25D1+ FAQ
1.How can I place an order for MAX6315US25D1+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US25D1+ 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 MAX6315US25D1+ reliable?
The price and inventory of MAX6315US25D1+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US25D1+ is usually 5 days.
3.What payment methods are accepted for MAX6315US25D1+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US25D1+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US25D1+?
MAX6315US25D1+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US25D1+ 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 MAX6315US25D1+?
For technical support, including MAX6315US25D1+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US25D1+ requirements.
6.How does Aetrix verify that MAX6315US25D1+ is sourced from the original manufacturer or authorized distributors?
All MAX6315US25D1+ 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 MAX6315US25D1+ meets industry standards.
7.What is the process for return or replacement of MAX6315US25D1+?
All MAX6315US25D1+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US25D1+, 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 MAX6315US25D1+ part is unused and in its original packaging.
Return procedure for MAX6315US25D1+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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