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Analog Devices Inc./Maxim Integrated MAX6315US26D4
- Part No.:
- MAX6315US26D4
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US26D4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,482
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Product details
Overview
MAX6315US26D4 from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit in SOT143 package, designed to monitor VCC supply voltage and assert an open-drain active-low RESET signal when voltage falls below 2.63V or upon manual reset assertion. It features a factory-trimmed 2.63V reset threshold, 1120ms minimum reset timeout period, 5µA supply current at +25°C, and operates across -40°C to +85°C. It is used in portable/battery-powered equipment for reliable power-up and brownout protection.
For engineers reviewing the MAX6315US26D4 datasheet, MAX6315US26D4 pinout, MAX6315US26D4 application, or MAX6315US26D4 equivalent, this page provides verified technical context, exact pin functions, real-world use cases in battery-powered systems, and validated alternative parts with documented timing and threshold differences.
Technical Context
The MAX6315US26D4 implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set a nominal 2.63V reset threshold (±3.5% over temperature), paired with a monolithic timer that guarantees ≥1120ms reset assertion after VCC recovery or MR deassertion. Its open-drain RESET output supports level-shifting up to +6V independent of VCC.
It integrates a debounced manual reset input (MR) with 63kΩ internal pull-up, immune to transients ≤1µs at VTH–VCC = 20mV, and maintains functional reset assertion down to VCC = 1.0V. The device draws only 5µA typical supply current and requires no external components beyond a pull-up resistor on RESET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±3.5% over -40°C to +85°C - ensures reliable detection of brownout events near Li-ion discharge cutoff. |
| Reset Timeout Period | 1120ms minimum - guarantees µP reset hold time sufficient for full power stabilization in slow-ramping systems. |
| Supply Current | 5µA typical at +25°C - enables multi-year operation in coin-cell–powered devices without compromising supervision integrity. |
| RESET Output Type | Open-drain n-channel MOSFET - allows pull-up to any voltage ≤6V, enabling reset signaling across mixed-supply domains (e.g., 3.3V µP reset by 5V logic). |
| MR Input Behavior | Internal 63kΩ pull-up - eliminates need for external resistor; supports direct switch-to-GND connection with no debounce circuitry required. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable consumer environments without derating. |
| VCC Range | 2.5V to 5.5V - compatible with 2.7V–5.5V µP I/O rails and covers full discharge range of single-cell Li-ion (3.0–4.2V) and alkaline (1.0–1.5V × 2). |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.1mm footprint and 0.95mm height; lead-free and RoHS-compliant; tape-and-reel delivery only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for internal comparator and timer; must be connected directly to system ground plane for noise immunity. |
| 2 RESET | Active-low open-drain output | Asserts logic-low during reset; requires external pull-up (e.g., 10kΩ to 3.3V/5V); can interface across voltage domains up to +6V. |
| 3 MR | Manual reset input | Logic-low assertion triggers immediate reset; internally pulled up to VCC; tolerant of floating connection if unused. |
| 4 VCC | Supply and monitoring input | Powers internal circuitry and serves as monitored rail; voltage applied here sets reset threshold via internal trimmed divider. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.63V with ±3.5% tolerance over full temperature range - eliminates calibration overhead and ensures consistent trip point across production lots. |
| Guaranteed 1120ms reset timeout | Minimum duration ensures µP reset remains asserted long enough for power supplies, clocks, and PLLs to stabilize before code execution resumes. |
| Open-drain RESET with >VCC capability | Supports level-shifted reset signaling - e.g., monitoring a 3.3V rail while pulling RESET up to 5V logic, avoiding level translators. |
| 5µA quiescent current | Enables integration into always-on subsystems (e.g., RTC backup, wake-on-event circuits) without measurable battery drain impact. |
| Immunity to short VCC transients | Rejects glitches ≤1µs wide at 20mV overdrive - prevents spurious resets during switching noise or ESD-induced supply dips. |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered glucose meters and pulse oximeters operating from single Li-ion cells with deep-discharge cycling. IC Role / Device Role / Timing Role: Supervises VCC during battery depletion and cold-start; asserts RESET until voltage stabilizes above 2.63V post-charge or wake-up. Use Value: Prevents corrupted memory writes or sensor initialization errors during marginal supply conditions, extending usable battery life by validating true brownout vs. transient dip. |
Use Scenario: DIN-rail mounted I/O modules exposed to 24VDC field supply fluctuations and EMI in factory automation. IC Role / Device Role / Timing Role: Monitors local 3.3V logic rail derived from noisy 24V input; holds µC in reset during line sags or relay switching transients. Use Value: Eliminates watchdog timeouts and firmware crashes caused by sub-2.63V excursions lasting <1120ms, improving system uptime without software intervention. |
| Smart Energy Meters | Wearable Fitness Trackers |
|
Use Scenario: ANSI C12.20-compliant electricity meters with dual-supply architecture (mains + supercap backup) and strict reset timing requirements. IC Role / Device Role / Timing Role: Provides deterministic 1120ms reset hold on backup rail switchover; interfaces RESET to 5V metrology ASIC via open-drain pull-up. Use Value: Ensures metrology processor restarts cleanly after mains failure, meeting ANSI-specified minimum reset duration and eliminating measurement gaps. |
Use Scenario: Ultra-low-power wrist-worn devices using coin-cell batteries and aggressive sleep modes with sub-10µA average current. IC Role / Device Role / Timing Role: Supervises 2.8V regulated rail; asserts RESET during battery insertion or low-voltage wake-up, drawing only 5µA during sleep. Use Value: Guarantees safe boot sequence after cold start while contributing negligible load to battery budget - critical for >1-year shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US26D3-T | Same 2.63V threshold but 140ms min reset timeout (vs. 1120ms) | Suitable for fast-ramping supplies where shorter reset hold is acceptable | Select when system power stabilization completes within 140ms and longer timeout risks unnecessary delay in boot sequence. |
| TLV803EC26DBZR | 2.63V threshold, 240ms min timeout, push-pull RESET (not open-drain), 1.8–6V VCC range | Lacks >VCC level-shifting capability; requires same-rail pull-up | Choose when board space permits SOT-23-3 and system uses single-supply reset signaling without cross-rail interfacing needs. |
Compared with MAX6315US26D4, the MAX6315US26D3-T reduces reset hold time by 87.5% for faster boot in stable supplies, while TLV803EC26DBZR trades open-drain flexibility for smaller footprint and wider VCC range - neither offers identical 1120ms timing with >VCC RESET drive.
Availability
MAX6315US26D4 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart energy meters, and wearable fitness trackers requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX6315US26D4 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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration in harsh environments.
The MAX6315 family delivers precision voltage supervision with factory-trimmed thresholds and fixed timeout periods for cost-sensitive, space-constrained µP systems where external component count and layout area must be minimized.
FAQ
What is the exact reset threshold voltage and tolerance for MAX6315US26D4?
The MAX6315US26D4 has a nominal reset threshold of 2.63V, with a guaranteed tolerance of ±3.5% over the full operating temperature range of -40°C to +85°C. This value is factory-laser-trimmed and specified in the Electrical Characteristics table under "Reset Threshold (Note 1)" with test conditions confirming VTH – 3.5% to VTH + 3.5% across temperature. The MAX6315US26D4 does not require external calibration or adjustment.
Does MAX6315US26D4 support reset assertion when VCC drops below 1.0V?
Yes, the MAX6315US26D4 guarantees RESET remains asserted for VCC > 1.0V, per the Electrical Characteristics table. Below 1.0V, the internal circuitry may lose sink capability, but the device continues asserting RESET until VCC falls sufficiently to disable the output stage. The MAX6315US26D4 is explicitly characterized down to VCC = 1.0V for RESET functionality, ensuring robust behavior during deep brownout.
Can the RESET output of MAX6315US26D4 be pulled up to 5V while VCC is 3.3V?
Yes, the MAX6315US26D4's RESET pin is an open-drain output rated for voltages up to +6.0V, independent of VCC. When VCC = 3.3V, a 5V pull-up is fully supported and commonly used to interface with higher-voltage logic families. The datasheet confirms "RESET … can be pulled up to a voltage higher than VCC" and specifies ABSOLUTE MAXIMUM RATINGS for RESET as -0.3V to +6.0V - making 5V pull-up safe and functional for the MAX6315US26D4.
What is the minimum reset timeout period for MAX6315US26D4, and is it guaranteed over temperature?
The MAX6315US26D4 has a minimum reset timeout period of 1120ms, as confirmed in the Ordering Information table and Electrical Characteristics (tRP parameter). This value is guaranteed over the full -40°C to +85°C operating range, with Typical Operating Characteristics showing normalized tRP variation of ±0.6% across temperature - well within specification margin. The MAX6315US26D4 delivers deterministic timing without external RC components.
Is there an internal pull-up on the MR pin of MAX6315US26D4, and what is its value?
Yes, the MAX6315US26D4 includes an internal 63kΩ pull-up resistor on the MR pin, as stated in the Pin Description and Applications Information sections. This allows MR to be left unconnected (floating) when unused, simplifying design. If manual reset is needed, a momentary switch from MR to GND suffices - no external resistor is required. The MAX6315US26D4's MR input threshold is specified as VIL = 0.8V (max), ensuring reliable low-level detection.
MAX6315US26D4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- 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:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6315US26D4 FAQ
1.How can I place an order for MAX6315US26D4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US26D4 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 MAX6315US26D4 reliable?
The price and inventory of MAX6315US26D4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US26D4 is usually 5 days.
3.What payment methods are accepted for MAX6315US26D4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US26D4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US26D4?
MAX6315US26D4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US26D4 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 MAX6315US26D4?
For technical support, including MAX6315US26D4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US26D4 requirements.
6.How does Aetrix verify that MAX6315US26D4 is sourced from the original manufacturer or authorized distributors?
All MAX6315US26D4 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 MAX6315US26D4 meets industry standards.
7.What is the process for return or replacement of MAX6315US26D4?
All MAX6315US26D4 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US26D4, 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 MAX6315US26D4 part is unused and in its original packaging.
Return procedure for MAX6315US26D4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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