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Analog Devices Inc./Maxim Integrated MAX6315US30D3-T
- Part No.:
- MAX6315US30D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US30D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,457
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Product details
Overview
The MAX6315US30D3-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 3.00V or upon manual reset assertion. It features a factory-trimmed 3.00V reset threshold, 140ms minimum reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C. Used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6315US30D3-T datasheet, MAX6315US30D3-T pinout, MAX6315US30D3-T application, or MAX6315US30D3-T equivalent, key selection criteria include its precise 3.00V reset threshold, 140ms timeout (min), SOT23-4 package, open-drain RESET output compatible with voltages up to +6V, and guaranteed operation over extended temperature.
Technical Context
The MAX6315US30D3-T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider to set the 3.00V nominal reset threshold, with ±3.5% tolerance over -40°C to +125°C and 60ppm/°C tempco. Its internal monostable timer generates a fixed 140ms (min) reset pulse after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting - e.g., monitoring a 3.3V rail while pulling RESET up to 5V - and includes an internal 63kΩ pullup on MR. Immunity to short VCC transients is ensured via glitch rejection (100ns) and transient duration limits per comparator overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V nominal, ±3.5% over -40°C to +125°C - ensures reliable detection of 3.3V supply brownout before system malfunction. |
| Reset Timeout Period | 140ms minimum - guarantees sufficient hold time for microcontroller initialization after power recovery. |
| Supply Current | 5μA typical at +25°C, ≤15μA at +125°C - enables multi-year battery life in always-on portable systems. |
| Operating Voltage Range | 1.0V to 5.5V - supports operation down to near-dead battery voltage while maintaining reset assertion. |
| RESET Output Type | Open-drain, rated to 6.0V - allows pullup to higher voltage rail (e.g., 5V) while monitoring lower VCC (e.g., 3.3V), enabling cross-rail reset signaling. |
| MR Input Pullup | 63kΩ internal - eliminates external resistor for manual reset; supports direct switch-to-GND connection without debounce circuitry. |
Pinout & Package
Package: 4-pin SOT23 (U4+1), footprint per Analog Devices land pattern 90-0183, RoHS-compliant, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | System ground return path for internal comparator and timer; must be low-impedance for accurate threshold sensing. |
| RESET (Pin 2) | Active-low open-drain output | Drives microcontroller reset input low; requires external pullup (e.g., 10kΩ) to logic rail; can interface across voltage domains up to +6V. |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ; debounced by design; tolerant of 1μs pulses and immune to 100ns noise spikes. |
| VCC (Pin 4) | Supply and monitor input | Power source and monitored rail; internal divider senses voltage here; valid from 1.0V–5.5V; RESET asserted when VCC < 3.00V (±tolerance). |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 3.00V with ±3.5% tolerance over full temperature range - eliminates calibration components and ensures consistent brownout response across production units. |
| Guaranteed 140ms reset timeout (min) | Internally timed, no external capacitor required - ensures microcontroller reset hold time meets ARM Cortex-M or similar boot requirements without layout overhead. |
| Open-drain RESET output rated to +6V | Enables level-shifted reset signaling between disparate supply domains (e.g., 3.3V VCC monitoring with 5V RESET pullup) - simplifies mixed-voltage system design. |
| Internal MR pullup (63kΩ) | Removes need for external pullup resistor and associated BOM line item - reduces component count and PCB area in space-constrained portable designs. |
| Immunity to short VCC transients | 100ns glitch rejection and validated transient immunity curves - prevents spurious resets during switching noise or ESD events on power rails. |
Applications
| Battery-Powered Portable Instrumentation | Industrial Microcontroller-Based Controller |
|---|---|
Use Scenario: Handheld multimeter powered by two AA cells, requiring stable reset during battery voltage decay from 3.2V to 2.0V. IC Role / Device Role / Timing Role: Supervisory circuit monitoring VCC to assert RESET before microcontroller executes corrupted code due to undervoltage. Use Value: 3.00V threshold aligns with 3.3V system margin; 140ms timeout exceeds typical MCU boot sequence; 5μA ICC extends battery life beyond 5 years in sleep mode. | Use Scenario: Programmable logic controller (PLC) I/O module operating in factory environments with noisy 24V-derived 3.3V rails. IC Role / Device Role / Timing Role: Primary power supervisor ensuring deterministic reset on power-up, brownout, and manual service reset via front-panel button. Use Value: MR internal pullup eliminates external resistor; open-drain RESET interfaces cleanly with 5V FPGA reset domain; -40°C to +125°C rating matches industrial thermal envelope. |
| Medical Point-of-Care Diagnostic Device | Automotive Body Control Module (BCM) Subsystem |
Use Scenario: Portable glucose meter with USB charging and Li-ion battery, where firmware integrity must be guaranteed across charge/discharge cycles. IC Role / Device Role / Timing Role: Voltage supervisor enforcing safe boot condition before ADC and Bluetooth subsystem initialization. Use Value: 3.00V threshold avoids premature reset during Li-ion discharge knee (≈3.2V–3.0V); 140ms timeout accommodates USB enumeration delay before MCU firmware loads. | Use Scenario: Interior lighting control unit powered from vehicle battery (9V–16V), regulated to 3.3V, subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Brownout detector preventing erratic MCU behavior during engine cranking when 3.3V rail dips transiently. Use Value: Immunity to sub-100ns noise spikes and validated transient rejection curve prevent false resets; SOT23-4 footprint fits tight BCM board spacing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX811SEUS30D3+T | Pin-compatible, same 3.00V threshold and 140ms timeout, but higher 12μA ICC (typ) at +25°C and narrower -40°C to +85°C temp range. | Limited to commercial-temperature applications; less suitable for under-hood or industrial deployments requiring full -40°C to +125°C operation. | Select when cost sensitivity outweighs extended temperature need and higher quiescent current is acceptable. |
| TPS3808G30DBVR | 3.0V threshold, 200ms timeout (min), 1.6μA ICC (typ), but push-pull RESET output - cannot level-shift above VCC. | Requires same-rail RESET pullup; lacks cross-voltage-domain capability; better for ultra-low-power designs where level-shifting is unnecessary. | Select when lowest possible ICC is critical and reset signaling stays within one voltage domain. |
Compared with MAX811SEUS30D3+T, the MAX6315US30D3-T offers wider temperature support and lower ICC; versus TPS3808G30DBVR, it trades slightly higher current for essential open-drain flexibility in mixed-supply systems.
Availability
MAX6315US30D3-T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial controllers, medical diagnostics, and automotive body electronics requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6315US30D3-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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The MAX6315 series belongs to Analog Devices' supervisory IC product line, designed specifically for robust, low-power reset generation in microprocessor-based systems exposed to voltage instability, temperature extremes, and field-service reset requirements.
FAQ
What is the exact reset threshold voltage of the MAX6315US30D3-T?
The MAX6315US30D3-T has a factory-trimmed nominal reset threshold of 3.00V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table under "Reset Threshold (VTH)".
Does the MAX6315US30D3-T require an external pullup resistor on the RESET pin?
Yes, the MAX6315US30D3-T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor is recommended for most applications, connecting RESET to a logic rail (0V to +6V). The device itself does not provide internal pullup on RESET - only on the MR pin (63kΩ).
What is the minimum reset timeout period for the MAX6315US30D3-T?
The MAX6315US30D3-T provides a minimum reset timeout period of 140ms, as confirmed in the Ordering Information and Electrical Characteristics tables. This is the guaranteed minimum duration RESET remains asserted after VCC rises above 3.00V or after MR is deasserted.
Can the MAX6315US30D3-T monitor a 1.8V supply?
No - the MAX6315US30D3-T is factory-trimmed for a 3.00V reset threshold and is not configurable. While it operates with VCC as low as 1.0V, its reset comparator triggers only when VCC falls below 3.00V (±tolerance). For 1.8V monitoring, a different variant such as MAX6315US18D3-T would be required.
Is the MAX6315US30D3-T pin-compatible with the MAX811 series?
Yes, the MAX6315US30D3-T is explicitly stated as pin-compatible with the MAX811 in the Benefits and Features section. Both use identical SOT23-4 pinout (VCC, MR, RESET, GND) and share functional equivalence for reset supervision, though MAX6315 offers extended temperature range and lower ICC.
MAX6315US30D3-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:
- 3V
- 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
MAX6315US30D3-T FAQ
1.How can I place an order for MAX6315US30D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US30D3-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 MAX6315US30D3-T reliable?
The price and inventory of MAX6315US30D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US30D3-T is usually 5 days.
3.What payment methods are accepted for MAX6315US30D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US30D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US30D3-T?
MAX6315US30D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US30D3-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 MAX6315US30D3-T?
For technical support, including MAX6315US30D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US30D3-T requirements.
6.How does Aetrix verify that MAX6315US30D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US30D3-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 MAX6315US30D3-T meets industry standards.
7.What is the process for return or replacement of MAX6315US30D3-T?
All MAX6315US30D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US30D3-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 MAX6315US30D3-T part is unused and in its original packaging.
Return procedure for MAX6315US30D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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