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Analog Devices Inc./Maxim Integrated MAX6315US31D2+T
- Part No.:
- MAX6315US31D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US31D2+T.pdf
- Description:
- IC RESET CIRCUIT 3.08V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,110
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Product details
Overview
MAX6315US31D2+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 3.08V or when manual reset (MR) is asserted. It guarantees reset assertion for ≥20ms after recovery, draws only 5μA at 5.5V, and operates across –40°C to +125°C in a 4-pin SOT23 package - used in battery-powered controllers and industrial μP systems requiring reliable brownout protection.
For engineers reviewing the MAX6315US31D2+T datasheet, MAX6315US31D2+T pinout, MAX6315US31D2+T application, or MAX6315US31D2+T equivalent, this page delivers verified reset threshold (3.08V), timeout (20ms min), supply current (5μA), operating temperature (–40°C to +125°C), and SOT23 package details - all critical for embedded power-monitoring design validation and BOM selection.
Technical Context
The MAX6315US31D2+T implements a precision voltage-monitoring comparator with factory-trimmed resistive divider setting nominal VTH = 3.08V ±3.5% over –40°C to +125°C, and integrates a monostable timer that enforces ≥20ms reset timeout after VCC recovery or MR deassertion. Its open-drain RESET output supports level-shifting up to +6V independent of VCC.
It features internal 63kΩ MR pullup, 100ns MR glitch rejection, and immunity to transients ≤100ns at 100mV overdrive - enabling robust operation in noisy environments without external debounce. The device consumes ≤15μA at +125°C and maintains guaranteed reset assertion down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 3.08V ±3.5% over –40°C to +125°C - ensures reliable brownout detection for 3.3V systems with margin against supply droop |
| Reset Timeout Period | ≥20ms (min) - holds μP in reset long enough for stable clock and supply settling after power recovery |
| Supply Current | 5μA at 5.5V, +25°C; ≤15μA at +125°C - enables multi-year battery life in portable instrumentation |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| RESET Output Type | Open-drain n-channel MOSFET - allows pullup to 0–6V, enabling level-shifted reset signaling across mixed-supply domains |
| MR Input Logic | Active-low with 63kΩ internal pullup - eliminates external components for manual reset; 1μs minimum pulse width |
| VCC Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.8V–5V logic families |
Pinout & Package
MAX6315US31D2+T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 0.8mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-low open-drain output | Drives low during reset; requires external pullup (e.g., 10kΩ) to any supply ≤6V - enables cross-rail reset signaling |
| 3 (MR) | Manual reset input | Logic-low assertion forces immediate reset; internal 63kΩ pullup allows NC default; immune to <100ns noise glitches |
| 4 (VCC) | Supply and monitor input | Powers device and feeds internal voltage-divider; monitored continuously for threshold violation; valid from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 3.08V with ±3.5% tolerance over full temperature range - eliminates calibration and reduces BOM count vs. discrete resistor-divider solutions |
| Guaranteed minimum reset timeout | 20ms at –40°C to +125°C - ensures μP reset duration exceeds worst-case oscillator start-up and supply stabilization times |
| Open-drain RESET with >VCC capability | Supports pullup to 6V while VCC = 3.3V - enables direct interface to 5V μP reset inputs without level translators |
| Ultra-low quiescent current | 5μA typical at +25°C - extends battery runtime in always-on monitoring applications such as smart sensors and data loggers |
| Integrated MR pullup and glitch rejection | 63kΩ internal pullup + 100ns noise immunity - removes need for external R/C debounce network and saves board area |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Programmable logic controllers deployed in factory automation require deterministic reset behavior during line-voltage sags or backup-battery switchover. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 μP upon VCC dip below 3.08V, holding reset ≥20ms post-recovery. Use Value: Prevents corrupted firmware execution during transient brownouts; open-drain output interfaces directly to 3.3V μP reset pin with 10kΩ pullup to same rail. |
Use Scenario: Remote environmental sensors powered by coin-cell batteries operate unattended for years and must survive cold-temperature voltage droop. IC Role / Device Role / Timing Role: Monitors 3.0V LDO output feeding MSP430 MCU; asserts RESET if battery voltage decays below 3.08V threshold. Use Value: 5μA supply current minimizes standby drain; guaranteed operation down to –40°C ensures reliability in outdoor deployments. |
| Medical Infusion Pumps | Automotive Body Control Modules |
Use Scenario: Life-critical infusion pumps use dual-supply architectures where main and backup rails must coordinate safe shutdown and restart. IC Role / Device Role / Timing Role: Resets safety-critical PIC18F μC when primary 3.3V rail falls below 3.08V; RESET pulled up to isolated 5V safety domain. Use Value: Open-drain architecture enables level-shifted reset assertion across isolation barriers without additional components. |
Use Scenario: Under-hood BCMs experience wide thermal swings and load-dump transients; reset circuit must avoid false triggers. IC Role / Device Role / Timing Role: Supervises 5V system rail in CAN-connected module; rejects <100ns MR glitches and tolerates 100mV VCC dips ≤100ns. Use Value: –40°C to +125°C rating and 3.5% VTH tolerance ensure consistent reset timing across engine bay temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US31D2+T | Bidirectional reset pin (supports μP-driven reset feedback); otherwise identical VTH (3.08V) and tRP (20ms) | Required only when μP reset pin is bidirectional and must drive reset back into supervisor | Select MAX6314US31D2+T only if interfacing with microcontrollers like STM32L4 that assert reset onto shared reset bus |
| TPS3808G30DBVR | Fixed 3.0V threshold (not 3.08V); 20ms timeout; 1.8–6.0V VCC range; push-pull RESET output (not open-drain) | Lacks level-shifting capability; requires same-rail pullup; slightly tighter VTH tolerance (±0.5%) but narrower temp range (–40°C to +125°C same) | Choose TPS3808G30DBVR when push-pull output suffices and exact 3.08V threshold is noncritical |
Compared with MAX6315US31D2+T, the MAX6314US31D2+T adds bidirectional reset support at identical cost and footprint, while the TPS3808G30DBVR trades open-drain flexibility for tighter threshold accuracy and push-pull simplicity - both require layout review due to differing RESET drive architecture.
Availability
MAX6315US31D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical infusion pumps, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US31D2+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 low-power, high-reliability power-supply supervision in space- and energy-constrained embedded systems - emphasizing precision threshold stability, ultra-low ICC, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6315US31D2+T?
The MAX6315US31D2+T has a nominal reset threshold voltage of 3.08V, with tolerance of ±3.5% over the full operating temperature range of –40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the official Analog Devices datasheet. The MAX6315US31D2+T uses laser-trimmed internal resistors to achieve this precision without external components.
Does the MAX6315US31D2+T support operation below 1.8V?
Yes, the MAX6315US31D2+T operates with VCC as low as 1.0V, and guarantees RESET assertion down to that level. Its functional VCC range is 1.0V to 5.5V, making it compatible with 1.2V, 1.8V, 2.5V, 3.3V, and 5V systems. The MAX6315US31D2+T maintains valid reset behavior even during deep brownout conditions where other supervisors may release prematurely.
Can the RESET output of the MAX6315US31D2+T be pulled up to a voltage higher than VCC?
Yes, the MAX6315US31D2+T features an open-drain RESET output rated for voltages up to +6.0V, regardless of VCC level. This allows the RESET signal to be pulled up to a higher rail (e.g., 5V) while VCC is at 3.3V - enabling level-shifted reset signaling between different power domains. The MAX6315US31D2+T datasheet explicitly confirms this capability in both Absolute Maximum Ratings and Pin Description sections.
What is the minimum reset timeout period for the MAX6315US31D2+T?
The MAX6315US31D2+T has a minimum reset timeout period of 20ms, guaranteed over the full temperature range of –40°C to +125°C. This value is fixed per the "D2" suffix and confirmed in the Ordering Information and Electrical Characteristics tables. The MAX6315US31D2+T uses an internal monostable timer to enforce this duration after VCC rises above 3.08V or after MR is released.
Is external debounce required for the manual reset (MR) input on the MAX6315US31D2+T?
No, external debounce is not required for the MR input of the MAX6315US31D2+T. It includes an internal 63kΩ pullup resistor and provides 100ns glitch rejection, allowing direct connection of a momentary switch from MR to GND. The MAX6315US31D2+T datasheet states that external RC filtering is optional and only recommended in exceptionally noisy environments or with long cable runs.
MAX6315US31D2+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:
- 3.08V
- 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
MAX6315US31D2+T FAQ
1.How can I place an order for MAX6315US31D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US31D2+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 MAX6315US31D2+T reliable?
The price and inventory of MAX6315US31D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US31D2+T is usually 5 days.
3.What payment methods are accepted for MAX6315US31D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US31D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US31D2+T?
MAX6315US31D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US31D2+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 MAX6315US31D2+T?
For technical support, including MAX6315US31D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US31D2+T requirements.
6.How does Aetrix verify that MAX6315US31D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US31D2+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 MAX6315US31D2+T meets industry standards.
7.What is the process for return or replacement of MAX6315US31D2+T?
All MAX6315US31D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US31D2+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 MAX6315US31D2+T part is unused and in its original packaging.
Return procedure for MAX6315US31D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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