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Analog Devices Inc./Maxim Integrated MAX6315US46D2+
- Part No.:
- MAX6315US46D2+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US46D2+.pdf
- Description:
- MAX6315 OPEN-DRAIN SOT MICROPROC
- Quantity:
- Payment:
- Shipping:
Inventory:3,792
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Product details
Overview
MAX6315US46D2+ from Maxim Integrated 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 4.63V or when manual reset (MR) is asserted. It features a factory-trimmed 4.63V 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 portable equipment and critical µP power monitoring where reliable brownout detection and manual reset are required.
For engineers reviewing the MAX6315US46D2+ datasheet, MAX6315US46D2+ pinout, MAX6315US46D2+ application, or MAX6315US46D2+ equivalent, key selection considerations include its SOT143 package, open-drain RESET output compatible with voltages up to +6V, immunity to short VCC transients, guaranteed operation over temperature, and compatibility with systems requiring precise 4.63V threshold supervision with 20ms reset hold time.
Technical Context
The MAX6315US46D2+ implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set a nominal 4.63V reset threshold, with ±1.8% tolerance over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 20ms (minimum) reset timeout after VCC rises above threshold or MR deasserts.
It uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting-e.g., monitoring a 4.63V rail while pulling RESET up to a separate 3.3V or 5V domain. The MR input includes a 63kΩ internal pull-up and accepts logic-low pulses ≥1µs to trigger reset, with 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±1.8% over –40°C to +125°C - ensures accurate brownout detection for 4.6V–4.7V supply rails. |
| Reset Timeout Period | 20ms minimum - guarantees sufficient reset assertion time for microcontrollers to complete power-up initialization. |
| Supply Current | 5µA typical at +25°C - enables use in battery-powered systems with multi-year standby life. |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and allows monitoring of supplies down to 1V. |
| RESET Output Type | Open-drain, rated to 6V - permits pull-up to higher-voltage domains (e.g., 5V RESET line while monitoring 3.3V VCC). |
| MR Input Threshold | VIL = 0.8V max, VIH = 0.3×VCC min - ensures robust noise margin and compatibility with standard logic families. |
| Temperature Range | –40°C to +125°C - qualified for automotive under-hood and industrial embedded applications. |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.1mm footprint and 0.95mm height; lead-free variant denoted by '+' suffix per ordering code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Primary return path for internal circuitry and RESET sink current; must be connected directly to system ground plane. |
| 2: RESET | Active-low open-drain output | Asserts logic-low during reset; requires external pull-up resistor (e.g., 10kΩ) to target supply (≤6V); sinks ≥1.2mA at VCC > 2.5V. |
| 3: MR | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC via 63kΩ resistor; debounced internally - no external RC needed. |
| 4: VCC | Supply and monitor input | Power source and monitored voltage rail; internal divider compares this node to trimmed threshold; functional down to 1.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed threshold | 4.63V with ±1.8% tolerance over full temperature range - eliminates calibration and external resistor networks. |
| Open-drain RESET with 6V rating | Enables level-shifted reset signaling between non-matching supply domains without additional translators. |
| Immunity to short VCC transients | Rejects glitches ≤100ns (at 1mV/µs slew) - prevents spurious resets during switching noise or ESD events. |
| Low quiescent current | 5µA typical - reduces load on battery or low-power LDOs in always-on monitoring circuits. |
| Guaranteed operation over temperature | Specified from –40°C to +125°C with validated timing and threshold performance - suitable for harsh environments. |
Applications
| Battery-Powered Portable Equipment | Critical Microcontroller Power Monitoring |
|---|---|
Use Scenario: Supervising Li-ion battery-powered handheld instruments during discharge cycles where VCC drops from 4.2V to 3.0V. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when VCC falls below 4.63V - preventing erratic µC operation during brownout. Use Value: Prevents firmware corruption and undefined state entry by ensuring clean reset before supply reaches unsafe levels. |
Use Scenario: Ensuring deterministic startup of automotive engine control units (ECUs) after ignition cycle. IC Role / Device Role / Timing Role: Primary reset generator with 20ms timeout - synchronizing µP release with stable 5V rail and peripheral readiness. Use Value: Guarantees µP remains held in reset until all power domains settle, eliminating race conditions in safety-critical boot sequences. |
| Industrial Controllers | Intelligent Test & Measurement Instruments |
Use Scenario: Monitoring 4.6V auxiliary supply in PLC I/O modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-temperature-stable supervisor with ±1.8% threshold accuracy - maintaining reset integrity from –40°C to +125°C. Use Value: Eliminates need for external trimming or compensation circuits, reducing BOM count and calibration labor. |
Use Scenario: Providing manual and power-fail reset in benchtop oscilloscopes with dual-domain logic (3.3V core, 5V interface). IC Role / Device Role / Timing Role: Open-drain RESET pulled up to 5V while monitoring 4.63V VCC - enabling cross-rail reset coordination. Use Value: Allows single reset signal to safely initialize both voltage domains without level translators or timing mismatches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US46D1+ | Same 4.63V threshold but 1ms reset timeout (vs. 20ms) | Used where fast µP release is required post-brownout; unsuitable for systems needing longer initialization windows | Select when shorter reset hold time aligns with µP datasheet requirements and faster recovery is prioritized |
| TLV803EB46DBZR | 4.63V threshold, 240ms timeout, SOT-23-3 package, push-pull output | Lacks manual reset input and open-drain flexibility; higher 12µA supply current; no MR pin | Choose only if board space is constrained and open-drain level shifting is unnecessary |
Compared with MAX6315US46D1+, the MAX6315US46D2+ provides 20× longer reset assertion for robust µP initialization; compared with TLV803EB46DBZR, it offers MR functionality, lower current, and open-drain versatility at the cost of one extra pin and slightly larger footprint.
Availability
MAX6315US46D2+ is available at Aetrix Electronics and suitable for battery-powered portable equipment, critical microcontroller power monitoring, and industrial controllers requiring stable component supply with guaranteed long-term availability and extended temperature support.
Supply support for MAX6315US46D2+ 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 precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX6315 family delivers highly accurate, low-power supervisory circuits for microprocessor reset generation, targeting applications demanding guaranteed reset behavior across extreme temperatures and noisy supply environments.
FAQ
What is the exact reset threshold voltage of the MAX6315US46D2+?
The MAX6315US46D2+ has a factory-trimmed nominal reset threshold of 4.63V, with a tolerance of ±1.8% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" with min/typ/max values referenced to the 4.63V nominal point.
Does the MAX6315US46D2+ support manual reset functionality?
Yes, the MAX6315US46D2+ includes a dedicated MR (manual reset) input on Pin 3. A logic-low pulse ≥1µs on MR asserts RESET regardless of VCC level. Reset remains active for the full 20ms timeout after MR returns high. An internal 63kΩ pull-up resistor allows MR to be left unconnected if unused, and no external debounce components are required.
Can the RESET output of the MAX6315US46D2+ be pulled up to a voltage higher than VCC?
Yes, the MAX6315US46D2+ features an open-drain RESET output rated to 6.0V, allowing it to be pulled up to any voltage between 0V and +6V - including supplies higher than VCC. This enables level-shifting applications, such as monitoring a 4.63V rail while driving a 5V reset line, without additional interface circuitry.
What is the minimum reset timeout period for the MAX6315US46D2+?
The MAX6315US46D2+ has a minimum reset timeout period of 20ms, as indicated by the "D2" suffix in its part number. This is the guaranteed minimum duration RESET remains asserted after VCC rises above 4.63V or after MR is deasserted. Typical values may exceed 20ms, and the parameter is characterized across temperature and voltage.
Is the MAX6315US46D2+ qualified for automotive or industrial temperature ranges?
Yes, the MAX6315US46D2+ is fully specified and tested for operation from –40°C to +125°C, meeting requirements for under-hood automotive and industrial embedded applications. Its electrical characteristics-including reset threshold accuracy, timeout period, and supply current-are guaranteed across this full range, with tempco limited to 60ppm/°C.
MAX6315US46D2+ 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:
- 4.63V
- 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-23-4
MAX6315US46D2+ FAQ
1.How can I place an order for MAX6315US46D2+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US46D2+ 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 MAX6315US46D2+ reliable?
The price and inventory of MAX6315US46D2+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US46D2+ is usually 5 days.
3.What payment methods are accepted for MAX6315US46D2+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US46D2+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US46D2+?
MAX6315US46D2+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US46D2+ 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 MAX6315US46D2+?
For technical support, including MAX6315US46D2+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US46D2+ requirements.
6.How does Aetrix verify that MAX6315US46D2+ is sourced from the original manufacturer or authorized distributors?
All MAX6315US46D2+ 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 MAX6315US46D2+ meets industry standards.
7.What is the process for return or replacement of MAX6315US46D2+?
All MAX6315US46D2+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US46D2+, 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 MAX6315US46D2+ part is unused and in its original packaging.
Return procedure for MAX6315US46D2+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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