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Analog Devices Inc./Maxim Integrated MAX6315US48D3
- Part No.:
- MAX6315US48D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US48D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:509
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Product details
Overview
MAX6315US48D3 from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an active-low open-drain RESET signal when voltage falls below 4.80V or upon manual reset assertion. It features a factory-trimmed 4.80V reset threshold, 140ms minimum reset timeout period, 5µA supply current, and operates across -40°C to +125°C. It is used in critical µP power monitoring for industrial controllers and portable equipment.
For engineers reviewing the MAX6315US48D3 datasheet, MAX6315US48D3 pinout, MAX6315US48D3 application, or MAX6315US48D3 equivalent, key selection criteria include its precise 4.80V reset threshold, 140ms timeout, SOT143 package compatibility, open-drain output supporting level-shifted pull-up, and immunity to short VCC transients.
Technical Context
The MAX6315US48D3 implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set a nominal 4.80V reset threshold (±3.5% over temperature), and an internal timer that guarantees RESET remains asserted for ≥140ms after VCC rises above threshold or MR deasserts. Its open-drain RESET output uses an n-channel MOSFET capable of sinking ≥1.2mA at VCC > 2.5V while allowing pull-up to voltages up to +6.0V.
MR input includes a 63kΩ internal pull-up resistor and accepts logic-low pulses ≥1µs wide to initiate reset; it rejects glitches <100ns and tolerates transients ≤1µs at 100mV overdrive. The device draws only 5µA typical supply current and maintains functional operation down to VCC = 1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.80V - Factory-trimmed reset threshold ensures accurate brownout detection at system VCC rail. |
| tRP Min | 140ms - Guarantees sufficient reset pulse width for reliable µP initialization after power recovery. |
| ICC Typ | 5µA - Enables ultra-low-power operation in battery-backed or energy-sensitive systems. |
| RESET Output | Open-drain - Allows level-shifting: pull-up to any voltage ≤6.0V, independent of VCC. |
| Operating Temp | -40°C to +125°C - Qualified for automotive under-hood, industrial control, and harsh-environment use. |
| VCC Range | 1.0V to 5.5V - Ensures valid reset assertion even during deep brownout conditions before full power-up. |
| MR Input | Internal 63kΩ pull-up - Eliminates external components; supports direct switch-to-GND manual reset. |
Pinout & Package
SOT143-4 package: 1.3mm × 2.9mm × 1.0mm body, surface-mount, lead-free compatible, tape-and-reel delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection. |
| 2 - RESET | Active-low open-drain output | Sinks current when asserted; requires external pull-up; supports voltage translation up to +6.0V. |
| 3 - MR | Manual reset input | Logic-low initiates reset; internally pulled up to VCC; immune to <100ns noise spikes. |
| 4 - VCC | Supply and monitor input | Powers device and provides monitored voltage source for reset threshold comparison. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed VTH | 4.80V ±3.5% over -40°C to +125°C - eliminates calibration, reduces BOM count, ensures consistent trip point. |
| Programmable tRP | 140ms minimum - prevents premature µP release during slow-rising or noisy power rails. |
| Open-drain RESET | Supports pull-up to 6.0V - enables reset signaling across mixed-voltage domains (e.g., 3.3V µP reset by 5V system). |
| Transient immunity | Rejects VCC glitches <1µs at 100mV overdrive - avoids spurious resets in electrically noisy environments. |
| Low ICC | 5µA typical - extends battery life in portable instrumentation and remote sensors without sacrificing supervision integrity. |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing and brownout protection in programmable logic controller CPU modules operating in factory-floor environments with fluctuating 24VDC supplies converted to 5V/3.3V rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET until monitored 5V rail stabilizes above 4.80V and holds for ≥140ms. Use Value: Prevents firmware corruption during line sags or switching transients; open-drain output interfaces directly to 3.3V µP reset pins via 10kΩ pull-up to 3.3V. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring guaranteed cold-start and low-power supervision during standby mode. IC Role / Device Role / Timing Role: Monitors main Li-ion-derived 4.8V supply rail; asserts RESET on discharge below 4.80V and sustains it for 140ms to ensure full µC reset. Use Value: 5µA quiescent current minimizes battery drain during multi-week standby; MR pin enables clinician-initiated reset without external circuitry. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Reset supervision for microcontrollers in under-dash BCMs exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Detects VCC dip below 4.80V during cranking; holds RESET active ≥140ms post-recovery to allow stable clock lock and register initialization. Use Value: -40°C to +125°C rating ensures operation across full automotive ambient range; 6.0V-tolerant RESET allows direct interface to 5V CAN transceiver reset lines. |
Use Scenario: Tamper-resistant metering ICs powered from isolated DC-DC converters with variable output due to input ripple. IC Role / Device Role / Timing Role: Provides precise 4.80V threshold monitoring of 5V auxiliary rail; debounced MR supports secure field-service reset. Use Value: Immunity to sub-µs transients prevents false resets from switching noise; SOT143 footprint saves space in compact meter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US48D2-T | Same 4.80V threshold but 20ms min timeout vs. 140ms | Not suitable where extended reset hold time is required for slow-rising rails or complex boot sequences | Select MAX6315US48D2-T only if system timing budget permits shorter reset assertion. |
| TLV803EC48DBZR | 4.8V threshold, 240ms min timeout, 1.8–6.0V VCC range, SOT-23-3 package | Lacks MR input and open-drain flexibility; RESET is push-pull, limiting voltage-domain interfacing | Choose TLV803EC48DBZR only for cost-sensitive, single-supply designs where MR and level-shifting are unnecessary. |
Compared with MAX6315US48D2-T, the MAX6315US48D3 provides 7× longer reset timeout for robustness in marginal power conditions; versus TLV803EC48DBZR, it retains manual reset capability and open-drain output essential for mixed-voltage system integration.
Availability
MAX6315US48D3 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and automotive body electronics requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +125°C operation.
Supply support for MAX6315US48D3 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 demanding industrial, automotive, and computing applications.
The MAX6315 family delivers highly accurate, low-power µP supervisory circuits with factory-trimmed thresholds and configurable timeouts-engineered specifically for reliable power-monitoring in safety-critical and battery-constrained systems.
FAQ
What is the exact reset threshold voltage for MAX6315US48D3?
The MAX6315US48D3 has a factory-trimmed nominal reset threshold of 4.80V, with tolerance of ±3.5% over the full -40°C to +125°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" for the D3 variant.
Does MAX6315US48D3 support manual reset functionality?
Yes, the MAX6315US48D3 includes a dedicated MR (Manual Reset) input (Pin 3). A logic-low signal on MR asserts RESET regardless of VCC level, and RESET remains active for the full 140ms timeout after MR returns high. An internal 63kΩ pull-up resistor allows MR to be left unconnected if unused.
Can the RESET output of MAX6315US48D3 be pulled up to a voltage higher than VCC?
Yes, the MAX6315US48D3 features an open-drain RESET output rated for up to +6.0V. This allows the output to be pulled up to a higher-voltage rail (e.g., 5V) while monitoring a lower VCC (e.g., 3.3V), enabling level-shifted reset signaling between different power domains in the same system.
What is the minimum reset timeout period for MAX6315US48D3?
The MAX6315US48D3 guarantees a minimum reset timeout period (tRP) of 140ms after VCC rises above the 4.80V threshold or after MR is deasserted. This duration is internally programmed and tested per device; typical values may exceed 140ms but are never less.
Is MAX6315US48D3 qualified for automotive applications?
Yes, the MAX6315US48D3 is specified for operation from -40°C to +125°C and packaged in a qualified SOT143-4 outline. While not AEC-Q100 certified out-of-box, its temperature rating, transient immunity, and reliability characteristics align with requirements for automotive body electronics such as BCMs and sensor modules.
MAX6315US48D3 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:
- 4.8V
- 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-23-4
MAX6315US48D3 FAQ
1.How can I place an order for MAX6315US48D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US48D3 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 MAX6315US48D3 reliable?
The price and inventory of MAX6315US48D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US48D3 is usually 5 days.
3.What payment methods are accepted for MAX6315US48D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US48D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US48D3?
MAX6315US48D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US48D3 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 MAX6315US48D3?
For technical support, including MAX6315US48D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US48D3 requirements.
6.How does Aetrix verify that MAX6315US48D3 is sourced from the original manufacturer or authorized distributors?
All MAX6315US48D3 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 MAX6315US48D3 meets industry standards.
7.What is the process for return or replacement of MAX6315US48D3?
All MAX6315US48D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US48D3, 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 MAX6315US48D3 part is unused and in its original packaging.
Return procedure for MAX6315US48D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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