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Analog Devices Inc./Maxim Integrated MAX6315US28D1+T
- Part No.:
- MAX6315US28D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US28D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
MAX6315US28D1+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 2.8V (±3.5% over -40°C to +125°C), with a 1ms minimum reset timeout period, 5μA supply current at 5.5V, and operation down to 1.0V. It serves as a system-level power-on reset and brownout detector in battery-powered microcontroller systems.
For engineers reviewing the MAX6315US28D1+T datasheet, MAX6315US28D1+T pinout, MAX6315US28D1+T application, or MAX6315US28D1+T equivalent, key selection criteria include factory-trimmed 2.8V reset threshold accuracy, guaranteed -40°C to +125°C operation, SOT23-4 package compatibility, and open-drain output capable of level-shifting above VCC up to +6V.
Technical Context
The MAX6315US28D1+T implements a precision bandgap-based voltage monitor with laser-trimmed resistive divider to set its 2.8V nominal reset threshold, with ±3.5% tolerance over full temperature range. Its internal timer generates a fixed 1ms minimum reset pulse width after VCC recovery or manual reset release.
It features an internally pulled-up MR input (63kΩ) accepting logic-low manual reset pulses ≥1μs, with 100ns glitch rejection and 500ns MR-to-RESET delay. The open-drain RESET output sinks ≥1.2mA at VCC > 2.5V with VOL ≤ 0.3V, supporting pullup to any supply ≤ +6V independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Reset Threshold | 2.8V ±3.5% over -40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature range |
| Reset Timeout Period | 1ms minimum - guarantees sufficient reset assertion time for microcontrollers requiring ≥1ms reset pulse | Supply Current | 5μA at VCC = 5.5V (-40°C to +85°C) - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and compatibility with 1.8V/2.5V/3.3V/5V systems |
| RESET Output Type | Open-drain n-channel MOSFET - allows level-shifting to higher-voltage reset domains (up to +6V) |
| MR Input Pullup | 63kΩ internal resistor - eliminates external components for manual reset implementation |
Pinout & Package
MAX6315US28D1+T is housed in a RoHS-compliant 4-pin SOT23 package (outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pullup to define high state; compatible with mixed-supply reset buses |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC; debounced internally - no external RC needed |
| VCC (Pin 4) | Supply and voltage monitor input | Powers device and provides monitored rail; internal divider compares against 2.8V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.8V threshold | Eliminates external resistor network and calibration, reducing BOM count and board space in cost-sensitive designs |
| 1ms minimum reset timeout | Meets minimum reset pulse width requirements of ARM Cortex-M0/M3, PIC, and 8051 microcontrollers without external timing components |
| Open-drain RESET with 6V absolute max rating | Enables interface to 5V or 3.3V reset domains from a 1.8V monitored rail - critical for mixed-voltage SoC systems |
| 63kΩ internal MR pullup | Supports direct switch-to-ground manual reset without external resistor, simplifying PCB layout and improving reliability |
| 5μA supply current at 5.5V | Extends battery runtime in always-on monitoring applications such as smart sensors and IoT edge nodes |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous environmental monitoring using coin-cell or Li-SOCl₂ battery with ultra-low quiescent current requirement. IC Role / Device Role / Timing Role: Power-on reset generator and brownout supervisor ensuring μC boots only when VCC ≥ 2.8V and holds reset for ≥1ms. Use Value: 5μA ICC enables >10-year battery life; 2.8V threshold matches typical cutoff voltage of primary lithium cells. | Use Scenario: DIN-rail mounted controller with 24V DC input, regulated down to 3.3V for MCU, subject to EMI-induced transients. IC Role / Device Role / Timing Role: Immune voltage supervisor detecting dips below 2.8V on 3.3V rail and asserting reset with 100ns glitch rejection. Use Value: Factory-trimmed threshold eliminates field calibration; SOT23 footprint saves space in dense I/O module layouts. |
| Medical Wearable Sensors | Automotive Body Control Modules |
Use Scenario: Patch-style ECG sensor powered by rechargeable Li-ion with strict size and leakage constraints. IC Role / Device Role / Timing Role: Single-chip reset supervisor monitoring regulated 1.8V core supply, asserting open-drain RESET to ARM Cortex-M0+. Use Value: Operates down to 1.0V VCC - ensures reset remains valid during deep discharge; 2.8V threshold guards against unsafe low-VDD operation. | Use Scenario: 12V automotive subsystem with local 5V/3.3V regulation exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: High-temp supervisory IC asserting reset during cranking-induced brownouts (VCC < 2.8V) across -40°C to +125°C. Use Value: Guaranteed performance over full AEC-Q100 Grade 0 temperature range; 1120ms timeout option available for extended hold times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US28D1+T | Bidirectional reset pin (supports μP-driven reset feedback); otherwise identical 2.8V/1ms spec | Required only when host microcontroller uses bidirectional reset pin (e.g., some Renesas RL78 variants) | Select MAX6314US28D1+T only if bidirectional reset signaling is explicitly required; otherwise MAX6315US28D1+T is simpler and lower-cost |
| TPS3808G12DBVR | Fixed 1.2V reset threshold; adjustable timeout via external capacitor; 1.5μA ICC | Used where lower threshold or programmable timeout is needed; not drop-in for 2.8V monitoring | Choose TPS3808G12DBVR only when system requires sub-2.5V reset detection or timeout customization; MAX6315US28D1+T offers tighter 2.8V accuracy and zero-component simplicity |
Compared with MAX6314US28D1+T, the MAX6315US28D1+T omits bidirectional reset capability but improves cost and reduces design complexity for unidirectional use cases; versus TPS3808G12DBVR, it delivers superior 2.8V threshold accuracy without external timing components, at the expense of timeout flexibility.
Availability
MAX6315US28D1+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial control modules, medical wearables, and automotive body electronics requiring stable component supply across extended temperature ranges.
Supply support for MAX6315US28D1+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.
The MAX6315 series is part of Analog Devices' precision voltage supervisor product line, engineered for reliable power-monitoring in space-constrained, low-power, and high-temperature embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6315US28D1+T and how does it vary with temperature?
The MAX6315US28D1+T has a nominal reset threshold of 2.8V, with ±3.5% tolerance over the full -40°C to +125°C operating range. Its tempco is 60ppm/°C, meaning threshold drift is bounded and predictable. This specification ensures consistent brownout detection across automotive and industrial environments without recalibration.
Does MAX6315US28D1+T require external components to function?
No, the MAX6315US28D1+T requires no external components for basic operation: its 2.8V threshold is factory-laser-trimmed, MR includes a 63kΩ internal pullup, and RESET is open-drain with defined VOL and leakage specs. Only an external pullup resistor on RESET is needed - typically 10kΩ - to establish the high state.
Can MAX6315US28D1+T's RESET output be pulled up to a voltage higher than its VCC supply?
Yes, the MAX6315US28D1+T's open-drain RESET output is rated for voltages up to +6.0V, allowing it to interface with higher-voltage reset domains (e.g., pulling up to 5V while monitoring a 3.3V or 1.8V VCC rail). This enables level-shifting in mixed-supply systems without additional logic.
What is the minimum VCC voltage at which MAX6315US28D1+T guarantees RESET assertion?
The MAX6315US28D1+T guarantees RESET remains asserted for VCC > 1.0V, per its Electrical Characteristics table. Below 1.0V, reset behavior is not specified - so system designers must ensure the monitored supply does not decay below this point before safe shutdown is complete.
Is MAX6315US28D1+T pin-compatible with other members of the MAX6315 family?
Yes, all MAX6315 variants - including MAX6315US28D1+T - share identical 4-pin SOT23 pinout (VCC, MR, RESET, GND) and electrical interface. Only the reset threshold (e.g., 2.8V vs. 3.0V) and timeout option (D1 = 1ms) differ between part numbers, enabling drop-in replacement within the same timeout group.
MAX6315US28D1+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:
- 2.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US28D1+T FAQ
1.How can I place an order for MAX6315US28D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US28D1+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 MAX6315US28D1+T reliable?
The price and inventory of MAX6315US28D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US28D1+T is usually 5 days.
3.What payment methods are accepted for MAX6315US28D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US28D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US28D1+T?
MAX6315US28D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US28D1+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 MAX6315US28D1+T?
For technical support, including MAX6315US28D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US28D1+T requirements.
6.How does Aetrix verify that MAX6315US28D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US28D1+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 MAX6315US28D1+T meets industry standards.
7.What is the process for return or replacement of MAX6315US28D1+T?
All MAX6315US28D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US28D1+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 MAX6315US28D1+T part is unused and in its original packaging.
Return procedure for MAX6315US28D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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