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Analog Devices Inc./Maxim Integrated MAX6315US29D1-T
- Part No.:
- MAX6315US29D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US29D1-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,113
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Product details
Overview
MAX6315US29D1-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 2.93V or when manual reset (MR) is asserted. It features a factory-trimmed 2.93V reset threshold, 1ms minimum reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C for use in battery-powered microcontroller systems.
For engineers reviewing the MAX6315US29D1-T datasheet, MAX6315US29D1-T pinout, MAX6315US29D1-T application, or MAX6315US29D1-T equivalent, this device delivers precision power-supply monitoring with immunity to short VCC transients, open-drain level-shifting capability up to +6V, and guaranteed operation over full industrial temperature range - critical for reliable reset control in space-constrained embedded designs.
Technical Context
The MAX6315US29D1-T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider to set its 2.93V nominal reset threshold, with ±3.5% tolerance over -40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 1ms (min) reset timeout after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET for RESET output, enabling pull-up to any voltage ≤+6V - including supplies higher than VCC - and includes an internal 63kΩ MR pullup resistor. Immunity to sub-100ns glitches and operation down to VCC = 1.0V ensure robustness during brownout and power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal, ±3.5% over -40°C to +125°C - ensures accurate brownout detection for 3V systems |
| Reset Timeout Period | 1ms minimum - guarantees sufficient processor initialization time after power stabilization |
| Supply Current | 5μA typical at +25°C, ≤15μA at +125°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 1.2V–5V logic domains |
| RESET Output Type | Open-drain, rated to sink 3.2mA at VCC > 4.25V - allows level-shifting and wired-OR reset bus configurations |
| MR Input Threshold | VIL = 0.3×VCC / VIH = 0.7×VCC (VTH < 4.0V) - ensures noise-immune manual reset triggering across supply range |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial, and extended-environment applications |
Pinout & Package
Package: 4-pin SOT23 (U4+1), footprint compatible with JEDEC MO-178AB, 1.3mm × 2.9mm body size, 0.95mm height.
| 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 to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Drives microcontroller reset input low; requires external pullup (e.g., 10kΩ) to target supply (≤+6V) |
| MR (Pin 3) | Manual reset input | Logic-low assertion triggers immediate reset; internal 63kΩ pullup allows floating if unused |
| VCC (Pin 4) | Supply and monitor input | Power source and monitored voltage rail; internal divider compares against 2.93V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 2.93V with ±3.5% tolerance over full temperature range - eliminates calibration components and improves system reliability |
| Four selectable timeout periods | 1ms minimum timeout (D1 variant) - matches fast-boot microcontrollers without unnecessary delay |
| Open-drain RESET output | Supports pull-up to voltages up to +6V - enables reset signaling across mixed-voltage domains (e.g., 3.3V MCU controlled by 5V supervisor) |
| Immunity to short VCC transients | Rejects glitches <100ns wide - prevents spurious resets during switching noise or ESD events |
| Low quiescent current | 5μA typical at +25°C - extends battery runtime in always-on IoT sensors and wearables |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power supervision in DIN-rail mounted programmable logic controllers exposed to wide ambient temperature swings and noisy 24V DC rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting RESET during brownout on 3.3V logic supply derived from 24V input, ensuring deterministic controller restart. Use Value: 2.93V threshold precisely targets 3.3V rail dropout margin; -40°C to +125°C rating ensures operation inside enclosures with no forced cooling. | Use Scenario: Battery-powered vital-sign monitors requiring multi-year operation on coin-cell batteries with strict power budget constraints. IC Role / Device Role / Timing Role: Low-current (5μA) reset supervisor monitoring main 3V supply, initiating controlled shutdown and wake-up sequence. Use Value: Sub-μA quiescent current preserves battery capacity; 1ms timeout enables rapid sensor reinitialization without perceptible delay. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Reset management in under-dash modules subjected to cold-crank (4.5V) and load-dump (40V) transients on 12V supply networks. IC Role / Device Role / Timing Role: Monitoring 3.3V domain derived from automotive-grade DC/DC converter; asserting RESET during cold-crank-induced brownout. Use Value: Immunity to <100ns transients prevents false resets during ignition; 125°C rating supports placement near heat-generating power stages. | Use Scenario: Tamper-resistant electricity meters deployed in outdoor utility cabinets with wide seasonal temperature variation and long field lifetime requirements. IC Role / Device Role / Timing Role: Ensuring reliable microcontroller reset during AC line sags or backup capacitor discharge events on 3.3V rail. Use Value: Factory-trimmed 2.93V threshold provides consistent trip point across 15+ year lifespan; RoHS-compliant SOT23 package meets environmental compliance mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US29D1-T | Bidirectional reset pin support; identical 2.93V threshold and 1ms timeout; same SOT23 package | Required for μCs with bidirectional reset I/O (e.g., certain ARM Cortex-M series) | Select MAX6314US29D1-T only if the host microcontroller uses a shared reset/debug pin requiring bidirectional drive capability |
| TPS3808G12DBVR | 1.2V fixed threshold (not adjustable); 2.5ms min timeout; 1.5μA typical ICC; same SOT23-4 package | Suitable for ultra-low-power 1.2V/1.8V logic domains but not direct replacement for 2.93V monitoring | Choose TPS3808G12DBVR only when system VCC is ≤1.8V and lower supply current is prioritized over threshold accuracy |
Compared with MAX6314US29D1-T, the MAX6315US29D1-T lacks bidirectional reset support but offers tighter threshold tolerance and broader temperature qualification; versus TPS3808G12DBVR, it provides precise 2.93V detection essential for 3V systems but consumes slightly more current - making it optimal for industrial and automotive 3.3V applications where accuracy and ruggedness outweigh minimal current savings.
Availability
MAX6315US29D1-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US29D1-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 belongs to Analog Devices' precision supervisory IC product line, engineered for reliable power-up/power-down sequencing and brownout protection in mission-critical embedded systems operating under harsh thermal and electrical conditions.
FAQ
What is the exact reset threshold voltage of the MAX6315US29D1-T?
The MAX6315US29D1-T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±3.5% over the full -40°C to +125°C operating temperature range. This value is laser-trimmed during manufacturing and specified in the Ordering Information table of the official datasheet. The MAX6315US29D1-T does not require external resistor networks to set this threshold - it is fixed and calibrated at wafer test.
Does the MAX6315US29D1-T support reset timeout periods other than 1ms?
No - the "D1" suffix in MAX6315US29D1-T explicitly denotes the 1ms minimum reset timeout period. Other variants such as MAX6315US29D2-T (20ms), MAX6315US29D3-T (140ms), and MAX6315US29D4-T (1120ms) offer different timeouts, but the MAX6315US29D1-T is strictly configured for 1ms (min). This is confirmed in both the Electrical Characteristics table and the Ordering Information section of the datasheet.
Can the RESET output of the MAX6315US29D1-T be pulled up to a voltage higher than its VCC supply?
Yes - the MAX6315US29D1-T features an open-drain RESET output rated for voltages up to +6.0V, independent of VCC. This allows the RESET signal to interface with higher-voltage logic domains (e.g., pulling up to 5V while VCC = 3.3V), enabling level-shifting in mixed-supply systems. The datasheet specifies RESET output voltage limits as -0.3V to +6.0V, confirming safe operation beyond VCC.
Is the MAX6315US29D1-T pin-compatible with the MAX811 series?
Yes - the MAX6315US29D1-T is explicitly stated in its Benefits and Features section to be pin-compatible with the MAX811 family. Both devices use the same 4-pin SOT23 package with identical pinout (VCC, MR, RESET, GND) and share compatible electrical characteristics including open-drain RESET output, manual reset input with internal pullup, and similar supply current. However, the MAX6315US29D1-T offers tighter threshold tolerance and extended temperature range compared to standard MAX811 variants.
What is the maximum allowable VCC slew rate for reliable operation of the MAX6315US29D1-T?
The MAX6315US29D1-T specifies a maximum VCC slew rate of 100V/μs in its Absolute Maximum Ratings. Exceeding this rate may cause internal node stress or timing uncertainty in reset assertion/deassertion. For normal operation, the datasheet recommends using a 0.1μF bypass capacitor close to the VCC pin to suppress high-frequency transients and maintain stable monitoring - especially important in switch-mode power supply environments where fast edges occur.
MAX6315US29D1-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:
- 2.93V
- 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
MAX6315US29D1-T FAQ
1.How can I place an order for MAX6315US29D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US29D1-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 MAX6315US29D1-T reliable?
The price and inventory of MAX6315US29D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US29D1-T is usually 5 days.
3.What payment methods are accepted for MAX6315US29D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US29D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US29D1-T?
MAX6315US29D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US29D1-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 MAX6315US29D1-T?
For technical support, including MAX6315US29D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US29D1-T requirements.
6.How does Aetrix verify that MAX6315US29D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US29D1-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 MAX6315US29D1-T meets industry standards.
7.What is the process for return or replacement of MAX6315US29D1-T?
All MAX6315US29D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US29D1-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 MAX6315US29D1-T part is unused and in its original packaging.
Return procedure for MAX6315US29D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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