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Analog Devices Inc./Maxim Integrated MAX6315US29D2+T
- Part No.:
- MAX6315US29D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US29D2+T.pdf
- Description:
- IC RESET CIRCUIT 2.93V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,691
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Product details
Overview
MAX6315US29D2+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 guarantees reset assertion for ≥20ms after recovery, draws only 5μA at 5.5V, operates from -40°C to +125°C, and uses a 4-pin SOT23 package for space-constrained embedded power monitoring.
For engineers reviewing the MAX6315US29D2+T datasheet, MAX6315US29D2+T pinout, MAX6315US29D2+T application, or MAX6315US29D2+T equivalent, this page delivers verified electrical parameters, temperature-stable reset threshold accuracy (±3.5% over -40°C to +125°C), MR glitch rejection (100ns), open-drain level-shifting capability (RESET pullup to ≤6V), and factory-trimmed 20ms timeout - all critical for reliable brownout detection in battery-powered controllers.
Technical Context
The MAX6315US29D2+T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting nominal VTH = 2.93V, and an internal monostable timer generating a guaranteed minimum 20ms reset timeout period after VCC recovery or MR release. Its open-drain RESET output uses an n-channel MOSFET capable of sinking 3.2mA while maintaining VOL ≤ 0.4V at VCC > 4.25V.
MR input includes a 63kΩ internal pullup resistor, accepts logic-low pulses as short as 1μs, and rejects transients ≤100ns. The device is immune to VCC glitches down to 35μs duration when overdriven by ≥20mV below VTH, and maintains functional operation across 1.0V–5.5V VCC range with guaranteed reset assertion down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 2.93V ±3.5% over full temperature range - ensures accurate brownout detection for 3.0V systems |
| tRP Min | 20ms - guarantees sufficient reset hold time for μP initialization in noisy industrial environments |
| ICC | 5μA at VCC = 5.5V - enables multi-year battery life in portable equipment |
| RESET Output | Open-drain, sinks 3.2mA at VCC > 4.25V with VOL ≤ 0.4V - supports level-shifted reset to higher-voltage domains |
| MR Input | Internal 63kΩ pullup, 1μs min pulse width, 100ns glitch rejection - eliminates external components for manual reset |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| VCC Range | 1.0V to 5.5V - allows use with Li-ion, 3.3V, and 5V rails without external regulation |
Pinout & Package
MAX6315US29D2+T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1, outline 21-0052), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and standard 0.95mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal comparator and timer; must be low-impedance connection to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pullup (e.g., 10kΩ) to any supply ≤6V for level shifting |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC; debounced via 100ns glitch filter - no external RC needed |
| VCC (Pin 4) | Supply and monitor input | Powers device and provides monitored voltage; internal laser-trimmed divider sets 2.93V reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed VTH | 2.93V with ±3.5% tolerance over -40°C to +125°C - eliminates calibration and improves system-level voltage margin predictability |
| Guaranteed 20ms reset timeout | Minimum tRP = 20ms across full temperature and voltage range - ensures μP reset meets JEDEC JESD78 latch-up immunity requirements |
| Open-drain RESET with 6V tolerance | Allows pullup to separate supply (e.g., 5V) while monitoring 3.3V rail - enables clean reset sequencing across mixed-voltage SoC designs |
| Integrated MR pullup and filtering | 63kΩ internal pullup + 100ns glitch rejection - removes need for external resistor/capacitor, saving BOM cost and PCB area |
| Ultra-low ICC = 5μA | Enables always-on supervision in energy-harvesting and coin-cell-powered devices without compromising battery lifetime |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental sensor nodes powered by CR2032 coin cells, requiring reliable power-on reset and brownout recovery during temperature-induced voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0+ MCU until VCC stabilizes above 2.93V, then holding reset for ≥20ms. Use Value: 5μA quiescent current extends battery life beyond 5 years; open-drain output allows RESET pullup to same 3.3V rail, eliminating extra LDO. | Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V DC input and 3.3V logic domain, subject to EMI-induced VCC dips on field-side power rails. IC Role / Device Role / Timing Role: Voltage monitor on 3.3V logic supply; asserts RESET during brownouts and recovers only after stable 20ms window - preventing spurious firmware execution. Use Value: ±3.5% VTH tolerance ensures consistent trip point across -40°C to +70°C operating range; MR pin enables field-service reset via front-panel button. |
| Automotive Body Control Modules | Medical Infusion Pump Controllers |
Use Scenario: Under-hood BCM exposed to 125°C ambient, powered from switched 5V rail derived from vehicle battery, requiring AEC-Q100-comparable reliability. IC Role / Device Role / Timing Role: Monitors 5V supply feeding microcontroller; triggers RESET if voltage drops below 2.93V during cold-crank or load-dump events. Use Value: Guaranteed operation to +125°C and 1.0V–5.5V VCC range accommodates wide automotive input transients; 35μs VCC fall-time immunity prevents false resets. | Use Scenario: UL-certified infusion pump with dual-redundant MCU architecture, where deterministic reset timing is required for safety-critical firmware boot validation. IC Role / Device Role / Timing Role: Primary reset supervisor for main ARM-based controller; generates precise 20ms minimum reset pulse synchronized to VCC recovery. Use Value: Factory-trimmed 2.93V threshold matches 3.0V system margin; 20ms tRP satisfies IEC 62304 Class C software boot timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US29D2+T | Bidirectional reset pin (supports μP-driven reset feedback); otherwise identical VTH, tRP, and package | Required only when target μP has bidirectional reset I/O (e.g., certain PIC or STM32 variants) | Select MAX6314US29D2+T only if bidirectional reset signaling is explicitly needed; MAX6315US29D2+T is preferred for standard unidirectional reset architectures. |
| TPS3808G29DBVR | Fixed 2.93V threshold, 20ms timeout, but push-pull RESET output (not open-drain); 1.8V–6.0V VCC range | Lacks level-shifting capability; requires RESET pullup to same supply as VCC - unsuitable for mixed-voltage reset sequencing | Choose TPS3808G29DBVR only in single-rail systems where push-pull drive simplifies layout; MAX6315US29D2+T remains superior for multi-supply isolation. |
Compared with MAX6314US29D2+T and TPS3808G29DBVR, the MAX6315US29D2+T uniquely combines open-drain level-shifting, ultra-low 5μA ICC, and guaranteed 20ms timeout across -40°C to +125°C - making it optimal for battery-powered and mixed-voltage industrial controllers where reset flexibility and power efficiency are primary constraints.
Availability
MAX6315US29D2+T is available at Aetrix Electronics and suitable for battery-powered data loggers, industrial PLC I/O modules, and automotive body control modules requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX6315US29D2+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 belongs to Analog Devices' precision supervisory IC product line, engineered specifically for low-power, high-accuracy voltage monitoring and reset generation in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage for MAX6315US29D2+T?
The MAX6315US29D2+T features a factory-trimmed nominal reset threshold voltage of 2.93V, with tolerance of ±3.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" - ensuring consistent brownout detection for 3.0V systems without external calibration.
Does MAX6315US29D2+T support level shifting on its RESET output?
Yes, the MAX6315US29D2+T has an open-drain RESET output rated for voltages up to +6.0V, allowing it to be pulled up to a supply voltage higher than its own VCC. For example, when monitoring a 3.3V rail (VCC = 3.3V), RESET can be pulled up to 5.0V - enabling safe reset signaling across mixed-voltage domains without additional level translators.
What is the minimum reset timeout period for MAX6315US29D2+T?
The MAX6315US29D2+T guarantees a minimum reset timeout period (tRP) of 20ms after VCC rises above 2.93V or after the MR input is released. This value is validated across -40°C to +125°C and appears in the Ordering Information table as "D2" suffix - providing sufficient hold time for reliable microprocessor initialization in demanding industrial environments.
Can the MR pin of MAX6315US29D2+T be left floating?
Yes, the MR pin of MAX6315US29D2+T includes an internal 63kΩ pullup resistor to VCC, so it may be left unconnected if manual reset functionality is not required. When used, a normally open momentary switch between MR and GND provides clean reset initiation; no external debounce components are needed due to built-in 100ns glitch rejection.
What is the supply current consumption of MAX6315US29D2+T at 5.5V?
The MAX6315US29D2+T draws only 5μA typical supply current (ICC) at VCC = 5.5V and TA = -40°C to +85°C, rising to 15μA maximum at +125°C. This ultra-low quiescent current makes the MAX6315US29D2+T ideal for always-on supervision in battery-powered applications such as portable medical devices and remote sensors.
MAX6315US29D2+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:
- 2.93V
- 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
MAX6315US29D2+T FAQ
1.How can I place an order for MAX6315US29D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US29D2+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 MAX6315US29D2+T reliable?
The price and inventory of MAX6315US29D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US29D2+T is usually 5 days.
3.What payment methods are accepted for MAX6315US29D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US29D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US29D2+T?
MAX6315US29D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US29D2+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 MAX6315US29D2+T?
For technical support, including MAX6315US29D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US29D2+T requirements.
6.How does Aetrix verify that MAX6315US29D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US29D2+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 MAX6315US29D2+T meets industry standards.
7.What is the process for return or replacement of MAX6315US29D2+T?
All MAX6315US29D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US29D2+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 MAX6315US29D2+T part is unused and in its original packaging.
Return procedure for MAX6315US29D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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