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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 RESET CIRCUIT 2.93V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:823
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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 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 instrumentation and industrial controllers.
For engineers reviewing the MAX6315US29D1+T datasheet, MAX6315US29D1+T pinout, MAX6315US29D1+T application, or MAX6315US29D1+T equivalent, key selection criteria include its SOT23-4 open-drain reset output, guaranteed operation down to VCC = 1.0V, immunity to short VCC transients ≤100ns, and compatibility with systems requiring level-shifted reset signaling across multiple supply domains.
Technical Context
The MAX6315US29D1+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set a nominal 2.93V 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 the RESET output, enabling pull-up to any voltage between 0V and +6V - independent of VCC - supporting level-shifting in mixed-supply systems. The MR input includes a 63kΩ internal pullup and rejects glitches <100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±3.5% over -40°C to +125°C; ensures reliable brownout detection before μP malfunction |
| Reset Timeout Period | 1ms (min) at -40°C to +125°C; guarantees sufficient reset assertion time for safe μP initialization |
| Supply Current | 5μA typical at +25°C, 15μA max at +125°C; enables multi-year battery life in portable equipment |
| VCC Operating 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 up to +6V and wired-OR reset bus configurations |
| MR Input Logic | Active-low with 0.3×VCC/0.7×VCC thresholds and 1μs minimum pulse width; eliminates need for external debounce circuitry |
| Operating Temperature | -40°C to +125°C; qualified for under-hood automotive, industrial PLC, and high-reliability embedded applications |
Pinout & Package
Package: 4-pin SOT23 (U4+1), footprint compatible with JEDEC MO-178AB, 1.3mm × 2.9mm body, 0.95mm height, RoHS-compliant.
| 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 | Asserts logic-low during reset; requires external pullup (e.g., 10kΩ) to target supply (≤+6V); supports voltage-level translation |
| MR (Pin 3) | Manual reset input | Active-low input with internal 63kΩ pullup; accepts momentary switch to GND; rejects <100ns noise pulses |
| VCC (Pin 4) | Supply and monitor input | Powers device and provides monitored voltage source; internal divider compares against 2.93V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V threshold | Eliminates external resistor network and calibration, reducing BOM count and layout area in space-constrained SOT23 designs |
| 1ms minimum reset timeout | Guarantees μP reset hold time meets boot ROM requirements without external timing components or software intervention |
| Open-drain RESET with 6V absolute max rating | Enables direct interface to 3.3V, 5V, or mixed-voltage reset buses without level translators or isolation diodes |
| 5μA supply current at +25°C | Supports >10-year battery life in always-on monitoring applications such as smart sensors and IoT edge nodes |
| MR input with integrated 63kΩ pullup | Reduces component count by eliminating external pullup resistor; simplifies PCB routing for pushbutton reset implementation |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental monitoring using coin-cell or Li-SOCl₂ batteries with infrequent wake-up cycles. IC Role / Device Role / Timing Role: Supervisory circuit monitoring VCC during ultra-low-power sleep; asserts RESET if battery voltage sags below 2.93V. Use Value: Prevents corrupted flash writes or state-machine lockup during brownout, extending field deployment lifetime without firmware watchdog reliance. | Use Scenario: DIN-rail mounted programmable logic controller with isolated 24V DC input power and 3.3V logic core. IC Role / Device Role / Timing Role: Monitors local 3.3V rail while allowing RESET output to be pulled up to 24V for legacy backplane reset signaling. Use Value: Enables single-component solution for cross-rail reset coordination, avoiding discrete transistor level shifters and associated layout complexity. |
| Medical Infusion Pumps | Automotive Body Control Modules |
Use Scenario: Safety-critical drug delivery system requiring deterministic startup and fault-safe shutdown. IC Role / Device Role / Timing Role: Provides hardware-enforced reset during power-up, brownout, and manual emergency stop activation via MR. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing μP enters known state before executing therapy algorithms. | Use Scenario: Under-hood electronic control unit exposed to wide temperature swings and load-dump transients. IC Role / Device Role / Timing Role: Monitors 5V supply derived from vehicle battery; immune to 100ns VCC glitches caused by relay switching or alternator ripple. Use Value: Prevents spurious resets during engine cranking or accessory switching, improving system robustness per AEC-Q100 Grade 1 qualification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US29D2+T | Same 2.93V threshold but 20ms (min) reset timeout instead of 1ms | Suitable for μPs requiring longer reset hold times (e.g., FPGA configuration or EEPROM write cycles) | Select when system boot sequence demands extended reset assertion beyond 1ms |
| TLV803EB29DBZR | 2.93V threshold, 140ms min timeout, 0.5μA IQ, SOT23-3 package (no MR pin) | Lacks manual reset input; optimized for ultra-low-power, MR-not-required applications | Choose only if MR functionality is unnecessary and sub-1μA quiescent current is mandatory |
Compared with MAX6315US29D2+T and TLV803EB29DBZR, the MAX6315US29D1+T uniquely balances minimal reset duration (1ms), integrated manual reset, and industry-standard SOT23-4 footprint - making it optimal for cost-sensitive, space-constrained systems needing precise, fast, and user-controllable reset behavior.
Availability
MAX6315US29D1+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial PLC modules, medical infusion pumps, and automotive body control units 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, Inc. 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 reliable power-on reset, brownout protection, and manual reset coordination in resource-constrained embedded systems.
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 operating temperature range (-40°C to +125°C). This value is laser-trimmed on-die and specified in the Ordering Information table of the official datasheet. The MAX6315US29D1+T does not require external calibration or resistor networks to achieve this accuracy.
Does the MAX6315US29D1+T support manual reset functionality?
Yes, the MAX6315US29D1+T includes a dedicated MR (manual reset) input on Pin 3. A logic-low signal on MR asserts RESET immediately and holds it active for the full 1ms timeout period after MR returns high. The MR pin features an internal 63kΩ pullup resistor, so it may be left floating if unused - no external components are required for basic manual reset operation.
Can the RESET output of the MAX6315US29D1+T be pulled up to a voltage higher than VCC?
Yes, the RESET output of the MAX6315US29D1+T is an open-drain structure rated for up to +6.0V absolute maximum, independent of VCC. This allows the RESET signal to be pulled up to a higher supply rail (e.g., 5V or 24V) while monitoring a lower VCC (e.g., 3.3V or 1.8V), enabling level-shifted reset signaling in multi-rail systems without additional components.
What is the minimum VCC voltage at which the MAX6315US29D1+T guarantees RESET assertion?
The MAX6315US29D1+T guarantees RESET remains asserted for VCC > 1.0V, as confirmed in the Electrical Characteristics table. Below 1.0V, the device's ability to sink current at RESET diminishes, but the output will still transition high as VCC decays due to external pullup action. This 1.0V lower limit ensures robust reset behavior during deep brownout conditions common in battery-powered applications.
Is the MAX6315US29D1+T pin-compatible with other devices in the MAX6315 family?
Yes, all MAX6315 variants - including MAX6315US29D1+T, MAX6315US29D2+T, and MAX6315US29D3+T - share identical 4-pin SOT23 (U4+1) packaging and pinout (GND, RESET, MR, VCC). Only the reset timeout period (1ms, 20ms, or 140ms) and temperature grade differ between D1/D2/D3 suffixes; no PCB layout changes are needed when selecting among them.
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:
- 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:
- 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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