My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6315US29D3-T
- Part No.:
- MAX6315US29D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US29D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,802
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6315US29D3-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 upon manual reset assertion. It features a factory-trimmed 2.93V reset threshold, 140ms minimum reset timeout period, 5μA supply current at +25°C, and operates across -40°C to +125°C for use in battery-powered controllers and industrial μP systems.
For engineers reviewing the MAX6315US29D3-T datasheet, MAX6315US29D3-T pinout, MAX6315US29D3-T application, or MAX6315US29D3-T equivalent, key selection criteria include guaranteed reset assertion below 2.93V ±3.5% over temperature, immunity to sub-100ns MR glitches, open-drain RESET output compatible with pullup voltages up to +6V, and SOT23-4 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6315US29D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.93V nominal reset threshold, with ±3.5% tolerance over -40°C to +125°C. Its internal timer generates a fixed 140ms (min) reset timeout after VCC recovery or MR deassertion.
It uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting across supplies (e.g., VCC = 3.3V, pullup = 5V), and includes a 63kΩ internal MR pullup resistor with 1μs minimum pulse width requirement and 100ns glitch rejection capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 3V systems |
| Reset Timeout Period | 140ms (min) - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 5μA at +25°C, VCC = 5.5V - enables multi-year operation in coin-cell–powered devices |
| Operating Voltage Range | 1.0V to 5.5V - supports monitoring of 1.2V, 1.8V, 2.5V, 3.0V, 3.3V, and 5.0V rails |
| RESET Output Type | Open-drain, rated to 6V - allows pullup to higher-voltage domain for mixed-supply reset coordination |
| MR Input Threshold | VIL = 0.3 × VCC, VIH = 0.7 × VCC (VTH < 4.0V) - ensures noise-immune logic-level compatibility |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6315US29D3-T is housed in a 4-pin SOT23 package (package code U4+1), with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for high-density PCB layouts in portable electronics.
| 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 (e.g., 10kΩ) to any supply ≤6V |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ; debounced by design |
| VCC (Pin 4) | Supply and monitor input | Powers device and provides voltage reference for reset threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V threshold | Eliminates external resistor network and calibration, reducing BOM count and layout area |
| 140ms minimum reset timeout | Ensures full μP core and peripheral initialization before release, preventing boot failures |
| Open-drain RESET with 6V rating | Enables reset coordination across multiple voltage domains without level translators |
| 5μA quiescent current | Extends battery life in always-on monitoring applications such as smart sensors and IoT endpoints |
| 100ns MR glitch rejection | Rejects EMI-induced noise on manual reset line without requiring external RC filtering |
Applications
| Industrial PLC Controllers | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous operation in factory-floor automation where power rails experience brownouts during motor switching. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during VCC dips below 2.93V and holding reset for ≥140ms post-recovery. Use Value: Prevents corrupted firmware execution and I/O misconfiguration during transient undervoltage events. | Use Scenario: Long-term environmental monitoring using coin-cell or Li-SOCl₂ batteries with infrequent wake-up cycles. IC Role / Device Role / Timing Role: Low-current (5μA) voltage supervisor ensuring safe μC boot only when supply exceeds 2.93V. Use Value: Maximizes usable battery capacity by eliminating false resets and minimizing standby power loss. |
| Automotive Body Control Modules | Medical Portable Diagnostic Devices |
Use Scenario: Under-hood ECUs exposed to wide temperature swings (-40°C to +125°C) and load-dump transients. IC Role / Device Role / Timing Role: Temperature-stable reset generator with ±3.5% threshold accuracy and 140ms timeout for MCU safety startup. Use Value: Meets AEC-Q100 Grade 1 requirements for functional safety-critical power sequencing. | Use Scenario: Handheld ultrasound or glucose meters requiring FDA-compliant power integrity and user-initiated reset. IC Role / Device Role / Timing Role: Combines automatic VCC supervision and debounced MR input (via momentary switch to GND). Use Value: Eliminates need for external debounce components while ensuring deterministic reset behavior per IEC 62304. |
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 vs. 140ms | Suitable for faster-boot μCs where shorter reset hold time is acceptable | Select when system initialization completes in <25ms and longer timeout risks unnecessary delay |
| TPS3808G12DBVR | 2.93V threshold, 200ms (typ) timeout, 1.4μA ICC, SOT23-5 package | Includes watchdog timer not present in MAX6315US29D3-T; requires one extra pin | Choose if system requires both reset supervision and watchdog functionality in same footprint family |
Compared with MAX6315US29D2-T and TPS3808G12DBVR, the MAX6315US29D3-T delivers the longest standard timeout (140ms min) in the MAX6315 family without added complexity, making it optimal for legacy or resource-constrained μPs needing robust brownout recovery without watchdog overhead.
Availability
MAX6315US29D3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US29D3-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 product line delivers precision, low-power supervisory circuits for microprocessor reset generation, designed specifically for reliability-critical embedded systems operating across harsh thermal and electrical environments.
FAQ
What is the exact reset threshold voltage of the MAX6315US29D3-T?
The MAX6315US29D3-T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±2.5% over -40°C to +85°C and ±3.5% over -40°C to +125°C. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table of the official Analog Devices datasheet. The MAX6315US29D3-T does not require external calibration or resistor networks to achieve this accuracy.
Does the MAX6315US29D3-T support operation below 2.5V?
Yes, the MAX6315US29D3-T operates down to 1.0V supply voltage per its Absolute Maximum Ratings and Electrical Characteristics, though its 2.93V reset threshold means it will assert reset whenever VCC drops below that level. At VCC < 1.0V, the device may not reliably sink RESET current; however, the RESET output remains valid down to VCC = 1.0V with 0.3V VOL at 80μA sink current.
Can the RESET output of the MAX6315US29D3-T be pulled up to 5V while VCC is at 3.3V?
Yes, the MAX6315US29D3-T RESET pin is open-drain and rated for voltages up to +6.0V, allowing it to be pulled up to 5V even when VCC = 3.3V. This enables level-shifting between different supply domains. The internal n-channel MOSFET can safely sink current from the 5V pullup, provided the sink current stays within 20mA absolute maximum rating.
What is the minimum pulse width required on the MR pin for reliable reset assertion in the MAX6315US29D3-T?
The MR input of the MAX6315US29D3-T requires a minimum logic-low pulse width of 1μs to guarantee reset assertion. Additionally, the device rejects glitches shorter than 100ns, providing inherent noise immunity. No external debounce circuitry is needed when using a momentary switch tied to GND, thanks to the internal 63kΩ pullup resistor and integrated filtering.
Is the MAX6315US29D3-T RoHS-compliant and lead-free?
Yes, the MAX6315US29D3-T is RoHS-compliant and lead-free, indicated by the "+T" suffix in its ordering code and confirmed in Analog Devices' Package Information documentation. The SOT23 package carries a "+" symbol denoting RoHS status, and the device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount assembly.
MAX6315US29D3-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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US29D3-T FAQ
1.How can I place an order for MAX6315US29D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US29D3-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 MAX6315US29D3-T reliable?
The price and inventory of MAX6315US29D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US29D3-T is usually 5 days.
3.What payment methods are accepted for MAX6315US29D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US29D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US29D3-T?
MAX6315US29D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US29D3-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 MAX6315US29D3-T?
For technical support, including MAX6315US29D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US29D3-T requirements.
6.How does Aetrix verify that MAX6315US29D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6315US29D3-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 MAX6315US29D3-T meets industry standards.
7.What is the process for return or replacement of MAX6315US29D3-T?
All MAX6315US29D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US29D3-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 MAX6315US29D3-T part is unused and in its original packaging.
Return procedure for MAX6315US29D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6315US29D3-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
