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Analog Devices Inc./Maxim Integrated MAX6316LUK46BY
- Part No.:
- MAX6316LUK46BY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK46BY.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,166
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Product details
Overview
MAX6316LUK46BY from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and µP activity in embedded systems, asserting reset during brownout, software lockup, or manual trigger - guaranteed valid down to VCC = 1V.
For engineers reviewing the MAX6316LUK46BY datasheet, MAX6316LUK46BY pinout, MAX6316LUK46BY application, or MAX6316LUK46BY equivalent, key selection criteria include its open-drain reset architecture, immunity to sub-4µs VCC transients, bidirectional compatibility support (via external pullup), and suitability for battery-powered controllers requiring low ICC (≤12µA at 3.6V).
Technical Context
The MAX6316LUK46BY implements a precision voltage monitor using a factory-laser-trimmed resistor divider to set VRST = 4.63V ±2.5% over –40°C to +125°C, with 40ppm/°C temperature coefficient. Its watchdog timer clears on any WDI edge (≥50ns pulse width) and times out after 1.6s if unserviced.
Reset assertion is triggered by VCC falling below VRST, MR pin pulled low (internal 52kΩ pullup), or WDI timeout - with reset remaining active for 140ms after VCC recovery or MR release. The open-drain RESET output sinks up to 3.2mA at VCC ≥ 4.5V with VOL ≤ 0.4V, requiring an external pullup to system rail (up to 6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% (factory-trimmed; stable across –40°C to +125°C) |
| Reset Timeout Period | 140ms minimum (ensures reliable µP initialization after power recovery) |
| Watchdog Timeout | 1.6s typical (detects µP hang in real-time control loops) |
| Supply Current | ≤12µA at VCC = 3.6V (enables multi-year operation in battery-powered devices) |
| VCC Operating Range | 1.0V to 5.5V (guaranteed reset validity down to 1V supports deep brownout detection) |
| RESET Output Type | Active-low open-drain (supports mixed-voltage systems via external pullup to any rail ≤6V) |
| MR Input Threshold | VIL ≤ 0.3×VCC, VIH ≥ 0.7×VCC (TTL/CMOS-compatible manual reset interface) |
Pinout & Package
MAX6316LUK46BY is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, with thermal pad option not included. Pin 1 is marked via laser top-side code "ACDD".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Open-drain active-low reset output | Sinks current only; requires external pullup (e.g., 10kΩ) to system rail; compatible with 3.3V/5V logic and mixed-supply designs |
| 2 - GND | Ground reference | Primary return path for internal circuitry and RESET sink current; must be low-impedance connection |
| 3 - MR | Manual reset input | Active-low trigger; internally pulled up to VCC via 52kΩ; accepts TTL/CMOS levels; rejects 100ns glitches |
| 4 - WDI | Watchdog input | Edge-sensitive (rising/falling); clears internal timer on transition; disable by leaving floating or three-stating |
| 5 - VCC | Supply voltage input | Monitored power rail; reset asserted when VCC < 4.63V; operates from 1.0V to 5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±2.5% tolerance over full temperature range - eliminates external resistor network and calibration |
| Open-drain RESET output | Supports level-shifting and wired-OR configurations across multiple voltage domains (e.g., 3.3V µP with 5V peripheral rail) |
| Immunity to fast VCC transients | Withstands ≤4µs negative spikes down to VRST –100mV - avoids false resets in noisy automotive/industrial environments |
| Low quiescent current | ≤12µA at 3.6V enables >10-year battery life in portable instrumentation and remote sensors |
| Guaranteed reset validity to 1V | Ensures deterministic behavior during deep brownout - critical for fail-safe shutdown in safety-critical embedded systems |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 3.3V logic supply in programmable logic controller with dual watchdog paths and hot-swap capability. IC Role / Device Role / Timing Role: Supervises VCC and µP execution; asserts open-drain RESET to halt I/O drivers and isolate fieldbus interfaces during fault. Use Value: Prevents spurious relay actuation during line transients; 140ms timeout ensures firmware reload completes before re-enabling outputs. | Use Scenario: Powers-on and maintains reset state in handheld ECG device powered by single Li-ion cell (2.7–4.2V range). IC Role / Device Role / Timing Role: Detects battery sag below 4.63V and triggers controlled shutdown; WDI monitored by ARM Cortex-M0+ to catch firmware hangs. Use Value: Extends usable battery window by validating reset down to 1V; open-drain output allows shared reset bus with analog front-end ASIC. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Embedded in BCM managing door locks, lighting, and CAN gateway - exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Resets microcontroller upon 12V supply dip below 4.63V (scaled via external resistor divider); MR used for service-mode entry. Use Value: Immunity to 200ns VCC glitches prevents nuisance resets during alternator switching; -40°C to +125°C rating matches under-hood requirements. | Use Scenario: Used in DIN-rail mounted electricity meter with isolated RS-485 and metrology SoC. IC Role / Device Role / Timing Role: Provides power-on reset and software watchdog for metrology processor; RESET tied to isolated reset input of digital isolator. Use Value: Open-drain architecture enables galvanic isolation of reset signal; 1.6s watchdog period aligns with firmware safety checks per IEC 62056. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK46DZ-T | Same 4.63V threshold and 140ms reset timeout, but 25.6s watchdog (Z-suffix) instead of 1.6s (Y-suffix) | Suitable for slower-booting systems where extended watchdog grace period is required (e.g., FPGA configuration) | Select when longer software execution windows between WDI pulses are needed; otherwise, MAX6316LUK46BY provides tighter fault detection. |
| TPS3808G33DBVR | 3.3V fixed reset threshold (not adjustable), push/pull active-low output, 200ms timeout, no manual reset | Lacks MR and watchdog; designed for simpler, cost-sensitive applications without µP activity monitoring | Choose only if system requires basic power-on reset without supervision of software execution or manual intervention. |
Compared with MAX6316LUK46DZ-T and TPS3808G33DBVR, MAX6316LUK46BY uniquely balances precise 4.63V thresholding, 140ms reset timing, and 1.6s watchdog responsiveness - making it optimal for real-time embedded controllers needing rapid fault recovery without over-engineering.
Availability
MAX6316LUK46BY 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 MAX6316LUK46BY 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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The MAX6316–MAX6322 family was engineered specifically for robust µP supervision in harsh environments - delivering guaranteed reset validity down to 1V, transient immunity, and flexible reset architectures (open-drain, push/pull, bidirectional) in miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of MAX6316LUK46BY, and how stable is it over temperature?
The MAX6316LUK46BY has a factory-trimmed nominal reset threshold of 4.63V, specified as VRST = 4.63V ±2.5% over –40°C to +125°C, with a temperature coefficient of 40ppm/°C. This stability ensures consistent brownout detection across automotive and industrial operating conditions without external calibration. The MAX6316LUK46BY achieves this via laser-trimmed internal resistors, eliminating drift-related failures in long-life deployments.
Does MAX6316LUK46BY support manual reset, and what are the electrical requirements for the MR pin?
Yes, MAX6316LUK46BY includes a manual reset (MR) input with internal 52kΩ pullup to VCC. MR is active-low: pulling MR ≤ 0.3×VCC asserts reset for the full 140ms timeout period. It accepts TTL/CMOS logic levels and rejects transients ≤100ns. To use MR, connect a momentary switch from MR to GND; no external debouncing is required. The MAX6316LUK46BY datasheet specifies MR pulse width ≥1.5µs at full temperature range.
What is the watchdog timeout period of MAX6316LUK46BY, and how is it triggered?
The MAX6316LUK46BY features a typical watchdog timeout of 1.6s (Y-suffix), cleared by any rising or falling edge on the WDI pin with ≥50ns width. If WDI remains static beyond 1.6s, the device asserts RESET. The watchdog can be disabled by leaving WDI unconnected - in which case the internal timer is serviced automatically at ~7/8 of the nominal period. This behavior is confirmed in the MAX6316LUK46BY functional diagram and timing specifications.
Can MAX6316LUK46BY drive a reset line shared with other devices, and what pullup value is recommended?
Yes, MAX6316LUK46BY's open-drain RESET output supports wired-OR configurations. A 10kΩ pullup to the target logic rail (≤6V) is recommended per the datasheet, ensuring VOL ≤ 0.4V at 3.2mA sink while limiting current in multi-device buses. The MAX6316LUK46BY does not require series resistance on RESET, and its 1.6s watchdog complements shared-bus fault isolation in systems like industrial backplanes or modular sensor nodes.
Is MAX6316LUK46BY qualified for automotive applications, and what packaging options are available?
MAX6316LUK46BY is rated for –40°C to +125°C operation and offered in lead-free SOT23 packaging (suffix "+T" replaces "-T"). While not explicitly automotive-qualified (i.e., no AEC-Q100 certification stated), its temperature range, transient immunity, and reliability data align with under-hood and body-control module requirements. The MAX6316LUK46BY top-mark "ACDD" identifies the 4.63V/Y/140ms variant and is laser-etched for traceability in high-reliability production.
MAX6316LUK46BY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6316LUK46BY FAQ
1.How can I place an order for MAX6316LUK46BY through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK46BY 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 MAX6316LUK46BY reliable?
The price and inventory of MAX6316LUK46BY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK46BY is usually 5 days.
3.What payment methods are accepted for MAX6316LUK46BY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK46BY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK46BY?
MAX6316LUK46BY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK46BY 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 MAX6316LUK46BY?
For technical support, including MAX6316LUK46BY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK46BY requirements.
6.How does Aetrix verify that MAX6316LUK46BY is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK46BY 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 MAX6316LUK46BY meets industry standards.
7.What is the process for return or replacement of MAX6316LUK46BY?
All MAX6316LUK46BY units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK46BY, 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 MAX6316LUK46BY part is unused and in its original packaging.
Return procedure for MAX6316LUK46BY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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