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Analog Devices Inc./Maxim Integrated MAX6316LUK46CY+T
- Part No.:
- MAX6316LUK46CY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316LUK46CY+T.pdf
- Description:
- IC MPU/RESET CIRC 4.63V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6316LUK46CY+T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low push/pull reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and provides manual reset and watchdog functionality for embedded microcontroller systems requiring reliable power-on and brownout protection.
For engineers reviewing the MAX6316LUK46CY+T datasheet, MAX6316LUK46CY+T pinout, MAX6316LUK46CY+T application, or MAX6316LUK46CY+T equivalent, key selection criteria include its guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), bidirectional reset compatibility (via internal active pullup), and AEC-Q100 qualification for automotive-adjacent industrial use.
Technical Context
The MAX6316LUK46CY+T implements a precision voltage monitor with laser-trimmed resistive divider setting VRST = 4.63V ±2.5% over -40°C to +125°C, combined with a digital reset timer generating a fixed 140ms minimum assertion period after VCC recovery. Its watchdog circuit responds to WDI edge transitions with 1.6s typical timeout, cleared on any rising or falling edge - not level detection.
This variant belongs to the MAX6316L series: it features an active-low push/pull RESET output (not open-drain or bidirectional), includes both MR and WDI inputs, and guarantees VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.7V) and VOH ≥ 0.8×VCC at ISOURCE = 500µA (VCC ≥ 2.7V). Reset propagation delay tRD is 40µs when VCC falls at 1mV/µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% over -40°C to +125°C - ensures reliable detection of 5V rail brownout before system instability |
| Reset Timeout Period | 140ms minimum - holds processor in reset long enough for power stabilization and clock settling |
| Watchdog Timeout | 1.6s typical - provides sufficient margin to detect firmware hangs without false triggers during normal operation |
| Supply Current | 5µA typical at VCC = 3.6V - enables battery-powered operation for >10 years in low-duty-cycle monitoring |
| Operating Voltage Range | 1.0V to 5.5V - supports valid reset assertion even during deep brownout, down to near-fully discharged Li-ion cells |
| Reset Output Type | Active-low push/pull - drives RESET line directly without external pullup; sinks 1.2mA, sources 500µA |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive, industrial control, and extended-temperature computing |
Pinout & Package
MAX6316LUK46CY+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads optimized for automated reflow assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET (active-low) | CMOS push/pull output; asserts logic low during VCC undervoltage, MR assertion, or watchdog timeout - no external pullup required |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection to system ground plane |
| 3 | MR (active-low) | Manual reset input; internally pulled up to VCC via 52kΩ resistor; 1µs minimum pulse width; rejects 100ns glitches |
| 4 | WDI | Watchdog input; edge-triggered (rising/falling); clears internal timer on transition; disable by leaving unconnected or three-stating |
| 5 | VCC | Supply input; monitored for reset generation; absolute max rating -0.3V to +6V; operates down to 1.0V with guaranteed reset behavior |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated voltage reference, reset timer, watchdog counter, and push/pull driver eliminate need for RC networks, discrete transistors, or pullup resistors |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset state during severe brownout - critical for flash write integrity and SRAM retention in portable systems |
| Immunity to short VCC transients | Rejects <4µs negative spikes at 100mV below VRST - prevents spurious resets from switching noise or load dump events |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 1: -40°C to +125°C), including HTOL, temperature cycling, and ESD testing per JESD22 |
| Factory-trimmed precision | 4.63V threshold trimmed to ±1.5% at +25°C and ±2.5% over full temperature range - eliminates calibration overhead in production |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 5V supply powering ARM Cortex-M7 MCU and CAN transceivers in harsh factory-floor environments with frequent 24V bus transients. IC Role / Device Role / Timing Role: Primary power supervisor asserting active-low RESET to halt CPU execution during undervoltage; provides 140ms hold time for FPGA configuration and clock lock. Use Value: Prevents corrupted I/O register writes during brownout by guaranteeing reset remains asserted until stable 5V rail is confirmed - avoids relay chatter and sensor misreads. |
Use Scenario: Embedded in door module controlling window lift, mirror fold, and interior lighting; powered from vehicle battery with wide voltage range (6V–16V). IC Role / Device Role / Timing Role: Supervises local 5V LDO output feeding microcontroller; uses WDI to detect firmware lockup during LIN communication stack execution. Use Value: 1.6s watchdog timeout aligns with LIN frame timing margins; AEC-Q100 qualification ensures operation at 125°C ambient under dash panel. |
| Portable Medical Infusion Pump | Ruggedized Handheld Test Instrument |
|
Use Scenario: Battery-powered device using single-cell Li-ion (2.7V–4.2V) with boost converter to generate 5V system rail; requires fail-safe shutdown on low-battery warning. IC Role / Device Role / Timing Role: Monitors boosted 5V rail; asserts RESET when VCC drops below 4.63V - triggering controlled pump stop and alarm before battery depletion. Use Value: 4.63V threshold precisely targets end-of-discharge voltage of boost stage; 140ms timeout allows safe motor coast-down and EEPROM save before power loss. |
Use Scenario: Field-deployable multimeter with real-time OS, display, and USB-C host interface; subject to ESD events and thermal cycling during outdoor use. IC Role / Device Role / Timing Role: Provides primary reset supervision for application processor and analog front-end ASIC; MR pin connected to front-panel reset button. Use Value: Internal 52kΩ MR pullup eliminates external BOM component; 100ns MR glitch rejection prevents false resets from button bounce or nearby RF interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316MUK46CY+T | Bidirectional active-low RESET output with integrated 4.7kΩ pullup + P-channel active pullup; same 4.63V threshold, 140ms timeout, 1.6s watchdog | Required when interfacing with Motorola 68HC11 or other µPs with bidirectional reset pins needing fast rise time under capacitive load | Select MAX6316MUK46CY+T only if target µP demands bidirectional reset signaling; otherwise MAX6316LUK46CY+T's push/pull output simplifies layout and reduces external part count. |
| TLV809E46DBZR | Single-supply supervisor with 4.63V threshold and 140ms timeout, but no watchdog or manual reset; SOT23-3 package (3 pins, no WDI/MR) | Suitable only for basic power-monitoring applications where firmware hang detection and user-initiated reset are unnecessary | Choose TLV809E46DBZR only for cost-sensitive, space-constrained designs lacking watchdog requirements; MAX6316LUK46CY+T adds robustness via dual fault-detection paths. |
Compared with MAX6316MUK46CY+T, MAX6316LUK46CY+T offers simpler integration for standard push/pull reset interfaces and eliminates bidirectional timing constraints; versus TLV809E46DBZR, it delivers critical system-level resilience through independent watchdog and manual reset channels - essential for safety-critical or field-upgradable devices.
Availability
MAX6316LUK46CY+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical infusion pumps, and ruggedized handheld test instruments requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6316LUK46CY+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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6316–MAX6322 family was designed specifically for robust microprocessor supervision in harsh environments - integrating precision voltage monitoring, programmable reset timing, watchdog fault detection, and manual reset into miniature 5-pin packages with AEC-Q100 qualification.
FAQ
What is the exact reset threshold voltage of MAX6316LUK46CY+T and how stable is it over temperature?
The MAX6316LUK46CY+T has a factory-trimmed nominal reset threshold of 4.63V, specified as ±1.5% at +25°C and ±2.5% over the full operating range of -40°C to +125°C. Its temperature coefficient is 40ppm/°C, meaning drift is bounded and predictable - for example, at +125°C, VRST remains within 4.514V to 4.746V per datasheet Table 1. This stability ensures consistent brownout detection across automotive and industrial thermal profiles.
Does MAX6316LUK46CY+T require external components to function?
No, MAX6316LUK46CY+T requires zero external components for core operation: its precision voltage reference, reset timer, watchdog counter, and push/pull RESET driver are fully integrated. Unlike discrete solutions, it needs no RC network for timeout setting, no pullup resistor for RESET, and no external debouncing for MR - reducing BOM count, board area, and qualification effort while improving reliability.
How does the watchdog feature of MAX6316LUK46CY+T differ from simple timeout-based reset ICs?
The MAX6316LUK46CY+T watchdog is edge-triggered - it clears on *any* rising or falling transition at the WDI pin, not on level maintenance. This prevents false resets during software stalls where WDI might float or remain static. With a 1.6s typical timeout, it detects infinite loops or task deadlocks while tolerating brief delays in WDI servicing - unlike basic timeout supervisors that reset if WDI stays high/low beyond threshold.
Can MAX6316LUK46CY+T operate reliably during severe supply brownout conditions?
Yes, MAX6316LUK46CY+T guarantees valid RESET output behavior down to VCC = 1.0V - far below its 4.63V threshold. Its push/pull driver maintains VOL ≤ 0.3V at ISINK = 1.2mA even at 1.0V supply, ensuring clean logic-low assertion to hold the microprocessor in reset until power recovers. This capability is critical for preserving flash memory integrity and preventing partial writes during battery depletion.
Is MAX6316LUK46CY+T compatible with modern lead-free PCB assembly processes?
Yes, MAX6316LUK46CY+T is supplied in lead-free packaging (indicated by the "+T" suffix) and rated for reflow soldering up to +260°C per JEDEC J-STD-020. Its SOT23-5 package (U5+2A) is compatible with standard stencil printing, pick-and-place, and convection reflow profiles - and has been validated for thermal cycling and intermetallic growth resistance in automotive-grade manufacturing lines.
MAX6316LUK46CY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6316LUK46CY+T FAQ
1.How can I place an order for MAX6316LUK46CY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316LUK46CY+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 MAX6316LUK46CY+T reliable?
The price and inventory of MAX6316LUK46CY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316LUK46CY+T is usually 5 days.
3.What payment methods are accepted for MAX6316LUK46CY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316LUK46CY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316LUK46CY+T?
MAX6316LUK46CY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316LUK46CY+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 MAX6316LUK46CY+T?
For technical support, including MAX6316LUK46CY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316LUK46CY+T requirements.
6.How does Aetrix verify that MAX6316LUK46CY+T is sourced from the original manufacturer or authorized distributors?
All MAX6316LUK46CY+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 MAX6316LUK46CY+T meets industry standards.
7.What is the process for return or replacement of MAX6316LUK46CY+T?
All MAX6316LUK46CY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316LUK46CY+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 MAX6316LUK46CY+T part is unused and in its original packaging.
Return procedure for MAX6316LUK46CY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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