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Analog Devices Inc./Maxim Integrated MAX6317HUK46CY+T
- Part No.:
- MAX6317HUK46CY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6317HUK46CY+T.pdf
- Description:
- IC MPU/RESET CIRC 4.63V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,129
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Product details
Overview
MAX6317HUK46CY+T from Maxim Integrated is an active-high push/pull microprocessor supervisory IC with 4.63V reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply voltage, provides manual reset input (MR), and asserts a clean reset signal during power-up, brownout, or software hang conditions - used in embedded controllers and portable instrumentation.
For engineers reviewing the MAX6317HUK46CY+T datasheet, MAX6317HUK46CY+T pinout, MAX6317HUK46CY+T application, or MAX6317HUK46CY+T equivalent, key selection criteria include its factory-trimmed 4.63V threshold, guaranteed reset validity down to VCC = 1V, AEC-Q100 qualification, and compatibility with systems requiring active-high reset assertion without external pullup components.
Technical Context
The MAX6317HUK46CY+T implements a precision bandgap-based reset generator with laser-trimmed voltage divider for ±1.5% threshold accuracy at +25°C and ±2.5% over –40°C to +125°C. Its internal watchdog timer clears on any WDI edge and times out after 1.6s if unserviced, triggering reset assertion independent of VCC level.
It features a CMOS push/pull RESET output capable of sourcing ≥500µA at VCC ≥ 2.7V (VOH ≥ 0.8×VCC) and sinking ≥1.2mA (VOL ≤ 0.3V), with guaranteed logic-level validity down to VCC = 1V. The MR input includes 52kΩ internal pullup and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal (±1.5% at +25°C); ensures reliable detection of 5V rail brownout before system instability. |
| Reset Timeout Period | 140ms minimum; holds reset active long enough for microcontroller power stabilization and clock lock. |
| Watchdog Timeout | 1.6s typical; detects firmware hangs in real-time control loops without excessive latency. |
| Supply Current | 5µA typical at VCC = 3.6V; enables battery-powered operation for >10 years in low-duty-cycle systems. |
| Operating Temperature | –40°C to +125°C; supports industrial and automotive under-hood applications. |
| Reset Output Type | Active-high push/pull; drives reset input directly without external pullup resistor or level-shifting. |
| AEC-Q100 Qualified | Grade 1 (–40°C to +125°C); validated for automotive electronic control units per stress test requirements. |
Pinout & Package
MAX6317HUK46CY+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-high push/pull reset output; sources/sinks current to drive µP reset pin directly. |
| 2 | GND | Ground reference for all internal circuitry and reset timing accuracy. |
| 3 | MR | Active-low manual reset input; internally pulled up to VCC (52kΩ); debounced by 100ns glitch filter. |
| 4 | WDI | Watchdog input; edge-sensitive (rising/falling); resets internal timer on transition; disable by leaving floating. |
| 5 | VCC | Supply input (1.0V to 5.5V); reset asserted when VCC falls below 4.63V; valid operation down to 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.63V with ±1.5% tolerance at +25°C ensures precise 5V rail monitoring without calibration. |
| Guaranteed reset validity to VCC = 1V | Enables fail-safe reset assertion even during deep brownout, preventing undefined µP state. |
| No external components required | Integrates pullup resistor, voltage reference, watchdog timer, and reset generator - reduces BOM count by 4–6 passives. |
| Immunity to short negative VCC transients | Rejects <4µs, 100mV-under-threshold glitches - eliminates spurious resets in noisy power environments. |
| AEC-Q100 Grade 1 qualification | Validated for automotive ECU use including temperature cycling, HAST, and mechanical shock testing. |
Applications
| Industrial Controllers | Portable Test Instruments |
|---|---|
Use Scenario: PLC I/O modules operating in factory-floor environments with fluctuating 24VDC-derived 5V rails. IC Role / Device Role / Timing Role: Monitors 5V supply integrity and asserts active-high reset to ARM Cortex-M7 controller upon brownout or watchdog timeout. Use Value: Prevents corrupted register writes during undervoltage, ensuring deterministic recovery without firmware intervention. |
Use Scenario: Handheld multimeter with lithium battery, sleep mode current <10µA, and wake-on-button press. IC Role / Device Role / Timing Role: Provides 140ms power-on reset and 1.6s watchdog supervision during measurement firmware execution. Use Value: Guarantees µC starts from known state after battery insertion or low-power wake, eliminating boot failures. |
| Automotive Body Control Modules | Medical Infusion Pumps |
Use Scenario: BCM managing door locks, lighting, and HVAC in passenger compartment (-40°C to +105°C). IC Role / Device Role / Timing Role: Supervises 5V domain derived from vehicle battery; asserts reset on VCC dip below 4.63V or software hang. Use Value: Meets ISO 16750-2 pulse immunity requirements and supports ASIL-B functional safety architecture. |
Use Scenario: Battery-powered infusion pump delivering precise drug dosing with motor control and sensor feedback. IC Role / Device Role / Timing Role: Generates active-high reset for safety-critical MCU and monitors firmware liveness via WDI toggling. Use Value: Ensures immediate shutdown and restart on processor lockup, preventing overdose or underdose events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK46CY+T | Active-low push/pull reset output; identical 4.63V threshold and 140ms timeout. | Requires µP with active-low reset input; incompatible with active-high-only interfaces. | Select when target µP accepts only active-low reset assertion and no level translation is desired. |
| TLV803EB29DBVR | 2.93V fixed threshold, no watchdog, SOT-23-5, 3.5µA supply current. | Lacks manual reset and watchdog; suitable only for basic power-on reset, not system supervision. | Choose for cost-sensitive, non-safety-critical applications where watchdog and MR are unnecessary. |
Compared with MAX6317HUK46CY+T, MAX6316LUK46CY+T offers identical supervision accuracy but inverted reset polarity, while TLV803EB29DBVR sacrifices watchdog and MR functionality for lower quiescent current and cost - making it unsuitable for fault-tolerant embedded control.
Availability
MAX6317HUK46CY+T is available at Aetrix Electronics and suitable for industrial controllers, portable test instruments, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6317HUK46CY+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) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on reliability and integration.
The MAX6316–MAX6322 family delivers compact, factory-trimmed supervisory solutions for microprocessor reset and watchdog functions in space-constrained, high-reliability embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6317HUK46CY+T?
The MAX6317HUK46CY+T has a factory-trimmed nominal reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over –40°C to +125°C. This value is laser-trimmed during production and verified per Table 1 in the datasheet; it ensures accurate detection of 5V rail collapse before system malfunction occurs.
Does MAX6317HUK46CY+T require an external pullup resistor on the RESET pin?
No, MAX6317HUK46CY+T does not require an external pullup resistor because it features an active-high push/pull RESET output that both sources and sinks current. The output drives logic-high levels (≥0.8×VCC) and logic-low levels (≤0.3V) directly, eliminating need for external biasing components in standard 5V or 3.3V systems.
How does the watchdog function work on MAX6317HUK46CY+T?
The MAX6317HUK46CY+T watchdog timer times out after 1.6s if the WDI pin is not toggled (rising or falling edge). It clears on any WDI transition or during reset assertion. To disable, leave WDI unconnected - the internal timer then self-services at ~7/8 of the timeout period. This prevents unintended resets while maintaining low power.
Is MAX6317HUK46CY+T qualified for automotive applications?
Yes, MAX6317HUK46CY+T is AEC-Q100 Grade 1 qualified (–40°C to +125°C), with full stress testing including temperature cycling, HTOL, and ESD. Its 4.63V threshold aligns with 5V automotive domain supplies, and its immunity to short VCC transients meets ISO 16750-2 requirements for robustness in vehicle electrical systems.
What is the minimum supply voltage at which MAX6317HUK46CY+T guarantees valid RESET output levels?
MAX6317HUK46CY+T guarantees valid RESET output logic levels down to VCC = 1V. At this voltage, the active-high output maintains VOH ≥ 0.8×VCC and VOL ≤ 0.3V under specified sink/source loads - ensuring deterministic reset signaling even during severe brownout conditions before complete power loss.
MAX6317HUK46CY+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 High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6317HUK46CY+T FAQ
1.How can I place an order for MAX6317HUK46CY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6317HUK46CY+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 MAX6317HUK46CY+T reliable?
The price and inventory of MAX6317HUK46CY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6317HUK46CY+T is usually 5 days.
3.What payment methods are accepted for MAX6317HUK46CY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6317HUK46CY+T transactions.
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4.How is shipping managed for MAX6317HUK46CY+T?
MAX6317HUK46CY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6317HUK46CY+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 MAX6317HUK46CY+T?
For technical support, including MAX6317HUK46CY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6317HUK46CY+T requirements.
6.How does Aetrix verify that MAX6317HUK46CY+T is sourced from the original manufacturer or authorized distributors?
All MAX6317HUK46CY+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 MAX6317HUK46CY+T meets industry standards.
7.What is the process for return or replacement of MAX6317HUK46CY+T?
All MAX6317HUK46CY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6317HUK46CY+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 MAX6317HUK46CY+T part is unused and in its original packaging.
Return procedure for MAX6317HUK46CY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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