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Analog Devices Inc./Maxim Integrated MAX6316MUK46CY
- Part No.:
- MAX6316MUK46CY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316MUK46CY.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:117
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Product details
Overview
MAX6316MUK46CY from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low bidirectional 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 control systems, asserting reset during brownout, software hang, or manual trigger - guaranteed valid down to VCC = 1V.
For engineers reviewing the MAX6316MUK46CY datasheet, MAX6316MUK46CY pinout, MAX6316MUK46CY application, or MAX6316MUK46CY equivalent, key selection criteria include bidirectional reset compatibility with Motorola 68HC11-style µPs, immunity to sub-4µs VCC transients, internal 4.7kΩ pullup + active P-channel pullup for fast RESET rise time, and no external components required.
Technical Context
The MAX6316MUK46CY implements a bidirectional reset architecture designed specifically for µPs with tri-state reset I/O (e.g., Motorola 68HC11), combining a 4.7kΩ passive pullup resistor with an active P-channel FET that engages when RESET rises above 0.65V and disengages above 0.85×VCC. Its watchdog timer clears on any WDI edge (≥50ns pulse) and times out after 1.6s if unserviced.
Reset assertion occurs when VCC falls below 4.63V (±2.5% over -40°C to +125°C), MR is pulled low, or WDI remains static beyond 1.6s; reset remains active for exactly 140ms after VCC recovers or MR releases. The device draws only 5µA at VCC = 3.6V and operates across the full industrial temperature range (-40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% (factory-trimmed; enables precise brownout detection at 4.63V nominal) |
| Reset Timeout Period | 140ms minimum (guaranteed hold time ensures reliable µP initialization after power recovery) |
| Watchdog Timeout | 1.6s typical (prevents infinite loops in firmware without requiring periodic high-duty-cycle WDI toggling) |
| Supply Current | 5µA at VCC = 3.6V (ultra-low quiescent current extends battery life in portable equipment) |
| VCC Operating Range | 1.0V to 5.5V (reset remains valid down to 1V, supporting deep brownout recovery) |
| Reset Output Type | Active-low bidirectional (supports µP self-diagnostics by distinguishing internal vs. external reset sources) |
| Package | 5-pin SOT23 (2.9mm × 1.6mm footprint; compatible with high-density PCB layouts) |
Pinout & Package
MAX6316MUK46CY is housed in a 5-pin SOT23 package with gull-wing leads, rated for -40°C to +125°C operation and RoHS-compliant lead-free finish (marked "ACDF").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Bidirectional active-low reset I/O | Drives low to assert reset; includes internal 4.7kΩ pullup + active P-FET for <2-cycle rise time on µP reset bus |
| 2 - GND | Ground reference | Common return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 - MR | Manual reset input | Pull low to force reset; internally pulled up to VCC via 52kΩ; rejects 100ns transients |
| 4 - WDI | Watchdog input | Edge-triggered (rising/falling); clears watchdog timer on each transition; disable by leaving floating |
| 5 - VCC | Supply voltage input | Monitored power rail; reset asserts when VCC drops below 4.63V; functional down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional reset interface | Enables Motorola 68HC11-style µP self-diagnostics by allowing µP to detect source of reset (internal vs. external) |
| Active + passive pullup on RESET | Combines 4.7kΩ resistor with P-channel FET to achieve sub-500ns rise time even with 200pF bus capacitance |
| Immunity to VCC transients | Rejects negative glitches ≤4µs duration at 100mV under threshold - eliminates false resets from switching noise |
| No external components required | Integrates precision voltage reference, watchdog timer, reset generator, and pullup network - reduces BOM count |
| Guaranteed operation to VCC = 1V | Ensures valid reset signaling during deep brownout recovery, critical for fail-safe embedded systems |
Applications
| Motorola 68HC11-Based Control Systems | Portable/Battery-Powered Instrumentation |
|---|---|
Use Scenario: Industrial controller using Motorola 68HC11 µP with bidirectional reset pin, operating in electrically noisy environments with frequent supply fluctuations. IC Role / Device Role / Timing Role: Supervisory IC providing bidirectional reset assertion, watchdog monitoring of firmware execution, and manual reset capability. Use Value: Enables µP to distinguish between self-initiated and supervisor-initiated resets, allowing differentiated boot vectors and preserved state recovery. |
Use Scenario: Handheld multimeter powered by two AA cells, requiring ultra-low quiescent current and robust brownout protection during battery depletion. IC Role / Device Role / Timing Role: Voltage monitor and reset generator ensuring clean µP startup and watchdog-enforced firmware recovery before battery voltage collapses. Use Value: 5µA supply current extends battery life; 4.63V threshold prevents erratic operation near end-of-life; 140ms timeout guarantees full µP initialization. |
| Embedded Controllers in Automotive ECUs | Intelligent Power Management Modules |
Use Scenario: Engine control unit exposed to load dump and cold-crank transients, where VCC may dip below 5V but must maintain deterministic reset behavior. IC Role / Device Role / Timing Role: Primary supervisory circuit monitoring main 5V rail, asserting reset on undervoltage and servicing watchdog based on CAN message timing. Use Value: Immunity to 4µs/100mV VCC glitches prevents spurious resets during cranking; 1.6s watchdog aligns with diagnostic cycle timing. |
Use Scenario: Smart power distribution board managing multiple DC-DC converters, requiring coordinated reset sequencing and fault detection. IC Role / Device Role / Timing Role: Central reset arbiter with manual override (MR), watchdog supervision of control firmware, and precise 4.63V trip point for 5V rail monitoring. Use Value: Bidirectional RESET allows upstream controllers to signal faults; 140ms timeout synchronizes with converter soft-start delays. |
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 (not bidirectional); same 4.63V threshold, 140ms timeout, 1.6s watchdog | Lacks bidirectional capability; cannot support µP self-diagnostics; requires external pullup for open-drain compatibility | Select when interfacing with standard CMOS µPs lacking bidirectional reset I/O and cost sensitivity outweighs diagnostic flexibility |
| MAX6318MHUK46CY-T | Same bidirectional reset, 4.63V threshold, 140ms timeout, but no manual reset (MR) input | Omits MR functionality; relies solely on VCC monitoring and watchdog; not suitable for systems requiring operator-initiated reset | Select when manual reset is unnecessary and board space is constrained - identical pinout and reset behavior otherwise |
Compared with MAX6316LUK46CY-T and MAX6318MHUK46CY-T, the MAX6316MUK46CY uniquely combines bidirectional reset, manual reset input, and watchdog - enabling full diagnostic capability, field serviceability, and firmware safety in a single 5-pin SOT23 package.
Availability
MAX6316MUK46CY is available at Aetrix Electronics and suitable for portable instrumentation, automotive embedded controllers, and intelligent power management modules requiring stable component supply, long-term lifecycle support, and guaranteed performance across -40°C to +125°C.
Supply support for MAX6316MUK46CY 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, mixed-signal, and power management ICs for demanding industrial, automotive, and computing applications.
The MAX6316–MAX6322 family was engineered to deliver robust, low-power µP supervision with configurable reset outputs and integrated watchdog - targeting space-constrained, battery-sensitive, and safety-critical embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6316MUK46CY?
The MAX6316MUK46CY features a factory-trimmed reset threshold of 4.63V, with tolerance of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is laser-trimmed during manufacturing and specified in Table 1 of the datasheet; it enables precise detection of 5V rail brownout conditions without external resistive dividers.
Does MAX6316MUK46CY support bidirectional reset functionality, and which microprocessors is it compatible with?
Yes, MAX6316MUK46CY provides active-low bidirectional reset output explicitly designed for microprocessors with tri-state reset I/O, such as the Motorola 68HC11. Its internal architecture combines a 4.7kΩ pullup resistor with an active P-channel FET to ensure RESET rises within two external clock cycles - enabling the µP to distinguish between self-initiated and external resets.
What is the watchdog timeout period for MAX6316MUK46CY, and how is it triggered?
The MAX6316MUK46CY has a typical watchdog timeout period of 1.6s, corresponding to the "Y" suffix in its ordering code. It is triggered when the WDI pin remains static (neither rising nor falling edge detected) for longer than 1.6s. Each edge on WDI clears the timer, and the timer restarts upon reset deassertion.
Can MAX6316MUK46CY operate reliably during deep brownout conditions?
Yes, MAX6316MUK46CY guarantees valid reset output down to VCC = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. This ensures deterministic reset assertion and release even during severe supply sags - a critical feature for fail-safe embedded control systems.
Is an external pullup resistor required for the RESET pin of MAX6316MUK46CY?
No, MAX6316MUK46CY integrates both a 4.7kΩ passive pullup resistor and an active P-channel FET on the RESET pin, eliminating the need for external components. The active pullup engages automatically when RESET rises above 0.65V, ensuring fast rise time even with capacitive loads up to 200pF - as verified in the Typical Operating Characteristics.
MAX6316MUK46CY 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:
- Bidirectional
- 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
MAX6316MUK46CY FAQ
1.How can I place an order for MAX6316MUK46CY through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316MUK46CY 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 MAX6316MUK46CY reliable?
The price and inventory of MAX6316MUK46CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316MUK46CY is usually 5 days.
3.What payment methods are accepted for MAX6316MUK46CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316MUK46CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316MUK46CY?
MAX6316MUK46CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316MUK46CY 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 MAX6316MUK46CY?
For technical support, including MAX6316MUK46CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316MUK46CY requirements.
6.How does Aetrix verify that MAX6316MUK46CY is sourced from the original manufacturer or authorized distributors?
All MAX6316MUK46CY 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 MAX6316MUK46CY meets industry standards.
7.What is the process for return or replacement of MAX6316MUK46CY?
All MAX6316MUK46CY units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316MUK46CY, 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 MAX6316MUK46CY part is unused and in its original packaging.
Return procedure for MAX6316MUK46CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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