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Analog Devices Inc./Maxim Integrated MAX6316MUK31CY
- Part No.:
- MAX6316MUK31CY
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316MUK31CY.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,604
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Product details
Overview
MAX6316MUK31CY from Maxim Integrated is an active-low, bidirectional µP supervisory circuit in SOT23-5 package, featuring 3.1V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply and µP activity, asserts reset on brownout or watchdog timeout, and supports Motorola 68HC11-style bidirectional reset handshaking in embedded control systems.
For engineers reviewing the MAX6316MUK31CY datasheet, MAX6316MUK31CY pinout, MAX6316MUK31CY application, or MAX6316MUK31CY equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, and validated alternative options for industrial and portable equipment designs requiring robust power-on reset and watchdog supervision.
Technical Context
The MAX6316MUK31CY implements a bidirectional reset output with integrated 4.7kΩ pullup resistor and active P-channel pullup FET, enabling fast low-to-high transition (≤666ns at 5V/400pF) to meet Motorola 68HC11's two-clock-cycle reset detection window. Its reset generator guarantees valid output down to VCC = 1V, and it ignores negative VCC transients ≤4µs at 100mV under threshold.
Watchdog functionality clears on any WDI edge (≥50ns pulse width), with internal servicing when WDI is unconnected. Manual reset (MR) features 52kΩ internal pullup, 100ns glitch rejection, and 1.5µs minimum pulse width over full temperature range (–40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.1V ±2.5% (factory-trimmed; enables precise brownout detection at 3.3V systems) |
| Reset Timeout Period | 140ms minimum (ensures stable µP initialization after power-up or recovery) |
| Watchdog Timeout | 1.6s typical (supports mid-range firmware loop monitoring without excessive overhead) |
| Supply Current | 5µA typical at 3.6V (enables battery-powered operation for >10 years in low-duty-cycle systems) |
| VCC Operating Range | 1.0V to 5.5V (guarantees reset assertion validity during deep brownout down to 1V) |
| Reset Output Type | Bidirectional, active-low (direct interface to 68HC11 and similar µPs without external pullup) |
| Temperature Range | –40°C to +125°C (qualified for industrial and automotive under-hood environments) |
Pinout & Package
MAX6316MUK31CY is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant, with exposed pad option available. Pin 1 is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Bidirectional active-low reset I/O | Drives low to assert reset; pulls high via internal 4.7kΩ + active P-FET; supports µP-initiated reset detection |
| 2 - GND | Ground reference | Primary return path for all internal circuits; must be low-impedance connection to system ground plane |
| 3 - MR | Manual reset input | Active-low; internally pulled up to VCC (52kΩ); accepts TTL/CMOS logic; rejects 100ns glitches |
| 4 - WDI | Watchdog input | Edge-triggered (rising/falling); resets watchdog timer; draws ≤160µA when high; disabled if left floating |
| 5 - VCC | Supply voltage input | Monitored power rail; reset asserted when VCC falls below 3.1V; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional reset with active pullup | Enables reliable 68HC11-compatible reset handshaking even with ≥3 devices on shared RESET bus |
| Factory-trimmed 3.1V threshold | Eliminates external resistor network; ensures ±2.5% accuracy over –40°C to +125°C |
| 140ms reset timeout | Guarantees sufficient hold time for 3.3V µPs with slow clock startup (e.g., ARM Cortex-M0+) |
| 1.6s watchdog period | Matches typical firmware main-loop execution time in portable instrumentation and sensor nodes |
| VCC immunity to 4µs/100mV transients | Prevents spurious resets in noisy industrial environments without requiring additional LC filtering |
Applications
| Industrial PLC I/O Module | Portable Medical Monitor |
|---|---|
|
Use Scenario: Compact programmable logic controller module powered from 3.3V DC-DC converter with multiple microcontrollers sharing one reset bus. IC Role / Device Role / Timing Role: Bidirectional supervisory IC asserting reset on brownout and enabling µP self-diagnosis via reset line state sampling. Use Value: Eliminates need for external 4.7kΩ pullup and discrete transistor; ensures <666ns rise time meets 68HC11 timing spec across temperature. |
Use Scenario: Battery-powered ECG monitor with ultra-low-power ARM MCU that must survive brief battery dips during RF transmission. IC Role / Device Role / Timing Role: Monitors 3.3V rail and triggers watchdog reset if firmware hangs during analog acquisition sequence. Use Value: 5µA quiescent current extends battery life; 1.6s watchdog timeout aligns with max ECG waveform processing interval. |
| Automotive Body Control Unit | Smart Energy Meter |
|
Use Scenario: Under-hood body control module operating from 5V supply subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides valid reset signal down to VCC = 1V and rejects fast negative VCC spikes during cranking. Use Value: Guaranteed operation at –40°C to +125°C avoids thermal derating; 100mV/4µs transient immunity reduces need for TVS diodes. |
Use Scenario: DIN-rail mounted electricity meter with isolated µP and real-time clock, powered from auxiliary 3.3V supply. IC Role / Device Role / Timing Role: Supervises µP supply and provides manual reset via front-panel button without external debounce components. Use Value: Internal 52kΩ MR pullup and 100ns glitch rejection eliminate BOM cost and PCB area for RC filter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK31CY | Active-low push/pull reset (no bidirectional capability); identical threshold, timeout, and watchdog specs | Requires external pullup for µPs needing bidirectional reset detection; unsuitable for 68HC11 interfaces | Select only when reset line is dedicated to supervisor and µP does not sample RESET state post-reset |
| TLV803EB31DBVR | 3.1V threshold, 140ms timeout, no watchdog or manual reset; SOT23-5, 1.8–6V VCC range | Lacks WDI and MR inputs; cannot support firmware watchdog or user-initiated reset | Choose only for simple power-on reset where watchdog and manual reset are unnecessary |
Compared with MAX6316LUK31CY and TLV803EB31DBVR, the MAX6316MUK31CY uniquely delivers bidirectional reset handshaking with active pullup-critical for legacy µP diagnostics-while retaining full watchdog and manual reset functionality in the same compact footprint.
Availability
MAX6316MUK31CY is available at Aetrix Electronics and suitable for industrial PLC modules, portable medical monitors, automotive body control units, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6316MUK31CY 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 industrial, automotive, and computing applications.
The MAX6316–MAX6322 family was engineered specifically for µP supervision in space-constrained, high-reliability systems-delivering factory-trimmed thresholds, bidirectional reset compatibility, and robust transient immunity without external components.
FAQ
What is the exact reset threshold voltage of MAX6316MUK31CY?
The MAX6316MUK31CY has a factory-trimmed nominal reset threshold of 3.1V, with guaranteed tolerance of ±2.5% over the full operating temperature range (–40°C to +125°C). This value is confirmed in Table 1 and Table 2 of the official Maxim datasheet, and corresponds to the "31" suffix in the part number.
Does MAX6316MUK31CY support bidirectional reset communication with the Motorola 68HC11?
Yes, MAX6316MUK31CY is explicitly designed for bidirectional reset interfaces like the Motorola 68HC11. Its RESET pin combines a 4.7kΩ pullup resistor with an active P-channel FET, enabling fast low-to-high transitions (<666ns) required for the µP's two-clock-cycle reset source identification protocol.
What is the watchdog timeout period for MAX6316MUK31CY, and how is it configured?
The MAX6316MUK31CY features a typical watchdog timeout period of 1.6s, corresponding to the "Y" suffix in its internal ordering code. This value is factory-programmed and fixed-no external components or configuration pins are required to set or adjust the watchdog period.
Can MAX6316MUK31CY operate reliably during severe VCC transients?
Yes, MAX6316MUK31CY is immune to short negative VCC transients: it will not assert reset for pulses ≤4µs duration when the drop is 100mV below the 3.1V threshold. This behavior is guaranteed by design and verified in Figure 6 of the datasheet (MAX6316toc06).
Is an external pullup resistor needed for the RESET pin of MAX6316MUK31CY?
No, MAX6316MUK31CY integrates both a 4.7kΩ passive pullup and an active P-channel pullup FET on the RESET pin. This eliminates the need for any external pullup resistor-even in multi-device reset bus configurations-and ensures compliant rise time for bidirectional µPs like the 68HC11.
MAX6316MUK31CY 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:
- 3.08V
- 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
MAX6316MUK31CY FAQ
1.How can I place an order for MAX6316MUK31CY through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316MUK31CY 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 MAX6316MUK31CY reliable?
The price and inventory of MAX6316MUK31CY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316MUK31CY is usually 5 days.
3.What payment methods are accepted for MAX6316MUK31CY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316MUK31CY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316MUK31CY?
MAX6316MUK31CY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316MUK31CY 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 MAX6316MUK31CY?
For technical support, including MAX6316MUK31CY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316MUK31CY requirements.
6.How does Aetrix verify that MAX6316MUK31CY is sourced from the original manufacturer or authorized distributors?
All MAX6316MUK31CY 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 MAX6316MUK31CY meets industry standards.
7.What is the process for return or replacement of MAX6316MUK31CY?
All MAX6316MUK31CY units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316MUK31CY, 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 MAX6316MUK31CY part is unused and in its original packaging.
Return procedure for MAX6316MUK31CY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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