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Analog Devices Inc./Maxim Integrated MAX6316MUK46AY+
- Part No.:
- MAX6316MUK46AY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316MUK46AY+.pdf
- Description:
- MAX6316 5-PIN MICROPROCESSOR SUP
- Quantity:
- Payment:
- Shipping:
Inventory:2,397
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Product details
Overview
MAX6316MUK46AY+ from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with bidirectional active-low 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, providing guaranteed reset validity down to VCC = 1V and immunity to fast negative transients - critical for portable/battery-powered equipment and industrial controllers.
For engineers reviewing the MAX6316MUK46AY+ datasheet, MAX6316MUK46AY+ pinout, MAX6316MUK46AY+ application, or MAX6316MUK46AY+ equivalent, key selection considerations include its bidirectional reset interface (designed for Motorola 68HC11), internal active pullup FET + 4.7kΩ resistor, no external components required, and lead-free RoHS-compliant packaging.
Technical Context
The MAX6316MUK46AY+ implements a dual-stage reset generator with voltage monitoring, manual reset input (MR), and watchdog timer (WDI). Its bidirectional RESET output combines an internal 4.7kΩ passive pullup with an active P-channel FET that enables fast low-to-high transitions (<2µs one-shot) - essential for reliable reset source identification in multi-device systems.
Reset assertion occurs when VCC falls below 4.63V ±2.5%, MR is pulled low, or WDI remains static beyond 1.6s. Reset remains active for ≥140ms after VCC recovery or MR release. The device operates across -40°C to +125°C and draws only 3–8µA at 3.6V, with guaranteed functionality down to VCC = 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% at -40°C to +125°C - factory-trimmed for precise brownout detection in 5V systems |
| Reset Timeout Period | 140ms minimum - ensures stable µP initialization after power recovery or manual reset |
| Watchdog Timeout | 1.6s typical - provides robust software execution monitoring without excessive timeout latency |
| Supply Current | 3µA (min) to 8µA (typ) at 3.6V - enables ultra-low-power operation in battery-backed applications |
| Operating Voltage Range | 1.0V to 5.5V - guarantees valid reset signaling even during deep brownout conditions |
| Reset Output Type | Bidirectional active-low - supports µP reset source discrimination (e.g., Motorola 68HC11) without external pullup |
| Temperature Range | -40°C to +125°C - qualified for industrial and extended-temperature embedded control environments |
Pinout & Package
Package: 5-pin SOT23 (lead-free, RoHS-compliant); footprint compatible with industry-standard 5-pin SOT-23 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Bidirectional active-low reset I/O | Interfaces directly with µP bidirectional reset pins; includes internal 4.7kΩ pullup + active P-FET for fast rise time under capacitive load |
| 2 - GND | Ground reference | Primary return path for all internal circuits; must be connected to system ground plane for noise immunity |
| 3 - MR | Manual reset input | Active-low input with internal 52kΩ pullup; asserts reset when pulled low; rejects ≤100ns glitches |
| 4 - WDI | Watchdog input | Edge-triggered input; reset asserted if no transition occurs within 1.6s; accepts 50ns pulses |
| 5 - VCC | Supply voltage input | Monitored power rail; reset asserted when VCC drops below 4.63V; functional down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET with active pullup | Enables µP-level reset source identification (e.g., external vs. internal) in <2 clock cycles - solves timing failure on shared reset buses |
| No external components required | Integrates precision voltage reference, reset timer, watchdog logic, pullup resistor, and ESD protection - reduces BOM count and PCB area |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic system behavior during deep brownout or battery depletion - eliminates undefined reset states |
| Immunity to short VCC transients | Rejects ≤4µs, 100mV-under-threshold glitches - prevents spurious resets in noisy power environments |
| Factory-trimmed 4.63V threshold | Eliminates need for external resistor dividers; achieves ±2.5% tolerance over full temperature range without calibration |
Applications
| Portable/Battery-Powered Equipment | Industrial Embedded Controllers |
|---|---|
|
Use Scenario: Power management in handheld test instruments with Li-ion battery supply prone to voltage sag during peak current draw. IC Role / Device Role / Timing Role: Monitors VCC and asserts bidirectional reset to ARM Cortex-M0+ MCU when battery drops below 4.63V; enables firmware to enter safe shutdown mode before brownout. Use Value: Prevents memory corruption and state loss by guaranteeing clean reset initiation at precisely 4.63V, even as battery voltage decays from 4.8V to 3.0V. |
Use Scenario: PLC I/O module operating in factory automation with 24V DC supply converted to 5V via switching regulator subject to EMI-induced transients. IC Role / Device Role / Timing Role: Supervises 5V rail and detects µP lockup via WDI; uses bidirectional RESET to distinguish between power-fail and software-fault resets for diagnostic logging. Use Value: Enables root-cause analysis of system failures by preserving reset source identity - critical for predictive maintenance and compliance reporting. |
| Intelligent Sensors | Computers & Computing Peripherals |
|
Use Scenario: Wireless environmental sensor node powered by energy harvesting (solar + supercapacitor), where VCC ramps slowly and unpredictably. IC Role / Device Role / Timing Role: Provides power-on reset with 140ms timeout and 4.63V threshold to ensure MCU boots only when stable 5V is available; WDI monitors sensor data acquisition loop. Use Value: Eliminates boot failures caused by marginal VCC by enforcing strict voltage and timing criteria - improves field reliability without firmware workarounds. |
Use Scenario: Compact fan controller board in NAS enclosure with multiple voltage rails and thermal management firmware. IC Role / Device Role / Timing Role: Supervises 5V standby rail and triggers reset if main CPU fails to service WDI within 1.6s; bidirectional RESET allows host BIOS to detect supervisor-initiated vs. thermal-shutdown resets. Use Value: Supports differentiated error handling in UEFI firmware by preserving reset origin - enables targeted diagnostics instead of generic reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK46AY+ | Active-low push/pull reset output (not bidirectional); same 4.63V threshold, 140ms timeout, 1.6s watchdog | Lacks bidirectional capability; requires external pullup for open-drain compatibility; unsuitable for 68HC11-style reset arbitration | Select when system uses standard CMOS reset input and does not require µP-level reset source identification |
| MAX6321HPUK46AY+ | Open-drain active-low reset output; same 4.63V threshold, 140ms timeout, 1.6s watchdog; adds high-voltage tolerant RESET (up to 6V) | Requires external pullup resistor; supports mixed-voltage reset bus (e.g., 3.3V µP with 5V pullup); no active pullup FET | Select when interfacing with multiple supply domains or legacy µPs requiring open-drain reset signaling |
Compared with MAX6316LUK46AY+ and MAX6321HPUK46AY+, the MAX6316MUK46AY+ uniquely delivers bidirectional reset arbitration with integrated active pullup - enabling deterministic reset source identification in multi-master systems without layout changes or external components.
Availability
MAX6316MUK46AY+ is available at Aetrix Electronics and suitable for portable/battery-powered equipment, industrial embedded controllers, intelligent sensors, and computing peripherals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6316MUK46AY+ 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 power, sensing, and connectivity applications in industrial, automotive, and communications 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 (bidirectional, push/pull, open-drain) in miniature SOT23 packages.
FAQ
What is the exact reset threshold voltage of the MAX6316MUK46AY+?
The MAX6316MUK46AY+ 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 confirmed in Table 1 and Table 2 of the Maxim datasheet, and corresponds to the "46" suffix in the part number. The threshold is set using laser-trimmed resistors and does not require external calibration.
Does the MAX6316MUK46AY+ require an external pullup resistor on the RESET pin?
No, the MAX6316MUK46AY+ does not require an external pullup resistor. It integrates both a 4.7kΩ passive pullup and an active P-channel FET pullup on the bidirectional RESET pin. This dual-stage architecture ensures fast low-to-high transitions under capacitive loads - a key requirement for Motorola 68HC11-compatible reset arbitration - and eliminates the need for external components.
What is the watchdog timeout period for the MAX6316MUK46AY+?
The MAX6316MUK46AY+ has a typical watchdog timeout period of 1.6 seconds, corresponding to the "Y" suffix in the part number per Table 3 of the datasheet. This value is specified at TA = +25°C and remains stable across temperature, with normalized variation shown in Figure MAX6316toc05. The watchdog timer clears on any WDI edge or reset assertion.
Can the MAX6316MUK46AY+ operate reliably when VCC drops below 2.0V?
Yes, the MAX6316MUK46AY+ guarantees valid reset output functionality down to VCC = 1.0V, as explicitly stated in the General Description and Electrical Characteristics sections. This includes proper RESET assertion/deassertion, MR input response, and WDI edge detection - making it suitable for deep brownout scenarios common in battery-powered systems.
How does the bidirectional RESET output of the MAX6316MUK46AY+ differ from open-drain or push/pull outputs?
The MAX6316MUK46AY+ bidirectional RESET output enables µP-level reset source identification (e.g., external supervisor vs. internal watchdog fault) by supporting controlled low-to-high transitions within two clock cycles. Unlike open-drain (requires external pullup) or push/pull (unidirectional drive), it combines internal passive and active pullup to meet tight timing constraints on shared reset buses - a capability documented specifically for Motorola 68HC11 compatibility.
MAX6316MUK46AY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6316MUK46AY+ FAQ
1.How can I place an order for MAX6316MUK46AY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316MUK46AY+ 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 MAX6316MUK46AY+ reliable?
The price and inventory of MAX6316MUK46AY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316MUK46AY+ is usually 5 days.
3.What payment methods are accepted for MAX6316MUK46AY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6316MUK46AY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316MUK46AY+?
MAX6316MUK46AY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316MUK46AY+ 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 MAX6316MUK46AY+?
For technical support, including MAX6316MUK46AY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316MUK46AY+ requirements.
6.How does Aetrix verify that MAX6316MUK46AY+ is sourced from the original manufacturer or authorized distributors?
All MAX6316MUK46AY+ 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 MAX6316MUK46AY+ meets industry standards.
7.What is the process for return or replacement of MAX6316MUK46AY+?
All MAX6316MUK46AY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316MUK46AY+, 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 MAX6316MUK46AY+ part is unused and in its original packaging.
Return procedure for MAX6316MUK46AY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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