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Analog Devices Inc./Maxim Integrated MAX6316MUK29CY-T
- Part No.:
- MAX6316MUK29CY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6316MUK29CY-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,687
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Product details
Overview
The MAX6316MUK29CY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with bidirectional active-low reset output, 2.93V 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 reset assertion during power-up, brownout, or software hang conditions - used in battery-powered controllers and industrial instrumentation.
For engineers reviewing the MAX6316MUK29CY-T datasheet, MAX6316MUK29CY-T pinout, MAX6316MUK29CY-T application, or MAX6316MUK29CY-T equivalent, key selection criteria include its bidirectional reset interface for Motorola 68HC11-compatible µPs, guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs), and AEC-Q100 qualification for automotive-adjacent designs.
Technical Context
The MAX6316MUK29CY-T implements a dual-stage reset generator with voltage monitoring and watchdog timer logic. Its bidirectional RESET output combines a 4.7kΩ internal pullup resistor with an active P-channel pullup FET that engages above 0.65V to ensure fast rise time (<666ns at 5V/400pF) - critical for µPs requiring reset source discrimination within two clock cycles.
It features manual reset (MR) input with 52kΩ internal pullup and 100ns glitch rejection, watchdog input (WDI) sensitive to edges ≥50ns, and operates across -40°C to +125°C with supply current as low as 5µA at 3.6V. Reset threshold exhibits ±2.5% tolerance over temperature and 40ppm/°C drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V nominal (±2.5% over -40°C to +125°C); ensures reliable detection of 3.3V rail brownout before µP malfunction. |
| Reset Timeout Period | 140ms minimum; guarantees µP remains held in reset long enough for stable power and clock startup. |
| Watchdog Timeout | 1.6s typical; provides sufficient margin to detect firmware hangs without false triggers during normal execution. |
| Supply Current | 5µA typical at 3.6V; enables multi-year operation in battery-backed portable instrumentation. |
| Operating Temperature | -40°C to +125°C; supports deployment in under-hood automotive ECUs and industrial control cabinets. |
| Reset Output Type | Bidirectional active-low; interfaces directly with Motorola 68HC11-style µPs for source-aware reset vector selection. |
| AEC-Q100 Qualified | Yes; meets stress testing requirements for automotive-grade reliability without derating. |
Pinout & Package
MAX6316MUK29CY-T is housed in a 5-pin SOT23 package (package code U5+2A, outline 21-0057), footprint compatible with JEDEC MO-178AB, land pattern 90-0174. The miniature 2.9mm × 1.6mm body enables high-density PCB layouts in space-constrained portable equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Bidirectional RESET | Active-low reset signal with integrated 4.7kΩ pullup + active P-FET; asserts on VCC drop, MR low, or WDI timeout. |
| 2 | GND | Ground reference for all internal comparators, timers, and output drivers; must be low-impedance connection. |
| 3 | MR | Manual reset input with 52kΩ internal pullup; asserted low for ≥1.5µs at full temperature range to trigger reset. |
| 4 | WDI | Watchdog input; edge-sensitive (≥50ns); resets internal timer on rising/falling transitions; disable by leaving floating. |
| 5 | VCC | Supply input (1.0V–5.5V); powers all circuitry and defines reset threshold reference; immune to <4µs negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET with active pullup | Enables µP-level reset source identification (e.g., 68HC11) by guaranteeing RESET rise time <666ns even with 400pF bus capacitance. |
| Factory-trimmed 2.93V threshold | Matches common 3.3V system rails with ±2.5% tolerance over full temperature range - no external resistor network required. |
| Guaranteed reset validity to VCC = 1V | Ensures clean reset assertion during deep brownout or battery discharge down to 1V, preventing µP lockup. |
| No external components needed | Integrates precision voltage reference, watchdog timer, MR pullup, and RESET driver - reduces BOM count and layout area. |
| Immunity to short VCC glitches | Rejects negative transients ≤4µs duration (e.g., 100mV below VRST), eliminating spurious resets in noisy power environments. |
Applications
| Industrial Motor Controllers | Portable Medical Monitors |
|---|---|
|
Use Scenario: Real-time motor control loop running on an ARM Cortex-M4 µP powered from a 3.3V buck converter subject to load-induced ripple. IC Role / Device Role / Timing Role: Supervisory IC asserting bidirectional RESET to distinguish between µP-initiated fault recovery and external power-fail events. Use Value: Enables deterministic reset vector selection - allowing safe torque shutdown on external brownout while preserving state for watchdog-triggered firmware restart. |
Use Scenario: Battery-powered ECG monitor with sleep/wake cycles and flash memory logging, operating across -20°C to +55°C ambient. IC Role / Device Role / Timing Role: Voltage supervisor ensuring µP remains held in reset until 3.3V rail stabilizes post-battery insertion, with 1.6s watchdog timeout catching firmware stalls. Use Value: Eliminates need for external RC timing network and pullup resistors - reducing component count and leakage paths in ultra-low-power design. |
| Automotive Body Control Modules | Smart Sensor Transmitters |
|
Use Scenario: LIN-based door module exposed to load dump and cold-crank conditions where VCC may dip to 2.8V transiently. IC Role / Device Role / Timing Role: AEC-Q100-qualified supervisory circuit monitoring 3.3V domain, asserting reset only when VCC falls below 2.93V for >140ms. Use Value: Prevents erroneous actuator commands during cranking transients while maintaining functional safety compliance per ISO 26262 ASIL-B requirements. |
Use Scenario: 4–20mA HART sensor node powered from loop supply, requiring fail-safe behavior if µP locks up during analog conversion. IC Role / Device Role / Timing Role: Watchdog-enabled supervisor interfacing with µP's GPIO to pulse WDI every 500ms - triggering hard reset if communication halts. Use Value: Guarantees autonomous recovery without host intervention, meeting SIL-2 process safety mandates for field instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6316LUK29CY-T | Active-low push/pull RESET output (not bidirectional); same 2.93V threshold, 140ms timeout, 1.6s watchdog. | Lacks bidirectional capability - unsuitable for µPs requiring reset source discrimination (e.g., 68HC11). | Select when interfacing with standard CMOS µPs with dedicated active-low reset pins and no need for source-aware reset handling. |
| TLV803EB29DBZR | Single-function voltage supervisor (no watchdog or MR); 2.93V threshold, 140ms delay; SOT23-3 package (no WDI/MR pins). | No watchdog or manual reset functionality; requires external circuitry for those features. | Choose for cost-sensitive, space-constrained applications needing only power-on reset with minimal feature set. |
Compared with MAX6316LUK29CY-T, the MAX6316MUK29CY-T adds bidirectional reset support essential for legacy µP architectures, while TLV803EB29DBZR trades away watchdog and MR capability to reduce size and cost - making it viable only where those functions are implemented elsewhere.
Availability
MAX6316MUK29CY-T is available at Aetrix Electronics and suitable for industrial motor controllers, portable medical monitors, automotive body control modules, and smart sensor transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6316MUK29CY-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 precision analog and mixed-signal ICs for power, sensing, and connectivity applications, with emphasis on high-reliability industrial and automotive markets.
The MAX6316–MAX6322 family targets µP supervision in harsh environments, delivering integrated watchdog, manual reset, and multiple reset output configurations - specifically engineered for robustness in battery-powered, automotive, and industrial control systems.
FAQ
What is the reset output configuration of the MAX6316MUK29CY-T?
The MAX6316MUK29CY-T features a bidirectional active-low reset output designed for microprocessors like the Motorola 68HC11. It integrates a 4.7kΩ pullup resistor and an active P-channel FET that engages above 0.65V to ensure fast rise time. This allows the µP to determine whether reset was triggered externally or by itself - a capability not present in push/pull or open-drain variants of the MAX6316 family.
Does the MAX6316MUK29CY-T require external components for basic operation?
No, the MAX6316MUK29CY-T requires no external components for core supervision functionality. It integrates the precision voltage reference, watchdog timer, MR pullup resistor (52kΩ), and bidirectional RESET driver. Only decoupling capacitance (e.g., 0.1µF near VCC) is recommended for noise immunity - no timing resistors, capacitors, or pullups are needed for reset generation, watchdog, or manual reset operation.
How does the MAX6316MUK29CY-T handle VCC transients during operation?
The MAX6316MUK29CY-T is immune to short negative-going VCC transients up to 4µs duration when the overdrive (VRST – VCC) is ≤100mV. This prevents spurious resets during switching noise or load-dump events. For enhanced immunity, a 0.1µF ceramic capacitor placed close to the VCC pin is recommended - a design practice confirmed in Maxim's application notes for this device family.
What is the watchdog timeout behavior when the WDI pin is left unconnected?
When WDI is left unconnected, the MAX6316MUK29CY-T internally services the watchdog timer at intervals equal to 7/8 of the nominal timeout period (i.e., ~1.4s for the Y-version). This prevents unintended reset assertion while retaining watchdog functionality - a feature explicitly documented in the MAX6316–MAX6322 datasheet section "Watchdog Input" and verified in Typical Operating Characteristics Figure 7.
Is the MAX6316MUK29CY-T qualified for automotive applications?
Yes, the MAX6316MUK29CY-T is AEC-Q100 qualified (Grade 1: -40°C to +125°C), meeting stress test requirements for automotive electronic control units. While not marked with "/V" (which denotes full automotive qualification including PPAP), its AEC-Q100 status confirms suitability for under-hood and body electronics where extended temperature operation and reliability are mandatory - as stated in the official Maxim Integrated package information table.
MAX6316MUK29CY-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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6316MUK29CY-T FAQ
1.How can I place an order for MAX6316MUK29CY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6316MUK29CY-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 MAX6316MUK29CY-T reliable?
The price and inventory of MAX6316MUK29CY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6316MUK29CY-T is usually 5 days.
3.What payment methods are accepted for MAX6316MUK29CY-T?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6316MUK29CY-T?
MAX6316MUK29CY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6316MUK29CY-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 MAX6316MUK29CY-T?
For technical support, including MAX6316MUK29CY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6316MUK29CY-T requirements.
6.How does Aetrix verify that MAX6316MUK29CY-T is sourced from the original manufacturer or authorized distributors?
All MAX6316MUK29CY-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 MAX6316MUK29CY-T meets industry standards.
7.What is the process for return or replacement of MAX6316MUK29CY-T?
All MAX6316MUK29CY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6316MUK29CY-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 MAX6316MUK29CY-T part is unused and in its original packaging.
Return procedure for MAX6316MUK29CY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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