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Analog Devices Inc./Maxim Integrated MAX6319MHUK46C+
- Part No.:
- MAX6319MHUK46C+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319MHUK46C+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,982
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Product details
Overview
MAX6319MHUK46C+ 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 period, and no watchdog timer. It interfaces directly with Motorola 68HC11-style bidirectional reset pins in embedded control systems requiring robust power-on/brownout detection.
For engineers reviewing the MAX6319MHUK46C+ datasheet, MAX6319MHUK46C+ pinout, MAX6319MHUK46C+ application, or MAX6319MHUK46C+ equivalent, key selection criteria include bidirectional reset compatibility, guaranteed reset validity down to VCC = 1V, manual reset input support, and AEC-Q100 qualification for automotive-adjacent industrial use.
Technical Context
The MAX6319MHUK46C+ implements a bidirectional reset architecture with integrated 4.7kΩ pullup resistor and parallel P-channel active pullup FET, enabling fast RESET rise time (<666ns at 5V/400pF) even with multiple devices on the bus. Its reset generator asserts when VCC falls below 4.63V (±2.5% over -40°C to +125°C), MR is pulled low, or after reset timeout expiration.
No watchdog timer is present - confirmed by Selector Guide and Electrical Characteristics tables showing blank WDI column for MAX6319 variants. Manual reset input features internal 52kΩ pullup, 100ns glitch rejection, and TTL/CMOS-compatible thresholds dependent on VTH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% over -40°C to +125°C - sets precise brownout detection point for 5V systems |
| Reset Timeout Period | 140ms minimum - ensures sufficient processor initialization time after power stabilization |
| Supply Current | 3–8µA at VCC = 3.6V - enables ultra-low-power operation in battery-backed applications |
| Operating Voltage Range | 1.0V to 5.5V - guarantees valid reset assertion down to near-dead-battery conditions |
| Reset Output Type | Active-Low Bidirectional - supports direct interface with Motorola 68HC11 and similar μPs requiring bidirectional reset signaling |
| Package | SOT23-5 (U5+2A) - 2.9mm × 1.6mm footprint saves board space in compact designs |
| AEC-Q100 Qualified | Grade 3 (-40°C to +125°C) - validated for automotive-adjacent industrial environments |
Pinout & Package
MAX6319MHUK46C+ uses the standard 5-pin SOT23 package (outline 21-0057, land pattern 90-0174), RoHS-compliant with "+" suffix. Pin functions are validated per Maxim's Pin Description table and Typical Operating Circuit diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Bidirectional RESET | Active-low open-drain-like output with integrated 4.7kΩ pullup + active P-FET - enables μP self-detection of reset source |
| 2 | GND | Ground reference for all internal circuits and reset timing accuracy |
| 3 | MR | Manual reset input with internal 52kΩ pullup - asserted low to force system reset; rejects 100ns transients |
| 4 | NC | No connection - unused pin; must be left floating or tied to GND per layout guidelines |
| 5 | VCC | Supply input monitored for reset generation; absolute max rating -0.3V to +6V |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Reset Architecture | Enables μP to distinguish between external (supervisor) and internal (software fault) resets via timing-based protocol |
| Guaranteed Reset Validity to VCC = 1V | Ensures reliable reset assertion during deep brownout or battery discharge without external components |
| No External Components Required | Integrates precision voltage reference, reset timer, pullup resistor, and ESD protection - eliminates BOM count and layout area |
| Immunity to Short Negative VCC Transients | Withstands ≤4µs, 100mV-under-threshold glitches - avoids spurious resets in noisy power environments |
| AEC-Q100 Qualified | Validated for automotive-grade reliability and thermal cycling performance in harsh industrial settings |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Supervising power rails and reset sequencing in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Bidirectional reset supervisor ensuring deterministic startup and fault recovery while enabling μP-based root-cause analysis of reset events. Use Value: Eliminates need for external pullup and debounce circuitry; reduces PCB area by >2mm² versus discrete solutions. | Use Scenario: Monitoring 5V supply in body control units where reset integrity must be maintained across -40°C to +125°C and transient-heavy 12V battery systems. IC Role / Device Role / Timing Role: Power-on reset generator with manual reset override and AEC-Q100 validation for functional safety-critical subsystems. Use Value: Guarantees reset assertion down to VCC = 1V - critical for retaining EEPROM state during cold-crank battery dips. |
| Medical Infusion Pumps | Smart Energy Meters |
Use Scenario: Ensuring safe power-up and watchdog-free reset handling in battery-powered portable medical devices requiring long-term reliability and low quiescent current. IC Role / Device Role / Timing Role: Low-power supervisory IC providing precise 4.63V threshold detection and 140ms reset hold time for ARM Cortex-M based controllers. Use Value: 3µA typical supply current at 3.6V extends battery life beyond 10 years in always-on standby mode. | Use Scenario: Supervising microcontroller supply in utility meters exposed to wide ambient temperatures and conducted EMI from switching power supplies. IC Role / Device Role / Timing Role: Brownout detector with 4.63V threshold and 140ms timeout, supporting manual reset via front-panel button. Use Value: Internal MR pullup and 100ns glitch rejection eliminate need for RC debouncing network - simplifies certification testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6319LHUK46C+ | Active-low push/pull reset output instead of bidirectional; identical threshold, timeout, and MR functionality | Requires μP with dedicated active-low reset input; not compatible with bidirectional reset protocols like 68HC11 | Select when system μP lacks bidirectional reset capability and simpler push/pull drive suffices |
| TLV809KDBZR | Single-channel 4.63V supervisor with open-drain reset, no MR input, no bidirectional capability, lower IQ (0.5µA) | Lacks manual reset and bidirectional signaling; suited for cost-sensitive, non-automotive applications only | Choose only if MR and bidirectional features are unnecessary and ultra-low IQ is primary requirement |
Compared with MAX6319MHUK46C+, MAX6319LHUK46C+ provides identical supervision parameters but requires different μP reset interface design, while TLV809KDBZR sacrifices MR and bidirectional functionality for lower cost and quiescent current - making it unsuitable for 68HC11-based or field-serviceable systems.
Availability
MAX6319MHUK46C+ is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical infusion pumps requiring stable component supply, long-lifecycle assurance, and AEC-Q100-aligned reliability.
Supply support for MAX6319MHUK46C+ 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 power efficiency and integration.
The MAX6316–MAX6322 family delivers compact, factory-trimmed supervisory circuits targeting embedded systems needing precise voltage monitoring, manual reset, and bidirectional reset compatibility - especially where space, reliability, and μP-level fault diagnostics are critical.
FAQ
What is the reset threshold voltage of MAX6319MHUK46C+ and how stable is it over temperature?
The MAX6319MHUK46C+ has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±2.5% over the full operating range of -40°C to +125°C. Its reset threshold temperature coefficient is 40ppm/°C, meaning drift is tightly controlled and predictable - critical for maintaining consistent brownout behavior in thermally varying environments.
Does MAX6319MHUK46C+ include a watchdog timer function?
No, MAX6319MHUK46C+ does not include a watchdog timer. Per the Selector Guide and Electrical Characteristics tables in the official datasheet, MAX6319 variants (including MH and LH suffixes) are explicitly defined as having no watchdog input (WDI) functionality - unlike MAX6316/MAX6317/MAX6318 families. The "C" in the part number denotes the 140ms reset timeout, not watchdog capability.
How does the bidirectional reset output of MAX6319MHUK46C+ work with microcontrollers like the Motorola 68HC11?
The MAX6319MHUK46C+ bidirectional reset output combines a 4.7kΩ pullup resistor with an active P-channel FET to enable fast rising edges (<666ns). When the μP releases its reset line, the active pullup ensures RESET reaches 0.85×VCC within two clock cycles - allowing the 68HC11 to distinguish self-initiated resets from external ones. This eliminates ambiguity in reset-source identification without external components.
What is the maximum supply voltage and absolute minimum operating voltage for MAX6319MHUK46C+?
MAX6319MHUK46C+ operates from VCC = 1.0V to 5.5V, with absolute maximum ratings of -0.3V to +6V on VCC and all other pins except RESET (which tolerates -0.3V to +6V only on MAX6320/MAX6321/MAX6322). Its guaranteed reset assertion down to 1.0V ensures reliable operation during severe brownout or battery depletion scenarios.
Is MAX6319MHUK46C+ qualified for automotive applications?
MAX6319MHUK46C+ is AEC-Q100 qualified (Grade 3, -40°C to +125°C), confirming its suitability for automotive-adjacent applications such as body control modules and infotainment power supervisors. While not marked with "/V" (which denotes full automotive qualification), its AEC-Q100 qualification validates reliability under thermal cycling, humidity, and mechanical stress per automotive standards.
MAX6319MHUK46C+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Bi-Directional
- Reset:
- Active High/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
MAX6319MHUK46C+ FAQ
1.How can I place an order for MAX6319MHUK46C+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319MHUK46C+ 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 MAX6319MHUK46C+ reliable?
The price and inventory of MAX6319MHUK46C+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319MHUK46C+ is usually 5 days.
3.What payment methods are accepted for MAX6319MHUK46C+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319MHUK46C+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319MHUK46C+?
MAX6319MHUK46C+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319MHUK46C+ 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 MAX6319MHUK46C+?
For technical support, including MAX6319MHUK46C+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319MHUK46C+ requirements.
6.How does Aetrix verify that MAX6319MHUK46C+ is sourced from the original manufacturer or authorized distributors?
All MAX6319MHUK46C+ 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 MAX6319MHUK46C+ meets industry standards.
7.What is the process for return or replacement of MAX6319MHUK46C+?
All MAX6319MHUK46C+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319MHUK46C+, 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 MAX6319MHUK46C+ part is unused and in its original packaging.
Return procedure for MAX6319MHUK46C+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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