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Analog Devices Inc./Maxim Integrated MAX6319MHUK29C-T
- Part No.:
- MAX6319MHUK29C-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6319MHUK29C-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,537
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Product details
Overview
MAX6319MHUK29C-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low bidirectional reset output, 2.93V 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 brownout detection and manual reset capability.
For engineers reviewing the MAX6319MHUK29C-T datasheet, MAX6319MHUK29C-T pinout, MAX6319MHUK29C-T application, or MAX6319MHUK29C-T equivalent, key selection criteria include bidirectional reset compatibility, guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients, and AEC-Q100 qualification for automotive-adjacent industrial use.
Technical Context
The MAX6319MHUK29C-T implements a bidirectional reset architecture with integrated 4.7kΩ pullup resistor and active P-channel 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 2.93V ±2.5%, after MR low-to-high transition, or upon power-up.
No watchdog functionality is present - WDI pin is omitted per part number suffix "MH" (Manual Reset + Bidirectional Active-Low Reset only). The device features internal MR pullup (52kΩ), 100ns MR glitch rejection, and operates across -40°C to +125°C with supply voltage range 1.0V–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over -40°C to +125°C - ensures reliable brownout detection at nominal 3.3V rail |
| Reset Timeout Period | 140ms minimum - holds reset long enough for full microprocessor initialization after power recovery |
| Supply Current | 3–8µA at VCC = 3.6V - enables battery-powered operation with negligible quiescent drain |
| Operating Temperature | -40°C to +125°C - supports under-hood, industrial, and extended-temperature embedded applications |
| Reset Output Type | Active-Low Bidirectional - compatible with Motorola 68HC11 and similar µPs requiring external pullup-aware reset signaling |
| VCC Range | 1.0V to 5.5V - guarantees valid reset assertion down to near-undervoltage condition |
| AEC-Q100 Qualified | Yes - meets stress test requirements for automotive electronics, including temperature cycling and HTOL |
Pinout & Package
MAX6319MHUK29C-T is housed in a 5-pin SOT23 package (package code U5+2A, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Bidirectional RESET | Active-low open-drain–like output with integrated 4.7kΩ pullup + active P-FET; sinks current when asserted, rises rapidly when released |
| 2 | GND | Ground reference for all internal circuitry and reset timing accuracy |
| 3 | MR | Active-low manual reset input with 52kΩ internal pullup; 100ns glitch rejection; asserts reset for full 140ms timeout upon release |
| 4 | NC | No connect - pin 4 is unused and must be left floating or grounded per layout best practice |
| 5 | VCC | Supply input monitored for reset generation; valid operation from 1.0V to 5.5V; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET with active pullup | Enables reliable reset source identification in 68HC11-class µPs by ensuring RESET reaches 0.85×VCC within two clock cycles, even with >250pF bus capacitance |
| Factory-trimmed 2.93V threshold | Matches common 3.3V system rails with ±2.5% tolerance over full temperature range - eliminates external resistor divider |
| Guaranteed reset down to VCC = 1V | Ensures deterministic reset behavior during deep brownout or battery sag, preventing runaway code execution |
| Immunity to short VCC transients | Rejects ≤4µs negative glitches down to 100mV below VRST - avoids spurious resets in noisy power environments |
| AEC-Q100 qualified | Validated for automotive-grade reliability without derating - suitable for industrial control, telematics, and ADAS-adjacent modules |
Applications
| Motorola 68HC11-Based Control Units | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Microcontroller-based motor drive controller using Motorola 68HC11 with bidirectional reset pin. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and manual reset - synchronizes reset vector selection via bidirectional timing handshake. Use Value: Enables µP to distinguish self-caused vs. external resets, preserving fault context for diagnostics without external timing components. |
Use Scenario: DIN-rail mounted programmable logic controller with isolated I/O and 24V DC input. IC Role / Device Role / Timing Role: System-level reset supervisor monitoring 3.3V logic rail; asserts reset during undervoltage or operator-initiated restart. Use Value: 140ms timeout ensures FPGA configuration and peripheral initialization complete before firmware execution begins. |
| Automotive Body Control Modules | Battery-Powered Data Loggers |
|
Use Scenario: Low-power BCM managing door locks, lighting, and window controls in 12V vehicle electrical system. IC Role / Device Role / Timing Role: AEC-Q100-qualified supervisory circuit monitoring 3.3V domain; triggers reset during cold-crank voltage dip below 2.93V. Use Value: Guaranteed operation down to VCC = 1V prevents latch-up during cranking transients; bidirectional output supports legacy µP reset protocols. |
Use Scenario: Portable environmental sensor node powered by coin cell with 10-year operational life requirement. IC Role / Device Role / Timing Role: Ultra-low-current (3µA typical) reset supervisor ensuring clean boot after battery insertion or wake-from-sleep event. Use Value: Eliminates need for external reset RC network - reduces BOM count and PCB area while maintaining 2.93V precision threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6319LHUK29C-T | Active-low push/pull reset output (not bidirectional); identical reset threshold, timeout, and MR functionality | Requires external pullup if interfacing with bidirectional µP; unsuitable for 68HC11-style reset arbitration | Select when driving standard CMOS reset inputs without bidirectional timing constraints |
| TLV803EB29DBZR | Single-channel supervisor with 2.93V threshold, 140ms timeout, push/pull active-low reset; no MR input; 1.8–6V VCC range | Lacks manual reset and bidirectional capability; lower supply current (0.5µA) but no AEC-Q100 qualification | Choose for cost-sensitive, non-automotive applications where MR and bidirectional timing are unnecessary |
Compared with MAX6319MHUK29C-T, MAX6319LHUK29C-T offers simpler reset drive but cannot support µP reset-source discrimination, while TLV803EB29DBZR reduces quiescent current significantly but sacrifices MR functionality, AEC-Q100 compliance, and bidirectional interface capability.
Availability
MAX6319MHUK29C-T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and battery-powered data loggers requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified supervision.
Supply support for MAX6319MHUK29C-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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6316–MAX6322 family delivers highly configurable µP supervision with factory-trimmed thresholds, multiple reset architectures, and AEC-Q100 qualification - targeting safety-critical embedded systems where deterministic reset behavior is mandatory.
FAQ
What is the reset output configuration of MAX6319MHUK29C-T?
The MAX6319MHUK29C-T features an active-low bidirectional reset output designed specifically for microprocessors like the Motorola 68HC11. It combines a 4.7kΩ pullup resistor with an active P-channel FET to ensure rapid rise time and reliable reset-source arbitration - unlike push/pull or open-drain variants, this configuration allows the µP to determine whether reset was initiated internally or externally based on timing behavior.
Does MAX6319MHUK29C-T include a watchdog timer?
No, MAX6319MHUK29C-T does not include a watchdog timer. The "MH" suffix in the part number indicates Manual Reset + Bidirectional Active-Low Reset only. Watchdog functionality is absent - the WDI pin is not implemented, and no watchdog timeout periods are specified. For watchdog-capable alternatives in the same family, consider MAX6318MHUK29C-T or MAX6322HPUK29C-T.
What is the guaranteed operating voltage range for MAX6319MHUK29C-T?
MAX6319MHUK29C-T operates over a supply voltage range of 1.0V to 5.5V. Crucially, its reset output remains valid down to VCC = 1V - meaning the RESET signal maintains correct logic levels even during severe brownout conditions. This guarantee is critical for fail-safe behavior in battery-powered or automotive applications where supply voltage may collapse gradually.
How does the manual reset (MR) input function on MAX6319MHUK29C-T?
The MR input on MAX6319MHUK29C-T is an active-low signal with internal 52kΩ pullup. Pulling MR low forces a reset that remains asserted for the full 140ms timeout period after MR returns high. It rejects 100ns glitches and requires no external debouncing. MR is compatible with TTL/CMOS logic and can be driven by a momentary switch to ground - making it ideal for field-service reset buttons in industrial equipment.
Is MAX6319MHUK29C-T qualified for automotive applications?
Yes, MAX6319MHUK29C-T is AEC-Q100 qualified (Grade 1: -40°C to +125°C), meeting stress test requirements for automotive electronics including temperature cycling, HTOL, and ESD. While not labeled with "/V" automotive suffix, its qualification extends its suitability to body control modules, telematics gateways, and other automotive-adjacent industrial systems requiring high-reliability supervision.
MAX6319MHUK29C-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:
- 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
MAX6319MHUK29C-T FAQ
1.How can I place an order for MAX6319MHUK29C-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6319MHUK29C-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 MAX6319MHUK29C-T reliable?
The price and inventory of MAX6319MHUK29C-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6319MHUK29C-T is usually 5 days.
3.What payment methods are accepted for MAX6319MHUK29C-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6319MHUK29C-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6319MHUK29C-T?
MAX6319MHUK29C-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6319MHUK29C-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 MAX6319MHUK29C-T?
For technical support, including MAX6319MHUK29C-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6319MHUK29C-T requirements.
6.How does Aetrix verify that MAX6319MHUK29C-T is sourced from the original manufacturer or authorized distributors?
All MAX6319MHUK29C-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 MAX6319MHUK29C-T meets industry standards.
7.What is the process for return or replacement of MAX6319MHUK29C-T?
All MAX6319MHUK29C-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6319MHUK29C-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 MAX6319MHUK29C-T part is unused and in its original packaging.
Return procedure for MAX6319MHUK29C-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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