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Analog Devices Inc./Maxim Integrated MAX6414UK35+T
- Part No.:
- MAX6414UK35+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6414UK35+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,056
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Product details
Overview
The MAX6414UK35+T from Maxim Integrated is a low-power microprocessor supervisor IC with fixed 3.5V VCC reset threshold, manual reset input (MR), and active-low open-drain RESET output. It monitors supply voltage in systems from 1.6V to 5V, asserts reset during brownout or power-up/down events, and uses an external capacitor on SRT pin to set reset timeout (3.0–5.75ms typical). It is used in automotive ECUs and battery-powered controllers requiring reliable, AEC-Q100-compatible reset supervision.
For engineers reviewing the MAX6414UK35+T datasheet, MAX6414UK35+T pinout, MAX6414UK35+T application, or MAX6414UK35+T equivalent, key selection criteria include its 3.5V ±2.5% reset threshold accuracy over –40°C to +125°C, 1.7µA typical quiescent current at 2V, guaranteed RESET validity down to VCC = 1V, open-drain output compatibility with mixed-voltage µP interfaces, and SOT23-5 package suitability for space-constrained embedded designs.
Technical Context
The MAX6414UK35+T implements a precision bandgap-based voltage comparator for VCC monitoring, paired with a 240nA constant-current ramp generator driving the SRT pin to produce a capacitor-timed reset timeout. Its internal 20kΩ MR pullup enables momentary-switch manual reset without external components.
Unlike push-pull variants, the open-drain RESET output allows wired-OR configuration and logic-level translation across supplies up to 5.5V via external pullup-critical for interfacing with diverse µP reset inputs. The device guarantees valid reset assertion even as VCC drops to 1V, supporting robust operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.500V ±2.5% (–40°C to +125°C); ensures reliable detection of 3.3V rail collapse before µP malfunction. |
| Quiescent Current | 1.7µA typ at VCC ≤ 2.0V; enables multi-year operation in coin-cell–powered backup supervisors. |
| Reset Timeout Period | 3.00–5.75ms with 1500pF SRT capacitor; programmable delay prevents premature µP release during unstable power ramp. |
| RESET Output Type | Active-low open-drain; supports flexible pullup to any voltage ≤5.5V for mixed-supply system integration. |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial control environments. |
| Supply Voltage Range | 1.0V to 5.5V; maintains functional reset assertion even during severe undervoltage (e.g., battery sag to 1.0V). |
| MR Input Logic | CMOS-compatible with internal 20kΩ pullup; eliminates need for external resistor in manual reset switch implementation. |
Pinout & Package
SOT23-5 package: ultra-compact surface-mount outline (2.9mm × 1.6mm × 1.1mm), RoHS-compliant lead-free (+T suffix), thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives µP reset input low; requires external pullup; sinks ≥500µA at VCC ≥ 1.8V for solid logic low. |
| 2 - GND | Ground reference | Primary return path for internal comparators and ramp current source; must be low-impedance. |
| 3 - MR | Manual reset input | Logic-low assertion forces reset; internal 20kΩ pullup allows NC default; 1µs minimum pulse width. |
| 4 - SRT | Set reset timeout input | Connects to external timing capacitor; 240nA constant current charges CSRT to 0.65V for timeout calculation. |
| 5 - VCC | Supply voltage and monitored rail | Powers device and serves as primary monitored voltage; reset asserted if VCC falls below 3.5V ±2.5%. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise tailoring of reset hold time (275µs to >100ms) using standard ceramic capacitors-no trimming required. |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout, eliminating race conditions in low-VCC µP initialization. |
| Open-drain RESET with 5.5V tolerance | Permits direct interface to 1.8V, 3.3V, or 5V µP reset inputs using appropriate pullup voltage-no level shifter needed. |
| Power-supply transient immunity | Rejects VCC glitches ≤100mV amplitude and ≤50µs duration, preventing spurious resets in noisy automotive/industrial environments. |
| AEC-Q100 qualified option | MAX6414UK35/V+T variant available; meets stress testing requirements for automotive electronics (Grade 0: –40°C to +125°C). |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Infusion Pump |
|---|---|
Use Scenario: Monitors 3.3V microcontroller supply during cold-cranking and load-dump transients. IC Role / Device Role / Timing Role: Supervisor IC asserting active-low reset to ARM Cortex-M7 µP until stable 3.3V rail is confirmed. Use Value: Prevents code corruption during 12V battery dip to 6V by holding reset for 4.375ms (1500pF SRT cap) while VCC recovers above 3.5V. |
Use Scenario: Ensures safe restart after battery swap or low-battery shutdown in Class II medical device. IC Role / Device Role / Timing Role: Resets safety-critical PIC32MX µP upon insertion of fresh AA batteries; manual reset via front-panel button. Use Value: 1.7µA quiescent current extends shelf life; open-drain RESET pulled to 3.3V enables clean interface with isolated µP domain. |
| Industrial PLC I/O Module | Smart Energy Meter MCU |
Use Scenario: Supervises dual-rail 5V analog and 3.3V digital supplies in DIN-rail mounted controller. IC Role / Device Role / Timing Role: Single-supply supervisor for 3.3V domain; MR pin tied to watchdog timer output for autonomous recovery. Use Value: Internal MR pullup eliminates BOM cost; -40°C to +125°C rating ensures reliability in uncooled enclosures. |
Use Scenario: Provides brownout protection during grid voltage sags in AMI meter with real-time clock backup. IC Role / Device Role / Timing Role: Resets MSP430FR59xx µP when main 3.3V supply drops below 3.5V; SRT capacitor sets 5ms hold time. Use Value: Guaranteed RESET assertion at VCC = 1.0V prevents flash corruption during final battery discharge phase. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6413UK35+T | Identical 3.5V threshold and SOT23-5 package, but features active-high push-pull RESET output. | Requires µP with active-high reset input; no external pullup needed, but incompatible with wired-OR reset buses. | Select when system architecture mandates active-high assertion and no multi-source reset arbitration is required. |
| TLV809K33DBZR | Fixed 3.08V reset threshold, 1.6µA IQ, SOT23-3 package, no MR pin or adjustable timeout. | Lacks manual reset and capacitor-programmable delay; suited only for basic power-on reset without recovery flexibility. | Choose for cost-sensitive, space-constrained designs where fixed 3.08V threshold and minimal feature set suffice. |
Compared with MAX6413UK35+T, the MAX6414UK35+T's open-drain output enables shared reset busing and voltage-level translation, while TLV809K33DBZR trades configurability for smaller footprint and lower unit cost-making each suitable for distinct system-level trade-offs in reset architecture design.
Availability
The MAX6414UK35+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical devices, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6414UK35+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 demanding industrial, automotive, and medical applications, with emphasis on low-power, high-reliability performance.
The MAX6412–MAX6420 family delivers configurable µP reset supervision targeting systems needing accurate voltage monitoring, programmable timeout, and robust operation across harsh environmental conditions.
FAQ
What is the exact reset threshold voltage of the MAX6414UK35+T?
The MAX6414UK35+T has a factory-trimmed VCC reset threshold of 3.500V, with ±1.25% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This value is confirmed in the Electrical Characteristics table of the official datasheet (Rev 11, July 2019), and corresponds to the "35" suffix per the Reset Voltages Suffix Table.
Does the MAX6414UK35+T support manual reset functionality?
Yes, the MAX6414UK35+T includes a dedicated MR (manual reset) input on Pin 3. Pulling MR low asserts the active-low RESET output for the full timeout period, even if VCC remains above threshold. An internal 20kΩ pullup resistor allows the pin to be left unconnected when unused, and a momentary switch to ground suffices for operator-initiated reset.
How is the reset timeout period set on the MAX6414UK35+T?
The reset timeout period on the MAX6414UK35+T is set by connecting an external capacitor (CSRT) between Pin 4 (SRT) and ground. The timeout follows tRP = (2.71 × 10⁶) × CSRT + 275µs, yielding 3.00–5.75ms for a 1500pF capacitor. Ceramic capacitors with leakage <10nA are recommended to maintain accuracy.
Can the MAX6414UK35+T be used in automotive applications?
Yes-the MAX6414UK35+T is offered in an AEC-Q100 qualified variant (MAX6414UK35/V+T) rated for –40°C to +125°C operation. While the base MAX6414UK35+T is not automotive-qualified, its full temperature range, transient immunity, and 1.7µA quiescent current make it suitable for non-safety-critical automotive subsystems such as infotainment or body control modules.
What is the maximum supply voltage the MAX6414UK35+T can tolerate on its RESET pin?
The MAX6414UK35+T RESET pin (Pin 1) is an open-drain output rated for voltages up to +6.0V, independent of VCC. This allows connection to external pullup supplies as high as 5.5V-enabling interoperability with µPs operating at different logic levels without additional level-shifting circuitry.
MAX6414UK35+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:
- 3.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6414UK35+T FAQ
1.How can I place an order for MAX6414UK35+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6414UK35+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 MAX6414UK35+T reliable?
The price and inventory of MAX6414UK35+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6414UK35+T is usually 5 days.
3.What payment methods are accepted for MAX6414UK35+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6414UK35+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6414UK35+T?
MAX6414UK35+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6414UK35+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 MAX6414UK35+T?
For technical support, including MAX6414UK35+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6414UK35+T requirements.
6.How does Aetrix verify that MAX6414UK35+T is sourced from the original manufacturer or authorized distributors?
All MAX6414UK35+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 MAX6414UK35+T meets industry standards.
7.What is the process for return or replacement of MAX6414UK35+T?
All MAX6414UK35+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6414UK35+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 MAX6414UK35+T part is unused and in its original packaging.
Return procedure for MAX6414UK35+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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