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Analog Devices Inc./Maxim Integrated MAX6314US26D4+T
- Part No.:
- MAX6314US26D4+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US26D4+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,541
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Product details
Overview
The MAX6314US26D4+T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit designed to monitor VCC supply voltage and assert a bidirectional reset signal for µPs with bidirectional reset I/Os (e.g., Motorola 68HC11). It features a factory-trimmed 2.63V reset threshold, 1120ms minimum reset timeout period, and operates across -40°C to +85°C in SOT143 package. Used in portable/battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6314US26D4+T datasheet, MAX6314US26D4+T pinout, MAX6314US26D4+T application, or MAX6314US26D4+T equivalent, key selection criteria include bidirectional RESET interface capability, ±2.5% reset threshold accuracy over temperature, 5µA supply current, immunity to short VCC transients, and compatibility with manual reset assertion without external debounce.
Technical Context
The MAX6314US26D4+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.63V reset threshold. Its reset timeout is fixed at ≥1120ms and generated by an internal timer that resets on every VCC dip below threshold or MR assertion.
The RESET output combines an n-channel pulldown, a p-channel active pullup, and a 4.7kΩ passive pullup-enabling direct connection to bidirectional µP reset pins while ensuring fast rise time (<350ns into 390pF) even with multiple devices on the bus. MR includes a 63kΩ internal pullup and accepts logic-low manual reset pulses ≥1µs wide.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH | 2.63V nominal reset threshold, ±2.5% over -40°C to +85°C - ensures accurate brownout detection for 2.7V–3.3V systems |
| tRP | ≥1120ms minimum reset timeout - guarantees sufficient hold time for full µP initialization after power recovery |
| ICC | 5µA typical supply current at +25°C - enables multi-year battery life in portable applications |
| RESET Output Type | Bidirectional with integrated 4.7kΩ pullup + p-channel active pullup - eliminates external components and supports 68HC11-style reset arbitration |
| MR Input | Logic-low active with 63kΩ internal pullup - allows momentary switch-to-GND connection without external R/C debounce |
| VCC Range | 1.0V to 5.5V operating range - supports operation down to near-zero VCC while maintaining valid RESET state |
| Immunity | Immune to VCC transients ≤100µs at 200mV overdrive - rejects noise spikes without false resets |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint and 0.95mm height; lead-free per RoHS, marked "FV" top-side for MAX6314US26D4+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor | Monitored node for brownout detection; powers internal circuitry; valid operation from 1.0V to 5.5V |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled low ≥1µs; open-circuit default is high |
| RESET | Bidirectional reset I/O | Open-drain-like output with integrated 4.7kΩ pullup + p-channel active pullup; sinks current when low, drives high via dual-path pullup |
| GND | Ground reference | Return path for VCC, MR, and RESET; must be low-impedance for accurate threshold sensing and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables µP-level reset source arbitration (e.g., 68HC11) without external level-shifting or pullup components |
| Factory-trimmed 2.63V threshold | Eliminates external resistor network; achieves ±2.5% accuracy over full temperature range without calibration |
| 1120ms reset timeout | Guarantees µP core, PLL, and peripherals fully stabilize before release - avoids race conditions in complex boot sequences |
| 5µA quiescent current | Reduces standby power in battery-backed systems; enables >10-year shelf life with CR2032 coin cell |
| Integrated MR pullup | Supports direct switch-to-GND manual reset; removes need for external pullup resistor and associated BOM line item |
Applications
| Portable Medical Monitor | Industrial PLC Controller |
|---|---|
|
Use Scenario: Battery-powered handheld ECG device with ARM Cortex-M4 MCU requiring guaranteed reset during Li-ion discharge from 3.6V to 2.7V. IC Role / Device Role / Timing Role: Supervisory IC monitoring VCC and asserting bidirectional RESET to ensure deterministic boot after brownout or button press. Use Value: 2.63V threshold aligns with end-of-discharge voltage; 1120ms timeout accommodates slow analog front-end stabilization; 5µA ICC extends battery runtime. |
Use Scenario: DIN-rail mounted PLC with multiple I/O modules sharing a common reset bus subject to EMI and capacitive loading. IC Role / Device Role / Timing Role: Central reset supervisor providing fast-rising RESET signal despite >200pF bus capacitance and noise coupling. Use Value: Active p-channel pullup + 4.7kΩ resistor ensures RESET rises to 0.8×VCC within two E-clock cycles (≤500ns @ 4MHz), enabling correct reset-source identification. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
|
Use Scenario: ANSI C12.22-compliant meter with real-time clock and secure bootloader, powered from split-phase AC via isolated DC/DC. IC Role / Device Role / Timing Role: Power supply monitor detecting undervoltage events on 3.3V rail caused by transformer sag or rectifier failure. Use Value: Immunity to ≤100µs VCC transients prevents spurious resets during line-cycle zero-crossing noise; ±2.5% VTH tolerance ensures compliance across temperature extremes. |
Use Scenario: 12V automotive system with local 3.3V domain supplying CAN transceiver and microcontroller, exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Reset generator asserting clean, glitch-free RESET during cold-crank (VCC dip to 2.5V) and recovering only after stable 3.3V is restored. Use Value: Valid RESET assertion down to VCC = 1.0V prevents metastability; 2.63V threshold avoids premature release during slow VCC ramp-up post-cold-crank. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US26D4+T | Open-drain RESET output (no active pullup); same 2.63V threshold and 1120ms timeout | Requires external 4.7kΩ pullup; incompatible with bidirectional reset arbitration protocols like 68HC11 | Select when µP uses unidirectional reset input and board space permits external resistor |
| TPS3808G26DBVR | Push-pull RESET output; 2.63V threshold; 1200ms timeout; 1.4µA ICC; supports watchdog functionality | Lacks MR input with internal pullup; no bidirectional RESET capability; higher integration but different reset signaling model | Select when lowest power is critical and bidirectional reset arbitration is not required |
Compared with MAX6314US26D4+T, MAX6315US26D4+T requires external pullup and cannot support reset-source identification, while TPS3808G26DBVR offers lower current and watchdog but omits MR pullup and bidirectional interface - making MAX6314US26D4+T uniquely suited for legacy 68HC11-based designs needing integrated manual reset and bus-friendly rise time.
Availability
MAX6314US26D4+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6314US26D4+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX6314 family delivers precision, low-power µP supervisory functions with factory-trimmed thresholds and bidirectional reset interfaces - engineered specifically for reliability-critical embedded systems where reset integrity directly impacts functional safety and field uptime.
FAQ
What is the exact reset threshold voltage for MAX6314US26D4+T?
The MAX6314US26D4+T has a factory-trimmed nominal reset threshold voltage of 2.63V, with ±2.5% accuracy over the full operating temperature range of -40°C to +85°C. This value is laser-trimmed during production and specified in the Electrical Characteristics table under VTH parameter; it is not adjustable or user-configurable.
Does MAX6314US26D4+T support bidirectional reset communication with the Motorola 68HC11?
Yes, the MAX6314US26D4+T is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and other µPs featuring bidirectional reset I/O pins. Its RESET output integrates both an n-channel pulldown and a p-channel active pullup in parallel with a 4.7kΩ resistor, enabling the µP to detect whether reset was asserted externally or self-initiated - a requirement for proper reset vector selection in the 68HC11 architecture.
What is the minimum reset timeout period for MAX6314US26D4+T?
The MAX6314US26D4+T provides a minimum reset timeout period (tRP) of 1120ms, as indicated by the "D4" suffix in the part number. This duration is internally programmed and guaranteed across temperature and supply voltage variations; typical values may exceed 1120ms but will never fall below this minimum, ensuring robust µP initialization timing.
Can MAX6314US26D4+T operate with VCC below 2.63V?
Yes, the MAX6314US26D4+T operates with VCC as low as 1.0V and maintains valid RESET output behavior down to that level. When VCC drops below 1.0V, RESET becomes high-impedance (open-circuit), but for VCC ≥1.0V, RESET is guaranteed to sink current and assert a logic-low state - enabling reliable reset assertion even during deep brownout conditions preceding complete power loss.
Is an external pullup resistor required for the MR pin on MAX6314US26D4+T?
No, an external pullup resistor is not required for the MR pin on MAX6314US26D4+T because it includes a factory-integrated 63kΩ internal pullup resistor. The MR pin is logic-low active and defaults to high when left unconnected; a normally open momentary switch from MR to GND is sufficient to implement manual reset functionality without additional components.
MAX6314US26D4+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US26D4+T FAQ
1.How can I place an order for MAX6314US26D4+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US26D4+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 MAX6314US26D4+T reliable?
The price and inventory of MAX6314US26D4+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US26D4+T is usually 5 days.
3.What payment methods are accepted for MAX6314US26D4+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US26D4+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US26D4+T?
MAX6314US26D4+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US26D4+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 MAX6314US26D4+T?
For technical support, including MAX6314US26D4+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US26D4+T requirements.
6.How does Aetrix verify that MAX6314US26D4+T is sourced from the original manufacturer or authorized distributors?
All MAX6314US26D4+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 MAX6314US26D4+T meets industry standards.
7.What is the process for return or replacement of MAX6314US26D4+T?
All MAX6314US26D4+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US26D4+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 MAX6314US26D4+T part is unused and in its original packaging.
Return procedure for MAX6314US26D4+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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