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Analog Devices Inc./Maxim Integrated MAX6314US26D2+T
- Part No.:
- MAX6314US26D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US26D2+T.pdf
- Description:
- IC RESET CIRCUIT 2.63V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,040
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Product details
Overview
MAX6314US26D2+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 compatible reset I/Os (e.g., 68HC11). It features a factory-trimmed 2.63V reset threshold, 20ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, 5µA supply current, and SOT143 package. It is used in portable/battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6314US26D2+T datasheet, MAX6314US26D2+T pinout, MAX6314US26D2+T application, or MAX6314US26D2+T equivalent, key selection criteria include bidirectional RESET compatibility, precise 2.63V threshold tolerance over temperature, 20ms timeout timing, immunity to short VCC transients, and absence of external components for pullup or trimming.
Technical Context
The MAX6314US26D2+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.63V reset threshold, and an internal one-shot timer that guarantees RESET remains asserted for ≥20ms after VCC rises above threshold or MR deasserts. Its RESET output combines a 4.7kΩ passive pullup resistor with a p-channel active pullup transistor, enabling fast rise time (<35ns typical) even under high capacitive load-critical for multi-device reset buses.
This architecture supports deterministic reset source identification in bidirectional-reset µPs like the 68HC11: the µP releases RESET and samples its state after two E-clock cycles; the MAX6314US26D2+T's active pullup ensures RESET reaches 0.8×VCC within that window, distinguishing self-initiated resets from external ones. MR input includes a 63kΩ internal pullup and 100ns glitch rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V ±1.8% at +25°C; enables accurate brownout detection for 2.7V–3.0V logic systems |
| Reset Timeout Period | ≥20ms; ensures µP completes power stabilization before release from reset |
| Supply Current | 5µA typical at +25°C; supports ultra-low-power battery operation over full -40°C to +85°C range |
| VCC Operating Range | 1.0V to 5.5V; allows monitoring of diverse supply rails including 1.8V, 2.5V, 3.3V, and 5V domains |
| RESET Output Type | Bidirectional with integrated 4.7kΩ pullup + p-channel active pullup; eliminates external components and solves rise-time issues on shared reset buses |
| MR Input Threshold | 0.3×VCC (max), 0.7×VCC (min); ensures robust noise margin and compatibility with standard CMOS logic levels |
| Tempco | 60ppm/°C; maintains threshold stability across industrial temperature range without calibration |
Pinout & Package
SOT143 package: 4-pin, surface-mount, lead-free (RoHS-compliant), -40°C to +85°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail connection; internally divided to generate 2.63V reference for reset assertion |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled low, holds reset for ≥20ms after release |
| RESET | Active-low bidirectional reset output | Combines n-channel pulldown, p-channel active pullup, and 4.7kΩ resistor; interfaces directly with 68HC11-style bidirectional reset pins |
| GND | Ground reference | Return path for all internal circuitry; must be low-impedance to ensure accurate threshold sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.63V threshold | Eliminates external resistor network and calibration; achieves ±1.8% accuracy at +25°C and ±2.5% over full temperature range |
| 20ms minimum reset timeout | Guarantees sufficient hold time for µP initialization and clock stabilization before release |
| Bidirectional RESET with active pullup | Enables reliable reset source discrimination in 68HC11-class µPs by ensuring RESET reaches 0.8×VCC within two E-clock cycles |
| 5µA quiescent current | Extends battery life in portable instruments and handheld controllers without compromising supervision reliability |
| Immunity to short VCC transients | Rejects glitches ≤100ns at 100mV overdrive, preventing spurious resets during switching noise or ESD events |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter requiring guaranteed reset during cold-start and brownout. IC Role / Device Role / Timing Role: Supervises 2.7V Li-ion supply and asserts bidirectional reset to ARM Cortex-M0 host µP. Use Value: 2.63V threshold matches nominal battery voltage sag profile; 5µA current minimizes standby drain; 20ms timeout accommodates slow LDO startup. |
Use Scenario: DIN-rail mounted controller exposed to 24V DC supply fluctuations in factory environments. IC Role / Device Role / Timing Role: Monitors regulated 3.3V domain feeding FPGA and communication ICs; provides synchronized reset pulse on power recovery. Use Value: ±2.5% threshold accuracy over -40°C to +85°C ensures consistent trip point despite ambient swings; MR input enables front-panel reset button integration. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Revenue-grade meter with dual-supply architecture (3.3V MCU + 1.2V RF SoC) needing coordinated reset sequencing. IC Role / Device Role / Timing Role: Primary supervisor for 3.3V rail; RESET output drives both µP and secondary supervisor enable line. Use Value: Bidirectional RESET allows µP to initiate watchdog-triggered reset while preserving external reset detection capability; no external pullup required saves BOM cost. |
Use Scenario: Low-voltage subsystem (e.g., door module) powered from vehicle battery with transient-heavy 12V-to-3.3V conversion. IC Role / Device Role / Timing Role: Monitors post-regulator 3.3V rail; asserts reset during cranking-induced dips below 2.63V. Use Value: 100ns MR glitch rejection prevents false triggers from ignition noise; 60ppm/°C tempco maintains accuracy across under-hood thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US26D2+T | Open-drain RESET output (no internal pullup or active pullup); requires external 4.7kΩ pullup resistor | Lacks bidirectional reset support; unsuitable for 68HC11-style µPs requiring active pullup for reset source identification | Select only if target µP uses open-drain reset input and board layout already includes pullup; otherwise MAX6314US26D2+T provides superior integration. |
| TPS3808G26DBVR | Fixed 2.63V threshold, 20ms timeout, but push-pull RESET output (not bidirectional); 1.5µA typical ICC | Cannot interface with bidirectional-reset µPs; requires level-shifting or external logic for 68HC11 compatibility | Preferable for ultra-low-power designs where bidirectional functionality is unnecessary and push-pull drive simplifies routing. |
Compared with MAX6314US26D2+T, MAX6315US26D2+T lacks integrated pullup and cannot support bidirectional reset arbitration, while TPS3808G26DBVR offers lower current but omits the critical p-channel active pullup needed for fast rise-time on shared reset lines-making MAX6314US26D2+T uniquely suited for legacy µP interfaces.
Availability
MAX6314US26D2+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, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6314US26D2+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 analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX6314 family was designed specifically for microprocessor supervision in space-constrained, low-power systems requiring precise voltage monitoring and bidirectional reset compatibility-targeting legacy and modern µP platforms alike.
FAQ
What is the exact reset threshold voltage of the MAX6314US26D2+T?
The MAX6314US26D2+T has a factory-trimmed nominal reset threshold of 2.63V, with ±1.8% accuracy at +25°C and ±2.5% over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and specified in the Electrical Characteristics table of the official datasheet.
Does the MAX6314US26D2+T require an external pullup resistor on the RESET pin?
No, the MAX6314US26D2+T does not require an external pullup resistor. Its RESET output integrates a 4.7kΩ passive pullup resistor in parallel with a p-channel active pullup transistor, enabling direct interface with bidirectional-reset µPs like the 68HC11 without additional components.
What is the minimum reset timeout period for the MAX6314US26D2+T?
The MAX6314US26D2+T has a minimum reset timeout period of 20ms. This is the guaranteed duration RESET remains asserted after VCC rises above 2.63V or after the manual reset (MR) input is deasserted, ensuring sufficient time for microprocessor power stabilization.
Can the MAX6314US26D2+T be used with microprocessors other than the 68HC11?
Yes, the MAX6314US26D2+T is compatible with any microprocessor or microcontroller featuring a bidirectional reset input that accepts active-pullup-driven signals, including derivatives of the 68HC11, certain Renesas H8 devices, and custom ASICs designed for similar reset arbitration protocols.
Is the MAX6314US26D2+T RoHS-compliant and lead-free?
Yes, the MAX6314US26D2+T is RoHS-compliant and supplied in lead-free packaging. The "+T" suffix explicitly denotes lead-free termination per JEDEC J-STD-020, and the device meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 requirements.
MAX6314US26D2+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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US26D2+T FAQ
1.How can I place an order for MAX6314US26D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US26D2+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 MAX6314US26D2+T reliable?
The price and inventory of MAX6314US26D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US26D2+T is usually 5 days.
3.What payment methods are accepted for MAX6314US26D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US26D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US26D2+T?
MAX6314US26D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US26D2+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 MAX6314US26D2+T?
For technical support, including MAX6314US26D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US26D2+T requirements.
6.How does Aetrix verify that MAX6314US26D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6314US26D2+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 MAX6314US26D2+T meets industry standards.
7.What is the process for return or replacement of MAX6314US26D2+T?
All MAX6314US26D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US26D2+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 MAX6314US26D2+T part is unused and in its original packaging.
Return procedure for MAX6314US26D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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