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Analog Devices Inc./Maxim Integrated MAX6314US44D1
- Part No.:
- MAX6314US44D1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US44D1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:5,063
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Product details
Overview
MAX6314US44D1 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/O (e.g., Motorola 68HC11). It features a factory-trimmed 4.39V reset threshold, 1ms 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 MAX6314US44D1 datasheet, MAX6314US44D1 pinout, MAX6314US44D1 application, or MAX6314US44D1 equivalent, key selection considerations include its bidirectional RESET output architecture, 4.39V precision threshold, 1ms timeout, immunity to short VCC transients, and compatibility with legacy µP reset protocols requiring active pullup support.
Technical Context
The MAX6314US44D1 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 4.39V nominal reset threshold, with ±2.5% accuracy over –40°C to +85°C. Its RESET output combines an n-channel pulldown, a p-channel active pullup transistor, and a 4.7kΩ passive pullup resistor-enabling direct interface to bidirectional reset pins without external components.
It integrates a transition edge flip-flop and 2µs one-shot timer to ensure fast RESET rise time (<350ns typical into 100pF) even under high capacitive load conditions. The manual reset input (MR) includes a 63kΩ internal pullup and 100ns glitch rejection, supporting debounced push-button reset without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.39V nominal, ±1.8% at +25°C - ensures accurate brownout detection for 4.5V–5V systems |
| Reset Timeout Period | 1ms minimum - guarantees sufficient reset assertion time for safe µP initialization |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-backed applications |
| RESET Output Type | Bidirectional with integrated 4.7kΩ pullup + p-channel active pullup - eliminates need for external pullup and supports 68HC11-style reset handshaking |
| MR Input Threshold | 0.3×VCC max - ensures robust low-level recognition of manual reset assertion |
| VCC Operating Range | 1.0V to 5.5V - allows operation during deep brownout and across wide supply rails |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive-adjacent embedded environments |
Pinout & Package
SOT143 (4-pin, 1.3mm × 2.9mm, 0.95mm height), surface-mount package with exposed pad option; lead-free and leaded variants available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail connection; internally monitored to trigger reset when falling below 4.39V |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled low, no external debounce required |
| RESET | Bidirectional reset output | Open-drain-compatible output with integrated 4.7kΩ pullup + p-channel active pullup; sinks current and drives high to support µP bidirectional reset handshake |
| GND | Ground reference | Return path for all internal circuitry and reset comparator reference |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 4.39V ±1.8% at +25°C - eliminates calibration overhead and external resistor networks |
| Bidirectional RESET architecture | Integrated 4.7kΩ pullup + p-channel active pullup - enables direct interface to 68HC11 and similar µPs without timing violations on multi-device reset buses |
| Ultra-low quiescent current | 5µA typical - extends battery life in portable instrumentation and remote sensors |
| Immunity to short VCC transients | Rejects <100ns glitches down to 40mV below threshold - prevents spurious resets in noisy power environments |
| Debounced manual reset input | 100ns minimum pulse width requirement + internal 63kΩ pullup - supports simple momentary switch interface with no external RC network |
Applications
| Portable Medical Monitor | Industrial PLC Controller |
|---|---|
|
Use Scenario: Battery-powered handheld ECG device operating from 3.3V/5V dual-rail supply with strict uptime requirements. IC Role / Device Role / Timing Role: Monitors main 5V rail and asserts bidirectional RESET to ARM Cortex-M4 MCU during brownout or power-up sequencing. Use Value: Ensures deterministic reset state before firmware execution; 5µA current draw preserves 10+ hour battery runtime; 4.39V threshold precisely matches 5V rail tolerance. |
Use Scenario: DIN-rail mounted programmable logic controller with isolated I/O and real-time Ethernet connectivity. IC Role / Device Role / Timing Role: Supervises 5V system rail and provides synchronized reset to multiple µPs and FPGA configuration logic. Use Value: Bidirectional RESET supports coordinated reset handshaking between host µP and peripheral controllers; 1ms timeout aligns with FPGA configuration clock startup timing. |
| Smart Energy Meter | Automotive Diagnostic Tool |
|
Use Scenario: ANSI C12.22-compliant electricity meter with tamper-detection circuitry and backup supercapacitor. IC Role / Device Role / Timing Role: Detects VCC sag during capacitor discharge and triggers controlled shutdown/reset sequence via MR and RESET lines. Use Value: ±2.5% threshold stability over temperature ensures consistent brownout response across –25°C to +70°C field operating range; MR input enables hardware-initiated recalibration reset. |
Use Scenario: Handheld OBD-II scanner powered by vehicle battery (9V–16V) with USB-C host interface and internal Li-ion backup. IC Role / Device Role / Timing Role: Monitors regulated 5V supply derived from buck converter and asserts RESET to STM32 host MCU during ignition-cycle voltage dips. Use Value: Immunity to 100ns transients prevents false resets during alternator switching noise; 4.39V threshold avoids nuisance triggering during normal 12V system ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US44D1-T | Open-drain RESET output (no active pullup); identical 4.39V threshold and 1ms timeout | Requires external 4.7kΩ pullup; not compatible with bidirectional reset protocols like 68HC11 | Select only if target µP uses standard open-drain reset input and board layout already includes pullup resistor |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; 20ms default timeout; push-pull RESET output; 1.5µA IQ | Designed for 3.3V systems; lacks bidirectional capability and manual reset input | Use only in new 3.3V designs where bidirectional handshake is unnecessary and lowest possible quiescent current is critical |
Compared with MAX6314US44D1, MAX6315US44D1 omits the active pullup and requires external biasing, while TPS3808G33DBVR targets lower-voltage systems with different timing and interface constraints-neither offers the same combination of 4.39V precision, 1ms timeout, and bidirectional reset support in SOT143.
Availability
MAX6314US44D1 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, smart energy meters, and automotive diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX6314US44D1 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 series was designed specifically for microprocessor supervision in resource-constrained embedded systems requiring precision voltage monitoring, bidirectional reset compatibility, and ultra-low power consumption-targeting legacy and modern µP platforms alike.
FAQ
What is the exact reset threshold voltage for MAX6314US44D1?
The MAX6314US44D1 has a factory-trimmed nominal reset threshold of 4.39V, 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 manufacturing and confirmed in the Ordering Information table; it is specific to the "US44" variant and distinct from other members of the MAX6314 family.
Does MAX6314US44D1 support bidirectional reset communication with the Motorola 68HC11?
Yes, MAX6314US44D1 is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and similar µPs. Its RESET output integrates a 4.7kΩ pullup resistor and a p-channel active pullup transistor, enabling the µP to detect whether reset was initiated externally (by MAX6314US44D1) or internally (e.g., watchdog timeout), per the 68HC11's two-E-clock sampling protocol.
What is the minimum reset timeout period for MAX6314US44D1?
The MAX6314US44D1 has a minimum reset timeout period of 1ms, as indicated by the "D1" suffix in its part number. This value is guaranteed over temperature and supply voltage, and defines the minimum duration RESET remains asserted after VCC rises above 4.39V or after MR is deasserted.
Can MAX6314US44D1 operate with VCC as low as 1.0V?
Yes, MAX6314US44D1 operates across a VCC range of 1.0V to 5.5V. Below 1.0V, RESET becomes high-impedance (open-circuit), but down to 1.0V the device maintains valid reset assertion and monitoring functionality-including guaranteed RESET low-state sinking capability and accurate threshold comparison.
Is an external pullup resistor required for the RESET pin of MAX6314US44D1?
No, an external pullup resistor is not required for the RESET pin of MAX6314US44D1. The device integrates both a 4.7kΩ passive pullup resistor and a p-channel active pullup transistor, enabling direct connection to bidirectional µP reset inputs without additional components-this is a core design feature confirmed in the Functional Diagram and Pin Description sections.
MAX6314US44D1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.39V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-4
MAX6314US44D1 FAQ
1.How can I place an order for MAX6314US44D1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US44D1 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 MAX6314US44D1 reliable?
The price and inventory of MAX6314US44D1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US44D1 is usually 5 days.
3.What payment methods are accepted for MAX6314US44D1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US44D1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US44D1?
MAX6314US44D1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US44D1 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 MAX6314US44D1?
For technical support, including MAX6314US44D1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US44D1 requirements.
6.How does Aetrix verify that MAX6314US44D1 is sourced from the original manufacturer or authorized distributors?
All MAX6314US44D1 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 MAX6314US44D1 meets industry standards.
7.What is the process for return or replacement of MAX6314US44D1?
All MAX6314US44D1 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US44D1, 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 MAX6314US44D1 part is unused and in its original packaging.
Return procedure for MAX6314US44D1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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