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Analog Devices Inc./Maxim Integrated MAX6314US43D2+T
- Part No.:
- MAX6314US43D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US43D2+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,642
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Product details
Overview
MAX6314US43D2+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., 68HC11). It features a factory-trimmed 4.30V 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 MAX6314US43D2+T datasheet, MAX6314US43D2+T pinout, MAX6314US43D2+T application, or MAX6314US43D2+T equivalent, key selection criteria include bidirectional RESET compatibility, precise 4.30V threshold tolerance, 20ms timeout timing, immunity to short VCC transients, and absence of external components for manual reset debouncing.
Technical Context
The MAX6314US43D2+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set its 4.30V reset threshold, operating across -40°C to +85°C with ±2.5% total accuracy over temperature. Its reset generator includes an internally programmed 20ms timeout timer that restarts on every VCC dip below threshold or MR assertion.
The RESET output combines a 4.7kΩ pull-up resistor and a P-channel active pullup transistor in parallel with an N-channel pulldown - enabling direct interface to bidirectional µP reset pins while ensuring fast rise time (<35µs typical) even under 390pF load and multi-device bus conditions. MR has a 63kΩ internal pullup and accepts logic-low manual reset pulses as short as 100ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.30V nominal, ±1.8% at +25°C - ensures accurate brownout detection at defined supply rail |
| Reset Timeout Period | 20ms minimum - guarantees sufficient reset assertion duration for safe µP initialization |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-critical systems |
| VCC Operating Range | 1.0V to 5.5V - supports operation down to near-dead-battery conditions before reset release |
| MR Input Threshold | 0.3 × VCC max - ensures robust noise immunity and clean low-to-high transition recognition |
| RESET Output Structure | Bidirectional with 4.7kΩ passive + P-channel active pullup - eliminates need for external pullup and enables µP-driven reset arbitration |
| Tempco | 60ppm/°C - maintains tight threshold stability across industrial temperature range |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.1mm footprint, -40°C to +85°C operating range, lead-free compliant (denoted by "+T" suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor node | Monitored directly by internal voltage divider; powers internal circuitry and defines reset trigger point |
| MR | Manual reset input | Logic-low active; internally pulled up to VCC via 63kΩ; requires no external debounce components |
| RESET | Bidirectional reset output | Combines N-channel pulldown + P-channel active pullup + 4.7kΩ resistor - supports µP-initiated reset and supervisor-initiated reset on shared bus |
| GND | Ground reference | Return path for all internal current sources and comparator references; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables µP-originated reset assertion and source discrimination (e.g., 68HC11), eliminating ambiguity in multi-source reset systems |
| Factory-trimmed 4.30V threshold | Eliminates external resistor network and calibration; achieves ±1.8% accuracy at room temperature without user adjustment |
| 20ms minimum reset timeout | Guarantees µP core and peripherals fully stabilize before release - prevents premature code execution during power ramp |
| 5µA quiescent current | Extends battery life in portable instruments and handheld controllers where standby current dominates lifetime energy budget |
| Immunity to sub-100ns VCC transients | Rejects EMI-induced glitches without false resets - validated per Typical Operating Characteristics Figure MAX6314-07 |
Applications
| Portable Medical Instrumentation | Industrial PLC Controller Module |
|---|---|
|
Use Scenario: Battery-powered handheld glucose meter with real-time sensor sampling and LCD display. IC Role / Device Role / Timing Role: Supervises 3.3V main rail and asserts reset during battery sag or cold-start; enables deterministic boot after button-press manual reset. Use Value: 5µA supply current extends shelf life; 4.30V threshold matches Li-ion discharge profile; bidirectional RESET allows firmware-triggered self-test reset without hardware changes. |
Use Scenario: DIN-rail mounted programmable logic controller with isolated I/O and Ethernet connectivity. IC Role / Device Role / Timing Role: Monitors 5V system rail and provides synchronized reset to CPU, FPGA, and communication PHY upon undervoltage or watchdog timeout. Use Value: 20ms timeout ensures full power stabilization across distributed regulators; SOT143 footprint saves PCB area in space-constrained modules; MR pin simplifies front-panel reset button integration. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
|
Use Scenario: ANSI C12.20-compliant electricity meter with tamper detection and RF mesh networking. IC Role / Device Role / Timing Role: Provides brownout reset during AC line dropout or capacitor discharge; debounced MR supports utility technician field reset. Use Value: ±2.5% threshold accuracy over -40°C to +85°C ensures consistent behavior across outdoor temperature extremes; no external components reduce BOM count and field failure modes. |
Use Scenario: 12V automotive subsystem managing door locks, lighting, and CAN gateway functions. IC Role / Device Role / Timing Role: Supervises 3.3V MCU supply derived from buck converter; asserts reset during cranking-induced voltage dip (<6V) or ignition cycle transitions. Use Value: Immunity to 100ns VCC transients prevents false resets during alternator switching noise; 4.30V threshold aligns with automotive 3.3V LDO dropout margin; GND-referenced MR simplifies switch wiring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US43D2+T | Open-drain RESET output (no internal pullup); identical 4.30V threshold and 20ms timeout | Requires external 4.7kΩ pullup; not compatible with bidirectional µP reset arbitration | Select when interfacing with µPs having unidirectional reset inputs or when board-level pullup already exists |
| TPS3808G33DBVR | Fixed 3.3V threshold, 20ms timeout, 1.6µA IQ, SOT-23-6 package; no MR pin | Lacks manual reset input and bidirectional capability; optimized for ultra-low-IQ 3.3V systems only | Select only if 3.3V monitoring suffices and MR functionality is unnecessary; not drop-in compatible |
Compared with MAX6314US43D2+T, MAX6315US43D2+T removes the active pullup but retains identical monitoring specs - suitable for simpler unidirectional interfaces. TPS3808G33DBVR offers lower IQ and smaller package but sacrifices MR and bidirectional support, limiting use to fixed 3.3V rails without manual reset needs.
Availability
MAX6314US43D2+T is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial PLC controller modules, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and lead-free compliance.
Supply support for MAX6314US43D2+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 industrial, computing, communications, and consumer applications.
The MAX6314 series delivers highly accurate, low-power µP supervisory circuits targeting systems needing reliable power-on reset, brownout protection, and manual reset with minimal external components.
FAQ
What is the exact reset threshold voltage for MAX6314US43D2+T?
The MAX6314US43D2+T has a factory-trimmed nominal reset threshold of 4.30V, 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 specified in the Ordering Information table of the datasheet.
Does MAX6314US43D2+T support bidirectional reset communication with microcontrollers?
Yes, MAX6314US43D2+T supports bidirectional reset communication via its unique RESET output structure - combining an N-channel pulldown, 4.7kΩ passive pullup, and P-channel active pullup. This enables µPs like the 68HC11 to both drive RESET low and detect supervisor-initiated resets, allowing source-aware reset vector selection.
What is the reset timeout period for MAX6314US43D2+T, and is it adjustable?
The MAX6314US43D2+T has a fixed minimum reset timeout period of 20ms, determined by internal circuitry and not user-adjustable. This duration is guaranteed across temperature and supply voltage variations and ensures sufficient reset assertion time for safe µP initialization in demanding applications.
Can MAX6314US43D2+T operate from a 1.8V supply?
No, MAX6314US43D2+T requires a minimum VCC of 1.0V to maintain RESET output validity, but its 4.30V reset threshold means it is intended for monitoring higher-voltage rails (e.g., 3.3V or 5V systems). It cannot supervise a 1.8V rail - for that, a variant such as MAX6314US18D2+T would be required, though not offered in the D2 timeout family.
Is an external pullup resistor needed for the RESET pin of MAX6314US43D2+T?
No external pullup resistor is needed for the RESET pin of MAX6314US43D2+T. The device integrates a 4.7kΩ pullup resistor and a P-channel active pullup transistor, enabling direct connection to bidirectional µP reset pins without additional components - a key design advantage confirmed in the Typical Operating Circuit and Pin Description sections.
MAX6314US43D2+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.3V
- 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
MAX6314US43D2+T FAQ
1.How can I place an order for MAX6314US43D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US43D2+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 MAX6314US43D2+T reliable?
The price and inventory of MAX6314US43D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US43D2+T is usually 5 days.
3.What payment methods are accepted for MAX6314US43D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US43D2+T transactions.
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4.How is shipping managed for MAX6314US43D2+T?
MAX6314US43D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US43D2+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 MAX6314US43D2+T?
For technical support, including MAX6314US43D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US43D2+T requirements.
6.How does Aetrix verify that MAX6314US43D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6314US43D2+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 MAX6314US43D2+T meets industry standards.
7.What is the process for return or replacement of MAX6314US43D2+T?
All MAX6314US43D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US43D2+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 MAX6314US43D2+T part is unused and in its original packaging.
Return procedure for MAX6314US43D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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