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Analog Devices Inc./Maxim Integrated MAX6314US28D4
- Part No.:
- MAX6314US28D4
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US28D4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,881
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Product details
Overview
MAX6314US28D4 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 2.80V reset threshold, 1120ms minimum reset timeout period, ±2.5% threshold accuracy over temperature, 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 MAX6314US28D4 datasheet, MAX6314US28D4 pinout, MAX6314US28D4 application, or MAX6314US28D4 equivalent, key selection criteria include reset threshold tolerance, timeout duration, bidirectional RESET interface capability, manual reset support, and immunity to short VCC transients in embedded µP systems.
Technical Context
The MAX6314US28D4 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set the 2.80V reset threshold, coupled with an internal timer that guarantees RESET remains asserted for ≥1120ms after VCC rises above threshold or MR deasserts. Its bidirectional RESET output integrates a 4.7kΩ pull-up resistor in parallel with a P-channel active pullup transistor and N-channel pulldown.
This architecture enables direct interfacing with µPs like the 68HC11 that sample RESET state post-reset to distinguish external vs. internal reset sources. The device includes a debounced manual reset input (MR) with 63kΩ internal pullup and rejects transients ≤100ns at 100mV overdrive, per typical operating characteristics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.80V nominal, ±2.5% over -40°C to +85°C - ensures reliable detection of VCC brownout below system operational minimum. |
| Reset Timeout Period | 1120ms minimum - guarantees sufficient hold time for full µP initialization and peripheral stabilization. |
| Supply Current | 5µA typical at +25°C - enables ultra-low-power operation in battery-backed or energy-constrained systems. |
| RESET Output Type | Bidirectional with integrated 4.7kΩ pullup + P-channel active pullup - eliminates external components and supports µP reset-source discrimination logic. |
| MR Input | Logic-low active with 63kΩ internal pullup - allows direct connection of momentary switch to GND without external debounce circuitry. |
| VCC Operating Range | 1.0V to 5.5V - supports wide-input monitoring across 1.8V, 3.3V, and 5V digital systems. |
| Reset Propagation Delay | 35µs max from VCC falling edge to RESET assertion - ensures timely response to supply collapse. |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint and 0.95mm height; lead-free and RoHS-compliant options available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail input; internally monitored to trigger reset when falling below 2.80V. |
| MR | Manual reset input | Active-low control: logic low asserts reset immediately and holds it for full 1120ms timeout after release. |
| RESET | Bidirectional reset output | Open-drain–compatible 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; required for accurate threshold sensing and output level referencing. |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 2.80V with ±2.5% accuracy over full temperature range - eliminates calibration and reduces BOM count. |
| Four selectable timeout periods | 1120ms minimum for MAX6314US28D4 - matches long-boot µP and FPGA configuration requirements. |
| Bidirectional RESET interface | Integrated 4.7kΩ pullup + P-channel active pullup - enables 68HC11-style reset-source identification without external components. |
| Immunity to short VCC transients | Rejects glitches ≤100ns at 100mV overdrive - prevents spurious resets in noisy power environments. |
| Debounced manual reset | MR pin with 63kΩ internal pullup - supports direct SPST switch-to-GND connection; no external RC needed. |
Applications
| Portable Medical Devices | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered glucose meters and handheld diagnostic tools requiring guaranteed reset during Li-ion battery discharge down to 2.8V. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when VCC falls below 2.80V, holding for 1120ms to ensure ADC and display controller initialization completes. Use Value: Prevents corrupted measurements or UI lockup by enforcing deterministic reset before firmware execution begins. |
Use Scenario: DIN-rail mounted programmable logic controllers exposed to 24VDC supply ripple and cold-start conditions. IC Role / Device Role / Timing Role: Primary power-on and brownout detector interfacing bidirectionally with Cortex-M7 µP to distinguish watchdog-triggered vs. supply-failure resets. Use Value: Enables differentiated fault logging and recovery paths based on reset source, improving system diagnostics and uptime. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: ANSI C12.22-compliant electricity meters with dual-supply (battery + line) and strict reset timing compliance. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail; asserts RESET for ≥1120ms after VCC recovery to satisfy metering IC power-up sequencing requirements. Use Value: Ensures EEPROM write integrity and RTC synchronization by guaranteeing stable supply before critical firmware initialization. |
Use Scenario: 12V automotive body modules (e.g., door control units) subject to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Supervises 5V/3.3V domain; uses MR pin for service-mode reset via diagnostic tool, with glitch rejection preventing false triggers during ignition noise. Use Value: Maintains functional safety compliance (ISO 26262 ASIL-B) by ensuring deterministic reset behavior under harsh electrical conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US28D4-T | Open-drain RESET output (no active pullup), identical 2.80V threshold and 1120ms timeout. | Requires external 4.7kΩ pullup; cannot support bidirectional reset-source discrimination logic used by 68HC11-class µPs. | Select only if target µP has unidirectional reset input and board layout already includes pullup resistor. |
| TPS3808G33DBVR | Fixed 3.3V threshold, 200ms timeout, push-pull RESET, 1.5µA quiescent current. | Lacks MR input and bidirectional RESET capability; optimized for low-power 3.3V systems without reset-source identification needs. | Choose for cost-sensitive 3.3V-only designs where 1120ms timeout is unnecessary and µP does not require bidirectional reset sampling. |
Compared with MAX6314US28D4, MAX6315US28D4-T requires external pullup and forfeits bidirectional reset functionality, while TPS3808G33DBVR offers lower current but lacks manual reset and precise 2.80V threshold - making MAX6314US28D4 uniquely suited for legacy 68HC11-based and battery-discharge-critical designs.
Availability
MAX6314US28D4 is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC controllers, and smart energy meters requiring stable component supply, long-lifecycle support, and guaranteed reset timing compliance.
Supply support for MAX6314US28D4 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, computing, and communications applications.
The MAX6314 series was designed specifically for µP reset supervision in systems requiring bidirectional reset I/O compatibility, factory-trimmed thresholds, and robust transient immunity - targeting legacy and low-power embedded platforms.
FAQ
What is the exact reset threshold voltage for MAX6314US28D4?
The MAX6314US28D4 has a factory-trimmed nominal reset threshold of 2.80V, with ±2.5% accuracy over the full operating temperature range (-40°C to +85°C). This value is laser-trimmed during production and specified in the Ordering Information table; it is not adjustable and applies exclusively to this variant.
Does MAX6314US28D4 support manual reset functionality?
Yes, MAX6314US28D4 includes a dedicated MR (manual reset) input pin with an internal 63kΩ pullup resistor. Asserting a logic-low signal on MR immediately forces RESET low and maintains it for the full 1120ms timeout period after MR returns high - enabling hardware-initiated reset without external components.
How does the bidirectional RESET output of MAX6314US28D4 differ from standard open-drain supervisors?
Unlike standard open-drain reset ICs, MAX6314US28D4's RESET pin integrates both a 4.7kΩ passive pullup resistor and a P-channel active pullup transistor. This dual-path design ensures fast rise time even with high bus capacitance - enabling µPs like the 68HC11 to reliably sample RESET state and distinguish external vs. internal reset sources.
What is the minimum reset timeout period for MAX6314US28D4?
The minimum reset timeout period for MAX6314US28D4 is 1120ms, as defined by the "D4" suffix in the part number. This value is guaranteed across temperature and supply voltage variations and is implemented via an internal one-shot timer - ensuring sufficient hold time for complex µP and peripheral initialization sequences.
Is MAX6314US28D4 compatible with 1.8V logic systems?
MAX6314US28D4 operates with VCC from 1.0V to 5.5V and asserts RESET down to VCC = 1.0V, but its 2.80V reset threshold means it is not intended for direct supervision of 1.8V rails. It is suitable for monitoring higher-voltage domains (e.g., 3.3V or 5V) in mixed-supply systems where 1.8V logic is powered separately and sequenced accordingly.
MAX6314US28D4 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:
- 2.8V
- 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-23-4
MAX6314US28D4 FAQ
1.How can I place an order for MAX6314US28D4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US28D4 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 MAX6314US28D4 reliable?
The price and inventory of MAX6314US28D4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US28D4 is usually 5 days.
3.What payment methods are accepted for MAX6314US28D4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US28D4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US28D4?
MAX6314US28D4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US28D4 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 MAX6314US28D4?
For technical support, including MAX6314US28D4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US28D4 requirements.
6.How does Aetrix verify that MAX6314US28D4 is sourced from the original manufacturer or authorized distributors?
All MAX6314US28D4 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 MAX6314US28D4 meets industry standards.
7.What is the process for return or replacement of MAX6314US28D4?
All MAX6314US28D4 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US28D4, 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 MAX6314US28D4 part is unused and in its original packaging.
Return procedure for MAX6314US28D4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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