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Analog Devices Inc./Maxim Integrated MAX6314US28D3-T
- Part No.:
- MAX6314US28D3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US28D3-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,881
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Product details
Overview
MAX6314US28D3-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 2.80V reset threshold, 140ms 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 and brownout reset control.
For engineers reviewing the MAX6314US28D3-T datasheet, MAX6314US28D3-T pinout, MAX6314US28D3-T application, or MAX6314US28D3-T equivalent, key selection criteria include bidirectional RESET compatibility, precise 2.80V threshold tolerance, guaranteed 140ms reset hold time after VCC recovery, immunity to short VCC transients, and integration of 4.7kΩ pullup + active P-channel pullup for fast rise-time on shared reset buses.
Technical Context
The MAX6314US28D3-T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 2.80V nominal reset threshold, maintaining ±2.5% accuracy over –40°C to +85°C. Its reset generator uses an internally programmed monostable timer to enforce a minimum 140ms timeout after VCC rises above threshold or manual reset deassertion.
The RESET output combines an N-channel pulldown, a 4.7kΩ passive pullup, and a P-channel active pullup enabled for 2µs upon rising-edge detection - enabling sub-500ns transition to logic-high even under 390pF load, critical for multi-device 68HC11-style reset bus timing compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 2.80V - Factory-trimmed threshold for VCC brownout detection; triggers reset when supply falls below this level. |
| tRP Min | 140ms - Minimum duration RESET remains asserted after VCC recovers or MR deasserts; ensures stable µP initialization. |
| ICC | 5µA - Ultra-low quiescent current enables use in battery-critical applications without significant drain. |
| VTH Accuracy | ±1.8% at +25°C - Tight tolerance reduces need for system-level margining in precision power monitoring. |
| MR Input Threshold | 0.3 × VCC - Guaranteed logic-low recognition for manual reset assertion across full VCC range (1.0V–5.5V). |
| RESET Pullup R | 4.7kΩ - Integrated passive pullup eliminates external component; works in parallel with active P-channel device. |
| Temp Range | –40°C to +85°C - Industrial-grade operating range suitable for embedded controllers and portable instrumentation. |
Pinout & Package
SOT143 (4-pin, surface-mount) package with exposed pad option; 1.3mm × 2.1mm footprint, 0.95mm height, gull-wing leads. RoHS-compliant lead-free version available (replace "-T" with "+T").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply & Monitor Input | Main power rail input; internally monitored by precision voltage divider to detect undervoltage conditions. |
| MR | Manual Reset Input | Active-low input with 63kΩ internal pullup; asserts reset when pulled ≤0.3×VCC; debounced internally. |
| RESET | Bidirectional Reset I/O | Open-drain-compatible output with integrated 4.7kΩ pullup + P-channel active pullup; supports µP-initiated reset handshaking. |
| GND | Ground Reference | Return path for VCC, MR, and RESET circuits; must be low-impedance connection for accurate threshold sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET interface | Enables handshake-based reset source identification (e.g., external supervisor vs. µP self-reset) on shared reset lines per 68HC11 protocol. |
| Factory-trimmed 2.80V threshold | Eliminates external resistor network; guarantees ±1.8% accuracy at +25°C and ±2.5% over full temperature range. |
| 140ms minimum reset timeout | Ensures µP completes power stabilization and clock lock before release; prevents premature execution during marginal VCC recovery. |
| 5µA supply current | Reduces standby power in always-on battery systems; enables >10-year shelf life in coin-cell-powered devices. |
| Immunity to VCC transients | Rejects negative-going glitches ≤100ns at 100mV overdrive (e.g., 2.7V dip for 2.80V threshold), avoiding spurious resets. |
Applications
| Portable Medical Monitors | Industrial PLC Controllers |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter operating from single Li-ion cell with dynamic load-induced VCC sag. IC Role / Device Role: Voltage supervisor asserting bidirectional RESET to ARM Cortex-M0 host MCU during brownout events. Use Value: Prevents firmware corruption by holding reset until VCC stabilizes ≥2.80V for ≥140ms; 5µA ICC extends battery runtime between charges. |
Use Scenario: DIN-rail mounted controller subjected to 24VDC supply ripple and EMI-induced transients in factory automation. IC Role / Device Role: Primary reset supervisor interfacing with Renesas RX65N MCU via bidirectional reset line shared with watchdog IC. Use Value: Active P-channel pullup ensures RESET rises within two E-clock cycles (<500ns @ 4MHz) despite 300pF bus capacitance - enabling correct reset-source discrimination. |
| Handheld Test Instruments | Smart Energy Meters |
|
Use Scenario: Multifunction calibrator powered by rechargeable NiMH pack; requires reliable power-up sequencing and user-triggered reset. IC Role / Device Role: Supervisory circuit providing both VCC-monitored and MR-activated reset to TI MSP430F5xx MCU. Use Value: Internal 63kΩ MR pullup eliminates external resistor; 140ms tRP ensures ADC reference settles before firmware boot. |
Use Scenario: ANSI C12.22-compliant meter with isolated RS-485 interface and tamper-detection circuitry drawing burst current. IC Role / Device Role: Brownout detector for metrology SoC (e.g., Analog Devices ADE7953) with strict 2.8V VDD min requirement. Use Value: ±2.5% VTH accuracy over temperature avoids false resets during ambient swings; SOT143 footprint saves PCB area in sealed meter housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US28D3-T | Open-drain RESET output (no internal pullup or active pullup); identical 2.80V threshold and 140ms timeout. | Requires external 4.7kΩ pullup; unsuitable for bidirectional reset handshaking protocols like 68HC11. | Select when µP has dedicated pullup or only needs standard open-drain reset signaling. |
| TPS3808G33DBVR | Fixed 3.3V threshold (not 2.80V); push-pull RESET; 200ms default timeout (adjustable via capacitor); 1.6µA ICC. | Lacks bidirectional capability and MR debounce; optimized for lower-power fixed-threshold applications. | Select when system VCC is 3.3V and bidirectional reset identification is unnecessary. |
Compared with MAX6314US28D3-T, MAX6315US28D3-T removes bidirectional support but retains identical monitoring specs, while TPS3808G33DBVR trades threshold flexibility and reset bus compatibility for ultra-low current and adjustable timing - making MAX6314US28D3-T uniquely suited for 2.8V brownout detection with 68HC11-style reset arbitration.
Availability
MAX6314US28D3-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC controllers, handheld test instruments, smart energy meters, and battery-backed data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6314US28D3-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 high-performance analog, mixed-signal, and power-management ICs for industrial, computing, communications, and consumer applications.
The MAX6314 family delivers precision, low-power µP supervision with bidirectional reset capability - engineered specifically for systems where reset source identification and fast bus rise-time are essential, such as legacy 68HC11-based controllers and modern ultra-low-power embedded platforms.
FAQ
What is the exact reset threshold voltage for MAX6314US28D3-T?
The MAX6314US28D3-T has a factory-trimmed nominal reset threshold voltage of 2.80V, 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 verified per the Electrical Characteristics table in the official datasheet.
Does MAX6314US28D3-T support bidirectional reset communication with microcontrollers?
Yes, MAX6314US28D3-T supports bidirectional reset communication via its unique RESET output architecture - combining an N-channel pulldown, integrated 4.7kΩ pullup resistor, and P-channel active pullup. This enables compliant handshaking with µPs like the 68HC11 that distinguish external vs. self-initiated resets by sampling RESET state after a defined delay.
What is the minimum reset timeout period specified for MAX6314US28D3-T?
The minimum reset timeout period (tRP) for MAX6314US28D3-T is 140ms. This is the guaranteed minimum duration that the RESET output remains asserted after VCC rises above 2.80V or after the manual reset (MR) input is deasserted - ensuring robust µP initialization under varying supply conditions.
Can MAX6314US28D3-T operate with supply voltages below 2.80V?
Yes, MAX6314US28D3-T operates from VCC = 1.0V to 5.5V. While it asserts reset when VCC falls below 2.80V, it continues functional operation down to 1.0V - and RESET remains a valid logic-low output down to VCC = 1.0V (with 0.4V max VOL). Below 1.0V, RESET becomes high-impedance.
Is an external pullup resistor required for the RESET pin of MAX6314US28D3-T?
No, an external pullup resistor is not required for MAX6314US28D3-T. The device integrates a 4.7kΩ pullup resistor in parallel with a P-channel active pullup transistor on the RESET pin - fully supporting bidirectional reset bus timing without additional components.
MAX6314US28D3-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:
- 2.8V
- Output:
- Bidirectional
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6314US28D3-T FAQ
1.How can I place an order for MAX6314US28D3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US28D3-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 MAX6314US28D3-T reliable?
The price and inventory of MAX6314US28D3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US28D3-T is usually 5 days.
3.What payment methods are accepted for MAX6314US28D3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US28D3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US28D3-T?
MAX6314US28D3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US28D3-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 MAX6314US28D3-T?
For technical support, including MAX6314US28D3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US28D3-T requirements.
6.How does Aetrix verify that MAX6314US28D3-T is sourced from the original manufacturer or authorized distributors?
All MAX6314US28D3-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 MAX6314US28D3-T meets industry standards.
7.What is the process for return or replacement of MAX6314US28D3-T?
All MAX6314US28D3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US28D3-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 MAX6314US28D3-T part is unused and in its original packaging.
Return procedure for MAX6314US28D3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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