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Analog Devices Inc./Maxim Integrated MAX6314US25D1+T
- Part No.:
- MAX6314US25D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US25D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,563
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Product details
Overview
MAX6314US25D1+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 such as the 68HC11. It features a factory-trimmed 2.5V reset threshold, 1ms minimum reset timeout period, ±1.8% threshold accuracy at +25°C, and operates from 2.5V to 5.5V. It is used in portable/battery-powered equipment requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6314US25D1+T datasheet, MAX6314US25D1+T pinout, MAX6314US25D1+T application, or MAX6314US25D1+T equivalent, key selection criteria include its bidirectional RESET output architecture, SOT143 package compatibility, 5µA quiescent current, and immunity to short VCC transients - all critical for embedded µP systems with tight power and timing constraints.
Technical Context
The MAX6314US25D1+T integrates a precision voltage comparator with laser-trimmed resistors to monitor VCC against a fixed 2.5V threshold, with ±2.5% accuracy over –40°C to +85°C. Its internal timer enforces a guaranteed minimum 1ms reset timeout after VCC recovery or manual reset deassertion.
RESET output combines an n-channel pulldown, p-channel active pullup, and parallel 4.7kΩ resistor - enabling direct interface with bidirectional µP reset pins (e.g., 68HC11) without external components. MR input includes a 63kΩ internal pullup and supports debounced manual reset via a momentary switch to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.50V nominal, ±1.8% at +25°C - ensures precise power-fail detection for 2.5V logic 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-powered applications |
| VCC Operating Range | 2.5V to 5.5V - supports wide-input monitoring across 3.3V and 5V digital systems |
| MR Input Threshold | 0.3 × VCC max, 0.7 × VCC min - ensures robust noise-immune manual reset triggering |
| RESET Output Structure | Bidirectional with 4.7kΩ passive pullup + p-channel active pullup - eliminates need for external pullup and accelerates rise time under capacitive load |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive-adjacent embedded environments |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage and reset threshold monitor input | Primary power rail connection; internally divided to compare against 2.5V reference |
| MR | Manual reset input | Active-low input with 63kΩ internal pullup; asserts reset when pulled ≤0.3×VCC |
| RESET | Active-low bidirectional reset output | Combines n-channel sink, p-channel active pullup, and 4.7kΩ resistor - interfaces directly with 68HC11-style bidirectional reset I/O |
| GND | Ground reference | Return path for internal comparators, timer, and output drivers; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output | Enables native handshake with µPs like 68HC11 that distinguish internal vs. external reset sources via timing-based protocol |
| Factory-trimmed 2.5V threshold | Eliminates external resistor network and calibration - reduces BOM count and improves long-term stability |
| 1ms minimum reset timeout | Guarantees µP core and peripherals fully stabilize before release - prevents race conditions during power-up |
| 5µA supply current | Extends battery life in always-on monitoring applications - e.g., >10-year operation on CR2032 in low-duty-cycle systems |
| Immunity to short VCC transients | Rejects glitches <1µs duration below threshold - avoids spurious resets in noisy power environments |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG sensor powered by coin-cell battery, requiring reliable wake-from-reset and brownout recovery. IC Role / Device Role / Timing Role: Supervises 2.5V LDO output; asserts RESET during battery sag below 2.5V and holds for ≥1ms to ensure ADC and BLE SoC initialize correctly. Use Value: 5µA quiescent current extends operational life; bidirectional RESET allows host SoC to log reset cause (power fault vs. watchdog timeout) without added GPIO. |
Use Scenario: DIN-rail mounted I/O module with isolated 3.3V logic supply, exposed to 24V field wiring transients. IC Role / Device Role / Timing Role: Monitors 3.3V rail derived from switching regulator; detects dips caused by inductive load switching and initiates controlled controller restart. Use Value: ±2.5% threshold accuracy over temperature ensures consistent trip point across –40°C to +85°C ambient; SOT143 footprint fits dense isolation barrier layouts. |
| Smart Meter Data Loggers | Automotive Body Control Units |
|
Use Scenario: Battery-backed utility meter storing consumption data, where unexpected power loss must trigger safe flash write completion before shutdown. IC Role / Device Role / Timing Role: Triggers early RESET assertion at 2.5V to provide ≥1ms window for microcontroller to flush RAM cache to nonvolatile memory. Use Value: 1ms timeout is precisely matched to typical flash page-write latency; no external timing components required. |
Use Scenario: Low-voltage interior lighting controller powered from vehicle battery (9V–16V), subject to load-dump and cold-crank events. IC Role / Device Role / Timing Role: Supervises 2.5V reference rail for analog sensors; asserts RESET during cranking-induced dip below 2.5V and sustains it until stable. Use Value: Immunity to sub-µs transients prevents false resets during alternator commutation noise; MR pin enables service-mode forced reset via diagnostic tool. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US25D1+T | Open-drain RESET output (no internal pullup or active pullup); requires external 4.7kΩ pullup resistor | Compatible with µPs having unidirectional reset inputs only; not suitable for 68HC11-style bidirectional detection | Select when system uses standard open-drain reset topology and does not require bidirectional handshake capability |
| TPS3808G125DBVR | Fixed 2.5V threshold, 20ms timeout (not 1ms), 1.6µA IQ, SOT-23-5 package with independent watchdog input | Supports watchdog functionality and lower current draw, but lacks bidirectional RESET structure and MR glitch rejection specs | Select when extended timeout and ultra-low IQ are prioritized over bidirectional reset protocol support |
Compared with MAX6314US25D1+T, MAX6315US25D1+T removes active pullup complexity but forfeits 68HC11 compatibility, while TPS3808G125DBVR trades bidirectional timing intelligence for watchdog integration and lower power - making MAX6314US25D1+T uniquely suited for legacy µP designs requiring deterministic reset source identification.
Availability
MAX6314US25D1+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter data loggers, and automotive body control units requiring stable component supply with full lifecycle traceability and lead-free compliance.
Supply support for MAX6314US25D1+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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6314 series was designed specifically for µP reset supervision in resource-constrained embedded systems - emphasizing low power, small footprint, and native compatibility with bidirectional reset architectures like the 68HC11.
FAQ
What is the exact reset threshold voltage for MAX6314US25D1+T?
The MAX6314US25D1+T has a factory-trimmed nominal reset threshold of 2.50V, with ±1.8% accuracy at +25°C and ±2.5% over the full –40°C to +85°C operating range. This value is laser-trimmed during production and verified per the Electrical Characteristics table in the official datasheet. The threshold is referenced to VCC via an internal voltage divider, ensuring stable operation across its 2.5V–5.5V supply range. MAX6314US25D1+T maintains this specification without external calibration.
Does MAX6314US25D1+T support bidirectional reset communication with the 68HC11?
Yes, MAX6314US25D1+T is explicitly designed for bidirectional reset compatibility with the Motorola 68HC11 and similar µPs. Its RESET pin integrates an n-channel pulldown, p-channel active pullup, and parallel 4.7kΩ resistor - enabling the µP to drive RESET low and detect external assertion via timing-based protocol. The internal one-shot active pullup ensures RESET rises within two E-clock cycles even under 390pF load, satisfying the 68HC11's reset-source discrimination requirement. MAX6314US25D1+T implements this behavior without external components.
What is the minimum reset timeout period for MAX6314US25D1+T?
The MAX6314US25D1+T provides a guaranteed minimum reset timeout period of 1ms after VCC rises above the 2.5V threshold or after manual reset (MR) is deasserted. This interval is internally programmed and temperature-stable - varying less than ±3% over –40°C to +85°C per the Normalized Reset Timeout vs. Temperature plot. The 1ms duration ensures sufficient hold time for µP core and peripheral initialization, and is confirmed in the Ordering Information table for the "D1" suffix variant. MAX6314US25D1+T delivers this timing without external RC networks.
Can MAX6314US25D1+T operate down to 2.5V supply voltage?
Yes, MAX6314US25D1+T is fully specified to operate from VCC = 2.5V to 5.5V, with all electrical characteristics guaranteed across this range. At 2.5V, it maintains RESET output sinking capability (VOL ≤ 0.4V at ISINK = 0.5mA), valid MR input thresholds, and accurate 2.5V threshold monitoring. The device draws only 5µA typical current at 2.5V/+25°C, and its internal voltage reference remains stable due to laser-trimmed resistor matching. MAX6314US25D1+T is therefore suitable for direct monitoring of 2.5V logic rails without level-shifting.
Is a pullup resistor required on the RESET pin of MAX6314US25D1+T?
No external pullup resistor is required on the RESET pin of MAX6314US25D1+T. The device integrates a 4.7kΩ passive pullup resistor in parallel with a p-channel active pullup transistor - both automatically enabled when RESET is released and disabled when RESET is asserted. This dual-pullup architecture ensures fast rise time (<350ns into 100pF) and eliminates the need for discrete components. MAX6314US25D1+T's internal design satisfies the 68HC11's timing requirements without external parts, reducing BOM cost and board area.
MAX6314US25D1+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:
- 2.5V
- 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-143-4
MAX6314US25D1+T FAQ
1.How can I place an order for MAX6314US25D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US25D1+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 MAX6314US25D1+T reliable?
The price and inventory of MAX6314US25D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US25D1+T is usually 5 days.
3.What payment methods are accepted for MAX6314US25D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US25D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US25D1+T?
MAX6314US25D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US25D1+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 MAX6314US25D1+T?
For technical support, including MAX6314US25D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US25D1+T requirements.
6.How does Aetrix verify that MAX6314US25D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6314US25D1+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 MAX6314US25D1+T meets industry standards.
7.What is the process for return or replacement of MAX6314US25D1+T?
All MAX6314US25D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US25D1+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 MAX6314US25D1+T part is unused and in its original packaging.
Return procedure for MAX6314US25D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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