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Analog Devices Inc./Maxim Integrated MAX6314US48D3
- Part No.:
- MAX6314US48D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6314US48D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,496
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Product details
Overview
MAX6314US48D3 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 4.80V 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 reset and brownout protection.
For engineers reviewing the MAX6314US48D3 datasheet, MAX6314US48D3 pinout, MAX6314US48D3 application, or MAX6314US48D3 equivalent, key selection criteria include bidirectional RESET compatibility, precise 4.80V threshold tolerance, 140ms timeout timing, immunity to short VCC transients, and absence of external pull-up components.
Technical Context
The MAX6314US48D3 implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its 4.80V nominal reset threshold. Its RESET output combines an n-channel pulldown with a p-channel active pullup transistor paralleled by a 4.7kΩ resistor-enabling direct interface to bidirectional µP reset pins without external components.
Reset assertion occurs when VCC falls below 4.80V (±1.8% at +25°C) or MR is pulled low; reset remains active for ≥140ms after VCC rises above threshold or MR deasserts. The device includes internal 63kΩ MR pullup, glitch rejection (100ns), and operates across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Reset Threshold | 4.80V - precisely factory-set for systems powered from 5V rails with 200mV noise margin |
| Reset Timeout Period | ≥140ms - ensures µP initialization completes before release, compatible with slow-start power supplies |
| Supply Current | 5µA at +25°C - enables multi-year battery life in portable instrumentation |
| Threshold Accuracy | ±1.8% at +25°C - eliminates need for external calibration or trimming |
| MR Input Threshold | 0.3 × VCC (low) / 0.7 × VCC (high) - robust TTL/CMOS logic compatibility with noise margin |
| RESET Output Structure | Bidirectional with 4.7kΩ passive + p-channel active pullup - supports 68HC11-style reset source arbitration |
| Operating Temperature | -40°C to +85°C - qualified for industrial and automotive-adjacent embedded control environments |
Pinout & Package
SOT143 (4-pin, surface-mount) package with 1.3mm × 2.9mm footprint and 0.95mm height; lead-free and RoHS-compliant; rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply voltage input and reset threshold monitor | Monitors system VCC directly; internal laser-trimmed divider sets 4.80V trip point |
| MR | Manual reset input | Active-low; internally pulled up to VCC via 63kΩ; debounced without external components |
| RESET | Bidirectional reset output | Combines n-channel sink + p-channel active pullup + 4.7kΩ resistor; interfaces directly to 68HC11 reset I/O |
| GND | Ground reference | Return path for all internal circuitry and reset output current |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional RESET output | Enables µP-level reset source arbitration (e.g., 68HC11) without external pull-up or level-shifting |
| Factory-trimmed 4.80V threshold | Eliminates external resistor network; supports 5V systems with tight 200mV hysteresis margin |
| 140ms minimum reset timeout | Guarantees full µP core and peripheral initialization before release under worst-case VCC ramp rates |
| 5µA quiescent current | Extends battery runtime in handheld test equipment and remote sensors beyond 10 years |
| Immunity to 100ns VCC transients | Rejects ESD-induced supply glitches without false resets, reducing firmware recovery overhead |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG and pulse oximeter units operating from single Li-ion cells with dynamic load switching. IC Role / Device Role / Timing Role: Supervises 3.3V/5V rail integrity and asserts reset during brownout or manual recalibration. Use Value: 5µA ICC extends battery life; 4.80V threshold prevents premature reset during transient load dips near 4.9V. |
Use Scenario: DIN-rail mounted digital input modules exposed to 24VDC field wiring with inductive kickback. IC Role / Device Role / Timing Role: Monitors isolated 5V logic supply and provides 140ms reset hold-off after power restoration. Use Value: Bidirectional RESET allows PLC CPU to distinguish between supervisor-initiated and watchdog-initiated resets for diagnostics. |
| Automotive Diagnostic Tools | Smart Energy Meters |
Use Scenario: Handheld OBD-II scanners powered from vehicle 12V system via LDO, subject to cranking dips. IC Role / Device Role / Timing Role: Detects VCC drop below 4.80V during engine start and holds µP in reset until stable. Use Value: ±1.8% threshold accuracy ensures consistent trip point across temperature, avoiding spurious resets at cold start. |
Use Scenario: Revenue-grade meters with tamper detection, requiring secure boot and supply monitoring. IC Role / Device Role / Timing Role: Guarantees clean reset on AC/DC converter startup and validates VCC prior to metrology firmware execution. Use Value: Internal 63kΩ MR pullup enables pushbutton reset without external BOM parts, reducing PCB area and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US48D3-T | Open-drain RESET output (no active pullup); identical 4.80V threshold and 140ms timeout | Requires external 4.7kΩ pullup; incompatible with bidirectional reset arbitration | Select only if target µP uses open-drain reset (e.g., many ARM Cortex-M) and no source arbitration needed |
| TPS3808G33DBVR | Fixed 3.3V threshold; adjustable timeout (200ms default); higher 12µA ICC; SOT-23-5 package | Not pin-compatible; lacks bidirectional RESET structure; requires external pullup for µP interface | Use where 3.3V rail supervision suffices and board space permits SOT-23-5; avoid for 68HC11 or similar bidirectional designs |
Compared with MAX6314US48D3, MAX6315US48D3-T omits the p-channel pullup and requires external biasing, while TPS3808G33DBVR targets lower-voltage systems and lacks native bidirectional support-making MAX6314US48D3 uniquely suited for legacy µP reset arbitration in 5V domains.
Availability
MAX6314US48D3 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, and automotive diagnostic tools requiring stable component supply, long-term lifecycle support, and guaranteed performance across -40°C to +85°C.
Supply support for MAX6314US48D3 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, communications, and computing applications.
The MAX6314 family delivers highly accurate, low-power µP supervisory circuits optimized for systems requiring bidirectional reset signaling, factory-trimmed thresholds, and minimal external components-targeting portable, industrial, and automotive-qualified embedded control.
FAQ
What is the exact reset threshold voltage of the MAX6314US48D3?
The MAX6314US48D3 has a factory-trimmed nominal reset threshold of 4.80V, with ±1.8% accuracy at +25°C and ±2.5% over the full -40°C to +85°C temperature range. This value is laser-trimmed during production and specified in the Ordering Information table; it applies exclusively to the MAX6314US48D3 variant, not the broader MAX6314 family.
Does the MAX6314US48D3 require an external pull-up resistor on the RESET pin?
No, the MAX6314US48D3 does not require an external pull-up resistor. Its RESET output integrates a 4.7kΩ passive pull-up resistor in parallel with a p-channel active pullup transistor, enabling direct connection to bidirectional µP reset pins like those on the 68HC11. This eliminates external components while ensuring fast rise time under capacitive bus loading.
How does the manual reset (MR) function work on the MAX6314US48D3?
The MR pin on the MAX6314US48D3 is an active-low input with an internal 63kΩ pull-up resistor to VCC. Pulling MR low asserts RESET immediately; RESET remains asserted for the full 140ms timeout period after MR returns high. No external debounce circuitry is needed, though a 0.1µF capacitor to GND is recommended in noisy environments.
Is the MAX6314US48D3 pin-compatible with other MAX6314 variants?
Yes, all MAX6314 variants-including MAX6314US48D3-share identical SOT143 pinout (VCC, MR, RESET, GND) and electrical interface. Differences are limited to factory-set reset threshold (4.80V) and timeout period (140ms minimum); no PCB layout change is required when substituting within the same D3 timeout group.
What is the supply current consumption of the MAX6314US48D3 at room temperature?
The MAX6314US48D3 draws 5µA typical supply current (ICC) at +25°C and VCC = 5.5V with no load. This ultra-low quiescent current is confirmed in the Electrical Characteristics table and enables multi-year operation in battery-powered applications such as handheld test instruments and portable medical devices.
MAX6314US48D3 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:
- 4.8V
- 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-23-4
MAX6314US48D3 FAQ
1.How can I place an order for MAX6314US48D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6314US48D3 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 MAX6314US48D3 reliable?
The price and inventory of MAX6314US48D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6314US48D3 is usually 5 days.
3.What payment methods are accepted for MAX6314US48D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6314US48D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6314US48D3?
MAX6314US48D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6314US48D3 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 MAX6314US48D3?
For technical support, including MAX6314US48D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6314US48D3 requirements.
6.How does Aetrix verify that MAX6314US48D3 is sourced from the original manufacturer or authorized distributors?
All MAX6314US48D3 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 MAX6314US48D3 meets industry standards.
7.What is the process for return or replacement of MAX6314US48D3?
All MAX6314US48D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6314US48D3, 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 MAX6314US48D3 part is unused and in its original packaging.
Return procedure for MAX6314US48D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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