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Analog Devices Inc./Maxim Integrated MAX6315US48D3+T
- Part No.:
- MAX6315US48D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US48D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
The MAX6315US48D3+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain reset signal when voltage falls below 4.63V or upon manual reset assertion. It guarantees reset assertion for ≥140ms after VCC recovery or MR release, draws only 5μA at 5.5V, and operates across –40°C to +125°C in a 4-pin SOT23 package-ideal for battery-powered microcontroller systems requiring reliable brownout protection.
For engineers reviewing the MAX6315US48D3+T datasheet, MAX6315US48D3+T pinout, MAX6315US48D3+T application, or MAX6315US48D3+T equivalent, key selection criteria include factory-trimmed 4.63V reset threshold, 140ms minimum timeout period, open-drain RESET output compatible with voltages up to 6V, guaranteed operation over industrial temperature range, and immunity to short VCC transients.
Technical Context
The MAX6315US48D3+T implements a precision voltage-monitoring comparator with factory-laser-trimmed resistive divider setting nominal VTH = 4.63V ±3.5% over –40°C to +125°C, and integrates a monolithic timer circuit that enforces a fixed 140ms (min) reset timeout after VCC rise or MR deassertion. Its internal 63kΩ MR pullup eliminates external components for manual reset functionality.
This device uses an open-drain n-channel MOSFET for RESET output, enabling level-shifting across supplies (e.g., monitoring +5V while pulling RESET to +3.3V), with VOL ≤0.4V at ISINK = 3.2mA and leakage <1μA when deasserted-ensuring clean interface with bidirectional μP reset pins without contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Nominal | 4.63V - Factory-trimmed threshold ensures accurate brownout detection for 5V-systems without external calibration. |
| tRP Min | 140ms - Guarantees sufficient reset hold time for full microcontroller initialization after power recovery. |
| ICC | 5μA at VCC = 5.5V - Enables multi-year operation in coin-cell–powered instrumentation and portable devices. |
| Operating Temp | –40°C to +125°C - Validated for under-hood automotive, industrial PLC, and high-reliability embedded applications. |
| RESET Output | Open-drain, 0V to 6V pullup - Allows interfacing with logic supplies independent of monitored VCC, eliminating level-shifters. |
| MR Input | Internal 63kΩ pullup - Supports direct connection of momentary switch to GND; no external resistor required. |
| VCC Range | 1.0V to 5.5V - Functions down to near-fully-depleted battery voltage, ensuring last-cycle reset integrity. |
Pinout & Package
Package: 4-pin SOT23 (U4+1), footprint-compatible with industry-standard 0.95mm pitch land pattern (Analog Devices outline 21-0052).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and timer; must be connected directly to system ground plane for noise immunity. |
| 2 (RESET) | Active-low open-drain output | Sinks current during reset; requires external pullup (e.g., 10kΩ) to logic supply; supports voltage translation up to 6V. |
| 3 (MR) | Manual reset input | Logic-low assertion forces reset; internal 63kΩ pullup allows NC or switch-to-GND use; 1μs minimum pulse width. |
| 4 (VCC) | Supply & monitor input | Power source and sensed rail; internal divider monitors this node; valid from 1.0V to 5.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.63V ±3.5% over full temperature range-eliminates need for external voltage reference or trimming. |
| Fixed 140ms timeout | Guaranteed minimum duration ensures compatibility with slow-starting μPs and flash memory initialization sequences. |
| Open-drain RESET | Enables reset signaling across mixed-supply systems (e.g., 5V VCC monitoring with 3.3V μP reset input) without level-shifter ICs. |
| Ultra-low ICC | 5μA typical supply current extends battery life in portable medical sensors and IoT edge nodes. |
| MR glitch rejection | 100ns immunity prevents spurious resets from ESD or PCB noise on manual reset lines. |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Long-term environmental monitoring using coin-cell power with periodic wake-up and sensor readout. IC Role / Device Role / Timing Role: Supervisory circuit asserting reset during brownout caused by battery voltage sag under load or low temperature. Use Value: 4.63V threshold and 140ms timeout prevent corrupted firmware execution during marginal supply conditions, while 5μA ICC enables >5-year operation on CR2032. | Use Scenario: DIN-rail mounted controller with isolated 24V DC input powering internal 5V/3.3V rails. IC Role / Device Role / Timing Role: Primary VCC supervisor for main µP domain, detecting undervoltage on 5V rail and asserting reset before logic faults occur. Use Value: –40°C to +125°C rating ensures reliability in uncooled enclosures; open-drain RESET interfaces cleanly with 3.3V FPGA reset inputs. |
| Automotive Body Control Units | Medical Infusion Pumps |
Use Scenario: Under-hood module monitoring 5V supply derived from vehicle battery (9V–16V) through LDO. IC Role / Device Role / Timing Role: Brownout detector triggering safe shutdown sequence when engine cranking causes 5V rail dip below 4.63V. Use Value: Immunity to 100ns glitches avoids false resets during alternator switching noise; 140ms timeout accommodates LDO recovery delay. | Use Scenario: Portable infusion pump with dual Li-ion cells (6V–8.4V) and buck-boost regulator supplying 5V MCU domain. IC Role / Device Role / Timing Role: Critical safety monitor ensuring MCU resets if battery voltage drops below safe operating margin during delivery phase. Use Value: Factory-trimmed 4.63V threshold provides consistent trip point across production units; 5μA ICC minimizes standby drain during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US48D3+T | Same 4.63V threshold and 140ms timeout, but features push-pull (not open-drain) RESET output. | Requires matched supply for RESET pullup; unsuitable for level-shifting between disparate logic domains. | Select MAX6314US48D3+T only when interfacing with μPs having dedicated reset input pins not shared with other peripherals. |
| TPS3808G33DBVR | 3.3V fixed threshold, 200ms timeout, 1.4μA ICC, SOT23-5 package with active-high RESET. | Not pin-compatible; requires PCB redesign; suited for lower-voltage systems where 3.3V monitoring suffices. | Choose TPS3808G33DBVR for ultra-low-power 3.3V applications where 4.63V threshold is unnecessary and higher accuracy (0.5% VTH tolerance) is required. |
Compared with MAX6314US48D3+T, the MAX6315US48D3+T's open-drain output enables flexible voltage-domain interfacing, while versus TPS3808G33DBVR, it offers higher reset threshold and proven robustness in 5V industrial environments-making it optimal for legacy 5V μP designs needing drop-in brownout protection.
Availability
MAX6315US48D3+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial control modules, automotive body electronics, and medical devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6315US48D3+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX6315 series belongs to Analog Devices' precision supervisory IC portfolio, engineered specifically for reliable power-on reset, brownout detection, and manual reset integration in space-constrained, low-power microprocessor systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US48D3+T?
The MAX6315US48D3+T has a factory-trimmed nominal reset threshold voltage of 4.63V, with tolerance of ±3.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during manufacturing and does not require external calibration or adjustment.
Does the MAX6315US48D3+T require an external pullup resistor on the RESET pin?
Yes, the MAX6315US48D3+T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor to any supply between 0V and 6V is recommended. The pullup voltage may differ from VCC, enabling level-shifting-this is a core design feature of the MAX6315US48D3+T.
What is the minimum reset timeout period specified for the MAX6315US48D3+T?
The MAX6315US48D3+T guarantees a minimum reset timeout period of 140ms after VCC rises above the 4.63V threshold or after the manual reset (MR) signal is deasserted. This value is tested and specified across –40°C to +125°C and ensures compatibility with slow-starting microcontrollers and peripheral initialization sequences.
Can the MAX6315US48D3+T operate with VCC below 2.5V?
Yes, the MAX6315US48D3+T operates with VCC as low as 1.0V, and its RESET output remains functional (guaranteed logic-low) down to VCC = 1V. However, the 4.63V reset threshold means it will assert reset continuously when VCC is below that level-making it effective for detecting end-of-life battery conditions in 5V systems.
Is the MR pin of the MAX6315US48D3+T internally pulled up?
Yes, the MR pin of the MAX6315US48D3+T includes an internal 63kΩ pullup resistor to VCC. This allows the pin to be left unconnected if manual reset is unused, or connected directly to a momentary switch tied to ground-no external components are needed for basic manual reset functionality in the MAX6315US48D3+T.
MAX6315US48D3+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:
- 4.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US48D3+T FAQ
1.How can I place an order for MAX6315US48D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US48D3+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 MAX6315US48D3+T reliable?
The price and inventory of MAX6315US48D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US48D3+T is usually 5 days.
3.What payment methods are accepted for MAX6315US48D3+T?
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4.How is shipping managed for MAX6315US48D3+T?
MAX6315US48D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US48D3+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 MAX6315US48D3+T?
For technical support, including MAX6315US48D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US48D3+T requirements.
6.How does Aetrix verify that MAX6315US48D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US48D3+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 MAX6315US48D3+T meets industry standards.
7.What is the process for return or replacement of MAX6315US48D3+T?
All MAX6315US48D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US48D3+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 MAX6315US48D3+T part is unused and in its original packaging.
Return procedure for MAX6315US48D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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