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Analog Devices Inc./Maxim Integrated MAX6315US44D1+T
- Part No.:
- MAX6315US44D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US44D1+T.pdf
- Description:
- IC RESET CIRCUIT 4.39V SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
MAX6315US44D1+T from Analog Devices is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and asserts an open-drain active-low RESET signal when voltage falls below 4.39V or upon manual reset assertion. It provides factory-trimmed 1ms minimum reset timeout, operates from -40°C to +125°C, draws only 5μA typical supply current, and uses a 4-pin SOT23 package for space-constrained embedded power monitoring.
For engineers reviewing the MAX6315US44D1+T datasheet, MAX6315US44D1+T pinout, MAX6315US44D1+T application, or MAX6315US44D1+T equivalent, key selection criteria include its precise 4.39V reset threshold, guaranteed 1ms min timeout over temperature, open-drain output capable of level-shifting above VCC, immunity to sub-100ns MR glitches, and compatibility with μP reset pins requiring debounced manual initiation.
Technical Context
The MAX6315US44D1+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider setting nominal VTH = 4.39V ±3.5% over -40°C to +125°C. Its reset timeout is generated by an internal RC timer calibrated for 1ms minimum at full temperature range.
It features an internally pulled-up MR input (63kΩ) accepting logic-low manual reset pulses ≥1μs, with 500ns delay to RESET assertion. The open-drain RESET output sinks up to 3.2mA at VCC > 4.25V while maintaining VOL ≤ 0.4V, and supports pullup voltages up to +6.0V independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.39V ±3.5% over -40°C to +125°C - ensures reliable brownout detection for 4.5V nominal supplies |
| Reset Timeout Period | 1ms minimum (–40°C to +125°C) - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 5μA typical at VCC = 5.5V - enables ultra-low-power operation in battery-backed systems |
| MR Input Pullup | 63kΩ internal resistor - eliminates external components for manual reset; allows direct switch-to-GND connection |
| RESET Output Type | Open-drain n-channel MOSFET - supports level-shifting up to +6.0V, enabling reset assertion across mixed-supply domains |
| VCC Operating Range | 1.0V to 5.5V - functions down to near-dead-battery voltage, ensuring reset remains valid during deep discharge |
| MR Glitch Rejection | 100ns - suppresses noise-induced false resets in electrically noisy industrial environments |
Pinout & Package
MAX6315US44D1+T is housed in a RoHS-compliant 4-pin SOT23 package (package code U4+1), with 1.3mm × 2.9mm footprint and 0.95mm height. Pin 1 is GND, Pin 2 is RESET (open-drain), Pin 3 is MR (manual reset input), and Pin 4 is VCC (supply and threshold monitor).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and MR/RESET current; must be low-impedance for accurate threshold sensing |
| RESET (Pin 2) | Active-low open-drain output | Sinks current when asserted; requires external pullup; can interface with higher-voltage logic (≤6V) |
| MR (Pin 3) | Manual reset input | Logic-low active; internally pulled up to VCC; debounced internally; accepts ≥1μs pulses |
| VCC (Pin 4) | Supply voltage and monitor input | Power source and monitored rail; internal divider derives 4.39V threshold; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Precision factory-trimmed reset threshold | 4.39V with ±3.5% tolerance over full temperature range - eliminates calibration and reduces BOM count |
| Guaranteed 1ms minimum reset timeout | Valid across –40°C to +125°C - ensures consistent μP initialization timing without external timing components |
| Open-drain RESET with 6V absolute max rating | Enables level-shifted reset signaling between 1.8V, 3.3V, and 5V domains - simplifies multi-rail system design |
| Internal 63kΩ MR pullup | Removes need for external resistor; supports momentary switch directly to GND - reduces PCB area and assembly cost |
| 100ns MR glitch rejection | Prevents spurious resets from EMI or switching noise - improves reliability in motor drives and industrial controllers |
Applications
| Industrial PLC Controller | Battery-Powered Data Logger |
|---|---|
|
Use Scenario: Programmable logic controller operating in harsh factory environments with fluctuating 24VDC-derived 5V rails. IC Role / Device Role / Timing Role: Monitors 5V supply derived from industrial DC-DC converter; asserts RESET during brownouts caused by load transients or input dips. Use Value: Prevents firmware corruption during voltage sags by guaranteeing 1ms minimum reset pulse even at +125°C ambient. |
Use Scenario: Remote environmental sensor node powered by Li-SOCl₂ battery with long shelf life and infrequent wake cycles. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output; detects end-of-life battery voltage drop below 4.39V threshold before critical data loss. Use Value: Ultra-low 5μA quiescent current extends battery life; open-drain RESET allows direct interface with 3.3V μC reset pin while tolerating VCC decay to 1.0V. |
| Medical Infusion Pump | Automotive Body Control Module |
|
Use Scenario: Safety-critical infusion device requiring deterministic startup and fault recovery under varying input conditions. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation on power-up and manual reset via front-panel button; immune to ESD-induced MR glitches. Use Value: Internal 100ns MR filtering and 500ns MR-to-RESET delay ensure clean, predictable reset sequencing per IEC 62304 requirements. |
Use Scenario: Under-hood BCM exposed to wide thermal swings and conducted noise on 12V battery-derived 5V rail. IC Role / Device Role / Timing Role: Monitors 5V domain for brownout events during cranking; maintains RESET assertion until stable post-cranking voltage is confirmed. Use Value: ±3.5% VTH tolerance over –40°C to +125°C ensures robust trip point across automotive temperature extremes without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US44D2+T | Same 4.39V threshold but 20ms minimum reset timeout instead of 1ms | Designed for systems requiring longer reset hold time, e.g., complex FPGAs or boot-ROM initialization | Select when μP or FPGA datasheet specifies >10ms reset pulse duration |
| TLV803EB29DBZR | 2.93V fixed threshold, 140ms timeout, 1.8–6V VCC range, SOT23-3 package | Lacks manual reset (MR) pin; no internal MR pullup; smaller 3-pin footprint | Choose only if manual reset is unnecessary and 2.93V threshold matches system rail; not a functional substitute for MR capability |
Compared with MAX6315US44D2+T and TLV803EB29DBZR, the MAX6315US44D1+T uniquely delivers 4.39V precision monitoring with 1ms reset timing and integrated manual reset - making it optimal for fast-booting microcontrollers where short, deterministic reset pulses and field-serviceable reset buttons are required.
Availability
MAX6315US44D1+T is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical infusion pumps, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6315US44D1+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 since 1965.
The MAX6315 series belongs to Analog Devices' precision supervisory IC product line, engineered specifically for reliable power-on reset, brownout protection, and manual reset integration in space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6315US44D1+T?
The MAX6315US44D1+T has a factory-trimmed nominal reset threshold of 4.39V, with tolerance of ±3.5% over the full operating temperature range of –40°C to +125°C. This value is laser-trimmed during manufacturing and specified in the Electrical Characteristics table under "Reset Threshold (VTH)" with test conditions confirming validity across temperature and voltage conditions.
Does the MAX6315US44D1+T require an external pullup resistor on the RESET pin?
Yes, the MAX6315US44D1+T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor is recommended for most applications, connecting RESET to any supply between 0V and +6.0V. The pullup value must ensure logic-high recognition while supplying all connected leakage and input currents, as defined in the Electrical Characteristics table for VOL and sink current limits.
Can the MAX6315US44D1+T operate with VCC below 2.5V?
Yes, the MAX6315US44D1+T operates with VCC as low as 1.0V, per its specified operating voltage range. However, RESET assertion is guaranteed only for VCC > 1V, and VOL performance degrades below VCC = 2.5V (e.g., VOL ≤ 0.3V at ISINK = 1.2mA when VCC > 2.5V). Its functionality remains valid down to 1.0V, supporting deep brownout detection in low-voltage systems.
Is the MR pin of the MAX6315US44D1+T internally pulled up, and what is its resistance?
Yes, the MR pin of the MAX6315US44D1+T includes an internal pullup resistor of 63kΩ (typical, 32–100kΩ range), eliminating the need for an external component. This allows direct connection of a normally open momentary switch between MR and GND. The internal pullup ensures MR remains logic-high when idle, and the pin accepts logic-low pulses ≥1μs for reliable manual reset initiation.
How does the MAX6315US44D1+T handle short voltage transients on the VCC line?
The MAX6315US44D1+T is designed to reject short negative-going VCC transients, with documented immunity to pulses <100ns in duration. Its reset comparator includes built-in hysteresis and transient filtering, validated by the "Maximum Transient Duration vs. Reset Comparator Overdrive" curve in the datasheet. For enhanced immunity, a 0.1μF bypass capacitor placed close to the VCC pin is recommended.
MAX6315US44D1+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.39V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6315US44D1+T FAQ
1.How can I place an order for MAX6315US44D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US44D1+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 MAX6315US44D1+T reliable?
The price and inventory of MAX6315US44D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US44D1+T is usually 5 days.
3.What payment methods are accepted for MAX6315US44D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US44D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US44D1+T?
MAX6315US44D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US44D1+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 MAX6315US44D1+T?
For technical support, including MAX6315US44D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US44D1+T requirements.
6.How does Aetrix verify that MAX6315US44D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6315US44D1+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 MAX6315US44D1+T meets industry standards.
7.What is the process for return or replacement of MAX6315US44D1+T?
All MAX6315US44D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US44D1+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 MAX6315US44D1+T part is unused and in its original packaging.
Return procedure for MAX6315US44D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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