My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6315US49D3
- Part No.:
- MAX6315US49D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6315US49D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:2,324
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6315US49D3 from Maxim Integrated 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 4.90V or when manual reset (MR) is asserted. It features a factory-trimmed 4.90V reset threshold, 140ms minimum reset timeout period, 5µA supply current, and operates across –40°C to +125°C. It is used in portable battery-powered equipment for reliable power-on reset and brownout protection.
For engineers reviewing the MAX6315US49D3 datasheet, MAX6315US49D3 pinout, MAX6315US49D3 application, or MAX6315US49D3 equivalent, key selection considerations include its precise 4.90V threshold tolerance (±3.5%), SOT143 package compatibility, open-drain output capable of level-shifting above VCC, and guaranteed operation over extended temperature range.
Technical Context
The MAX6315US49D3 implements a precision voltage-monitoring comparator with laser-trimmed internal resistors to set the 4.90V nominal reset threshold, with ±3.5% accuracy over –40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 140ms (min) reset timeout after VCC rises above threshold or MR deasserts.
It uses an open-drain n-channel MOSFET for RESET output, enabling pull-up to any voltage ≤6V - including supplies higher than VCC - and includes a built-in 63kΩ pull-up on MR. Immunity to short VCC transients (<1µs at 1mV/µs slew) is achieved via internal glitch rejection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.90V ±3.5% (factory-laser-trimmed; ensures accurate brownout detection at 4.9V nominal) |
| Reset Timeout Period | 140ms minimum (guaranteed hold time for µP initialization after power recovery) |
| Supply Current | 5µA typical at +25°C (enables ultra-low-power operation in battery-critical systems) |
| Operating Temperature | –40°C to +125°C (supports automotive under-hood and industrial embedded deployment) |
| RESET Output Type | Open-drain, rated to 6V (allows level-shifting to higher-voltage logic domains or shared reset buses) |
| MR Input Logic | Active-low with 63kΩ internal pull-up (eliminates external components for manual reset functionality) |
| VCC Operating Range | 2.5V to 5.5V (covers 3.3V and 5V system rails while maintaining reset integrity) |
Pinout & Package
SOT143-4 package: 1.3mm × 2.9mm × 1.0mm body, surface-mount, lead-free compatible, tape-and-reel delivery only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance connection |
| 2 (RESET) | Active-low open-drain output | Sinks current when asserted; requires external pull-up resistor (e.g., 10kΩ) to defined logic-high voltage |
| 3 (MR) | Manual reset input | Logic-low assertion forces RESET active; internally pulled up to VCC (63kΩ), so floating = inactive |
| 4 (VCC) | Supply and monitor input | Powers device and provides monitored rail; internal divider compares against 4.90V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.90V threshold | Eliminates external resistor network and calibration; achieves ±3.5% accuracy over full temperature range |
| 140ms minimum reset timeout | Guarantees sufficient hold time for slow-starting µPs and peripheral initialization sequences |
| Open-drain RESET with >VCC capability | Enables single reset bus across mixed-supply systems (e.g., 3.3V MAX6315US49D3 monitoring 5V domain) |
| 5µA quiescent current | Extends battery life in portable instrumentation and handheld controllers without compromising supervision reliability |
| Immunity to <1µs VCC transients | Prevents false resets during switching noise or ESD-induced supply dips, verified per Typical Operating Characteristics |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG or glucose meter requiring reliable power-on and brownout reset during intermittent charging cycles. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until VCC stabilizes above 4.90V and holds for ≥140ms. Use Value: Prevents firmware execution errors during unstable battery voltage transitions; 5µA current draw extends operational runtime between charges. |
Use Scenario: DIN-rail mounted PLC module operating in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary VCC supervisor for ARM-based controller, ensuring deterministic reset behavior from –40°C to +125°C. Use Value: Factory-trimmed 4.90V threshold and 60ppm/°C tempco maintain reset accuracy across thermal stress; SOT143 footprint supports compact PCB layout. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: 12V-to-5V converted subsystem in BCM where load dump transients may cause temporary VCC sag. IC Role / Device Role / Timing Role: Brownout detector triggering RESET when 5V rail drops below 4.90V; debounced MR supports service-mode reinitialization. Use Value: Internal MR pull-up and transient immunity prevent spurious resets during electrical noise events; AEC-Q200 qualification supported by -40°C to +125°C rating. |
Use Scenario: Revenue-grade electricity meter with isolated MCU and real-time clock, requiring fail-safe boot sequence after power restoration. IC Role / Device Role / Timing Role: Power supervisor ensuring µC remains held in reset until 3.3V rail reaches 4.90V-equivalent stability (via regulator feedback monitoring). Use Value: 140ms timeout exceeds typical LDO stabilization time; open-drain output interfaces cleanly with opto-isolated reset chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6315US49D2-T | Same 4.90V threshold but 20ms minimum timeout (vs. 140ms) | Used where faster µP release is required post-power-up (e.g., high-speed DSP boot) | Select MAX6315US49D2-T only if system timing budget permits shorter reset assertion. |
| MAX6315US49D4-T | Same 4.90V threshold but 1120ms minimum timeout (vs. 140ms) | Deployed in systems with slow-ramping power supplies or legacy µPs needing extended reset hold | Choose MAX6315US49D4-T when 140ms is insufficient for full power rail stabilization or peripheral readiness. |
Compared with MAX6315US49D2-T and MAX6315US49D4-T, the MAX6315US49D3 offers a mid-range 140ms timeout optimized for modern low-power µCs and mixed-signal SoCs - balancing robust initialization margin against unnecessary boot delay.
Availability
MAX6315US49D3 is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX6315US49D3 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, automotive, communications, and computing applications.
The MAX6315 family delivers highly accurate, low-power µP reset supervision with factory-trimmed thresholds and multiple timeout options - engineered specifically for mission-critical power monitoring in space-constrained, thermally demanding systems.
FAQ
What is the exact reset threshold voltage for MAX6315US49D3?
The MAX6315US49D3 has a factory-trimmed nominal reset threshold of 4.90V, with guaranteed tolerance of ±3.5% over the full operating temperature range (–40°C to +125°C). This value is laser-trimmed during production and does not require external calibration. The MAX6315US49D3 datasheet specifies VTH = 4.90V ±3.5% in the Electrical Characteristics table under conditions TA = –40°C to +125°C.
Does MAX6315US49D3 support operation above 5V supply?
No - the MAX6315US49D3 operates from VCC = 2.5V to 5.5V, but its internal monitoring circuitry is calibrated for 4.90V threshold detection within that range. While the RESET output can be pulled up to voltages up to 6V, the VCC pin itself must not exceed 5.5V. Exceeding this violates Absolute Maximum Ratings and risks permanent damage to the MAX6315US49D3.
Can MAX6315US49D3 replace MAX811 in existing designs?
The MAX6315US49D3 is explicitly noted as pin-compatible with the MAX811 in its datasheet Features section. Both share identical SOT143-4 pinout (GND, RESET, MR, VCC) and open-drain RESET output. However, the MAX6315US49D3 offers tighter threshold accuracy (±3.5% vs. ±2.5% for some MAX811 variants) and different timeout options - verify timing requirements before drop-in replacement.
What is the minimum reset timeout period for MAX6315US49D3?
The MAX6315US49D3 guarantees a minimum reset timeout period of 140ms after VCC rises above the 4.90V threshold or after MR is deasserted. This value is specified in the Ordering Information table and confirmed in the Electrical Characteristics section under tRP (Reset Timeout Period) with "MIN tRP = 140ms" for part suffix D3.
Is MAX6315US49D3 available in lead-free packaging?
Yes - MAX6315US49D3 is available in lead-free packaging. Per the Ordering Information note, specify lead-free by replacing the "-T" suffix with "+T" (i.e., MAX6315US49D3+T). Standard "-T" parts are leaded; both versions use tape-and-reel packaging exclusively and meet RoHS compliance when ordered with "+T".
MAX6315US49D3 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:
- 4.9V
- 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-23-4
MAX6315US49D3 FAQ
1.How can I place an order for MAX6315US49D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6315US49D3 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 MAX6315US49D3 reliable?
The price and inventory of MAX6315US49D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6315US49D3 is usually 5 days.
3.What payment methods are accepted for MAX6315US49D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6315US49D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6315US49D3?
MAX6315US49D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6315US49D3 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 MAX6315US49D3?
For technical support, including MAX6315US49D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6315US49D3 requirements.
6.How does Aetrix verify that MAX6315US49D3 is sourced from the original manufacturer or authorized distributors?
All MAX6315US49D3 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 MAX6315US49D3 meets industry standards.
7.What is the process for return or replacement of MAX6315US49D3?
All MAX6315US49D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6315US49D3, 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 MAX6315US49D3 part is unused and in its original packaging.
Return procedure for MAX6315US49D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6315US49D3 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
