My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6394US310D1+T
- Part No.:
- MAX6394US310D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6394US310D1+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:4,333
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6394US310D1+T from Maxim Integrated is a low-power CMOS microprocessor supervisory circuit that monitors VCC supply voltage and provides a debounced manual reset input. It asserts an active-low open-drain RESET signal when VCC falls below 3.102V (±1% over −40°C to +125°C) or MR is pulled low, with a guaranteed 0.7ms minimum reset timeout period and 5µA supply current at +25°C. It is used in battery-powered controllers and critical μP power monitoring systems.
For engineers reviewing the MAX6394US310D1+T datasheet, MAX6394US310D1+T pinout, MAX6394US310D1+T application, or MAX6394US310D1+T equivalent, key selection criteria include factory-trimmed 3.102V reset threshold, SOT143-4 package compatibility, 0.7ms timeout option, ±1.0% accuracy across automotive temperature range, and open-drain RESET output capable of level-shifting above VCC.
Technical Context
The MAX6394US310D1+T implements a precision voltage-monitoring comparator with laser-trimmed internal resistive divider to set its nominal 3.102V reset threshold, achieving ±1.0% accuracy from −40°C to +125°C and 60ppm/°C tempco. Its internal timer generates a fixed 0.7ms (min) reset timeout after VCC recovery or MR deassertion.
It features an integrated 63kΩ pullup on MR, supports glitch rejection of 100ns transients, and delivers RESET output sinking capability up to 3.2mA at VCC > 4.25V while maintaining VOL ≤ 0.4V. The open-drain structure allows RESET to be pulled up to any voltage between 0V and +6V - independent of VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.102V ±1.0% (−40°C to +125°C); ensures reliable brownout detection for 3.3V systems |
| Reset Timeout Period | 0.7ms minimum; guarantees sufficient processor initialization time after power recovery |
| Supply Current | 5µA typical at +25°C; enables ultra-low-power operation in portable/battery equipment |
| Operating Temp Range | −40°C to +125°C; qualified for under-hood automotive and industrial embedded use |
| RESET Output Type | Open-drain n-channel MOSFET; supports level-shifting and wired-OR reset bus configurations |
| MR Input Logic | Active-low with 63kΩ internal pullup; eliminates external components for manual reset switch interface |
| VCC Range | 1.0V to 5.5V; operates during deep brownout down to 1V while still asserting RESET |
Pinout & Package
SOT143-4 (4-pin plastic surface-mount package, 1.3mm × 2.9mm footprint, 1.0mm height), JEDEC MO-178 compatible, RoHS-compliant, tape-and-reel packaging (2.5k per reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for internal circuitry and RESET sink current; must connect to system ground plane |
| RESET (Pin 2) | Active-low open-drain output | Sinks current to assert reset; requires external pullup (e.g., 10kΩ) to logic supply (≤6V) |
| MR (Pin 3) | Manual reset input | Logic-low assertion triggers reset; internally pulled up to VCC (63kΩ), so open-circuit = inactive |
| VCC (Pin 4) | Supply and monitor input | Powers device and feeds internal voltage divider; monitored for threshold violation; accepts 1.0–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 3.102V with ±1.0% tolerance over full temperature range - eliminates calibration and external resistor networks |
| Four selectable timeout options | 0.7ms minimum timeout (D1 variant) - optimized for fast-boot microcontrollers without compromising noise immunity |
| Open-drain RESET with >VCC capability | Allows RESET line to interface with higher-voltage logic domains (up to +6V), enabling flexible system-level reset architecture |
| Immunity to short VCC transients | Rejects glitches as short as 100ns - prevents spurious resets during switching noise or ESD events |
| AEC-Q100 qualification | Validated for automotive applications requiring reliability across −40°C to +125°C operating range |
Applications
| Battery-Powered Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: A handheld industrial controller powered by two AA cells (1.8–3.2V range) requires reliable reset during battery depletion and cold-start conditions. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET when VCC drops below 3.102V, with 0.7ms timeout ensuring clean μC boot before firmware execution. Use Value: Prevents erratic behavior during brownout by guaranteeing reset assertion down to 1.0V VCC and eliminating need for external RC timing components. | Use Scenario: Under-hood electronic control unit exposed to −40°C to +125°C ambient, monitoring 3.3V domain for engine management subsystems. IC Role / Device Role / Timing Role: High-accuracy reset generator with ±1.0% threshold stability and AEC-Q100 qualification, providing deterministic reset timing across full automotive temperature range. Use Value: Ensures functional safety compliance by maintaining reset integrity despite thermal drift, eliminating field failures due to marginal threshold shift. |
| Portable Medical Instruments | Industrial PLC I/O Modules |
Use Scenario: Battery-backed patient monitor with sleep/wake cycles must avoid false resets during brief voltage sags caused by sensor activation bursts. IC Role / Device Role / Timing Role: Supervisory IC rejecting <100ns transients while asserting RESET only on sustained undervoltage - leveraging internal glitch filter and precise 3.102V threshold. Use Value: Improves system uptime and diagnostic confidence by distinguishing real brownouts from transient noise, reducing unnecessary reboots. | Use Scenario: DIN-rail mounted programmable logic controller module with isolated 3.3V logic supply and non-isolated 24V field-side power. IC Role / Device Role / Timing Role: Level-shifting reset supervisor using open-drain RESET pulled to 24V, coordinating reset across multiple voltage domains during main supply faults. Use Value: Enables single-point reset initiation across mixed-supply subsystems without additional level translators or isolation barriers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB31DBZR | 3.1V threshold (±2%), 200ms timeout default, SOT-23-3 package, no MR input | Lacks manual reset and offers longer timeout; suited for simpler, cost-sensitive designs without user-initiated reset | Select if MR functionality is unnecessary and board space is constrained (3-pin vs. 4-pin) |
| TPS3808G33DBVR | 3.3V threshold (±0.5%), adjustable timeout via capacitor, SOT-23-6 package, includes watchdog timer | Offers watchdog capability and tighter threshold accuracy but requires external timing capacitor and larger footprint | Choose when system-level watchdog supervision is required alongside reset, and layout allows extra pin and capacitor |
Compared with TLV803EB31DBZR and TPS3808G33DBVR, the MAX6394US310D1+T uniquely combines factory-set 3.102V threshold, 0.7ms minimum timeout, integrated MR pullup, and true >VCC open-drain RESET in a compact SOT143-4 - making it optimal for space-constrained, low-power, and multi-rail reset coordination applications.
Availability
MAX6394US310D1+T is available at Aetrix Electronics and suitable for battery-powered controllers, automotive body control modules, and portable medical instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6394US310D1+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) designs high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, communications, and computing markets.
The MAX6394 family delivers precision, low-power microprocessor supervisory circuits with factory-trimmed thresholds and fixed timeout options - engineered specifically for robust power monitoring in harsh environments and space-constrained portable systems.
FAQ
What is the exact reset threshold voltage of the MAX6394US310D1+T?
The MAX6394US310D1+T has a factory-trimmed nominal reset threshold of 3.102V, with guaranteed tolerance of ±1.0% over the full −40°C to +125°C operating temperature range. This value is confirmed in Table 2 of the official datasheet and applies specifically to the "310" suffix variant of the MAX6394US series.
Does the MAX6394US310D1+T require external components to operate?
No, the MAX6394US310D1+T requires no external components for basic operation. Its reset threshold and timeout period are factory-programmed, MR includes a 63kΩ internal pullup, and RESET is open-drain - needing only an external pullup resistor (e.g., 10kΩ) to function. No capacitors or trimming resistors are needed.
Can the RESET output of the MAX6394US310D1+T be pulled up to a voltage higher than VCC?
Yes, the MAX6394US310D1+T RESET output is an open-drain n-channel MOSFET rated for up to +6.0V, allowing it to be pulled up to any voltage between 0V and +6V - including supplies higher than VCC. This enables level-shifting across different logic domains without additional interface circuitry.
What is the minimum VCC voltage at which the MAX6394US310D1+T continues to assert RESET?
The MAX6394US310D1+T guarantees RESET remains asserted for VCC > 1.0V. Below 1.0V, its ability to sink current degrades, but the device continues asserting RESET until VCC drops sufficiently to disable internal circuitry - supporting reliable reset hold-down during deep brownout conditions.
Is the MAX6394US310D1+T qualified for automotive applications?
Yes, the MAX6394US310D1+T is AEC-Q100 qualified for Grade 1 (−40°C to +125°C), as stated in the Benefits and Features section of the datasheet. This qualification confirms its suitability for automotive body electronics, infotainment, and other under-hood or cabin applications requiring high reliability.
MAX6394US310D1+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:
- 3.102V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 700µs Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6394US310D1+T FAQ
1.How can I place an order for MAX6394US310D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6394US310D1+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 MAX6394US310D1+T reliable?
The price and inventory of MAX6394US310D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6394US310D1+T is usually 5 days.
3.What payment methods are accepted for MAX6394US310D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6394US310D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6394US310D1+T?
MAX6394US310D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6394US310D1+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 MAX6394US310D1+T?
For technical support, including MAX6394US310D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6394US310D1+T requirements.
6.How does Aetrix verify that MAX6394US310D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6394US310D1+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 MAX6394US310D1+T meets industry standards.
7.What is the process for return or replacement of MAX6394US310D1+T?
All MAX6394US310D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6394US310D1+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 MAX6394US310D1+T part is unused and in its original packaging.
Return procedure for MAX6394US310D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6394US310D1+T 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…
