My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6348UR46
- Part No.:
- MAX6348UR46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6348UR46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,725
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6348UR46 from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 4.63V power supplies and assert reset during brownout or power-up/down events. It delivers 1µA max supply current, 100ms minimum reset timeout, factory-trimmed ±1.5% threshold accuracy at +25°C, and operates across -40°C to +85°C. Used in portable battery-powered systems requiring reliable, low-power reset assertion.
For engineers reviewing the MAX6348UR46 datasheet, MAX6348UR46 pinout, MAX6348UR46 application, or MAX6348UR46 equivalent, this page provides verified functional identity, confirmed SOT23-3 package mapping, validated open-drain reset behavior, temperature-stable hysteresis (9.5mV), and direct alternatives with documented output topology and threshold differences.
Technical Context
The MAX6348UR46 implements a precision voltage comparator with internal reference and hysteresis to detect VCC drops below its 4.63V reset threshold. Its open-drain RESET output requires an external pull-up resistor and supports bidirectional µP reset interfaces like the Motorola 68HC11.
It features transient immunity up to 200µs for 100mV overdrive, guaranteed correct state down to 1V VCC, and no external components required. All electrical specs-including 0.4V VOL at 100µA sink-are fully characterized from -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±1.5% at +25°C; ensures reliable detection of 4.63V supply collapse before system malfunction |
| Supply Current | 1µA max; enables multi-year operation in coin-cell–powered devices without compromising reset reliability |
| Reset Timeout | 100ms minimum after VCC rise; guarantees sufficient hold time for full µP initialization sequence |
| Output Type | Open-drain active-low; allows wired-OR configuration and compatibility with bidirectional µP reset pins |
| Operating Temp | -40°C to +85°C; qualified for industrial and automotive under-hood environments |
| Hysteresis | 9.5mV; prevents oscillation during slow VCC recovery near threshold |
| VCC Range | 1.0V to 5.5V; remains functional and correctly latched even during deep brownout conditions |
Pinout & Package
MAX6348UR46 is housed in a 3-pin SOT23-3 package (JEDEC MO-178AA), footprint-compatible with SC70-3 but with larger pad spacing and thermal mass. The package supports tape-and-reel delivery and both leaded and lead-free assembly (suffix "+T" for RoHS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Open-drain active-low output; sinks current when asserted; requires external pull-up to VCC or another rail |
| 3 | VCC | Power supply input; monitored voltage source; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max enables >10-year shelf life in battery-backed instrumentation |
| Factory-trimmed VTH | 4.63V with ±1.5% room-temp tolerance eliminates manual calibration or external resistors |
| Transient immunity | Rejects VCC glitches ≤200µs at 100mV overdrive-critical for noisy automotive or industrial rails |
| No external components | Single-chip solution reduces BOM count, PCB area, and qualification effort vs. discrete reset circuits |
| Wide VCC range | Operates down to 1.0V VCC-ensures valid reset state even during severe brownout or cold-start conditions |
Applications
| Portable Medical Sensors | Automotive Body Control Modules |
|---|---|
Use Scenario: Wearable ECG patch powered by CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 3.3V LDO output and asserts open-drain reset to ARM Cortex-M0+ MCU during battery sag below 4.63V. Use Value: 1µA quiescent current extends battery life beyond 24 months; open-drain output interfaces directly with MCU's bidirectional reset pin without level-shifting. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting in 12V vehicle architecture. IC Role / Device Role / Timing Role: Monitors 5V system rail derived from buck converter; holds MCU in reset during cranking-induced dips below 4.63V. Use Value: Guaranteed operation down to 1V VCC ensures reset remains asserted through deep cranking transients; 100ms timeout satisfies ISO 16750-2 cold-cranking timing requirements. |
| Industrial PLC I/O Submodules | Smart Energy Meters |
Use Scenario: DIN-rail mounted analog input card with isolated ADC and RS-485 interface. IC Role / Device Role / Timing Role: Resets FPGA-based controller on 3.3V auxiliary rail during AC power interruption or surge-induced brownout. Use Value: 9.5mV hysteresis prevents chatter during slow VCC recovery; SOT23-3 footprint fits high-density layout constraints. |
Use Scenario: Revenue-grade meter with real-time clock, metrology ASIC, and NB-IoT modem operating from 3.6V Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Provides fail-safe reset to metrology processor when main 4.63V regulated rail collapses due to battery end-of-life. Use Value: Factory-trimmed 4.63V threshold matches exact battery cutoff voltage; 1µA ICC avoids measurable drain on primary energy source. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328UR46 | Same SOT23-3 package, identical 4.63V threshold and open-drain output, but rated only to +70°C ambient | Limited to commercial-temperature applications; not qualified for extended industrial or automotive use | Select MAX6328UR46 only if operating environment stays ≤+70°C and cost sensitivity outweighs temperature margin |
| TPS3808G33DBVR | Push-pull active-low output, 3.3V fixed threshold, 1.6µA ICC, same SOT23-3 footprint | Requires redesign of pull-up network; unsuitable where bidirectional reset or 4.63V monitoring is mandatory | Choose TPS3808G33DBVR only when 3.3V supervision suffices and board-level pull-up can be removed |
Compared with MAX6348UR46, MAX6328UR46 sacrifices temperature range for lower unit cost, while TPS3808G33DBVR changes output topology and threshold-neither offers drop-in replacement capability without schematic or firmware validation.
Availability
MAX6348UR46 is available at Aetrix Electronics and suitable for portable medical sensors, automotive body control modules, industrial PLC I/O submodules, and smart energy meters requiring stable component supply across extended temperature ranges and ultra-low power budgets.
Supply support for MAX6348UR46 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 markets.
The MAX63xx family delivers ultra-low-power, factory-trimmed supervisory circuits targeting battery-operated and thermally constrained systems where reset reliability cannot be compromised by supply noise or temperature drift.
FAQ
What is the exact reset threshold voltage of MAX6348UR46 and how tightly is it specified?
The MAX6348UR46 has a factory-trimmed reset threshold of 4.63V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. This specification is guaranteed-not typical-and applies directly to the MAX6348UR46 device, ensuring predictable brownout response without external calibration.
Does MAX6348UR46 require an external pull-up resistor on its RESET pin?
Yes, MAX6348UR46 features an open-drain RESET output and requires an external pull-up resistor to VCC or another logic rail. Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. This design enables wired-OR reset networks and compatibility with bidirectional µP reset pins, as confirmed in the MAX6348UR46 datasheet Figure 1.
Can MAX6348UR46 operate reliably during severe power supply transients?
Yes, MAX6348UR46 is designed to ignore fast negative-going VCC transients: it suppresses reset assertion for glitches ≤200µs duration when VCC sags 100mV below threshold. This transient immunity is measured and specified in the MAX6348UR46 Electrical Characteristics table and validated across temperature, making it suitable for automotive and industrial environments.
What is the minimum VCC voltage at which MAX6348UR46 guarantees correct reset state?
MAX6348UR46 guarantees correct reset assertion and latching behavior down to VCC = 1.0V, as stated in the Absolute Maximum Ratings and Functional Operation sections of the MAX6348UR46 datasheet. This ensures fail-safe operation during deep brownout or cold-start conditions where other supervisors may release reset prematurely.
Is MAX6348UR46 pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6348UR46 is explicitly stated as pin compatible with MAX803/MAX809/MAX810 in the MAX6348UR46 datasheet Pin Configuration section. All share identical SOT23-3 pinout (VCC, RESET, GND), enabling drop-in replacement where open-drain output and 4.63V threshold meet system requirements-no PCB changes required.
MAX6348UR46 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6348UR46 FAQ
1.How can I place an order for MAX6348UR46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348UR46 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 MAX6348UR46 reliable?
The price and inventory of MAX6348UR46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348UR46 is usually 5 days.
3.What payment methods are accepted for MAX6348UR46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348UR46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348UR46?
MAX6348UR46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348UR46 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 MAX6348UR46?
For technical support, including MAX6348UR46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348UR46 requirements.
6.How does Aetrix verify that MAX6348UR46 is sourced from the original manufacturer or authorized distributors?
All MAX6348UR46 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 MAX6348UR46 meets industry standards.
7.What is the process for return or replacement of MAX6348UR46?
All MAX6348UR46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348UR46, 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 MAX6348UR46 part is unused and in its original packaging.
Return procedure for MAX6348UR46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6348UR46 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…
