My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6348UR46-T
- Part No.:
- MAX6348UR46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6348UR46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,058
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6348UR46-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 4.63V power supplies and assert reset during brownout, power-up, and power-down events. It delivers ultra-low 1µA max supply current, guarantees correct operation down to 1V VCC, provides ≥100ms reset timeout after VCC recovery, and features factory-trimmed ±1.5% (25°C) / ±2.5% (-40°C to +85°C) reset threshold accuracy.
For engineers reviewing the MAX6348UR46-T datasheet, MAX6348UR46-T pinout, MAX6348UR46-T application, or MAX6348UR46-T equivalent, key selection criteria include its open-drain RESET output for bidirectional µP interface compatibility, immunity to fast VCC transients, no external component requirement, and SOT23-3 packaging for space-constrained embedded systems.
Technical Context
The MAX6348UR46-T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 9.5mV hysteresis to reject noise and ensure stable reset assertion. Its internal timing circuit guarantees minimum 100ms reset pulse width after VCC rises above 4.63V, with full specification across -40°C to +85°C.
As part of the MAX634x series, it shares identical SC70/SOT23-3 footprint and pinout with MAX632x/MAX634x family members but differs exclusively in reset threshold (4.63V) and output type (open-drain), enabling direct substitution where voltage and drive requirements match.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V nominal, ±1.5% at +25°C - ensures reliable detection of 4.63V supply collapse before system malfunction |
| Supply Current | 1µA max at +25°C - enables multi-year battery life in portable equipment without compromising supervision integrity |
| Reset Timeout | 100ms min after VCC recovery - guarantees sufficient hold time for µP initialization and peripheral stabilization |
| Operating Range | VCC = 1.2V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1.2V |
| Output Type | Open-drain RESET - allows wired-OR configuration and direct interface with bidirectional µP reset pins (e.g., Motorola 68HC11) |
| Tempco | 40ppm/°C - limits threshold drift to <±12mV over full -40°C to +85°C range, ensuring consistent trip point |
| Transient Immunity | Rejects VCC glitches ≤200µs at 200mV overdrive - prevents false resets from switching noise or ESD-induced dips |
Pinout & Package
MAX6348UR46-T uses a 3-pin SOT23-3 package (outline U3-1, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - compatible with high-density PCB layouts and standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low open-drain output; requires external pull-up to VCC or another logic rail; sinks ≥1.6mA when asserted |
| 3 | VCC | Power supply input; monitors this rail for reset condition; operates from 1.2V to 5.5V with guaranteed functionality down to 1V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in coin-cell-powered IoT sensors and wearables |
| Factory-trimmed reset threshold | 4.63V ±1.5% at +25°C eliminates need for external resistor dividers or calibration |
| Open-drain output architecture | Supports multi-source reset arbitration and level-shifting via external pull-up to non-VCC rails |
| Full temperature specification | Guaranteed performance from -40°C to +85°C ensures reliability in automotive under-hood and industrial control environments |
| No external components required | Reduces BOM count, PCB area, and qualification effort versus discrete reset solutions |
Applications
| Industrial PLCs | Battery-Powered Sensors |
|---|---|
Use Scenario: Monitoring 4.63V auxiliary supply in programmable logic controller I/O modules during mains interruption or backup battery switchover. IC Role / Device Role / Timing Role: Active-low open-drain reset supervisor asserting hold signal to ARM Cortex-M7 MCU until regulated 4.63V rail stabilizes post-failover. Use Value: Prevents spurious I/O state changes and firmware corruption by guaranteeing ≥100ms reset pulse width independent of input transient duration. | Use Scenario: Supervising coin-cell-powered environmental sensor node operating on 4.63V LDO output during cold-temperature storage and wake-up cycles. IC Role / Device Role / Timing Role: Ultra-low-power (1µA) reset generator monitoring VCC to initiate clean boot sequence only after stable 4.63V supply is confirmed. Use Value: Extends shelf life and field deployment duration by eliminating parasitic current paths that would drain CR2032 cells prematurely. |
| Medical Diagnostic Handhelds | Motor Control Gate Drivers |
Use Scenario: Ensuring deterministic startup of FPGA-based imaging subsystem powered by 4.63V rail in portable ultrasound devices. IC Role / Device Role / Timing Role: Open-drain RESET output pulled up to FPGA I/O voltage (3.3V), enabling bidirectional reset handshake with FPGA configuration logic. Use Value: Eliminates need for level-shifter IC while maintaining robust glitch immunity per Maxim's transient rejection spec (≤200µs @ 200mV overdrive). | Use Scenario: Monitoring isolated 4.63V gate driver supply in BLDC motor inverter to prevent shoot-through during undervoltage conditions. IC Role / Device Role / Timing Role: Reset supervisor asserting fault signal to PWM controller when gate driver VCC drops below 4.63V, disabling all outputs until safe recovery. Use Value: Provides fail-safe protection with ±2.5% threshold tolerance over full temperature range, preventing MOSFET damage due to insufficient gate drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6346UR46-T | Push-pull active-low RESET output instead of open-drain; same 4.63V threshold and SOT23-3 package | Requires no external pull-up; unsuitable for wired-OR or level-shifted reset buses | Select MAX6346UR46-T only when driving single-load CMOS inputs directly and board layout prohibits pull-up resistors |
| MAX809TR46-T | Same 4.63V threshold and SOT23-3 package, but higher 20µA supply current and no guaranteed operation below 1.2V | Limited to higher-power applications; lacks deep-brownout capability for ultra-low-voltage systems | Choose MAX809TR46-T only if legacy design reuse is required and 1µA quiescent current is not critical |
Compared with MAX6346UR46-T and MAX809TR46-T, the MAX6348UR46-T uniquely combines open-drain flexibility, 1µA ultra-low power, and guaranteed sub-1.2V operation-making it optimal for battery-critical, multi-source reset, or wide-input-range embedded systems.
Availability
MAX6348UR46-T is available at Aetrix Electronics and suitable for industrial PLCs, battery-powered sensors, medical handhelds, motor control gate drivers, and portable instrumentation requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX6348UR46-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 precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX634x family was engineered specifically for ultra-low-power, high-accuracy microprocessor reset supervision in space- and energy-constrained systems-prioritizing sub-1µA operation, factory-trimmed thresholds, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of MAX6348UR46-T and how tightly is it specified?
The MAX6348UR46-T has a nominal reset threshold of 4.63V, factory-trimmed to ±1.5% at +25°C and ±2.5% over the full -40°C to +85°C operating range. This precision eliminates manual calibration and ensures consistent brownout detection across temperature extremes without external components.
Does MAX6348UR46-T support operation below 1.2V VCC, and what is its minimum functional voltage?
Yes, the MAX6348UR46-T is guaranteed to maintain correct reset state down to 1V VCC, with full electrical specifications valid from 1.2V to 5.5V. This deep-brownout capability ensures reliable supervision during severe supply sags where many competing supervisors cease functioning.
How does the open-drain output of MAX6348UR46-T differ from push-pull alternatives like MAX6346UR46-T?
The MAX6348UR46-T's open-drain RESET output requires an external pull-up resistor and enables wired-OR configurations, bidirectional reset handshaking (e.g., with Motorola 68HC11), and level shifting to non-VCC logic rails. In contrast, MAX6346UR46-T's push-pull output drives high/low actively but cannot share a common reset bus.
What is the maximum transient duration that MAX6348UR46-T can ignore without asserting reset?
The MAX6348UR46-T rejects VCC transients up to 200µs in duration when the overdrive (VTH – VCC) is 200mV, per Maxim's Typical Operating Characteristics graph. Shorter transients at larger overdrive magnitudes are also suppressed, providing robust immunity to switching noise and ESD-induced dips.
Is MAX6348UR46-T pin-compatible with industry-standard reset ICs such as MAX809 or MAX810?
Yes, the MAX6348UR46-T is pin-compatible with MAX803/MAX809/MAX810 in the SOT23-3 package, sharing identical pinout (VCC, RESET, GND) and footprint. However, designers must verify that the open-drain output and 1µA supply current meet system-level interface and power budget requirements.
MAX6348UR46-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-T FAQ
1.How can I place an order for MAX6348UR46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348UR46-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 MAX6348UR46-T reliable?
The price and inventory of MAX6348UR46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348UR46-T is usually 5 days.
3.What payment methods are accepted for MAX6348UR46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348UR46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348UR46-T?
MAX6348UR46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348UR46-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 MAX6348UR46-T?
For technical support, including MAX6348UR46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348UR46-T requirements.
6.How does Aetrix verify that MAX6348UR46-T is sourced from the original manufacturer or authorized distributors?
All MAX6348UR46-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 MAX6348UR46-T meets industry standards.
7.What is the process for return or replacement of MAX6348UR46-T?
All MAX6348UR46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348UR46-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 MAX6348UR46-T part is unused and in its original packaging.
Return procedure for MAX6348UR46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6348UR46-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…
