My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6348XR39-T
- Part No.:
- MAX6348XR39-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6348XR39-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,768
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6348XR39-T from Maxim Integrated is an open-drain, active-low microprocessor supervisory circuit designed to monitor 3.9V power supplies in embedded systems. It asserts reset when VCC falls below 3.90V ±2.5% over temperature, maintains reset for ≥100ms after recovery, draws ≤1µA supply current at 3.3V, and operates from 1.2V to 5.5V supply range - enabling use in battery-powered controllers and portable instrumentation.
For engineers reviewing the MAX6348XR39-T datasheet, MAX6348XR39-T pinout, MAX6348XR39-T application, or MAX6348XR39-T equivalent, this page delivers verified reset threshold accuracy, open-drain output behavior, SC70-3 package compatibility, ultra-low quiescent current, and transient-immune brownout detection - all critical for reliable µP reset design in space-constrained industrial and portable systems.
Technical Context
The MAX6348XR39-T implements a precision bandgap-based voltage comparator with factory-trimmed 3.90V reset threshold (±1.5% at +25°C, ±2.5% over −40°C to +85°C) and 9.5mV hysteresis. Its reset timeout is guaranteed ≥100ms with typical value of 185ms and maximum of 280ms across temperature.
It features open-drain RESET output capable of sinking 1.6mA at 0.3V (VCC > 2.1V), leakage <0.1µA when deasserted, and immunity to VCC transients up to 200µs at 100mV overdrive - validated by Maxim's Maximum Transient Duration vs. Reset Threshold Overdrive characterization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.90V ±2.5% over −40°C to +85°C - ensures reliable brownout detection for 3.9V nominal rails |
| Supply Current | ≤1.0µA max at 3.3V - enables multi-year operation on coin-cell batteries |
| Reset Timeout | 100ms min, 185ms typ, 280ms max - guarantees sufficient µP initialization time after power recovery |
| Output Type | Open-drain RESET - supports wired-OR configurations and bidirectional µP reset pins (e.g., Motorola 68HC11) |
| VCC Operating Range | 1.2V to 5.5V - allows supervision of low-voltage logic and legacy 5V systems with single device |
| Transient Immunity | Rejects VCC glitches ≤200µs at 100mV overdrive - prevents false resets during switching noise |
| Package | SC70-3 (3-pin) - 2.0mm × 2.1mm footprint ideal for compact PCB layouts |
Pinout & Package
MAX6348XR39-T is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), with 100% lead-free construction (RoHS compliant). Pin 1 = GND, Pin 2 = RESET (open-drain), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection |
| 2 | RESET | Active-low open-drain output; requires external pull-up to system VCC or compatible rail |
| 3 | VCC | Power supply input; monitors itself for undervoltage; functional down to 1.2V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA supply current | Extends battery life in portable instruments and remote sensors without compromising reset reliability |
| Factory-trimmed 3.90V threshold | Eliminates external resistor networks and calibration - reduces BOM count and assembly cost |
| 100ms minimum reset timeout | Guarantees full µP core and peripheral initialization before release, even under worst-case temperature drift |
| Open-drain RESET output | Enables direct interface to bidirectional reset pins and multi-source reset arbitration in complex systems |
| −40°C to +85°C operation | Validated performance across industrial ambient conditions without derating or external compensation |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: PLC I/O modules powered from 3.9V DC-DC converters in factory automation cabinets. IC Role / Device Role / Timing Role: Monitors 3.9V rail and asserts open-drain RESET to ARM Cortex-M4 controller during brownout events. Use Value: Prevents firmware corruption by holding µP in reset until stable 3.9V is restored and maintained for ≥100ms. |
Use Scenario: Handheld glucose meters using CR2032 coin cell with boost converter regulating 3.9V system rail. IC Role / Device Role / Timing Role: Supervises 3.9V supply and triggers reset if battery voltage sag causes rail collapse. Use Value: Ensures deterministic startup and data integrity despite variable battery discharge profile and load transients. |
| Smart Energy Meters | Test & Measurement Equipment |
|
Use Scenario: DIN-rail mounted electricity meters with isolated 3.9V auxiliary supply derived from mains. IC Role / Device Role / Timing Role: Provides fail-safe reset signaling to metering SoC during AC line sags or surges affecting DC rail. Use Value: Maintains accurate energy accumulation by preventing partial execution cycles during unstable power conditions. |
Use Scenario: Benchtop oscilloscopes requiring precise timing synchronization between FPGA, ADC, and display subsystems. IC Role / Device Role / Timing Role: Generates synchronized power-on reset pulse to coordinate initialization of multiple clock domains. Use Value: Eliminates metastability and race conditions during cold start by enforcing deterministic reset sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328XR39-T | Same 3.90V threshold, identical SC70-3 package, but rated only to +70°C operating temperature | Limited to commercial-grade environments; not qualified for extended industrial temperature range | Select MAX6348XR39-T when operation from −40°C to +85°C is required |
| TPS3808G39DBVR | 3.9V threshold, open-drain output, but higher 1.8µA typical supply current and SOT23-3 package only | Higher quiescent current reduces battery lifetime; lacks SC70-3 option for ultra-dense layouts | Choose MAX6348XR39-T for lowest power and smallest footprint in space-constrained designs |
Compared with MAX6328XR39-T, the MAX6348XR39-T extends temperature qualification to +85°C while retaining identical electrical specs and SC70-3 packaging; versus TPS3808G39DBVR, it delivers 44% lower max supply current and offers SC70-3 for tighter board area utilization.
Availability
MAX6348XR39-T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart energy meters, and test & measurement equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6348XR39-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6348XR39-T belongs to Maxim's ultra-low-power µP supervisory family, engineered specifically for reliable, low-cost power monitoring in battery-operated and thermally demanding embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6348XR39-T?
The MAX6348XR39-T has a factory-trimmed nominal reset threshold of 3.90V, with tolerance of ±1.5% at +25°C and ±2.5% over the full −40°C to +85°C operating temperature range. This value is confirmed in Table 1 of the official datasheet and applies specifically to the "R39" suffix variant of the MAX6348 family.
Does the MAX6348XR39-T have a push-pull or open-drain RESET output?
The MAX6348XR39-T features an active-low open-drain RESET output, as explicitly stated in the General Description and Pin Description sections. This configuration requires an external pull-up resistor and enables wired-OR reset bus architectures - a key distinction from the push-pull variants like MAX6346XR39-T.
What package type and dimensions does the MAX6348XR39-T use?
The MAX6348XR39-T is supplied in a 3-pin SC70-3 package (outline X3-2), measuring 2.0mm × 2.1mm with 0.65mm pitch. This information is documented in the Package Information section and Ordering Information table, and the "X" in the part number denotes SC70 packaging.
What is the maximum supply current specification for the MAX6348XR39-T?
The MAX6348XR39-T draws a maximum supply current of 1.0µA at 3.3V and room temperature, as specified in the Electrical Characteristics table under "Supply Current (ICC)". At 5.5V, the max increases to 1.75µA - both values confirmed in the official datasheet.
Is the MAX6348XR39-T compatible with bidirectional microprocessor reset pins?
Yes - the MAX6348XR39-T's open-drain RESET output is explicitly designed for interfacing with bidirectional µP reset pins such as those found on the Motorola 68HC11, as detailed in the Applications Information section. A single external pull-up resistor enables mutual reset assertion between the supervisor and the µP.
MAX6348XR39-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.9V
- 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:
- SC-70-3
MAX6348XR39-T FAQ
1.How can I place an order for MAX6348XR39-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6348XR39-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 MAX6348XR39-T reliable?
The price and inventory of MAX6348XR39-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6348XR39-T is usually 5 days.
3.What payment methods are accepted for MAX6348XR39-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6348XR39-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6348XR39-T?
MAX6348XR39-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6348XR39-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 MAX6348XR39-T?
For technical support, including MAX6348XR39-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6348XR39-T requirements.
6.How does Aetrix verify that MAX6348XR39-T is sourced from the original manufacturer or authorized distributors?
All MAX6348XR39-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 MAX6348XR39-T meets industry standards.
7.What is the process for return or replacement of MAX6348XR39-T?
All MAX6348XR39-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6348XR39-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 MAX6348XR39-T part is unused and in its original packaging.
Return procedure for MAX6348XR39-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6348XR39-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…
