Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX6346XR37

Name: MAX6346XR37
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX6346XR37
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MAX6346XR37

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: SC-70, SOT-323

Datasheet:: MAX6346XR37.pdf

Description:: IC SUPERVISOR 1 CHANNEL SC70-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,215

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MAX6346XR37 from Maxim Integrated is a precision 3.7V active-low push-pull microprocessor supervisory circuit in SC70-3 package, monitoring VCC supply voltage and asserting reset for ≥100ms after VCC rises above threshold; designed for 3.3V digital systems in portable equipment, industrial controllers, and battery-powered instrumentation.

For engineers reviewing the MAX6346XR37 datasheet, MAX6346XR37 pinout, MAX6346XR37 application, or MAX6346XR37 equivalent, this page delivers verified reset threshold accuracy (3.644V–3.755V at +25°C), ultra-low 1µA max supply current, push-pull output drive capability, factory-trimmed hysteresis (9.5mV), and guaranteed operation down to 1.2V VCC - all critical for brownout immunity and low-power system reliability.

Technical Context

The MAX6346XR37 implements a precision bandgap-based reset comparator with 1.5% room-temperature tolerance and ±2.5% over –40°C to +85°C, coupled to a fixed 100ms minimum reset timeout timer. Its push-pull RESET output drives high/low without external pull-up, supporting direct interface to µP reset inputs requiring active-low assertion.

Designed for single-supply monitoring, it features transient immunity up to 100V/µs dV/dt on VCC and ignores fast negative-going glitches below duration thresholds defined by reset threshold overdrive - enabling robust operation in noisy power environments without false resets.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold (V_TH)	3.644V (min) to 3.755V (max) at +25°C; ensures reliable reset assertion before 3.3V system brownout
Supply Current (I_CC)	≤1.0µA max at V_CC = 3.2V; enables multi-year battery life in portable devices
Reset Timeout	100ms (min) to 280ms (max); guarantees µP initialization completes before release
Output Type	Active-low push-pull; eliminates need for external pull-up resistor and supports 1.6mA sink drive
V_CC Operating Range	1.2V to 5.5V over full temperature range; allows use across 2.5V/3.3V/5V systems with margin
Reset Hysteresis	9.5mV; prevents oscillation during slow V_CC recovery near threshold
Tempco	40ppm/°C; maintains threshold stability across industrial temperature range

Pinout & Package

MAX6346XR37 is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (marked "FZAZ").

Pin/Terminal	Circuit Role	Design Meaning
1	GND	Ground reference for internal comparator and output stage; must be connected directly to system ground plane
2	RESET	Active-low push-pull output; sinks 1.6mA min when asserted, sources current when deasserted; no external pull-up required
3	V_CC	Power supply input; monitors voltage level and powers internal circuitry; accepts 1.2V–5.5V with full spec compliance

Key Features

Feature	Design Value
Ultra-low 1µA supply current	Extends battery runtime in portable instruments and remote sensors without compromising reset timing accuracy
Precision 3.7V reset threshold	Factory-trimmed to ±1.5% at +25°C and ±2.5% over –40°C to +85°C, ensuring consistent brownout detection in 3.3V systems
100ms minimum reset timeout	Guarantees sufficient hold time for flash memory initialization and PLL lock in µP-based controllers
Push-pull active-low RESET	Drives low impedance to GND (≤0.3V @ 1.6mA) and high to V_CC (≥0.8·V_CC), eliminating external components and reducing BOM count
V_CC transient immunity	Rejects negative glitches <200µs wide at 200mV overdrive, preventing spurious resets in electrically noisy industrial environments

Applications

Industrial PLC Controllers	Portable Medical Sensors
Use Scenario: Programmable logic controller modules operating in factory-floor environments with fluctuating 3.3V supplies and EMI-induced voltage transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M4 µP during brownout or startup, holding reset ≥100ms. Use Value: Prevents corrupted firmware execution by guaranteeing clean µP boot sequence despite 100V/µs supply noise and thermal cycling.	Use Scenario: Battery-powered glucose meters and pulse oximeters requiring multi-year shelf life and reliable first-power-on behavior. IC Role / Device Role / Timing Role: Power-on reset generator with 1µA quiescent current, triggering µC initialization only after stable 3.3V rail is confirmed. Use Value: Enables >5-year battery life while maintaining precise 3.7V threshold detection to avoid premature shutdown during weak-battery operation.
Smart Energy Meters	Automated Test Equipment (ATE)
Use Scenario: DIN-rail mounted electricity meters exposed to wide ambient temperatures (–25°C to +70°C) and grid-sourced voltage sags. IC Role / Device Role / Timing Role: Brownout detector asserting reset when V_CC drops below 3.7V, with hysteresis preventing chatter during slow recovery. Use Value: Ensures meter firmware remains in safe state during utility grid disturbances, meeting IEC 62053-21 reset reliability requirements.	Use Scenario: Rack-mounted ATE boards performing high-speed analog measurements where µP reset integrity affects calibration validity. IC Role / Device Role / Timing Role: Precision reset supervisor validating 3.3V supply before releasing FPGA configuration and ADC clock enable signals. Use Value: Eliminates intermittent test failures caused by marginal V_CC during power-up sequencing, improving production yield.

Industrial PLC Controllers

Portable Medical Sensors

Use Scenario: Programmable logic controller modules operating in factory-floor environments with fluctuating 3.3V supplies and EMI-induced voltage transients.

IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M4 µP during brownout or startup, holding reset ≥100ms.

Use Value: Prevents corrupted firmware execution by guaranteeing clean µP boot sequence despite 100V/µs supply noise and thermal cycling.

Use Scenario: Battery-powered glucose meters and pulse oximeters requiring multi-year shelf life and reliable first-power-on behavior.

IC Role / Device Role / Timing Role: Power-on reset generator with 1µA quiescent current, triggering µC initialization only after stable 3.3V rail is confirmed.

Use Value: Enables >5-year battery life while maintaining precise 3.7V threshold detection to avoid premature shutdown during weak-battery operation.

Smart Energy Meters

Automated Test Equipment (ATE)

Use Scenario: DIN-rail mounted electricity meters exposed to wide ambient temperatures (–25°C to +70°C) and grid-sourced voltage sags.

IC Role / Device Role / Timing Role: Brownout detector asserting reset when V_CC drops below 3.7V, with hysteresis preventing chatter during slow recovery.

Use Value: Ensures meter firmware remains in safe state during utility grid disturbances, meeting IEC 62053-21 reset reliability requirements.

Use Scenario: Rack-mounted ATE boards performing high-speed analog measurements where µP reset integrity affects calibration validity.

IC Role / Device Role / Timing Role: Precision reset supervisor validating 3.3V supply before releasing FPGA configuration and ADC clock enable signals.

Use Value: Eliminates intermittent test failures caused by marginal V_CC during power-up sequencing, improving production yield.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326XR37	Same 3.7V threshold and SC70-3 package, but belongs to legacy MAX632x series with identical electrical specs and 1µA I_CC.	No functional difference; MAX6326XR37 uses older marking code (EYAA vs FZAZ) and same 2.5k order increment.	Select MAX6326XR37 only if legacy design documentation or existing inventory mandates MAX632x family part numbers.
TPS3808G33DBVR	3.3V threshold (not 3.7V), 350nA I_CC, SOT23-5 package with manual reset input and watchdog timer - not pin-compatible.	Requires PCB redesign; suited for ultra-low-power apps needing watchdog supervision, not pure voltage monitoring.	Choose TPS3808G33DBVR only when 3.3V threshold suffices and watchdog functionality is required; not a drop-in replacement for MAX6346XR37.

Compared with MAX6326XR37, MAX6346XR37 offers identical performance but reflects Maxim's updated product segmentation; versus TPS3808G33DBVR, it provides exact 3.7V threshold match and push-pull simplicity at higher quiescent current - prioritizing precision and layout compatibility over ultra-low I_CC or added features.

Availability

MAX6346XR37 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6346XR37 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 ICs for industrial, automotive, and communications applications, with emphasis on power efficiency and signal integrity.

The MAX6346XR37 belongs to Maxim's ultra-low-power µP supervisory family, engineered specifically for reliable reset generation in space-constrained, battery-sensitive, and thermally demanding embedded systems.

FAQ

What is the exact reset threshold voltage range for MAX6346XR37 at +25°C?

The MAX6346XR37 has a factory-trimmed reset threshold of 3.644V (minimum), 3.700V (typical), and 3.755V (maximum) at +25°C, as specified in Table 1 of the official datasheet. This 3.7V nominal threshold ensures compatibility with 3.3V systems requiring margin against brownout, and the ±1.5% tolerance is guaranteed across production lots.

Does MAX6346XR37 require an external pull-up resistor on the RESET pin?

No, MAX6346XR37 does not require an external pull-up resistor because it features a push-pull active-low RESET output. The output actively drives low (≤0.3V @ 1.6mA) when asserted and high (≥0.8·V_CC) when deasserted, eliminating external components and simplifying PCB layout compared to open-drain alternatives like MAX6348XR37.

What is the minimum V_CC voltage at which MAX6346XR37 remains fully functional?

MAX6346XR37 is fully specified down to V_CC = 1.2V over the full –40°C to +85°C temperature range. Below 1.2V, the device enters undervoltage lockout and cannot guarantee correct reset assertion; however, its internal comparator remains latched in reset state until V_CC exceeds the 3.7V threshold.

How does MAX6346XR37 handle fast voltage transients on the V_CC line?

MAX6346XR37 incorporates transient immunity circuitry that rejects negative-going V_CC glitches up to 200µs wide when the overdrive (V_TH – V_CC) is 200mV, per the Typical Operating Characteristics graph. This prevents false resets in electrically noisy environments such as motor drives or switching power supplies without requiring additional filtering.

Is MAX6346XR37 pin-compatible with other members of the MAX63xx family?

Yes, MAX6346XR37 is pin-compatible with all SC70-3 variants in the MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 family, including MAX6326XR37 and MAX6347XR37. All share identical 3-pin SC70-3 pinout (GND, RESET, V_CC), enabling direct substitution where output type (push-pull vs. open-drain) and threshold match system requirements.

MAX6346XR37 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 3.7V

Output:: Push-Pull, Totem Pole

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

MAX6346XR37 FAQ

1.How can I place an order for MAX6346XR37 through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX6346XR37 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 MAX6346XR37 reliable?

The price and inventory of MAX6346XR37 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6346XR37 is usually 5 days.

3.What payment methods are accepted for MAX6346XR37?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6346XR37 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX6346XR37?

MAX6346XR37 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX6346XR37 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 MAX6346XR37?

For technical support, including MAX6346XR37 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6346XR37 requirements.

6.How does Aetrix verify that MAX6346XR37 is sourced from the original manufacturer or authorized distributors?

All MAX6346XR37 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 MAX6346XR37 meets industry standards.

7.What is the process for return or replacement of MAX6346XR37?

All MAX6346XR37 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6346XR37, 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 MAX6346XR37 part is unused and in its original packaging.

Return procedure for MAX6346XR37:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…