My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6333UR23D2-T
- Part No.:
- MAX6333UR23D2-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR23D2-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,234
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6333UR23D2-T from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, monitoring 1.8V–3.3V power supplies with factory-trimmed 2.30V reset threshold (±1.8% at +25°C, ±3% over -40°C to +125°C), 20ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It ensures reliable power-on/brownout reset for embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6333UR23D2-T datasheet, MAX6333UR23D2-T pinout, MAX6333UR23D2-T application, or MAX6333UR23D2-T equivalent, this device delivers ultra-low supply current (3.3µA typ. at 2.5V), high noise immunity against fast VCC transients, and precise voltage monitoring without external components-critical for space-constrained, low-power μP systems.
Technical Context
The MAX6333UR23D2-T integrates a precision bandgap-based reset comparator with factory-trimmed 2.30V threshold and a fixed 20ms minimum timeout timer. Its push/pull output drives RESET low during VCC undervoltage and holds it low for ≥20ms after VCC recovers above threshold.
Designed for ultra-low-voltage operation, it maintains valid RESET assertion down to VCC = 0.7V and exhibits transient immunity up to 24µs at 10V/ms VCC fall rate. The comparator ignores sub-24µs negative glitches when overdriven by ≥10mV, ensuring robustness in noisy power environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V (±1.8% at +25°C; ±3% over -40°C to +125°C) - sets precise brownout detection point for 2.3V nominal rails |
| Reset Timeout Period | 20ms minimum - guarantees sufficient hold time for μP initialization after power recovery |
| Supply Current | 3.3µA typical at VCC = 2.5V - enables multi-year battery life in portable equipment |
| Operating Voltage Range | 0.7V to 5.5V - supports operation through deep brownout and compatibility with 1.8V/2.5V/3.3V systems |
| Output Type | Active-low push/pull - provides full rail-to-rail drive without external pull-up, simplifying interface to standard μP RESET inputs |
| VCC Falling Propagation Delay | 24µs at 10V/ms - ensures rapid response to fast supply collapse while rejecting shorter noise spikes |
| RESET Output Low Voltage | 0.3V max at ISINK = 500µA, VCC ≥ 1.8V - guarantees strong logic-low assertion even under load |
Pinout & Package
SOT23-3 package: ultra-compact 3-pin surface-mount outline (1.3mm × 2.9mm × 1.0mm), optimized for PCB area-constrained applications including portable electronics and sensor nodes.
| 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; asserts low during VCC undervoltage and for ≥20ms post-recovery; no external pull-up required |
| 3 | VCC | Power supply input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.30V threshold | Eliminates manual calibration and external resistor dividers, reducing BOM count and layout complexity |
| 20ms minimum reset timeout | Meets μP power-up timing requirements for ARM Cortex-M and PIC microcontrollers without external RC timing |
| 0.7V minimum operating voltage | Ensures deterministic reset behavior during deep brownout conditions where most supervisors fail |
| 3.3µA supply current at 2.5V | Extends battery runtime in always-on IoT sensors and wearables beyond 5 years on coin-cell power |
| VCC transient immunity | Rejects <24µs negative glitches at 10V/ms slew rate, preventing spurious resets in electrically noisy environments |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
Use Scenario: PLC I/O modules powered from 2.4V DC-DC converters subject to load-switching transients. IC Role / Device Role / Timing Role: Monitors 2.4V rail and asserts active-low RESET to ARM Cortex-M4F MCU during brownout events. Use Value: Prevents firmware corruption by guaranteeing ≥20ms reset hold time after VCC recovers above 2.30V, even at -40°C ambient. |
Use Scenario: Handheld glucose meters using CR2032 coin cell with voltage decay from 3.0V to 2.0V over battery life. IC Role / Device Role / Timing Role: Supervises declining 2.3V nominal supply and triggers controlled shutdown before data loss occurs. Use Value: Operates down to 0.7V VCC, enabling full utilization of battery capacity while maintaining valid RESET assertion until final discharge. |
| Automotive Body Control Modules | Smart Sensor Nodes |
Use Scenario: 12V automotive system with 3.3V LDO supplying infotainment microcontroller exposed to cold-crank pulses. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse below 2.30V during engine start and holds RESET active for 20ms post-recovery. Use Value: Immune to ≤24µs cold-crank transients, eliminating false resets that would disrupt CAN bus synchronization. |
Use Scenario: Wireless temperature node powered by energy harvester with intermittent 1.8V output. IC Role / Device Role / Timing Role: Provides deterministic reset signaling when harvested voltage crosses 2.30V threshold during wake-up cycles. Use Value: Ultra-low 3.3µA quiescent current minimizes parasitic drain, extending time between energy harvesting events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UT23D2-T | Same SOT23-3 package, identical 2.30V threshold and 20ms timeout, but open-drain output requiring external pull-up. | Requires pull-up resistor; suitable only where bidirectional reset or wired-OR logic is needed. | Select MAX6327UT23D2-T only if interfacing with μPs having open-drain-compatible reset inputs (e.g., Motorola 68HC11). |
| TPS3808G23DBVR | 2.32V threshold (±0.5% initial accuracy), 20ms timeout, 1.8V–6.0V VCC range, but higher 8µA ICC at 3.3V. | Higher accuracy threshold but consumes >2× more current; not rated for operation below 1.8V VCC. | Choose TPS3808G23DBVR when ±0.5% threshold tolerance is mandatory and supply voltage never drops below 1.8V. |
Compared with MAX6333UR23D2-T, MAX6327UT23D2-T requires external biasing and offers no advantage in low-VCC operation, while TPS3808G23DBVR trades ultra-low current and 0.7V operation for tighter threshold tolerance-making MAX6333UR23D2-T optimal for battery longevity and deep-brownout resilience.
Availability
MAX6333UR23D2-T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body control modules, and smart sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6333UR23D2-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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, automotive, and computing markets.
The MAX6333 series belongs to Maxim's ultra-low-voltage supervisory product line, engineered specifically for reliable reset generation in battery-powered and brownout-prone systems where traditional supervisors fail below 1.0V.
FAQ
What is the exact reset threshold voltage of MAX6333UR23D2-T and how does it vary with temperature?
The MAX6333UR23D2-T has a factory-trimmed nominal reset threshold of 2.30V at +25°C, with ±1.8% tolerance at room temperature and ±3% over the full -40°C to +125°C operating range. This means the actual trip point falls between 2.23V and 2.37V across temperature extremes, ensuring consistent brownout detection in automotive and industrial environments.
Does MAX6333UR23D2-T require any external components to function correctly?
No, MAX6333UR23D2-T operates autonomously with no external resistors, capacitors, or diodes required. Its internal precision comparator, trimmed threshold, and fixed 20ms timeout eliminate all external timing or adjustment components-reducing PCB area, BOM cost, and qualification effort compared to discrete reset solutions.
Can MAX6333UR23D2-T operate reliably when the supply voltage drops below 1.0V?
Yes, MAX6333UR23D2-T is fully specified down to VCC = 0.7V and guarantees correct RESET assertion state throughout that range. Unlike many supervisors that become undefined below 1.0V, this device maintains valid push/pull output behavior, making it suitable for deep-battery-discharge scenarios in portable equipment.
What is the maximum VCC slew rate that MAX6333UR23D2-T can tolerate without issuing a false reset?
MAX6333UR23D2-T tolerates VCC falling at up to 10V/ms without false triggering, with a propagation delay of 24µs under that condition. Its comparator architecture rejects transients shorter than 24µs when overdriven by ≥10mV, providing immunity to switching noise and load-dump spikes common in DC-DC converter outputs.
Is MAX6333UR23D2-T pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6333UR23D2-T is explicitly stated as pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the same SOT23-3 package. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC-enabling drop-in replacement without PCB modification in existing designs.
MAX6333UR23D2-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:
- 2.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR23D2-T FAQ
1.How can I place an order for MAX6333UR23D2-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR23D2-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 MAX6333UR23D2-T reliable?
The price and inventory of MAX6333UR23D2-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR23D2-T is usually 5 days.
3.What payment methods are accepted for MAX6333UR23D2-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR23D2-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR23D2-T?
MAX6333UR23D2-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR23D2-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 MAX6333UR23D2-T?
For technical support, including MAX6333UR23D2-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR23D2-T requirements.
6.How does Aetrix verify that MAX6333UR23D2-T is sourced from the original manufacturer or authorized distributors?
All MAX6333UR23D2-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 MAX6333UR23D2-T meets industry standards.
7.What is the process for return or replacement of MAX6333UR23D2-T?
All MAX6333UR23D2-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR23D2-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 MAX6333UR23D2-T part is unused and in its original packaging.
Return procedure for MAX6333UR23D2-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6333UR23D2-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…
