My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6333UR23D
- Part No.:
- MAX6333UR23D
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR23D.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:389
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6333UR23D from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, monitoring 1.8V–3.3V supplies with factory-trimmed 2.30V reset threshold (±1.8% at +25°C, ±3% over –40°C to +125°C), 100ms minimum reset timeout, and ultra-low 3.3µA supply current at 2.5V. It ensures reliable power-on/brownout reset for embedded controllers and battery-powered systems.
For engineers reviewing the MAX6333UR23D datasheet, MAX6333UR23D pinout, MAX6333UR23D application, or MAX6333UR23D equivalent, key selection criteria include guaranteed RESET validity down to VCC = 0.7V, immunity to fast VCC transients (<24µs propagation delay), push/pull output drive capability (VOH ≥ 0.8×VCC, VOL ≤ 0.3V), and compatibility with space-constrained PCB layouts using 3-pin SOT23.
Technical Context
The MAX6333UR23D implements a precision bandgap-based voltage comparator with factory-trimmed 2.30V threshold and hysteresis optimized for brownout detection. Its internal timer generates a fixed 100ms minimum reset pulse width after VCC rises above VTH, independent of supply ramp rate.
It features a push/pull output stage capable of sourcing ≥200µA at 0.8×VCC and sinking ≥500µA at ≤0.3V, ensuring robust interface with CMOS microcontroller reset inputs across –40°C to +125°C. The device remains fully functional down to VCC = 0.7V, with no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V nominal (±1.8% at +25°C; ±3% over –40°C to +125°C) - ensures accurate brownout detection for 2.5V logic rails |
| Reset Timeout Period | 100ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Current | 3.3µA typical at 2.5V - enables multi-year operation in coin-cell–powered IoT sensors |
| Operating Voltage Range | 0.7V to 5.5V - supports valid reset assertion during deep brownout and full-system power-up |
| Output Type | Active-low push/pull - drives standard CMOS reset inputs without external pull-up resistor |
| VCC Propagation Delay | 24µs max at 10V/ms VCC fall rate - rejects sub-microsecond supply glitches |
| Temperature Range | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
MAX6333UR23D is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - suitable for high-density portable PCBs.
| 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 push/pull output; asserts low during VCC < 2.30V and holds for ≥100ms after VCC recovery |
| 3 | VCC | Power supply input (0.7V–5.5V); powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.30V with ±1.8% tolerance at +25°C - eliminates manual calibration and external resistor networks |
| Ultra-low operating voltage | Functional down to VCC = 0.7V - maintains reset integrity during severe brownout conditions |
| Transient-immune comparator | Rejects VCC glitches <24µs duration - prevents spurious resets in noisy power environments |
| No external components required | Self-contained reset generation - reduces BOM count and PCB area vs. discrete RC+comparator solutions |
| Guaranteed reset timing over temperature | 100ms min timeout stable across –40°C to +125°C - ensures consistent processor boot behavior |
Applications
| Industrial PLC Controllers | Portable Medical Sensors |
|---|---|
Use Scenario: Microcontroller-based programmable logic controllers deployed in factory automation with fluctuating 24V DC-DC derived 3.3V rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M4 during input rail brownout or cold-start. Use Value: Prevents firmware corruption by guaranteeing ≥100ms reset hold time after 3.3V rail recovers to 2.30V, even at –40°C ambient. | Use Scenario: Battery-powered glucose meters using coin-cell supply and low-power MSP430 MCU. IC Role / Device Role / Timing Role: Power-on reset generator and brownout detector for ultra-low-quiescent-current system startup. Use Value: 3.3µA supply current extends single-CR2032 battery life beyond 5 years; 0.7V operation ensures reset validity until battery depletes to 0.8V. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-dash BCMs powered from vehicle battery via LDO, subject to load-dump and cranking transients. IC Role / Device Role / Timing Role: Reset supervisor interfacing directly with Infineon AURIX TC3xx reset input pin. Use Value: 24µs VCC-fall propagation delay rejects cranking-induced dips; push/pull output eliminates need for external pull-up on safety-critical reset line. | Use Scenario: DIN-rail mounted electricity meters with isolated 3.3V auxiliary supply and dual-core secure MCU. IC Role / Device Role / Timing Role: Independent power-monitoring circuit ensuring deterministic reset during AC mains interruption. Use Value: Factory-trimmed 2.30V threshold matches meter's 2.5V rail tolerance; 100ms timeout satisfies IEC 62053-21 power-fail hold requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT23D3-T | Same 2.30V threshold and 100ms timeout, but open-drain output requiring external pull-up | Requires additional 10kΩ pull-up resistor; less suitable for noise-sensitive reset lines without series R | Select when bidirectional reset interface (e.g., with 68HC11) or wired-OR reset bus is needed |
| TPS3123E18DBVR | 2.63V threshold (not 2.30V); 200ms timeout; higher 8µA ICC; same SOT23-3 package | Higher threshold limits use on 2.5V rails near upper spec; longer timeout may delay system boot | Select only if 2.63V detection point aligns with system margin requirements and 200ms reset is acceptable |
Compared with MAX6333UR23D, MAX6326UT23D3-T requires external biasing and offers different output topology, while TPS3123E18DBVR shifts threshold and timeout - neither is pin-compatible, and both demand layout or firmware validation for drop-in replacement.
Availability
MAX6333UR23D is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6333UR23D 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 industrial, automotive, and computing applications, with emphasis on reliability and integration.
The MAX6332/MAX6333/MAX6334 product line delivers ultra-low-voltage, low-power μP supervisory circuits targeting space-constrained and battery-operated systems requiring deterministic reset behavior.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6333UR23D?
The MAX6333UR23D has a factory-trimmed nominal reset threshold of 2.30V, with ±1.8% tolerance at +25°C and ±3% tolerance over the full –40°C to +125°C operating range. This value is confirmed in Table 1 of the official datasheet and corresponds to the "UR23D" suffix in the part number. The threshold is set using laser trimming during production and does not require external adjustment.
Does MAX6333UR23D support operation below 1.0V supply voltage?
Yes, MAX6333UR23D is guaranteed to operate and assert valid RESET down to VCC = 0.7V across –40°C to +125°C, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This ultra-low operating voltage enables reliable reset assertion during deep brownout events where other supervisors fail, making it suitable for energy-harvesting and long-life battery applications.
What is the minimum reset timeout period for MAX6333UR23D?
The minimum reset timeout period for MAX6333UR23D is 100ms, as indicated by the "D3" suffix in the ordering part number MAX6333UR23D3-T. This value is guaranteed over temperature and supply voltage, with typical values ranging from 100ms to 200ms depending on process variation. The timeout begins when VCC rises above the 2.30V threshold and ensures sufficient time for microprocessor initialization.
Can MAX6333UR23D drive a standard CMOS microcontroller reset input without external components?
Yes, MAX6333UR23D features a push/pull active-low output that can directly drive standard CMOS reset inputs without any external pull-up or pull-down resistors. Its VOH reaches ≥0.8×VCC when not asserted and VOL remains ≤0.3V when asserted (at ISINK = 500µA, VCC ≥ 1.8V), meeting common MCU reset input voltage thresholds across its full operating range.
Is MAX6333UR23D pin-compatible with legacy Maxim reset ICs like MAX809?
Yes, MAX6333UR23D is explicitly stated as pin-compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328 in the Benefits and Features section of the datasheet. All share identical SOT23-3 pinout (VCC, RESET, GND), enabling direct PCB-level replacement in existing designs - though designers must verify matching reset threshold, timeout, and output type (push/pull vs. open-drain) for functional equivalence.
MAX6333UR23D 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:
- 2.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR23D FAQ
1.How can I place an order for MAX6333UR23D through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR23D 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 MAX6333UR23D reliable?
The price and inventory of MAX6333UR23D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR23D is usually 5 days.
3.What payment methods are accepted for MAX6333UR23D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR23D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR23D?
MAX6333UR23D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR23D 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 MAX6333UR23D?
For technical support, including MAX6333UR23D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR23D requirements.
6.How does Aetrix verify that MAX6333UR23D is sourced from the original manufacturer or authorized distributors?
All MAX6333UR23D 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 MAX6333UR23D meets industry standards.
7.What is the process for return or replacement of MAX6333UR23D?
All MAX6333UR23D units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR23D, 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 MAX6333UR23D part is unused and in its original packaging.
Return procedure for MAX6333UR23D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6333UR23D 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…
