My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6333UR19D3
- Part No.:
- MAX6333UR19D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6333UR19D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,091
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6333UR19D3 from Maxim Integrated is a push/pull active-low microprocessor supervisory circuit in SOT23-3 package, designed to monitor 1.8V–3.3V power supplies and assert RESET when VCC falls below 1.90V (±1.8% at +25°C), with guaranteed operation down to 0.7V and a 100ms minimum reset timeout period.
For engineers reviewing the MAX6333UR19D3 datasheet, MAX6333UR19D3 pinout, MAX6333UR19D3 application, or MAX6333UR19D3 equivalent, this device delivers ultra-low supply current (3.3µA typical at 2.5V), precision reset threshold tolerance over temperature (±3%), transient-immune reset assertion, and compatibility with space-constrained embedded systems requiring reliable power-on/brownout reset signaling.
Technical Context
This IC implements a dedicated voltage-monitoring comparator with factory-trimmed 1.90V threshold and internal timer for fixed 100ms reset pulse width. It operates across -40°C to +125°C and maintains valid RESET output state even as VCC drops to 0.7V - critical for fail-safe boot sequencing in low-voltage microcontrollers.
The push/pull output drives RESET actively high or low without external pull-up, eliminating board-level components. Its comparator ignores transients ≤24µs (at 10V/ms slew), ensuring immunity to short power glitches while responding reliably to sustained brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.90V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures accurate detection of 1.8V supply droop before system instability |
| Reset Timeout Period | 100ms minimum - guarantees sufficient hold time for μP initialization and peripheral stabilization |
| Supply Current | 3.3µA typical at 2.5V - enables use in battery-powered equipment with multi-year standby life |
| Operating Voltage Range | 0.7V to 5.5V - supports operation during deep brownout and full-system power ramp-up |
| Output Type | Active-low push/pull - drives RESET low without external pull-up, simplifying interface to standard μP reset inputs |
| VCC Propagation Delay | 24µs max at 10V/ms - enables fast response to rapid supply collapse while rejecting sub-24µs noise |
Pinout & Package
MAX6333UR19D3 is housed in a 3-pin SOT23-3 package (outline 21-0051), with exposed pad not connected. The compact footprint (1.4mm × 2.9mm) supports high-density PCB layouts in portable and industrial control applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-low push/pull reset output | Drives low during VCC undervoltage and for 100ms after recovery; sinks up to 500µA at VCC ≥ 1.8V |
| 3 (VCC) | Power supply input | Accepts 0.7V–5.5V; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low operating voltage | Functional down to 0.7V VCC - ensures reset assertion remains valid through deep brownout conditions |
| Factory-trimmed precision threshold | 1.90V ±1.8% at +25°C - eliminates need for external resistor dividers or calibration |
| Transient-immune comparator | Rejects VCC glitches ≤24µs - prevents spurious resets from switching noise or ESD-induced dips |
| No external components required | Self-contained reset generation - reduces BOM count, layout area, and qualification effort |
| Guaranteed reset validity over full temp range | Specified -40°C to +125°C - supports automotive under-hood and industrial motor-control environments |
Applications
| Pentium® II Computers | Critical μP/μC Power Monitoring |
|---|---|
Use Scenario: Power sequencing and brownout protection in legacy x86 desktop motherboards with 1.8V/2.5V core rails. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to CPU and chipset during VCC drop below 1.90V, holding for 100ms post-recovery. Use Value: Prevents corrupted boot sequences and memory writes by guaranteeing minimum reset pulse width independent of supply ramp rate. |
Use Scenario: Ensuring deterministic startup in microcontroller-based industrial sensors powered from regulated 1.8V LDOs. IC Role / Device Role / Timing Role: Monitoring VCC and generating a clean, glitch-free reset signal that remains asserted until stable supply is confirmed. Use Value: Eliminates need for RC-based reset circuits whose timing drifts with temperature and component tolerance. |
| Portable/Battery-Powered Equipment | Intelligent Instruments |
Use Scenario: Low-power handheld test meters with coin-cell backup and dual-supply (1.8V logic + 3.3V analog) architecture. IC Role / Device Role / Timing Role: Reset supervisor for main μC, activated when primary battery voltage sags below 1.90V during high-current bursts. Use Value: 3.3µA quiescent current extends battery life; 0.7V operational floor allows reset assertion even during final discharge phase. |
Use Scenario: Precision data loggers deployed in remote environmental monitoring stations with wide-temperature operation requirements. IC Role / Device Role / Timing Role: Providing temperature-stable reset signaling across -40°C to +125°C ambient, using factory-trimmed 1.90V threshold. Use Value: ±3% threshold variation over full temperature range ensures consistent trip point without software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6327UR19D3-T | Same 1.90V threshold and 100ms timeout, but open-drain output; requires external pull-up resistor | Suitable for bidirectional reset pins (e.g., Motorola 68HC11); less suitable for standard CMOS reset inputs without pull-up | Select when interfacing with μPs requiring wired-OR reset bus or level translation |
| TPS3123-19DBVR | 1.91V threshold, 200ms timeout, 1.6V–6.0V VCC range; higher 8µA ICC; SOT23-5 package | Includes manual reset input and watchdog timer - adds functionality but increases pin count and complexity | Select when system requires manual reset capability or watchdog supervision beyond basic voltage monitoring |
Compared with MAX6333UR19D3, MAX6327UR19D3-T offers open-drain flexibility at the cost of added external component and reduced drive strength, while TPS3123-19DBVR provides extended features in a larger package and higher current draw - making MAX6333UR19D3 optimal for minimal-footprint, low-power, single-function reset needs.
Availability
MAX6333UR19D3 is available at Aetrix Electronics and suitable for Pentium® II computers, portable/battery-powered equipment, intelligent instruments, critical μP/μC power monitoring, and industrial embedded controllers requiring stable component supply across extended temperature ranges.
Supply support for MAX6333UR19D3 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 industrial, automotive, communications, and computing applications.
The MAX6332/MAX6333/MAX6334 family was engineered specifically for ultra-low-voltage, low-power microprocessor reset supervision in space-constrained systems - prioritizing minimal quiescent current, guaranteed sub-1V operation, and factory-trimmed accuracy without external components.
FAQ
What is the exact reset threshold voltage of the MAX6333UR19D3?
The MAX6333UR19D3 has a factory-trimmed nominal reset threshold of 1.90V at +25°C, with tolerance of ±1.8% at room temperature and ±3% over the full operating temperature range (-40°C to +125°C). This value is specified in Table 1 of the official datasheet and applies directly to the MAX6333UR19D3 variant.
Does the MAX6333UR19D3 require any external components to function?
No, the MAX6333UR19D3 operates as a fully self-contained reset supervisor. It requires only VCC, GND, and connection of the RESET output to the microprocessor's reset input - no external resistors, capacitors, or trimming components are needed due to its integrated precision comparator and timer.
What is the minimum supply voltage at which the MAX6333UR19D3 guarantees correct reset behavior?
The MAX6333UR19D3 guarantees correct RESET/RESET output state down to VCC = 0.7V across the full temperature range. This is explicitly stated in the datasheet and distinguishes it from alternatives like the MAX6334, which is only guaranteed to 1.0V.
How long does the RESET signal remain asserted after VCC recovers above the threshold in the MAX6333UR19D3?
The MAX6333UR19D3 asserts RESET for a minimum of 100ms after VCC rises above the 1.90V threshold. This fixed timeout period is factory-programmed and specified as tRP = 100ms (min), 150ms (typ), 200ms (max) in the Electrical Characteristics table.
Is the MAX6333UR19D3 pin-compatible with other members of the MAX633x family?
Yes, the MAX6333UR19D3 shares identical SOT23-3 pinout (GND, RESET, VCC) and footprint with all MAX6332/MAX6333/MAX6334 variants, including MAX6333UR22D3-T and MAX6334UR19D3-T - enabling direct substitution where output type and timing match system requirements.
MAX6333UR19D3 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:
- 1.9V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6333UR19D3 FAQ
1.How can I place an order for MAX6333UR19D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6333UR19D3 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 MAX6333UR19D3 reliable?
The price and inventory of MAX6333UR19D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6333UR19D3 is usually 5 days.
3.What payment methods are accepted for MAX6333UR19D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6333UR19D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6333UR19D3?
MAX6333UR19D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6333UR19D3 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 MAX6333UR19D3?
For technical support, including MAX6333UR19D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6333UR19D3 requirements.
6.How does Aetrix verify that MAX6333UR19D3 is sourced from the original manufacturer or authorized distributors?
All MAX6333UR19D3 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 MAX6333UR19D3 meets industry standards.
7.What is the process for return or replacement of MAX6333UR19D3?
All MAX6333UR19D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6333UR19D3, 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 MAX6333UR19D3 part is unused and in its original packaging.
Return procedure for MAX6333UR19D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6333UR19D3 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…
