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 MPU/RESET CIRC 2.30V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,519
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, designed for 1.8V–3.3V digital systems. It monitors VCC and asserts RESET when voltage falls below 2.30V (±1.8% at +25°C), maintains reset for ≥20ms after recovery, operates down to 0.7V supply, draws only 3.3µA at 2.5V, and provides transient-immune power-on/brownout reset for embedded controllers.
For engineers reviewing the MAX6333UR23D2+T datasheet, MAX6333UR23D2+T pinout, MAX6333UR23D2+T application, or MAX6333UR23D2+T equivalent, key selection criteria include guaranteed RESET validity to 0.7V, factory-trimmed 2.3V threshold with ±3% temp drift, 20ms min timeout, push/pull output drive capability, and SOT23-3 footprint compatibility with MAX809/MAX6326 families.
Technical Context
The MAX6333UR23D2+T implements a precision bandgap-based reset comparator with hysteresis, immune to fast VCC transients up to 24µs at 10V/ms slew rate. Its internal timing circuit generates a fixed 20ms minimum reset pulse width after VCC rises above the 2.30V threshold, independent of external components.
It uses 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. No external capacitor or resistor is required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.30V ±1.8% at +25°C; ±3% over -40°C to +125°C - ensures reliable brownout detection for 2.5V systems |
| Reset Timeout | 20ms minimum - guarantees sufficient processor initialization time after power recovery |
| Supply Voltage Range | 0.7V to 5.5V - supports ultra-low-voltage operation during battery brownout |
| Supply Current | 3.3µA typical at 2.5V - enables multi-year battery life in portable equipment |
| Output Type | Active-low push/pull - drives reset line directly without pull-up resistor |
| Operating Temp | -40°C to +125°C - qualified for automotive under-hood and industrial control environments |
| VCC Propagation Delay | 24µs max at 10V/ms - rejects short power glitches without false resets |
Pinout & Package
MAX6333UR23D2+T is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 0.8mm footprint and 0.95mm height. Pin 1 = GND, Pin 2 = RESET (active-low push/pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Reference ground for reset comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Active-low push/pull output; drives microcontroller reset pin low during fault and for ≥20ms post-recovery |
| 3 | VCC | Power input (0.7V–5.5V); supplies internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.30V threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area |
| 20ms fixed reset timeout | Guarantees full microcontroller initialization before release, no timing capacitor required |
| 0.7V minimum operating voltage | Ensures valid RESET assertion even during deep battery discharge or cold-start conditions |
| 3.3µA supply current at 2.5V | Enables integration into always-on sensor nodes without compromising battery lifetime |
| SOT23-3 footprint | Provides space-constrained designs with drop-in compatibility to MAX809/MAX6326 families |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power monitoring in DIN-rail mounted programmable logic controllers exposed to 24VDC supply ripple and cold ambient (-40°C). IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 MCU during 24V-to-3.3V LDO brownout. Use Value: Guaranteed RESET validity down to 0.7V and -40°C to +125°C operation prevents spurious reboots during voltage sags. | Use Scenario: Battery-powered ECG monitor requiring >5-year shelf life and reliable startup from depleted Li-ion cells. IC Role / Device Role / Timing Role: Reset generator holding ADuCM360 microcontroller in reset until 3.3V rail stabilizes post-power-on. Use Value: 3.3µA quiescent current and 20ms timeout ensure deterministic boot sequence without external timing components. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: 12V battery-supplied BCM subjected to load-dump transients and cranking-induced dips. IC Role / Device Role / Timing Role: Brownout detector triggering reset on 3.3V domain when main supply drops below 2.30V threshold. Use Value: 24µs glitch immunity and ±3% temperature-stable threshold prevent false resets during engine start. | Use Scenario: Revenue-grade meter operating from AC/DC converter with variable output under partial-load conditions. IC Role / Device Role / Timing Role: Power supervisor asserting RESET to MSP430F6779 during AC dropout events lasting <100ms. Use Value: Factory-trimmed 2.30V threshold matches 2.5V rail tolerance; 20ms timeout aligns with meter firmware initialization window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2+T | 2.32V reset threshold (±2.5%), 140ms timeout, same SOT23-3 package | Longer timeout may delay system startup; higher threshold less suitable for 2.5V rails near lower spec limit | Select when longer reset hold time is required and 2.32V threshold is acceptable for target VCC margin |
| MAX6326UR23D2+T | Same 2.30V threshold, 20ms timeout, but open-drain output requiring external pull-up | Open-drain allows wired-OR reset bus sharing; incompatible with direct-drive CMOS reset inputs | Select only if system requires bidirectional reset arbitration or shared reset bus topology |
Compared with MAX809TRD2+T and MAX6326UR23D2+T, the MAX6333UR23D2+T offers tighter threshold accuracy (±1.8% vs ±2.5%), push/pull output eliminating external components, and optimized 20ms timeout for fast-boot microcontrollers-making it ideal for space-constrained, low-power 2.5V systems.
Availability
MAX6333UR23D2+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters 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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX633x family delivers ultra-low-voltage, low-power microprocessor supervisory circuits targeting space-constrained, battery-sensitive applications where guaranteed reset behavior down to 0.7V and minimal external components are critical.
FAQ
What is the exact reset threshold voltage for MAX6333UR23D2+T and how does it vary with temperature?
The MAX6333UR23D2+T has a nominal reset threshold of 2.30V at +25°C, with ±1.8% initial tolerance. Over the full -40°C to +125°C operating range, the threshold varies by ±3% around the nominal value, meaning it remains within 2.23V to 2.37V across temperature. This stability ensures consistent brownout detection in automotive and industrial environments where ambient temperature swings are extreme.
Does MAX6333UR23D2+T require any external components to function as a reset supervisor?
No, the MAX6333UR23D2+T requires zero external components for basic operation. Its factory-trimmed 2.30V threshold, internal timing circuit for 20ms reset timeout, and push/pull output eliminate the need for external resistors, capacitors, or pull-up networks. This reduces PCB area, BOM cost, and design validation effort compared to adjustable reset ICs.
What is the minimum supply voltage at which MAX6333UR23D2+T guarantees valid RESET assertion?
The MAX6333UR23D2+T guarantees correct RESET assertion and deassertion down to VCC = 0.7V across the full -40°C to +125°C temperature range. Below 0.7V, the device may not maintain defined output states. This ultra-low operating voltage enables reliable reset generation during deep battery discharge in portable equipment.
How does the push/pull output of MAX6333UR23D2+T differ from open-drain alternatives like MAX6326UR23D2+T?
The MAX6333UR23D2+T features a push/pull output that actively drives RESET low during fault and high during normal operation, eliminating the need for an external pull-up resistor. In contrast, MAX6326UR23D2+T uses an open-drain output requiring a pull-up to define the high state. This makes MAX6333UR23D2+T simpler to integrate in point-to-point reset applications but unsuitable for wired-OR reset buses.
Is MAX6333UR23D2+T pin-compatible with legacy reset ICs such as MAX809?
Yes, MAX6333UR23D2+T is pin-compatible with MAX809 series devices in the SOT23-3 package, sharing identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments. However, users must verify that the 2.30V threshold and 20ms timeout meet system requirements, as MAX809 variants offer different thresholds and timeout options.
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:
- 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:
- 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…
