My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6801UR29D3+T
- Part No.:
- MAX6801UR29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6801UR29D3+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,925
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6801UR29D3+T from Maxim Integrated is a precision 2.93V active-low microprocessor supervisory circuit in a 3-pin SOT23 package, designed to monitor VCC supply voltage and assert a push/pull RESET signal during power-up, brownout, or power-down events. It guarantees valid reset operation down to 0.7V VCC, features 100ms minimum reset timeout, consumes only 4–12µA supply current, and operates across –40°C to +125°C for industrial and automotive embedded systems.
For engineers reviewing the MAX6801UR29D3+T datasheet, MAX6801UR29D3+T pinout, MAX6801UR29D3+T application, or MAX6801UR29D3+T equivalent, key selection criteria include factory-trimmed 2.93V reset threshold accuracy (±1.8% at +25°C, ±3% over full temperature range), push/pull output drive capability (VOH ≥ 0.8×VCC at ISOURCE = 500µA), transient immunity up to 30µs at 100mV overdrive, and guaranteed reset assertion validity to VCC = 0.7V.
Technical Context
The MAX6801UR29D3+T implements a precision bandgap-based reset comparator with factory-trimmed 2.93V threshold and hysteresis optimized for stable detection of VCC falling below nominal supply levels. Its internal timing circuit generates a fixed 100ms (min) reset pulse width after VCC rises above the threshold, independent of external components.
This device uses BiCMOS process technology to achieve ultra-low 4µA typical supply current at 3.0V and maintains push/pull RESET output logic state integrity down to VCC = 0.7V - enabling reliable reset signaling even during deep brownout conditions where many µPs cease functional operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.8% at +25°C; ±3% over –40°C to +125°C - ensures accurate power-fail detection for 3.3V systems |
| Reset Timeout Period | 100ms (min), 150ms (typ), 200ms (max) - provides sufficient hold time for µP initialization sequences |
| Supply Current | 4µA (typ) at VCC = 3.0V; 5µA (typ) at VCC = 5.0V - enables battery-powered system longevity |
| Operating Voltage Range | 0.7V to 5.5V - supports valid reset assertion during deep undervoltage conditions |
| RESET Output Type | Active-low push/pull - drives high/low actively without external pullup; compatible with standard µP reset inputs |
| VOH (RESET not asserted) | ≥0.8×VCC at ISOURCE = 500µA - ensures robust high-level signaling across full VCC range |
| VOL (RESET asserted) | ≤0.4V at ISINK = 50µA, VCC ≥ 1.0V - guarantees strong low-level assertion for noise-immune reset detection |
Pinout & Package
MAX6801UR29D3+T is housed in a RoHS-compliant 3-pin SOT23 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 0.8mm footprint and 0.95mm height - suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for reset comparator and output stage; must be connected directly to system ground plane |
| 2 | RESET | Active-low push/pull reset output; asserts low when VCC < 2.93V and holds for ≥100ms after VCC recovery |
| 3 | VCC | Primary supply input; powers internal comparator, timer, and output driver; accepts 0.7V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V threshold | Eliminates need for external resistor divider or calibration; ±1.8% accuracy at room temperature ensures consistent trip point across production lots |
| 100ms minimum reset timeout | Guarantees µP reset hold time exceeds typical boot ROM execution duration, preventing premature release from reset |
| 0.7V minimum operating voltage | Enables valid RESET assertion during severe brownout - critical for fail-safe shutdown in automotive and industrial control |
| 4µA typical supply current | Reduces quiescent power draw in always-on monitoring circuits, extending battery life in portable instrumentation |
| Transient immunity | Rejects VCC glitches ≤30µs wide at 100mV overdrive - prevents false resets from switching noise or ESD-induced supply dips |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring 3.3V main supply in programmable logic controllers subject to 12V battery transients and load-dump events. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 µP during brownout. Use Value: 2.93V threshold aligns with 3.3V rail tolerance; 100ms timeout accommodates FPGA configuration time before µP boot. |
Use Scenario: Power supervision in BCMs powered from vehicle battery with cold-crank voltage drops to 6V. IC Role / Device Role / Timing Role: Reset generator ensuring microcontroller remains held in reset until stabilized 5V LDO output reaches 2.93V. Use Value: Valid operation down to 0.7V VCC allows reliable reset assertion even during cranking-induced 5V rail collapse. |
| Medical Patient Monitor Sensors | Smart Energy Metering Units |
Use Scenario: Battery-backed sensor node requiring deterministic reset on Li-ion cell voltage sag below 3.0V. IC Role / Device Role / Timing Role: Low-power supervisor interfacing directly with MSP430F5xx µC reset pin. Use Value: 4µA supply current extends shelf life; push/pull output eliminates need for external pullup resistor, saving board area. |
Use Scenario: Monitoring 3.3V supply in DIN-rail mounted meters exposed to grid surges and neutral loss events. IC Role / Device Role / Timing Role: Brownout detector triggering secure firmware rollback via active-low reset to RISC-V SoC. Use Value: ±3% threshold stability over –40°C to +125°C ensures consistent behavior across outdoor temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 2.93V threshold, 240ms min timeout, same SOT23-3 package, but higher 12µA ICC (typ) at 3.3V | Longer timeout may delay µP startup; higher current reduces battery life in portable designs | Select MAX809TRD3+T only if extended reset hold time is required and supply current is not constrained |
| TLV803EB29DBZR | 2.93V threshold, 140ms min timeout, 0.5µA ICC (typ), but open-drain output requiring external pullup | Open-drain limits drive strength and adds BOM cost; ultra-low current suits energy-harvesting nodes | Choose TLV803EB29DBZR for ultra-low-power applications where external pullup is acceptable and timing margin allows 140ms |
Compared with MAX809TRD3+T and TLV803EB29DBZR, the MAX6801UR29D3+T delivers optimal balance of low 4µA supply current, precise 2.93V threshold, push/pull output eliminating external components, and 100ms timeout aligned with mainstream µP boot requirements - making it ideal for industrial and automotive reset supervision where reliability and component count matter.
Availability
MAX6801UR29D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and smart energy metering units requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MAX6801UR29D3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The MAX6800/MAX6801/MAX6802 family delivers ultra-low-power, precision voltage supervision for microprocessor reset - engineered for harsh environments where supply stability, brownout immunity, and minimal board space are critical.
FAQ
What is the exact reset threshold voltage of MAX6801UR29D3+T and how tightly is it specified?
The MAX6801UR29D3+T has a factory-trimmed nominal reset threshold of 2.93V, with ±1.8% tolerance at +25°C and ±3% over the full –40°C to +125°C operating range. This specification is guaranteed by design and production-tested per Maxim's datasheet Electrical Characteristics table, ensuring consistent brownout detection for 3.3V systems without external calibration.
Does MAX6801UR29D3+T support operation at very low supply voltages, and what is the minimum VCC for valid reset assertion?
Yes, the MAX6801UR29D3+T guarantees correct reset assertion and output state integrity down to VCC = 0.7V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics sections. This enables reliable reset signaling during deep brownout conditions where most µPs are nonfunctional - a key requirement for fail-safe industrial and automotive applications.
What is the reset timeout period of MAX6801UR29D3+T, and is it adjustable?
The MAX6801UR29D3+T provides a fixed 100ms minimum reset timeout period (150ms typical, 200ms maximum), determined by internal timing circuitry. It is not user-adjustable - no external capacitor or resistor is needed. This factory-programmed duration ensures µP reset hold time meets industry-standard boot sequence requirements without design overhead.
How does the push/pull output of MAX6801UR29D3+T differ from open-drain alternatives, and what are the practical implications?
The MAX6801UR29D3+T features an active-low push/pull RESET output, meaning it actively drives both high and low states without requiring an external pullup resistor. This simplifies PCB layout, reduces BOM count, improves noise immunity on the reset line, and ensures faster rise/fall times compared to open-drain variants like the MAX6802UR29D3+T - critical for timing-sensitive µP interfaces.
Is MAX6801UR29D3+T pin-compatible with other common reset ICs, and which ones?
Yes, the MAX6801UR29D3+T is pin-compatible with the MAX809/MAX810 series, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 families - all in the same 3-pin SOT23 package with identical pin 1 (GND), pin 2 (RESET), and pin 3 (VCC) assignments. This allows drop-in replacement in existing designs where 2.93V threshold and 100ms timeout meet system requirements.
MAX6801UR29D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6801UR29D3+T FAQ
1.How can I place an order for MAX6801UR29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6801UR29D3+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 MAX6801UR29D3+T reliable?
The price and inventory of MAX6801UR29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6801UR29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6801UR29D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6801UR29D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6801UR29D3+T?
MAX6801UR29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6801UR29D3+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 MAX6801UR29D3+T?
For technical support, including MAX6801UR29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6801UR29D3+T requirements.
6.How does Aetrix verify that MAX6801UR29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6801UR29D3+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 MAX6801UR29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6801UR29D3+T?
All MAX6801UR29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6801UR29D3+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 MAX6801UR29D3+T part is unused and in its original packaging.
Return procedure for MAX6801UR29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6801UR29D3+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…
