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Analog Devices Inc./Maxim Integrated MAX6800UR29D3+
- Part No.:
- MAX6800UR29D3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR29D3+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:635
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Product details
Overview
MAX6800UR29D3+ from Maxim Integrated is a precision push/pull active-high microprocessor reset supervisor IC designed for reliable power-on, brownout, and supply monitoring in space-constrained embedded systems. It features a factory-trimmed 2.93V reset threshold (±3% over temperature), 100ms minimum reset timeout, ultra-low 4µA supply current at 3V, and guaranteed operation down to VCC = 0.7V. It is used in portable battery-powered equipment to ensure deterministic μP initialization during low-voltage conditions.
For engineers reviewing the MAX6800UR29D3+ datasheet, MAX6800UR29D3+ pinout, MAX6800UR29D3+ application, or MAX6800UR29D3+ equivalent, key selection criteria include its active-high RESET output, SOT23-3 package compatibility, 2.93V threshold tolerance across -40°C to +125°C, and immunity to fast VCC transients up to 30µs at 100mV overdrive.
Technical Context
The MAX6800UR29D3+ implements a precision bandgap-based voltage comparator with hysteresis to detect VCC falling below 2.93V, asserting an active-high RESET signal until VCC rises above threshold and remains stable for ≥100ms. Its BiCMOS process enables guaranteed functionality down to 0.7V VCC while maintaining push/pull drive strength.
Unlike open-drain alternatives, this variant sources current during reset assertion (VOH ≥ 0.8×VCC at ISOURCE = 800µA) and sinks current when deasserted (VOL ≤ 0.4V at ISINK = 3.2mA), eliminating external pull-up requirements and supporting direct interface to high-impedance μP reset inputs.
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 consistent brownout detection across industrial temperature range |
| Reset Timeout Period | 100ms minimum - provides sufficient hold time for slow-ramping power supplies and flash memory initialization |
| Supply Current | 4µA typical at VCC = +3.0V - enables multi-year battery life in always-on monitoring applications |
| Operating VCC Range | 0.7V to 5.5V - supports operation during deep brownout and full 5V system rails |
| RESET Output Type | Push/pull active-high - eliminates need for external pull-up resistor and reduces BOM count |
| VCC Transient Immunity | Rejects negative transients ≤30µs at 100mV overdrive - prevents false resets from switching noise or load dumps |
| Junction Temp Limit | +150°C - allows deployment in under-hood automotive or high-power industrial enclosures |
Pinout & Package
MAX6800UR29D3+ is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051), with 1.3mm × 2.9mm footprint and 0.95mm height - compatible with standard pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be connected directly to system ground plane |
| 2 (RESET) | Active-high reset output | Push/pull driver asserts logic-high during reset condition; sinks up to 3.2mA when deasserted |
| 3 (VCC) | Supply voltage input | Monitored rail input; powers internal circuitry and defines VOH/ VOL levels; accepts 0.7V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±3% tolerance over full temperature range - eliminates manual calibration and external resistive dividers |
| Ultra-low quiescent current | 4µA at 3V - extends battery life in portable instrumentation without sacrificing supervision accuracy |
| Guaranteed operation to 0.7V VCC | Ensures valid RESET assertion even during severe brownout - critical for fail-safe shutdown sequencing |
| Transient-immune comparator | Rejects VCC glitches ≤30µs wide - prevents spurious resets in noisy DC-DC converter environments |
| SOT23-3 footprint | 3-pin, 1.3mm × 2.9mm package - enables placement in tight spaces where larger supervisors cannot fit |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered ECG and pulse oximeter units requiring reliable startup after cold boot or low-battery recovery. IC Role / Device Role / Timing Role: Active-high reset supervisor ensuring μC enters known state before sensor initialization and data transmission. Use Value: 2.93V threshold matches Li-ion battery discharge curve; 100ms timeout accommodates slow analog front-end power-up. |
Use Scenario: DIN-rail mounted programmable logic controller modules exposed to 24VDC field wiring noise. IC Role / Device Role / Timing Role: Brownout detector that holds μP in reset during line dips or inductive kickback events on 5V logic rail. Use Value: 30µs transient immunity prevents false resets from relay coil switching; 0.7V operation maintains supervision during undervoltage lockout. |
| Automotive Body Control Units | Smart Energy Meters |
|
Use Scenario: Under-hood BCMs operating from vehicle battery with wide temperature (-40°C to +125°C) and load-dump stress. IC Role / Device Role / Timing Role: Primary reset source for ARM Cortex-M4 core, synchronized to 5V domain power stabilization. Use Value: ±3% threshold stability over temperature avoids marginal reset behavior at extremes; BiCMOS process ensures reliability at +150°C junction. |
Use Scenario: Revenue-grade electricity meters with tamper detection and real-time clock backup powered by supercapacitors. IC Role / Device Role / Timing Role: Supervisor for metering SoC during capacitor discharge phase, asserting reset before voltage falls below safe operating level. Use Value: 4µA ICC enables >10-year supercap lifetime; 2.93V threshold aligns with supercap end-of-discharge voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3+T | 2.93V threshold, 100ms timeout, active-low open-drain output, 1.2µA ICC | Requires external pull-up; not suitable for direct connection to μP pins expecting active-high reset | Select when legacy board uses open-drain topology or shared reset bus with other devices |
| TLV803EC29DBZR | 2.93V threshold, 140ms timeout, active-high push/pull, 0.5µA ICC, SOT23-3 | Lower supply current but tighter 1.5% threshold tolerance; rated only to +105°C | Select for extended battery life in commercial-temperature consumer devices where 125°C rating is unnecessary |
Compared with MAX809TRD3+T and TLV803EC29DBZR, the MAX6800UR29D3+ uniquely combines industrial temperature range (-40°C to +125°C), guaranteed 0.7V operation, and active-high push/pull drive in a single SOT23-3 package - making it optimal for ruggedized embedded systems where reset polarity and low-voltage robustness are non-negotiable.
Availability
MAX6800UR29D3+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply across long production lifecycles.
Supply support for MAX6800UR29D3+ 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, communications, and computing applications - emphasizing reliability, low power, and integration.
The MAX6800 family delivers highly accurate, low-quiescent-current reset supervision for microprocessors in harsh environments - targeting applications where deterministic power-up behavior and brownout resilience are mission-critical.
FAQ
What is the exact reset threshold voltage of MAX6800UR29D3+ and how stable is it over temperature?
The MAX6800UR29D3+ 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 stability ensures consistent brownout detection across automotive and industrial thermal environments without requiring external calibration components.
Does MAX6800UR29D3+ require an external pull-up resistor on its RESET pin?
No. The MAX6800UR29D3+ features a push/pull active-high RESET output capable of sourcing up to 800µA and sinking up to 3.2mA. This eliminates the need for an external pull-up resistor, reducing BOM count and PCB area compared to open-drain alternatives like the MAX6802UR29D3+.
What is the minimum supply voltage at which MAX6800UR29D3+ guarantees correct reset assertion?
The MAX6800UR29D3+ guarantees correct reset assertion down to VCC = 0.7V across the full -40°C to +125°C temperature range. This capability ensures fail-safe behavior during deep brownout conditions where other supervisors may release reset prematurely.
How does MAX6800UR29D3+ handle fast voltage transients on the VCC line?
The MAX6800UR29D3+ reset comparator rejects negative-going VCC transients ≤30µs in duration when the overdrive exceeds 100mV, as verified in the Typical Operating Characteristics graph (MAX6800/01/02 toc05). This immunity prevents false resets caused by switching regulator noise or inductive load spikes.
Is MAX6800UR29D3+ pin-compatible with other members of the MAX6800 family or legacy Maxim supervisors?
Yes. The MAX6800UR29D3+ shares the same 3-pin SOT23-3 pinout and footprint with all MAX6800/MAX6801/MAX6802 variants, and is explicitly stated as pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 - enabling drop-in replacement in existing designs.
MAX6800UR29D3+ 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:
- Obsolete
- 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 High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6800UR29D3+ FAQ
1.How can I place an order for MAX6800UR29D3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR29D3+ 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 MAX6800UR29D3+ reliable?
The price and inventory of MAX6800UR29D3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR29D3+ is usually 5 days.
3.What payment methods are accepted for MAX6800UR29D3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR29D3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR29D3+?
MAX6800UR29D3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR29D3+ 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 MAX6800UR29D3+?
For technical support, including MAX6800UR29D3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR29D3+ requirements.
6.How does Aetrix verify that MAX6800UR29D3+ is sourced from the original manufacturer or authorized distributors?
All MAX6800UR29D3+ 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 MAX6800UR29D3+ meets industry standards.
7.What is the process for return or replacement of MAX6800UR29D3+?
All MAX6800UR29D3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR29D3+, 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 MAX6800UR29D3+ part is unused and in its original packaging.
Return procedure for MAX6800UR29D3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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