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Analog Devices Inc./Maxim Integrated MAX6800UR29D3+T
- Part No.:
- MAX6800UR29D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR29D3+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,117
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Product details
Overview
MAX6800UR29D3+T from Maxim Integrated is a precision push/pull active-high microprocessor supervisory circuit in SOT23-3 package, monitoring 2.93V supply thresholds with 100ms minimum reset timeout, ultra-low 4µA supply current, and guaranteed operation down to VCC = 0.7V. It ensures reliable power-on reset for embedded controllers and battery-powered instrumentation.
For engineers reviewing the MAX6800UR29D3+T datasheet, MAX6800UR29D3+T pinout, MAX6800UR29D3+T application, or MAX6800UR29D3+T equivalent, this page delivers verified electrical specs, thermal performance across –40°C to +125°C, reset timing behavior under fast VCC transients, and validated alternatives for industrial-grade μP reset design.
Technical Context
The MAX6800UR29D3+T implements a factory-trimmed bandgap-based voltage comparator with ±1.8% threshold accuracy at +25°C and ±3% over full temperature range, paired with an internal timer generating a precise 100ms (min) active-high reset pulse after VCC rises above 2.93V. Its push/pull output drives CMOS inputs directly without external pull-up.
Designed for brownout immunity, the reset comparator rejects transients ≤30µs at 100mV overdrive and exhibits <1µs propagation delay variation from –40°C to +125°C. The BiCMOS process enables stable operation at VCC as low as 0.7V while maintaining valid RESET assertion state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.8% at +25°C; ensures accurate detection of 3.0V rail brownout |
| Reset Timeout Period | 100ms (min); guarantees sufficient hold time for μP initialization sequences |
| Supply Current | 4µA at VCC = 3.0V; enables multi-year battery life in portable equipment |
| Operating Voltage Range | 0.7V to 5.5V; supports valid reset assertion during deep brownout recovery |
| Output Type | Active-high push/pull; eliminates need for external pull-up resistor on RESET line |
| Temperature Range | –40°C to +125°C; qualified for automotive under-hood and industrial control environments |
| VCC Propagation Delay | 30µs max at 10V/ms VCC fall rate; prevents false resets from fast supply glitches |
Pinout & Package
MAX6800UR29D3+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, optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal comparator and output driver; must be connected to system ground plane |
| 2 (RESET) | Active-High Reset Output | Push/pull CMOS output asserted high during VCC undervoltage and for 100ms after recovery |
| 3 (VCC) | Supply Input | Monitored power rail input; powers internal circuitry and defines reset threshold reference |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Threshold | 2.93V with ±1.8% tolerance at +25°C enables drop-in replacement without calibration |
| Ultra-Low ICC | 4µA typical at 3.0V allows integration into always-on sensor nodes without compromising battery life |
| Brownout Immunity | Rejects transients ≤30µs at 100mV overdrive, preventing spurious resets in noisy power environments |
| Valid Output Down to 0.7V | Guaranteed RESET logic state integrity even as VCC collapses below 1.0V |
| Three Timeout Options | 100ms minimum pulse width satisfies ARM Cortex-M and PIC MCU boot timing requirements |
Applications
| Industrial PLC Controllers | Portable Medical Monitors |
|---|---|
Use Scenario: Power sequencing in programmable logic controllers exposed to 24V DC field bus noise and wide ambient temperature swings. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting controlled startup after 24V supply stabilizes above 2.93V, holding reset for ≥100ms. Use Value: Prevents firmware lockup during factory floor voltage sags by guaranteeing reset pulse exceeds CPU boot ROM execution window. | Use Scenario: Battery-powered ECG monitor requiring >5-year shelf life and reliable wake-from-sleep recovery. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output feeding ADC and Bluetooth SoC; asserts active-high RESET during battery discharge below 2.93V. Use Value: 4µA quiescent current extends primary lithium cell life; 100ms timeout ensures BLE radio reinitialization completes before application code resumes. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Under-hood BCM operating from 12V battery with load-dump transients and cold-crank voltage drops. IC Role / Device Role / Timing Role: Supervises 5.0V system rail; asserts RESET when VCC falls below 2.93V during cranking, sustaining signal for 100ms post-recovery. Use Value: Valid down to 0.7V ensures deterministic reset behavior even during 0.9V cold-crank events, avoiding undefined MCU states. | Use Scenario: DIN-rail mounted meter exposed to grid surges and long-term storage at –40°C. IC Role / Device Role / Timing Role: Resets meter's real-time clock and metrology ASIC upon AC/DC converter output dip below 2.93V. Use Value: –40°C to +125°C qualification ensures timing accuracy across seasonal extremes; 100ms pulse accommodates EEPROM write cycles during power restoration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D3+T | Same 2.93V threshold and 100ms timeout, but open-drain active-low output | Requires external pull-up; incompatible with systems needing active-high assertion | Select only if legacy design uses active-low reset architecture and board layout cannot accommodate pull-up resistor |
| TPS3808G33DBVR | 2.93V threshold, 200ms min timeout, 1.8V–6.0V VCC range, active-high push/pull | Higher ICC (12µA), wider VCC range, longer timeout - better for high-noise 6V systems | Choose when extended timeout or broader supply compatibility outweighs 3× higher quiescent current |
Compared with MAX6800UR29D3+T, MAX6326UT29D3+T requires redesign of reset logic polarity and adds BOM cost for pull-up, while TPS3808G33DBVR trades 8µA extra supply current for enhanced transient robustness and 6V operation-critical for automotive 12V-derived rails.
Availability
MAX6800UR29D3+T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6800UR29D3+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 and mixed-signal ICs for industrial, automotive, and computing applications, with emphasis on reliability and low-power operation.
The MAX6800 family delivers single-function, ultra-low-power μP reset supervision with factory-trimmed thresholds and guaranteed sub-1V operation-targeted at space- and battery-constrained embedded systems demanding deterministic power-up behavior.
FAQ
What is the exact reset threshold voltage of MAX6800UR29D3+T and how tightly is it specified?
The MAX6800UR29D3+T has a nominal reset threshold of 2.93V, factory-trimmed to ±1.8% at +25°C and ±3% over the full –40°C to +125°C temperature range. This specification ensures consistent brownout detection across environmental conditions without requiring external calibration. The MAX6800UR29D3+T achieves this via laser-trimmed bandgap references within its BiCMOS process.
Does MAX6800UR29D3+T assert reset during fast VCC transients, and what is its immunity level?
No-MAX6800UR29D3+T is designed to ignore fast negative-going VCC transients. Its reset comparator rejects pulses ≤30µs wide when overdriven by 100mV, per the Maximum Transient Duration vs. Reset Comparator Overdrive graph in the datasheet. This immunity prevents spurious resets in electrically noisy environments like motor drives or switching power supplies, ensuring only sustained undervoltage events trigger MAX6800UR29D3+T.
Can MAX6800UR29D3+T operate reliably when VCC drops below 1.0V, and what is the minimum functional voltage?
Yes-MAX6800UR29D3+T is guaranteed to maintain correct reset state down to VCC = 0.7V, with full functionality including valid active-high RESET assertion. Electrical Characteristics confirm operation from 0.7V to 5.5V at –40°C to +125°C. This capability ensures deterministic behavior during deep brownouts common in battery-powered systems, where other supervisors may fail silently. The MAX6800UR29D3+T achieves this via optimized BiCMOS biasing.
What is the purpose of the "D3" suffix in MAX6800UR29D3+T, and how does it affect timing?
The "D3" suffix in MAX6800UR29D3+T indicates a factory-programmed minimum reset timeout period of 100ms. Per the Selector Guide, "D1" = 1ms, "D2" = 20ms, and "D3" = 100ms. This fixed timing ensures the MAX6800UR29D3+T holds its active-high RESET signal for ≥100ms after VCC rises above 2.93V-sufficient for most microcontrollers to complete internal PLL lock and memory initialization. No external components adjust this value.
Is MAX6800UR29D3+T pin-compatible with other reset ICs, and which ones are confirmed?
Yes-MAX6800UR29D3+T is pin-compatible with MAX809/MAX810, MAX6326/MAX6327/MAX6328, and MAX6346/MAX6347/MAX6348 in the same SOT23-3 package. Pin 1 = GND, Pin 2 = RESET (active-high push/pull), Pin 3 = VCC. However, output polarity and timeout differ: MAX809 is active-low, MAX6326 is open-drain active-low. Direct substitution requires verification of reset logic polarity and timing requirements in the target system using MAX6800UR29D3+T.
MAX6800UR29D3+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:
- 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+T FAQ
1.How can I place an order for MAX6800UR29D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR29D3+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 MAX6800UR29D3+T reliable?
The price and inventory of MAX6800UR29D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR29D3+T is usually 5 days.
3.What payment methods are accepted for MAX6800UR29D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR29D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR29D3+T?
MAX6800UR29D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR29D3+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 MAX6800UR29D3+T?
For technical support, including MAX6800UR29D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR29D3+T requirements.
6.How does Aetrix verify that MAX6800UR29D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6800UR29D3+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 MAX6800UR29D3+T meets industry standards.
7.What is the process for return or replacement of MAX6800UR29D3+T?
All MAX6800UR29D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR29D3+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 MAX6800UR29D3+T part is unused and in its original packaging.
Return procedure for MAX6800UR29D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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