My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6804US29D2+T
- Part No.:
- MAX6804US29D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6804US29D2+T.pdf
- Description:
- IC RESET MPU LOW PWR SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:1,648
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6804US29D2+T from Maxim Integrated is a 4-pin SOT143 push/pull active-low microprocessor supervisory circuit with 2.93V reset threshold, 20ms minimum reset timeout, and guaranteed operation down to VCC = 0.7V. It monitors power supplies in 2.85V–5.0V digital systems, asserts RESET during brownout or manual reset, and holds reset for ≥20ms after recovery-used in portable equipment, controllers, and critical µP power monitoring.
For engineers reviewing the MAX6804US29D2+T datasheet, MAX6804US29D2+T pinout, MAX6804US29D2+T application, or MAX6804US29D2+T equivalent, key selection criteria include its factory-trimmed 2.93V threshold, 4.0µA supply current at 3.0V, push/pull output structure, -40°C to +125°C operating range, and compatibility with space-constrained embedded designs requiring reliable power-on reset.
Technical Context
The MAX6804US29D2+T implements a precision bandgap-based reset comparator with ±1.8% threshold accuracy at +25°C and ±3% over full temperature range, immune to fast VCC transients (e.g., ≤30µs at 10V/ms). Its internal 20kΩ MR pullup enables direct connection of a momentary switch to GND without external debounce circuitry.
Reset assertion is synchronized to VCC falling edge and MR logic low; deassertion occurs only after VCC rises above 2.93V (with hysteresis) or MR returns high, followed by a guaranteed ≥20ms timeout period. The push/pull output drives RESET low actively and pulls it high via internal transistor-no external pullup required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.8% at +25°C; ensures reliable detection of 2.85V system supply brownout |
| Reset Timeout Period | 20ms min (nominal 30ms); meets MIL-STD and industrial boot timing requirements |
| Supply Current | 4µA at VCC = 3.0V; enables multi-year battery life in portable instrumentation |
| Operating Voltage Range | 0.7V to 5.5V; guarantees valid RESET state even during deep brownout |
| MR Input Logic | Active-low with 0.3×VCC VIH/0.7×VCC VIL; supports direct switch-to-GND interface |
| RESET Output Type | Push/pull active-low; eliminates need for external pullup resistor in most µP interfaces |
| Temperature Range | -40°C to +125°C; qualified for under-hood automotive and industrial control environments |
Pinout & Package
MAX6804US29D2+T is housed in a 4-pin SOT143 package (U4-1 outline), measuring 1.3mm × 2.9mm × 0.95mm, with gull-wing leads optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for all internal circuitry; must be connected to system ground plane for noise immunity |
| RESET (Pin 2) | Active-low reset output | Push/pull driver asserts low during VCC < 2.93V or MR low; releases high after timeout |
| MR (Pin 3) | Manual-reset input | Logic-low active; internally pulled up to VCC (20kΩ); debounced by design |
| VCC (Pin 4) | Supply voltage input | Power source for internal comparator and output stage; accepts 0.7V–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±1.8% tolerance at +25°C enables precise brownout detection without calibration |
| Ultra-low quiescent current | 4µA at 3.0V allows integration into always-on battery-backed subsystems |
| Guaranteed reset validity to 0.7V VCC | Ensures deterministic µP reset behavior during severe undervoltage conditions |
| Integrated MR pullup resistor | 20kΩ internal pullup eliminates external component count and board space for manual reset |
| Transient-immune comparator | Rejects VCC glitches ≤30µs at 10V/ms, preventing spurious resets in noisy power environments |
Applications
| Portable Medical Instrumentation | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered handheld glucose meters and pulse oximeters require reliable power-on reset during cold-start and low-battery operation. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0 microcontroller during VCC ramp-up and brownout. Use Value: 2.93V threshold matches Li-ion battery discharge profile; 4µA ICC extends shelf life; 0.7V VCC operation ensures reset validity until battery depletion. | Use Scenario: DIN-rail mounted programmable logic controller modules operate in electrically noisy factory environments with fluctuating 24VDC supplies. IC Role / Device Role / Timing Role: Power supervisor generating 20ms minimum reset pulse to isolate FPGA configuration during 24V supply sag. Use Value: ±3% threshold stability over -40°C to +125°C prevents false resets; transient immunity rejects EMI-induced VCC dips. |
| Automotive Body Control Units | Smart Energy Metering Hardware |
Use Scenario: Under-hood BCMs experience wide VCC variation (5.5V cranking → 6.5V load dump) and extreme ambient temperatures. IC Role / Device Role / Timing Role: Reset generator interfacing with Infineon AURIX TC2xx MCU, asserting RESET during cold-cranking undervoltage events. Use Value: Valid operation down to 0.7V VCC ensures reset assertion even during deep cranking; 125°C rating supports placement near engine bay electronics. | Use Scenario: ANSI C12.20-compliant electricity meters require tamper-resistant power monitoring during AC line interruptions. IC Role / Device Role / Timing Role: Supervisor triggering secure shutdown and nonvolatile event logging when 3.3V auxiliary rail drops below 2.93V. Use Value: Factory-trimmed 2.93V threshold aligns with meter SoC brownout specification; 20ms timeout satisfies ANSI power-fail holdoff timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6314US29D2+T | Same 2.93V threshold and 20ms timeout, but uses different BiCMOS process; higher ICC (8µA typ at 3.0V) | Lacks guaranteed 0.7V VCC operation; specified only down to 1.0V | Select when lower cost is prioritized and deep brownout coverage is not required |
| TPS3808G29DBVR | 2.93V threshold, 20ms timeout, but open-drain output; requires external pullup | Higher ICC (12µA); no internal MR pullup-needs external RC debounce | Choose for TI ecosystem designs where open-drain flexibility is needed for wired-OR reset buses |
Compared with MAX6314US29D2+T and TPS3808G29DBVR, the MAX6804US29D2+T uniquely combines 0.7V VCC operation, push/pull output, and integrated MR pullup-enabling simpler, more robust reset architecture in battery-critical and automotive applications.
Availability
MAX6804US29D2+T is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6804US29D2+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 MAX6803/MAX6804/MAX6805 family delivers ultra-low-power, factory-trimmed supervisory circuits targeting space-constrained embedded systems needing deterministic reset behavior during brownout, power-up, and manual intervention.
FAQ
What is the exact reset threshold voltage of MAX6804US29D2+T and how tightly is it specified?
The MAX6804US29D2+T has a factory-trimmed reset threshold of 2.93V, with ±1.8% accuracy at +25°C and ±3% over the full -40°C to +125°C temperature range. This specification is guaranteed per Maxim's Electrical Characteristics table and ensures consistent brownout detection across environmental conditions without user calibration. The 29 suffix in MAX6804US29D2+T explicitly denotes the 2.93V threshold variant.
Does MAX6804US29D2+T require an external pullup resistor on the RESET pin?
No, MAX6804US29D2+T does not require an external pullup resistor on the RESET pin because it features a push/pull output structure. The internal driver actively pulls RESET high when deasserted, eliminating the need for external components. This distinguishes it from open-drain alternatives like MAX6805US29D2+T, which do require a pullup.
What is the minimum VCC voltage at which MAX6804US29D2+T guarantees correct RESET/RESET output states?
MAX6804US29D2+T guarantees correct RESET output states down to VCC = 0.7V across the full -40°C to +125°C temperature range. This is explicitly documented in the Absolute Maximum Ratings and Electrical Characteristics tables, enabling reliable reset assertion even during deep brownout conditions where other supervisors may fail.
How is the manual-reset input (MR) debounced in MAX6804US29D2+T, and what external components are needed?
The MR input of MAX6804US29D2+T is debounced internally via circuit design-no external RC network is required. It includes a 20kΩ internal pullup resistor, allowing direct connection of a normally open momentary switch between MR and GND. The datasheet confirms glitch immunity of 50ns and a minimum MR pulse width of 1µs, ensuring robust manual reset initiation without added BOM cost.
What are the absolute maximum ratings for VCC and RESET pin voltages in MAX6804US29D2+T?
For MAX6804US29D2+T, the absolute maximum VCC is +6V, and the RESET pin voltage must remain within -0.3V to (VCC + 0.3V) when asserted. These ratings are defined in the Absolute Maximum Ratings table and apply across the full operating temperature range. Exceeding them risks permanent device damage, regardless of duration.
MAX6804US29D2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- 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:
- 20ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143-4
MAX6804US29D2+T FAQ
1.How can I place an order for MAX6804US29D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6804US29D2+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 MAX6804US29D2+T reliable?
The price and inventory of MAX6804US29D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6804US29D2+T is usually 5 days.
3.What payment methods are accepted for MAX6804US29D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6804US29D2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6804US29D2+T?
MAX6804US29D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6804US29D2+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 MAX6804US29D2+T?
For technical support, including MAX6804US29D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6804US29D2+T requirements.
6.How does Aetrix verify that MAX6804US29D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6804US29D2+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 MAX6804US29D2+T meets industry standards.
7.What is the process for return or replacement of MAX6804US29D2+T?
All MAX6804US29D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6804US29D2+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 MAX6804US29D2+T part is unused and in its original packaging.
Return procedure for MAX6804US29D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6804US29D2+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…
