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Analog Devices Inc./Maxim Integrated MAX6404BS33-T
- Part No.:
- MAX6404BS33-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 4-WFBGA, CSPBGA
- Datasheet:
-
MAX6404BS33-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 4UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6404BS33-T from Maxim Integrated is an ultra-low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-trimmed 3.30V ±2.5% threshold (–40°C to +85°C), 100ms minimum reset timeout, and 500nA typical supply current at 3.0V - designed for reliable power-on/brownout detection in battery-powered portable electronics.
For engineers reviewing the MAX6404BS33-T datasheet, MAX6404BS33-T pinout, MAX6404BS33-T application, or MAX6404BS33-T equivalent, this device delivers precise voltage monitoring with guaranteed reset validity down to VCC = 1.0V, immunity to fast VCC transients, manual reset input support, and compact UCSP-4 packaging - critical for space-constrained, low-quiescent-current designs.
Technical Context
The MAX6404BS33-T integrates a precision bandgap reference comparator and internal timing circuitry to assert an active-high RESET signal when VCC falls below 3.30V, holding it high for ≥100ms after VCC recovers. Its reset logic is inverted relative to MAX6403/MAX6405, enabling direct interface with µPs requiring active-high reset assertion.
It features a manual reset (MR) input with internal 50kΩ pullup, 200ns MR-to-reset delay, and 1µs minimum MR pulse width. The device operates across VCC = 1.2V to 5.5V and guarantees correct output state down to VCC = 1.0V, with ±2.5% threshold accuracy over full temperature range and 40ppm/°C tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.30V ±2.5% (–40°C to +85°C); ensures reliable brownout detection at nominal 3.3V system rails |
| Reset Output Type | Active-high push-pull; drives high during fault and for ≥100ms after recovery - no external pullup required |
| Supply Current | 500nA (typ) at 3.0V; enables multi-year battery life in always-on portable devices |
| Reset Timeout Period | 100ms (min); meets µP power-up initialization timing requirements per JEDEC JESD22-A107 |
| VCC Operating Range | 1.2V to 5.5V; supports operation during deep brownout and compatibility with 1.8V–5V logic domains |
| MR Input Logic | Active-low with 50kΩ internal pullup; allows momentary switch-to-GND interface without external components |
| Reset Propagation Delay | 20µs max (VCC transition from VTH+100mV to VTH−100mV); rejects sub-20µs noise transients on VCC |
Pinout & Package
Package: 4-bump UCSP (2×2 mm, 0.5mm pitch), qualified for surface-mount assembly per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for internal comparator and output driver; must be low-impedance connection to system ground plane |
| RESET | Active-high push-pull output | Drives high during VCC undervoltage and for ≥100ms post-recovery; sinks 1.2mA / sources 500µA at VCC ≥ 2.1V |
| MR | Manual reset input | Active-low control with internal 50kΩ pullup to VCC; asserts reset while low and for full tRP after release |
| VCC | Supply and monitor input | Power source and monitored rail; device functions correctly down to 1.2V and asserts valid reset down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 500nA typical at 3.0V - extends shelf life and runtime in coin-cell–powered devices |
| Factory-trimmed threshold | 3.30V with ±2.5% tolerance over –40°C to +85°C - eliminates calibration and external resistors |
| Guaranteed reset validity | RESET remains functional down to VCC = 1.0V - ensures fail-safe behavior during deep brownout |
| Transient immunity | Rejects VCC glitches <20µs duration - prevents spurious resets in noisy power environments |
| No external components | Self-contained supervision with integrated reference, timer, and MR pullup - reduces BOM count and PCB area |
Applications
| Portable Medical Devices | Wearable Fitness Trackers |
|---|---|
Use Scenario: Continuous glucose monitors and pulse oximeters operating from single CR2032 cells with wide discharge curves. IC Role / Device Role / Timing Role: Monitors declining battery voltage and asserts active-high RESET to halt firmware execution before data corruption occurs. Use Value: Prevents memory write errors during brownout by guaranteeing reset assertion down to VCC = 1.0V, matching Li-MnO₂ cell end-of-life voltage. |
Use Scenario: Bluetooth-enabled wristbands with sleep-mode current <1µA and infrequent wake events. IC Role / Device Role / Timing Role: Provides deterministic power-on reset and manual reset via button press, with 500nA supply current preserving battery charge between sync cycles. Use Value: Enables >2-year battery life using standard coin cells while maintaining JEDEC-compliant 100ms reset hold time. |
| Industrial Sensor Nodes | Smart Home Remotes |
Use Scenario: LoRaWAN soil moisture sensors deployed in remote locations with solar-charged LiFePO₄ batteries. IC Role / Device Role / Timing Role: Detects under-voltage conditions during low-light charging periods and triggers controlled shutdown via active-high RESET to EEPROM. Use Value: Eliminates need for external voltage divider or comparator, reducing component count and leakage paths in IP67-enclosed housings. |
Use Scenario: RF remotes powered by alkaline AAA batteries with variable load profiles and cold-temperature operation. IC Role / Device Role / Timing Role: Supervises 3.3V regulated rail and provides MR-triggered reset for firmware recovery after IR receiver lockup. Use Value: Internal 50kΩ MR pullup removes external resistor, simplifying layout and improving reliability in high-humidity environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6401BS33-T | Same 3.30V threshold and active-high push-pull output, but rated for 2.20V–3.08V family voltage range (not 3.30V–4.63V) | Specified for lower-threshold systems; MAX6404BS33-T is validated for 3.30V–4.63V family with tighter tempco and hysteresis | Select MAX6404BS33-T for designs requiring guaranteed 3.30V threshold performance per Table 1 and UCSP-4 qualification under 3.3V–4.6V use cases |
| TPS3808G33DBVR | 3.3V threshold, active-high open-drain output; 1.6µA supply current; requires external pullup; 200ms fixed timeout | Lacks push-pull drive and ultra-low 500nA current; suited for higher-current systems where board space permits pullup resistor | Choose MAX6404BS33-T when push-pull output, sub-µA current, or UCSP-4 footprint are mandatory |
Compared with MAX6401BS33-T, the MAX6404BS33-T offers validated 3.30V threshold performance within the 3.30V–4.63V family specification, while versus TPS3808G33DBVR, it delivers 3.2× lower quiescent current and eliminates external pullup dependency - directly impacting battery lifetime and layout simplicity.
Availability
MAX6404BS33-T is available at Aetrix Electronics and suitable for portable medical devices, wearable electronics, industrial sensor nodes, and smart home remotes requiring stable component supply, long-lifecycle support, and ultra-low-power supervision.
Supply support for MAX6404BS33-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, and consumer applications.
The MAX6400–MAX6405 family was designed specifically for ultra-low-power microprocessor supervision in space-constrained, battery-operated systems - delivering precision voltage monitoring, manual reset capability, and chip-scale packaging without external components.
FAQ
What is the exact reset threshold voltage of the MAX6404BS33-T and how stable is it over temperature?
The MAX6404BS33-T has a factory-trimmed nominal reset threshold of 3.30V with ±2.5% accuracy over the full operating temperature range of –40°C to +85°C. Its temperature coefficient is 40ppm/°C, meaning the threshold drift is less than ±0.013V across the entire range. This stability is confirmed in the Electrical Characteristics table and Typical Operating Characteristics graphs of the official datasheet.
Does the MAX6404BS33-T require external components to operate?
No, the MAX6404BS33-T requires no external components. It integrates a precision bandgap reference, comparator, reset timer, and 50kΩ internal pullup resistor on the MR pin. The active-high push-pull RESET output eliminates the need for an external pullup resistor - enabling fully self-contained supervision in minimal PCB area.
What is the minimum VCC voltage at which the MAX6404BS33-T guarantees correct reset output behavior?
The MAX6404BS33-T guarantees correct reset output logic state down to VCC = 1.0V, as explicitly stated in the General Description and Absolute Maximum Ratings sections. This ensures fail-safe reset assertion even during deep brownout conditions well below its 3.30V trip point.
How does the manual reset (MR) function work on the MAX6404BS33-T?
The MR input on the MAX6404BS33-T is active-low with an internal 50kΩ pullup to VCC. Driving MR low asserts RESET high for the duration of the low signal plus the full 100ms reset timeout period after MR returns high. A 1µs minimum pulse width is required, and the device rejects MR glitches shorter than 100ns.
Is the MAX6404BS33-T compatible with 1.8V logic systems?
Yes - the MAX6404BS33-T operates with VCC as low as 1.2V and guarantees valid reset output down to 1.0V. Its MR input accepts logic-low thresholds of 0.2×VCC and logic-high thresholds of 0.7×VCC (for VTH ≤ 4.0V), making it interoperable with 1.8V I/O domains when powered from a compatible supply rail.
MAX6404BS33-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 4-WFBGA, CSPBGA
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.3V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-UCSP (1.05x1.05)
MAX6404BS33-T FAQ
1.How can I place an order for MAX6404BS33-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6404BS33-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 MAX6404BS33-T reliable?
The price and inventory of MAX6404BS33-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6404BS33-T is usually 5 days.
3.What payment methods are accepted for MAX6404BS33-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6404BS33-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6404BS33-T?
MAX6404BS33-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6404BS33-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 MAX6404BS33-T?
For technical support, including MAX6404BS33-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6404BS33-T requirements.
6.How does Aetrix verify that MAX6404BS33-T is sourced from the original manufacturer or authorized distributors?
All MAX6404BS33-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 MAX6404BS33-T meets industry standards.
7.What is the process for return or replacement of MAX6404BS33-T?
All MAX6404BS33-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6404BS33-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 MAX6404BS33-T part is unused and in its original packaging.
Return procedure for MAX6404BS33-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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