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Analog Devices Inc./Maxim Integrated MAX6404BS44-T
- Part No.:
- MAX6404BS44-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 4-WFBGA, CSPBGA
- Datasheet:
-
MAX6404BS44-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 4UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6404BS44-T from Maxim Integrated is an ultra-low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-trimmed 4.38V ±2.5% threshold (–40°C to +85°C), 100ms minimum reset timeout, and 500nA typical supply current at 3.0V. It monitors VCC in portable battery-powered systems and asserts RESET high during brownout or power-up sequencing.
For engineers reviewing the MAX6404BS44-T datasheet, MAX6404BS44-T pinout, MAX6404BS44-T application, or MAX6404BS44-T equivalent, this device delivers precision voltage monitoring with guaranteed reset validity down to VCC = 1.0V, immunity to short VCC transients, and manual reset input support for system-level fault recovery and test access.
Technical Context
The MAX6404BS44-T implements a precision bandgap reference comparator with factory-trimmed 4.38V reset threshold and ±2.5% accuracy over –40°C to +85°C. Its internal timer enforces a minimum 100ms reset timeout after VCC rises above VTH, and it guarantees correct logic state for VCC as low as 1.0V.
It features an active-high push-pull RESET output capable of sourcing ≥500µA at 0.8×VCC (VCC ≥ 2.1V), a manual reset (MR) input with 50kΩ internal pullup, and immunity to negative-going VCC transients ≤200ns at 100mV overdrive - confirmed by Typical Operating Characteristics graphs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V nominal, ±2.5% over –40°C to +85°C - ensures reliable brownout detection across industrial temperature range |
| Supply Current | 500nA typical at 3.0V - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout | 100ms minimum - meets µP power-up initialization timing requirements per JEDEC JESD79 |
| Output Type | Active-high push-pull - directly drives CMOS/TTL inputs without external pullup |
| VCC Range | 1.2V to 5.5V (–40°C to +85°C) - supports single-cell Li-ion, 3.3V, and 5V rail monitoring |
| MR Input Logic | Active-low with 50kΩ internal pullup - simplifies manual reset implementation using momentary switch to GND |
| Reset Propagation Delay | 20µs max from VCC crossing VTH - ensures fast response to supply dips without false triggering |
Pinout & Package
MAX6404BS44-T is housed in a 4-bump UCSP (Ultra-Compact Chip-Scale Package), 2mm × 2mm footprint, 0.5mm bump pitch, lead-free, RoHS-compliant. Package meets JEDEC J-STD-020 moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for internal bandgap reference and comparator; must be low-impedance connection to system ground plane |
| RESET | Active-high push-pull output | Drives µP reset pin high during undervoltage; sinks ≤0.4V at 3.2mA (VCC ≥ 3.2V), sources ≥0.8×VCC at 500µA |
| MR | Manual reset input | Active-low signal; internal 50kΩ pullup to VCC allows NC or direct VCC tie; accepts TTL/CMOS logic levels |
| VCC | Supply and monitor input | Power source and monitored rail; device operates and asserts reset correctly down to 1.2V (–40°C to +85°C) |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.38V threshold | Eliminates external resistor divider and calibration, reducing BOM count and layout area by >3 components |
| 500nA supply current | Extends battery life in always-on monitoring applications - e.g., 10-year runtime on CR2032 (225mAh) with 1s wake interval |
| Guaranteed reset validity to 1.0V | Ensures deterministic µP reset assertion even during deep brownout or Li-ion discharge below 2.5V |
| Immunity to 200ns VCC glitches | Prevents spurious resets in noisy environments (e.g., motor-driven handhelds or RF-coupled PCBs) |
| No external components required | Reduces design validation effort and eliminates drift-prone passive networks in critical reset paths |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Continuous glucose monitor powered by single CR2032 cell, operating 24/7 with periodic sensor readout. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-high RESET to ARM Cortex-M0+ during battery discharge below 4.38V. Use Value: Prevents firmware corruption by guaranteeing µP reset before supply collapse, with <500nA quiescent draw preserving battery life. |
Use Scenario: Rugged barcode scanner with motorized trigger, exposed to ESD and supply noise from motor commutation. IC Role / Device Role / Timing Role: Brownout detector rejecting <200ns VCC transients induced by motor switching, holding RESET high only during sustained undervoltage. Use Value: Eliminates false resets during normal operation while ensuring fail-safe shutdown when battery drops below 4.38V. |
| Smart Wearable Sensors | Asset Tracking Beacons |
Use Scenario: BLE-enabled fitness tracker using rechargeable LiPo (3.0–4.2V), requiring reliable boot after charge termination. IC Role / Device Role / Timing Role: Power-on reset generator with 100ms timeout, synchronized to LiPo charger's CV phase completion. Use Value: Ensures full µP initialization completes before BLE stack starts, avoiding radio initialization failures. |
Use Scenario: GPS asset tracker in cold-chain logistics, operating from –25°C to +70°C with primary alkaline cells. IC Role / Device Role / Timing Role: Low-temperature-stable supervisor verifying 4.38V threshold across –40°C to +85°C with ±2.5% accuracy. Use Value: Maintains consistent reset behavior despite alkaline cell voltage sag at low temperature, preventing premature shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6404BS43-T | 4.30V nominal threshold (±2.5%), otherwise identical electrical specs and package | Suitable where system brownout margin requires earlier reset assertion before 4.38V | Select when VCC tolerance budget demands reset at 4.30V rather than 4.38V - same pinout, no layout change |
| TPS3808G33DBVR | 3.3V fixed threshold, 1.6µA supply current, SOT-23-5 package, active-low open-drain output | Requires external pullup and level-shifting for active-high µP interfaces; higher quiescent current reduces battery life | Choose only if 3.3V threshold matches system rail and board space permits SOT-23; not drop-in compatible due to pin count and logic polarity |
Compared with MAX6404BS44-T, the MAX6404BS43-T offers identical form, fit, and function except for a 80mV lower threshold - ideal for tighter VCC margins - while the TPS3808G33DBVR differs in threshold, output logic, supply current, and package, requiring schematic and layout revision.
Availability
MAX6404BS44-T is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, smart wearables, asset tracking beacons, and battery-backed real-time clocks requiring stable component supply and long-term manufacturability.
Supply support for MAX6404BS44-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 power, sensing, and interface applications, with focus on high-reliability, low-power solutions.
The MAX6400–MAX6405 family was engineered specifically for ultra-low-power microprocessor supervision in space-constrained, battery-operated systems - emphasizing minimal quiescent current, chip-scale packaging, and factory-trimmed accuracy without external components.
FAQ
What is the exact reset threshold voltage of MAX6404BS44-T, and how does it vary with temperature?
The MAX6404BS44-T has a nominal reset threshold of 4.38V, with ±2.5% accuracy guaranteed over the full industrial temperature range of –40°C to +85°C. At +25°C, the threshold is 4.38V ±1.5%, and its temperature coefficient is 40ppm/°C - meaning drift is less than 1.75mV over a 100°C span. This ensures predictable brownout behavior in battery-powered equipment across environmental conditions.
Does MAX6404BS44-T require external components to operate?
No, MAX6404BS44-T requires no external components. Its precision bandgap reference, comparator, and timer are fully integrated. The manual reset (MR) input includes a 50kΩ internal pullup, and the active-high push-pull RESET output drives µP inputs directly. This eliminates resistors, capacitors, or trimming networks traditionally needed in discrete reset circuits.
Can MAX6404BS44-T operate reliably at VCC = 1.2V?
Yes, MAX6404BS44-T is fully specified to operate and assert RESET correctly down to VCC = 1.2V over –40°C to +85°C, and guaranteed functional to VCC = 1.0V. At 1.2V, the device maintains valid logic states, detects threshold crossing, and sustains the 100ms reset timeout - critical for graceful shutdown in deeply discharged Li-ion or alkaline systems.
What is the maximum transient duration that MAX6404BS44-T can ignore on the VCC line?
MAX6404BS44-T ignores VCC transients up to 200ns in duration when the overdrive (VTH – VCC) is 100mV, as shown in Figure MAX6400-05 toc04. For larger overdrives (e.g., 200mV), the maximum tolerable pulse width decreases to ~100ns. This immunity prevents false resets caused by switching noise or ESD-induced supply glitches.
Is the UCSP package of MAX6404BS44-T compatible with standard reflow profiles?
Yes, the 4-bump UCSP package of MAX6404BS44-T is qualified for Pb-free reflow per JEDEC J-STD-020, with peak reflow temperature up to +235°C. It is rated MSL-1 (unlimited floor life) and designed for standard SMT assembly - though board layout must follow Maxim's UCSP guidelines for solder joint reliability, including pad geometry and PCB material selection.
MAX6404BS44-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:
- 4.38V
- 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)
MAX6404BS44-T FAQ
1.How can I place an order for MAX6404BS44-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6404BS44-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 MAX6404BS44-T reliable?
The price and inventory of MAX6404BS44-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6404BS44-T is usually 5 days.
3.What payment methods are accepted for MAX6404BS44-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6404BS44-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6404BS44-T?
MAX6404BS44-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6404BS44-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 MAX6404BS44-T?
For technical support, including MAX6404BS44-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6404BS44-T requirements.
6.How does Aetrix verify that MAX6404BS44-T is sourced from the original manufacturer or authorized distributors?
All MAX6404BS44-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 MAX6404BS44-T meets industry standards.
7.What is the process for return or replacement of MAX6404BS44-T?
All MAX6404BS44-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6404BS44-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 MAX6404BS44-T part is unused and in its original packaging.
Return procedure for MAX6404BS44-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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