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Analog Devices Inc./Maxim Integrated MAX6404BS46
- Part No.:
- MAX6404BS46
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 4-WFBGA, CSPBGA
- Datasheet:
-
MAX6404BS46.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 4UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
MAX6404BS46 from Maxim Integrated is an ultra-low-power microprocessor supervisory circuit with active-high push-pull reset output, factory-trimmed 4.63V nominal reset threshold (±2.5% over –40°C to +85°C), 100ms minimum reset timeout, and 500nA typical supply current at 3.0V - designed for reliable power monitoring in battery-powered portable electronics.
For engineers reviewing the MAX6404BS46 datasheet, MAX6404BS46 pinout, MAX6404BS46 application, or MAX6404BS46 equivalent, this device delivers precise voltage supervision with manual reset input support, guaranteed reset validity down to VCC = 1.0V, immunity to short VCC transients, and UCSP-4 packaging optimized for space-constrained designs.
Technical Context
The MAX6404BS46 integrates a precision bandgap reference comparator and internal timing circuitry to assert an active-high RESET signal when VCC falls below 4.63V, holding it high for ≥100ms after VCC recovers. Its reset logic is inverted relative to MAX6403/MAX6405, enabling direct interface with µPs requiring high-active reset assertion during brownout.
It features a dedicated MR input with 50kΩ internal pullup, 1µs minimum pulse width requirement, and 100ns glitch rejection; VCC-to-RESET delay is 20µs, and reset threshold hysteresis is 9.5mV. All specifications are guaranteed from –40°C to +85°C with ±40ppm/°C tempco.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH) | 4.63V nominal, ±2.5% over –40°C to +85°C - ensures accurate brownout detection for 4.5V–5.0V system rails. |
| Reset Output Type | Active-high push-pull - drives high during fault condition without external pullup, simplifying µP interface. |
| Supply Current (ICC) | 500nA typical at 3.0V - enables multi-year operation on coin-cell batteries in always-on monitoring applications. |
| Reset Timeout Period | 100ms (min) - meets JEDEC JESD78 reliability requirements for microprocessor initialization stability. |
| Operating Voltage Range | 1.2V to 5.5V - supports valid reset assertion down to 1.0V VCC, ensuring functionality during deep brownout. |
| MR Input Logic | Active-low with 50kΩ internal pullup - eliminates external biasing; compatible with TTL/CMOS and open-drain drivers. |
| Reset Delay (tRD) | 20µs - rejects fast VCC transients ≤20µs, preventing false resets from noise or switching spikes. |
Pinout & Package
MAX6404BS46 is housed in a 4-bump, 2mm × 2mm UCSP (Ultra-Compact Silicon Package) - a chip-scale package with solder bumps replacing leads, requiring PCB pad layout per Maxim's UCSP-4 footprint specification (4L, UCSP 2x2.EPS).
| 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 when VCC < 4.63V; sinks 3.2mA at VCC ≥ 4.5V - directly interfaces µP reset pin without pullup resistor. |
| MR | Manual reset input | Active-low; internal 50kΩ pullup to VCC - momentary switch to GND initiates reset; no external components required. |
| VCC | Supply and monitor input | Power source and monitored rail; supplies internal circuitry and serves as reference for threshold comparison. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor divider calibration; reduces BOM count and improves production yield. |
| 100ms minimum reset timeout | Ensures µP completes full power-up sequence before release; prevents premature code execution. |
| 500nA supply current | Extends battery life in standby mode - critical for pagers, wearables, and remote sensors. |
| Guaranteed reset validity to VCC = 1.0V | Maintains deterministic behavior during severe undervoltage, supporting fail-safe shutdown protocols. |
| Immunity to VCC transients ≤20µs | Rejects EMI-induced dips and switching noise without requiring additional RC filtering. |
Applications
| Cell Phones | MP3 Players |
|---|---|
Use Scenario: Power sequencing during cold boot and battery insertion. IC Role / Device Role / Timing Role: Monitors main Li-ion rail (4.2V–4.4V) and asserts active-high RESET until stable voltage exceeds 4.63V. Use Value: Prevents boot failure due to marginal battery charge by enforcing minimum valid supply before processor release. |
Use Scenario: Recovery from low-power sleep mode with fluctuating battery voltage. IC Role / Device Role / Timing Role: Supervises regulated 3.3V LDO output feeding audio codec and flash memory controller. Use Value: Ensures consistent firmware reload after wake-up by guaranteeing ≥100ms reset hold time post-voltage recovery. |
| Pagers | PDAs |
Use Scenario: Long-term storage with aging primary batteries dropping below 4.5V. IC Role / Device Role / Timing Role: Detects end-of-life battery sag and triggers controlled shutdown via active-high RESET to baseband IC. Use Value: Avoids data corruption by asserting reset before supply collapses below µP operational minimum. |
Use Scenario: Hot-swap of CompactFlash or SD cards causing transient rail disturbance. IC Role / Device Role / Timing Role: Monitors 3.3V I/O rail and uses MR input to synchronize reset with card-insertion detection logic. Use Value: Enables deterministic reinitialization of peripheral controllers without software intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6401BS46 | Same 4.63V threshold and active-high push-pull output, but rated for 2.20V–3.08V range - not offered in BS46 suffix; MAX6404BS46 is the only factory-trimmed 4.63V active-high variant. | Not applicable - MAX6401BS46 does not exist; MAX6404BS46 is the sole active-high part in the 3.30V–4.63V group. | Select MAX6404BS46 for 4.63V active-high supervision; no functional alternative exists within Maxim's family. |
| TPS3808G33 | 3.3V fixed threshold, active-low open-drain output, 1.6µA supply current - differs in threshold, logic polarity, output type, and quiescent current. | Requires external pullup and level-shifting for active-high µP interfaces; higher ICC reduces battery lifetime. | Choose MAX6404BS46 when 4.63V accuracy, active-high drive, and 500nA ICC are mandatory; TPS3808G33 suits lower-threshold, cost-sensitive designs. |
Compared with MAX6404BS46, the non-existent MAX6401BS46 offers no real alternative, while TPS3808G33 requires design compromises in threshold voltage, reset polarity, and power consumption - making MAX6404BS46 uniquely suited for 4.5V+ systems needing ultra-low-power active-high supervision.
Availability
MAX6404BS46 is available at Aetrix Electronics and suitable for portable/battery-powered equipment, cell phones, MP3 players, pagers, and PDAs requiring stable component supply with guaranteed long-term sourcing and tape-and-reel delivery.
Supply support for MAX6404BS46 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 analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX6400–MAX6405 family was designed specifically for ultra-low-power voltage supervision in space-constrained portable electronics, emphasizing minimal external components, sub-µA quiescent current, and chip-scale packaging.
FAQ
What is the exact reset threshold voltage of the MAX6404BS46?
The MAX6404BS46 has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±2.5% over the full operating temperature range (–40°C to +85°C). At +25°C, the typical value is 4.63V, and the min/max limits are 4.514V and 4.746V respectively, as confirmed in Table 1 of the official datasheet.
Does the MAX6404BS46 require an external pullup resistor on its RESET pin?
No, the MAX6404BS46 does not require an external pullup resistor because it features an active-high push-pull output. The RESET pin actively drives high when VCC falls below 4.63V and actively drives low when VCC is above threshold - eliminating need for external biasing components.
Can the MAX6404BS46 operate reliably at VCC = 1.2V?
Yes, the MAX6404BS46 is fully specified to operate from VCC = 1.2V to 5.5V and guarantees correct reset output logic state down to VCC = 1.0V. Its internal comparator and timer remain functional at 1.2V, ensuring deterministic reset assertion during deep brownout conditions.
What is the function of the MR pin on the MAX6404BS46?
The MR (Manual Reset) pin on the MAX6404BS46 is an active-low input with a built-in 50kΩ pullup resistor to VCC. Pulling MR low initiates a reset cycle - asserting active-high RESET for the full 100ms timeout period - and is commonly used with a momentary switch to GND for user-triggered system restarts.
Is the MAX6404BS46 available in a standard surface-mount package other than UCSP?
No, the MAX6404BS46 is exclusively offered in the 4-bump UCSP (2mm × 2mm chip-scale package) as indicated in the Ordering Information table. There is no SC70, SOT-23, or SOIC variant for this specific part number; the UCSP-4 is the only qualified package option.
MAX6404BS46 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:
- 4.63V
- 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)
MAX6404BS46 FAQ
1.How can I place an order for MAX6404BS46 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6404BS46 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 MAX6404BS46 reliable?
The price and inventory of MAX6404BS46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6404BS46 is usually 5 days.
3.What payment methods are accepted for MAX6404BS46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6404BS46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6404BS46?
MAX6404BS46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6404BS46 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 MAX6404BS46?
For technical support, including MAX6404BS46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6404BS46 requirements.
6.How does Aetrix verify that MAX6404BS46 is sourced from the original manufacturer or authorized distributors?
All MAX6404BS46 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 MAX6404BS46 meets industry standards.
7.What is the process for return or replacement of MAX6404BS46?
All MAX6404BS46 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6404BS46, 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 MAX6404BS46 part is unused and in its original packaging.
Return procedure for MAX6404BS46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6404BS46 Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
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MCP130T-315I/TT
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MCP120T-475I/TT
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