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Analog Devices Inc./Maxim Integrated MAX6402EBS22-T
- Part No.:
- MAX6402EBS22-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6402EBS22-T.pdf
- Description:
- IC SUPERVISOR UP SUP CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6402EBS22-T from Maxim Integrated is an ultra-low-power microprocessor supervisory circuit in a 4-bump UCSP package, designed to monitor VCC supply voltage and assert an active-low open-drain reset signal when voltage falls below 2.20V. It features ±2.5% threshold accuracy over –40°C to +85°C, 500nA typical supply current, factory-set 100ms minimum reset timeout, and guaranteed reset validity down to VCC = 1.0V. It is used in battery-powered portable electronics requiring reliable power-on reset and brownout protection.
For engineers reviewing the MAX6402EBS22-T datasheet, MAX6402EBS22-T pinout, MAX6402EBS22-T application, or MAX6402EBS22-T equivalent, key selection criteria include its 2.20V reset threshold, open-drain output configuration, UCSP-4 packaging, immunity to short VCC transients, and compatibility with bidirectional µP reset pins without external debouncing.
Technical Context
The MAX6402EBS22-T implements a precision bandgap reference comparator trimmed to a nominal 2.20V reset threshold with ±2.5% tolerance across temperature. Its internal timer ensures RESET remains asserted for ≥100ms after VCC rises above VTH, and it guarantees correct logic state down to VCC = 1.0V.
It features an active-low open-drain RESET output requiring an external pullup resistor, a manual reset (MR) input with internal 50kΩ pullup, and immunity to negative-going VCC transients up to 200µs at 100mV overdrive - enabling robust operation in noisy or dynamically loaded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH) | 2.20V nominal, ±2.5% over –40°C to +85°C - ensures accurate brownout detection for 2.5V–3.3V logic rails |
| Supply Current (ICC) | 500nA typical at +25°C - enables multi-year battery life in always-on portable devices |
| Reset Timeout (tRP) | 100ms minimum - satisfies µP power-up initialization timing requirements per JEDEC JESD22-A107 |
| Output Type | Active-low open-drain - supports wired-OR reset buses and bidirectional µP reset pins with single external pullup |
| VCC Operating Range | 1.2V to 5.5V - allows use with Li-ion, NiMH, and regulated 1.8V/2.5V/3.3V/5V supplies |
| MR Input Logic | Active-low with 50kΩ internal pullup - eliminates need for external biasing; accepts TTL/CMOS levels |
| Reset Propagation Delay (tRD) | 20µs max - ensures fast response to supply dips without false triggering on noise |
Pinout & Package
MAX6402EBS22-T is housed in a 2mm × 2mm, 4-bump ultra-thin chip-scale package (UCSP-4), optimized for space-constrained portable designs. The package uses solder bumps directly attached to PCB pads, requiring controlled reflow profile per Maxim's UCSP reliability guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for internal comparator and MR input; must be low-impedance connection to system ground plane |
| RESET | Open-drain reset output | Asserts low during VCC undervoltage or MR assertion; requires external pullup (typically 10–100kΩ) to host VCC or I/O rail |
| MR | Manual reset input | Active-low control; internally pulled up to VCC; momentary switch to GND initiates reset without debouncing circuitry |
| VCC | Supply and sense input | Power source and monitored voltage rail; also serves as reference for MR input thresholds and internal bandgap operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA typical - extends shelf life and runtime in coin-cell–powered IoT sensors and wearables |
| Factory-trimmed VTH | 2.20V ±2.5% - eliminates calibration overhead and external resistor dividers in production |
| Open-drain RESET | Compatible with bidirectional µP reset pins - enables shared reset bus across multiple ICs using one pullup |
| Guaranteed reset at 1.0V | VCC down to 1.0V maintains valid RESET state - ensures deterministic behavior during deep brownout or battery depletion |
| No external components | Self-contained supervision - reduces BOM count, PCB area, and qualification effort versus discrete RC+comparator solutions |
Applications
| Cell Phones | MP3 Players |
|---|---|
Use Scenario: Power sequencing during cold start and battery voltage sag during RF transmission bursts. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low open-drain RESET to hold baseband processor in reset until stable 2.8V rail is established. Use Value: Prevents boot corruption and illegal instruction execution caused by marginal VCC during GSM/EDGE transmit peaks. |
Use Scenario: Maintaining firmware integrity during alkaline battery discharge from 3.2V to 1.8V. IC Role / Device Role / Timing Role: Voltage monitor triggering reset when VCC drops below 2.20V, ensuring clean shutdown before NAND flash write corruption. Use Value: Eliminates need for software-based voltage polling, reducing CPU load and extending playback time via deterministic hardware reset. |
| Pagers | PDAs |
Use Scenario: Long-term storage with primary lithium battery exhibiting gradual self-discharge. IC Role / Device Role / Timing Role: Low-current supervisor maintaining reset assertion until first power-on, then releasing after 100ms timeout. Use Value: 500nA quiescent current enables >10-year shelf life while guaranteeing first-boot reliability without capacitor leakage concerns. |
Use Scenario: Hot-swap of CompactFlash cards causing transient VCC droop on 3.3V I/O rail. IC Role / Device Role / Timing Role: Brownout detector asserting RESET within 20µs of VCC falling 100mV below 2.20V threshold. Use Value: Prevents data loss during peripheral insertion by halting DMA transfers before supply instability affects memory controller timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6402EBS23-T | 2.32V nominal reset threshold (vs. 2.20V); otherwise identical electrical specs and UCSP-4 package | Suitable where system brownout margin requires higher trip point, e.g., 2.5V LDO with tighter dropout | Select when VCC nominal is ≥2.4V and design requires earlier reset assertion than 2.20V allows |
| TPS3808G12DBVR | 2.5V fixed threshold, push-pull active-low output, 1.5µA ICC, SOT-23-5 package | Requires PCB layout change (5-pin vs. 4-pin), lacks MR input, higher supply current limits battery life | Choose only if open-drain functionality is unnecessary and board space permits SOT-23 footprint |
Compared with MAX6402EBS22-T, the MAX6402EBS23-T offers a 120mV higher threshold for tighter brownout control without layout impact, while the TPS3808G12DBVR trades ultra-low ICC and UCSP size for push-pull drive strength and broader vendor availability - making it less suitable for space- and current-constrained portable designs.
Availability
MAX6402EBS22-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, cell phones, and MP3 players requiring stable component supply with guaranteed long-term sourcing and tape-and-reel delivery.
Supply support for MAX6402EBS22-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, communications, and consumer applications.
The MAX6400–MAX6405 family was designed specifically for ultra-low-power voltage monitoring in portable electronics, emphasizing minimal ICC, small UCSP packaging, and factory-trimmed thresholds to eliminate calibration in high-volume handheld devices.
FAQ
What is the exact reset threshold voltage of the MAX6402EBS22-T?
The MAX6402EBS22-T has a nominal reset threshold of 2.20V, with a guaranteed tolerance of ±2.5% over the full operating temperature range of –40°C to +85°C. At +25°C, the threshold is specified as 2.167V (min) to 2.233V (max), and this tight factory trimming eliminates the need for external resistor networks or calibration during production.
Does the MAX6402EBS22-T require an external pullup resistor on the RESET pin?
Yes, the MAX6402EBS22-T features an active-low open-drain RESET output, which requires an external pullup resistor to a valid logic rail (e.g., VCC or I/O supply). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements. Without this pullup, the RESET signal cannot transition high and the supervised microprocessor will remain held in reset.
Can the MAX6402EBS22-T operate reliably with a 1.2V supply?
Yes, the MAX6402EBS22-T is fully specified to operate with VCC as low as 1.2V (minimum) and guarantees correct RESET logic state down to VCC = 1.0V. This capability ensures deterministic reset behavior during deep brownout conditions common in single-cell lithium or alkaline battery systems approaching end-of-life.
How does the manual reset (MR) function interact with the power-on reset in the MAX6402EBS22-T?
In the MAX6402EBS22-T, asserting MR low forces RESET low immediately, regardless of VCC level. RESET remains low for the full reset timeout period (≥100ms) after MR returns high - independent of whether VCC is above or below the 2.20V threshold. This ensures consistent reset duration for both power-on and user-initiated resets.
Is the MAX6402EBS22-T pin-compatible with other members of the MAX6400–MAX6405 family?
Yes, all MAX6400–MAX6405 variants, including the MAX6402EBS22-T, share identical UCSP-4 pinout (GND, RESET, MR, VCC) and footprint. This allows direct substitution between threshold variants (e.g., MAX6402EBS23-T) or output types (e.g., MAX6400EBS22-T) without PCB changes - provided system-level timing and logic polarity requirements are verified.
MAX6402EBS22-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6402EBS22-T FAQ
1.How can I place an order for MAX6402EBS22-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6402EBS22-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 MAX6402EBS22-T reliable?
The price and inventory of MAX6402EBS22-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6402EBS22-T is usually 5 days.
3.What payment methods are accepted for MAX6402EBS22-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6402EBS22-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6402EBS22-T?
MAX6402EBS22-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6402EBS22-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 MAX6402EBS22-T?
For technical support, including MAX6402EBS22-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6402EBS22-T requirements.
6.How does Aetrix verify that MAX6402EBS22-T is sourced from the original manufacturer or authorized distributors?
All MAX6402EBS22-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 MAX6402EBS22-T meets industry standards.
7.What is the process for return or replacement of MAX6402EBS22-T?
All MAX6402EBS22-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6402EBS22-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 MAX6402EBS22-T part is unused and in its original packaging.
Return procedure for MAX6402EBS22-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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