My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6403BS46-T
- Part No.:
- MAX6403BS46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 4-WFBGA, CSPBGA
- Datasheet:
-
MAX6403BS46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 4UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6403BS46-T from Maxim Integrated is an ultra-low-power microprocessor supervisory circuit designed to monitor 4.63V system supply rails in portable and battery-powered electronics. It features a factory-trimmed 4.63V reset threshold (±2.5% over -40°C to +85°C), active-low push-pull RESET output, 100ms minimum reset timeout, manual reset input (MR), and guaranteed reset validity down to VCC = 1.0V. It operates across -40°C to +85°C in UCSP-4 packaging.
For engineers reviewing the MAX6403BS46-T datasheet, MAX6403BS46-T pinout, MAX6403BS46-T application, or MAX6403BS46-T equivalent, key selection criteria include its precise 4.63V trip point, 500nA typical supply current, immunity to short VCC transients, and compatibility with systems requiring guaranteed reset assertion below 1.2V supply.
Technical Context
The MAX6403BS46-T implements a precision bandgap reference comparator with factory-trimmed 4.63V threshold and 9.5mV hysteresis, ensuring stable reset assertion during brownout conditions. Its internal timer enforces a minimum 100ms reset timeout after VCC rises above threshold, and it guarantees correct logic state for VCC as low as 1.0V.
It supports manual reset via an MR input with internal 50kΩ pullup, 1µs minimum pulse width, and 100ns glitch rejection. The active-low push-pull RESET output delivers VOL ≤ 0.4V at ISINK = 100µA (VCC ≥ 1.2V) and VOH ≥ 0.8 × VCC at ISOURCE = 800µA (VCC = 4.5V, VTH ≤ 4.38V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VTH) | 4.63V nominal, ±2.5% over -40°C to +85°C - ensures reliable power-fail detection for 4.5–5.0V systems. |
| Supply Current (ICC) | 500nA typical at +25°C - enables multi-year battery life in always-on monitoring applications. |
| Reset Timeout (tRP) | 100ms (min), 185ms (typ), 280ms (max) - provides sufficient hold time for µP initialization sequences. |
| VCC Operating Range | 1.2V to 5.5V (–40°C to +85°C) - supports operation during deep brownout and full rail conditions. |
| RESET Output Type | Active-low push-pull - eliminates need for external pullup resistor and drives directly into µP reset pin. |
| MR Input Logic | Active-low with 50kΩ internal pullup - simplifies manual reset implementation using momentary switch to GND. |
| Reset Propagation Delay (tRD) | 20µs max - ensures fast response to supply dips without false triggering on noise. |
Pinout & Package
MAX6403BS46-T is housed in a 4-bump, 2×2 mm chip-scale package (UCSP-4), optimized for ultra-compact portable designs. The package has no leads and requires controlled reflow assembly per Maxim's UCSP reliability guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | GND | Ground reference for all internal circuitry and reset comparator. |
| B1 | RESET | Active-low push-pull output; asserts logic low when VCC < 4.63V and remains low for ≥100ms after VCC recovery. |
| B2 | MR | Active-low manual reset input; internally pulled up to VCC (50kΩ); initiates reset when pulled to GND. |
| A2 | VCC | Primary supply input and monitored voltage rail; powers device and serves as reset threshold reference source. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 500nA typical - extends battery life in coin-cell–powered devices like pagers and wearables. |
| Precision VTH trim | 4.63V ±2.5% over full temperature range - eliminates calibration overhead in production test. |
| Guaranteed reset at low VCC | Valid RESET assertion down to VCC = 1.0V - ensures robust behavior during deep brownout or cold-start. |
| No external components | Self-contained supervisor - reduces BOM count and PCB area vs. discrete RC-reset solutions. |
| Transient immunity | Rejects VCC glitches < 100ns - prevents spurious resets in noisy power environments. |
Applications
| Cell Phones | MP3 Players |
|---|---|
|
Use Scenario: Monitoring Li-ion battery voltage during discharge to prevent data corruption before shutdown. IC Role / Device Role / Timing Role: Microprocessor supervisory circuit asserting active-low reset when battery drops below 4.63V. Use Value: Prevents flash write errors and processor lockup by guaranteeing clean reset initiation at precisely defined undervoltage condition. |
Use Scenario: Ensuring safe boot sequence after cold start or power interruption in flash-based audio players. IC Role / Device Role / Timing Role: Power-on reset generator with 100ms timeout, synchronized to VCC ramp-up. Use Value: Eliminates need for external RC timing network while delivering deterministic reset hold time for NAND controller initialization. |
| Pagers | PDAs |
|
Use Scenario: Maintaining reliable reset functionality in ultra-low-power paging receivers operating from button cells. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor enabling >5-year shelf life with minimal self-discharge impact. Use Value: 500nA supply current minimizes battery drain during standby, extending operational lifetime without compromising reset accuracy. |
Use Scenario: Coordinating reset timing between application processor, PMIC, and peripheral controllers during hot-swap battery insertion. IC Role / Device Role / Timing Role: Manual reset interface (MR) with internal pullup, allowing user-triggered reboot without external logic. Use Value: Simplifies mechanical design by enabling direct switch-to-GND connection, eliminating debounce circuitry and reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6403BS45-T | 4.50V nominal reset threshold (vs. 4.63V), same UCSP-4 package and push-pull output. | Suitable for 4.3–4.7V systems where tighter margin below 4.63V is required. | Select when system brownout threshold must be lowered by ~130mV while retaining identical timing and drive strength. |
| TPS3808G33DBVR | 3.3V threshold, SOT-23-5 package, 1.6µA ICC (vs. 500nA), 200ms timeout, open-drain output. | Requires external pullup; higher supply current limits use in multi-year battery applications. | Choose only if board layout accommodates SOT-23 and system tolerates higher quiescent draw and different threshold. |
Compared with MAX6403BS46-T, MAX6403BS45-T offers a lower trip point within the same family and footprint, while TPS3808G33DBVR trades ultra-low ICC and chip-scale size for industry-standard packaging and broader vendor availability-making it less suitable for space-constrained, long-life portable designs.
Availability
MAX6403BS46-T is available at Aetrix Electronics and suitable for portable equipment, battery-powered instrumentation, and handheld communication devices requiring stable component supply and long-term lifecycle support.
Supply support for MAX6403BS46-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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on energy efficiency and integration.
The MAX6400–MAX6405 family was engineered specifically for ultra-low-power microprocessor supervision in space-constrained portable electronics, prioritizing sub-µA quiescent current and chip-scale packaging without sacrificing threshold accuracy or reset timing integrity.
FAQ
What is the exact reset threshold voltage of the MAX6403BS46-T?
The MAX6403BS46-T has a factory-trimmed nominal reset threshold of 4.63V, with tolerance of ±2.5% over the full operating temperature range of –40°C to +85°C. At +25°C, the typical value is 4.63V, and the min/max spread is 4.514V to 4.746V per Table 1 in the datasheet. This precise threshold ensures reliable detection of undervoltage conditions in 4.5–5.0V systems without external calibration.
Does the MAX6403BS46-T require external components to function?
No, the MAX6403BS46-T requires no external components for basic operation. It integrates a precision bandgap reference, comparator, reset timer, and internal pullup on the MR pin. Unlike RC-based reset circuits, the MAX6403BS46-T delivers guaranteed 100ms reset timeout, accurate 4.63V threshold, and 500nA supply current without resistors, capacitors, or trimming adjustments - reducing BOM cost and PCB area.
Can the MAX6403BS46-T operate reliably below 1.2V supply?
Yes, the MAX6403BS46-T guarantees correct RESET output logic state down to VCC = 1.0V, as confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables. While the recommended operating range starts at 1.2V, the device maintains functional reset assertion capability even at 1.0V - critical for detecting deep brownout events in battery-powered systems approaching end-of-life voltage.
What is the function of the MR pin on the MAX6403BS46-T?
The MR (Manual Reset) pin on the MAX6403BS46-T is an active-low input with an internal 50kΩ pullup resistor to VCC. Pulling MR to GND initiates a reset pulse that holds RESET low for the full 100ms timeout period, even after MR returns high. This allows simple implementation of user-triggered resets using a momentary switch, with no external pullup or debouncing circuitry required under typical conditions.
Is the MAX6403BS46-T pin-compatible with other devices in the MAX6400–MAX6405 family?
Yes, all MAX6400–MAX6405 variants, including the MAX6403BS46-T, share identical UCSP-4 pinout (GND, RESET, MR, VCC) and footprint. This allows drop-in replacement across threshold voltages (e.g., 4.50V, 4.63V) and output types (push-pull vs. open-drain) without PCB redesign - provided the system's reset polarity and drive requirements match the selected variant.
MAX6403BS46-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:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- 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)
MAX6403BS46-T FAQ
1.How can I place an order for MAX6403BS46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6403BS46-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 MAX6403BS46-T reliable?
The price and inventory of MAX6403BS46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6403BS46-T is usually 5 days.
3.What payment methods are accepted for MAX6403BS46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6403BS46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6403BS46-T?
MAX6403BS46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6403BS46-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 MAX6403BS46-T?
For technical support, including MAX6403BS46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6403BS46-T requirements.
6.How does Aetrix verify that MAX6403BS46-T is sourced from the original manufacturer or authorized distributors?
All MAX6403BS46-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 MAX6403BS46-T meets industry standards.
7.What is the process for return or replacement of MAX6403BS46-T?
All MAX6403BS46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6403BS46-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 MAX6403BS46-T part is unused and in its original packaging.
Return procedure for MAX6403BS46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6403BS46-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…
