My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6424UK29+T
- Part No.:
- MAX6424UK29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6424UK29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,400
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6424UK29+T from Analog Devices is a low-power microprocessor supervisor IC with active-low push-pull reset output, 2.925V nominal reset threshold (±2.5% over temperature), capacitor-adjustable reset timeout (275µs to 5.75ms), and guaranteed operation down to VCC = 1V. It monitors supply voltages from 1.6V to 5.5V and is used in battery-powered controllers to prevent code-execution errors during brownout conditions.
For engineers reviewing the MAX6424UK29+T datasheet, MAX6424UK29+T pinout, MAX6424UK29+T application, or MAX6424UK29+T equivalent, key selection criteria include reset threshold accuracy, quiescent current (1.6µA typ at 2V), SRT capacitor-based timeout tuning, push-pull drive capability (3.2mA sink at 4.5V), and SOT23-5 package compatibility with NCP300–NCP303 and MC33464 series.
Technical Context
The MAX6424UK29+T implements a precision voltage detector with laser-trimmed internal resistors to set its 2.925V reset threshold, supported by 33mV hysteresis for noise immunity. Its reset assertion logic responds to VCC falling below threshold within 80µs, and deassertion is delayed by an externally adjustable timeout determined by a 240nA ramp current charging the SRT capacitor to 0.65V.
This device operates across –40°C to +125°C with supply current scaling from 1.6µA (at VCC ≤ 2.0V) to 4.2µA (at VCC ≤ 5.0V). The push-pull RESET output guarantees VOL ≤ 0.4V at 3.2mA sink and VOH ≥ 0.8×VCC at 800µA source, ensuring robust interface to µP reset inputs without external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.925V ±2.5% over –40°C to +125°C - ensures reliable brownout detection across automotive/industrial temperature ranges |
| Quiescent Current | 1.6µA typical at VCC ≤ 2.0V - enables multi-year battery life in portable medical or sensor nodes |
| Reset Timeout Range | 275µs to 5.75ms (CSRT = 0 to 1500pF) - supports µP power-up sequencing from fast microcontrollers to slow FPGA configuration |
| RESET Output Drive | 3.2mA sink at VCC ≥ 4.5V, VOL ≤ 0.4V - directly drives standard CMOS reset inputs without level-shifting |
| Supply Voltage Range | 1.0V to 5.5V - valid reset assertion down to 1V allows monitoring of deeply discharged Li-ion or supercapacitor-backed rails |
| VCC to RESET Delay | 80µs maximum at 1mV/µs VCC fall rate - fast response prevents spurious execution during rapid supply collapse |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial embedded controller applications |
Pinout & Package
MAX6424UK29+T is housed in a 5-pin SOT23-5 package (package code U5+2, outline 21-0057), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and exposed pad for thermal performance. Pin 1 is marked via dot; pin order follows standard SOT23 orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Supply voltage input and reset threshold monitor | Primary power rail connection; internal voltage divider references this node to generate 2.925V threshold |
| 2 - GND | Ground reference | Return path for internal biasing and SRT ramp current; must be low-impedance for accurate timeout timing |
| 3 - SRT | Set Reset Timeout input | Connects to external capacitor (CSRT); 240nA constant current charges it to 0.65V to define timeout period |
| 4 - N.C. | No internal connection | Unbonded die pad; may be left floating or tied to GND per layout best practices - no electrical function |
| 5 - RESET | Active-low push-pull reset output | Drives µP reset pin low during fault; actively pulls high after timeout - eliminates need for external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise µP reset hold time tuning (275µs–5.75ms) using a single low-leakage ceramic capacitor on SRT |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior even as battery voltage collapses - critical for energy-harvesting and backup systems |
| Immunity to short VCC transients | Rejects glitches ≤50µs duration when VCC dips 100mV below threshold - prevents false resets in noisy power environments |
| Low quiescent current (1.6µA typ) | Minimizes standby power draw in always-on battery-powered devices such as portable diagnostics and remote sensors |
| Laser-trimmed reset threshold accuracy | ±1.5% at +25°C and ±2.5% over full temperature range - eliminates need for external calibration in production test |
Applications
| Battery-Powered Medical Monitors | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Portable ECG or glucose meter operating from single-cell Li-ion with undervoltage protection. IC Role / Device Role / Timing Role: Supervises main 3.3V rail; asserts RESET if battery drops below 2.925V during discharge or cold start. Use Value: Prevents corrupted memory writes or erratic MCU behavior during low-battery shutdown - meets IEC 60601-1 safety requirements. |
Use Scenario: Under-dash BCM powered from vehicle battery subject to load-dump and cranking transients. IC Role / Device Role / Timing Role: Monitors 5V LDO output; holds microcontroller in reset during cranking-induced brownouts (<6V). Use Value: Ensures deterministic firmware restart after engine start; 80µs response avoids race conditions in CAN initialization. |
| Industrial IoT Edge Sensors | Set-Top Box Power Management |
|
Use Scenario: LoRaWAN node powered by primary alkaline cells with long shelf life and intermittent wake-up cycles. IC Role / Device Role / Timing Role: Provides 4.375ms reset timeout (CSRT = 1500pF) to allow full MCU clock stabilization before boot. Use Value: 1.6µA quiescent current extends 10-year battery life; push-pull output eliminates leakage-sensitive pull-up resistors. |
Use Scenario: Consumer STB with dual-rail power (12V/3.3V) and HDMI hot-plug detection requiring clean power sequencing. IC Role / Device Role / Timing Role: Supervises 3.3V core rail; generates reset pulse only after stable 3.3V is confirmed and held for >3ms. Use Value: Prevents HDMI handshake failures and firmware hangs caused by premature CPU release during power-up ramp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP302LSN29T1G | 2.9V fixed threshold, 200ms factory-fixed timeout, 0.8µA IQ, SOT23-5 | Lacks adjustable timeout; suitable only where fixed delay suffices | Choose for cost-sensitive designs where 200ms reset hold is acceptable and layout space is constrained |
| MC33464D-29SEFR2 | 2.9V threshold, 200ms timeout, 1.2µA IQ, SOT23-5, open-drain output | Requires external pull-up; not push-pull - adds BOM item and leakage sensitivity | Prefer when interfacing to mixed-voltage systems needing level translation, but avoid if minimizing component count is critical |
Compared with MAX6424UK29+T, NCP302LSN29T1G offers lower quiescent current but forfeits timeout flexibility, while MC33464D-29SEFR2 trades push-pull convenience for open-drain versatility - MAX6424UK29+T uniquely balances adjustability, drive strength, and ultra-low power in one SOT23-5 package.
Availability
MAX6424UK29+T is available at Aetrix Electronics and suitable for battery-powered medical monitors, automotive body control modules, and industrial IoT edge sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6424UK29+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
Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The MAX6424UK29+T belongs to the MAX6340/MAX6421–MAX6426 family of low-power μP supervisors, designed specifically for reliable power-on reset and brownout protection in space-constrained, battery-critical, and automotive-grade applications.
FAQ
What is the exact reset threshold voltage of MAX6424UK29+T and how does it vary with temperature?
The MAX6424UK29+T has a nominal reset threshold of 2.925V, with ±1.5% accuracy at +25°C and ±2.5% over the full –40°C to +125°C operating range. This specification is laser-trimmed at wafer sort and validated per Analog Devices' production test flow. The device maintains guaranteed reset assertion down to VCC = 1V, making MAX6424UK29+T suitable for applications where supply rails decay slowly under load.
How do I calculate the external capacitor value needed for a specific reset timeout with MAX6424UK29+T?
Use the formula CSRT = (tRP − 275µs) / 2.735 × 10⁶, where tRP is the desired timeout in seconds and CSRT is in farads. For example, a 4.375ms timeout requires CSRT = (0.004375 − 0.000275) / 2.735 × 10⁶ = 1500pF. MAX6424UK29+T requires low-leakage ceramic capacitors (≤10nA) - X7R or C0G types are recommended to maintain timing accuracy across temperature.
Does MAX6424UK29+T require an external pull-up resistor on the RESET pin?
No. MAX6424UK29+T features an active-low push-pull RESET output, meaning it actively drives both high and low states. Unlike open-drain supervisors, MAX6424UK29+T does not require an external pull-up resistor - simplifying BOM and eliminating leakage-related timing uncertainty. This makes MAX6424UK29+T ideal for low-power designs where every nanoamp counts.
Can MAX6424UK29+T be used in automotive applications, and is it AEC-Q100 qualified?
The MAX6424UK29+T is rated for –40°C to +125°C operation and shares the same process and qualification baseline as AEC-Q100 qualified variants in the family (e.g., MAX6340UK31/V+T). While MAX6424UK29+T itself is not individually listed in the AEC-Q100 certificate, its design, BiCMOS process, and package meet automotive reliability requirements. For formal qualification, consult Analog Devices' automotive product roadmap or contact Aetrix for certified alternatives.
What is the maximum VCC slew rate that MAX6424UK29+T can tolerate without issuing a false reset?
MAX6424UK29+T is immune to VCC transients ≤50µs in duration when the dip magnitude is ≤100mV below the 2.925V threshold - verified per the "Maximum Transient Duration vs. Reset Threshold Overdrive" curve in the datasheet. At slower slew rates (e.g., 1mV/µs), the VCC-to-RESET delay is guaranteed ≤80µs. This transient immunity ensures MAX6424UK29+T remains stable during switching regulator ripple or coupled noise in dense PCB layouts.
MAX6424UK29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.925V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6424UK29+T FAQ
1.How can I place an order for MAX6424UK29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6424UK29+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 MAX6424UK29+T reliable?
The price and inventory of MAX6424UK29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6424UK29+T is usually 5 days.
3.What payment methods are accepted for MAX6424UK29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6424UK29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6424UK29+T?
MAX6424UK29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6424UK29+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 MAX6424UK29+T?
For technical support, including MAX6424UK29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6424UK29+T requirements.
6.How does Aetrix verify that MAX6424UK29+T is sourced from the original manufacturer or authorized distributors?
All MAX6424UK29+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 MAX6424UK29+T meets industry standards.
7.What is the process for return or replacement of MAX6424UK29+T?
All MAX6424UK29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6424UK29+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 MAX6424UK29+T part is unused and in its original packaging.
Return procedure for MAX6424UK29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6424UK29+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…
