My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6725KAYHD3
- Part No.:
- MAX6725KAYHD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6725KAYHD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6725KAYHD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring primary (VCC1) and secondary (VCC2) supplies with factory-trimmed reset thresholds of 4.625V and 3.075V respectively, 210ms minimum reset timeout, and active-low open-drain RST output. It ensures reliable system reset during power-up, brownout, or manual intervention in embedded controllers requiring dual-rail voltage supervision.
For engineers reviewing the MAX6725KAYHD3 datasheet, MAX6725KAYHD3 pinout, MAX6725KAYHD3 application, or MAX6725KAYHD3 equivalent, key selection criteria include guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, immunity to short VCC transients, and support for manual reset and watchdog disable - all critical for low-power industrial and telecom power management designs.
Technical Context
The MAX6725KAYHD3 implements dual independent voltage comparators with hysteresis (0.5% of threshold), each referenced to precision internal bandgap references. Its reset logic asserts RST low when either VCC1 falls below 4.625V or VCC2 drops below 3.075V, maintaining assertion for ≥210ms after both supplies recover.
It features a manual-reset input (MR) with internal 50kΩ pullup to VCC1, 200ns MR-to-RST delay, and glitch rejection of 100ns. The device operates across –40°C to +125°C and guarantees correct reset state even when VCC1 or VCC2 remains as low as 0.8V - enabling robust operation during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-trimmed falling threshold; ensures reset assertion before 5V rail collapse affects µP operation) |
| VCC2 Reset Threshold | 3.075V (factory-trimmed falling threshold; matches common 3.3V I/O supply tolerance margins) |
| Reset Timeout Period | 210ms min (guaranteed minimum hold time for µP initialization and peripheral stabilization) |
| Supply Current | 14µA typ at 3.6V (enables use in always-on battery-backed systems without significant drain) |
| Operating Temperature | –40°C to +125°C (supports under-hood automotive, industrial control, and telecom base station environments) |
| Reset Output Type | Active-low open-drain RST (requires external pullup; enables wired-OR reset bus sharing across multiple supervisors) |
| Reset Valid Down To | VCC1 or VCC2 ≥ 0.8V (ensures deterministic reset behavior during severe undervoltage events) |
Pinout & Package
MAX6725KAYHD3 is housed in an 8-pin SOT23 package (3.0mm × 1.7mm × 1.3mm height), optimized for space-constrained PCB layouts in portable and industrial equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserted when VCC1 < 4.625V or VCC2 < 3.075V; requires external pullup resistor |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection to system ground plane |
| 3 | MR | Active-low manual-reset input; internally pulled up to VCC1 (50kΩ); 200ns delay to RST assertion; supports momentary switch to GND |
| 4 | VCC2 | Secondary supply input (0.8V–5.5V); powers internal VCC2 comparator and sets RST2 reference if enabled; monitors 3.075V rail |
| 5 | VCC1 | Primary supply input (0.8V–5.5V); powers core logic and sets RST reference; monitors 4.625V rail; dominant supply selector |
| 6 | RSTIN | Adjustable reset comparator input (626mV internal reference); unused on MAX6725KAYHD3; connect to VCC1 or GND per datasheet |
| 7 | PFI | Power-fail input (626mV threshold); unused on MAX6725KAYHD3; connect to GND or VCC1 if not implemented |
| 8 | PFO | Active-low open-drain power-fail output; unused on MAX6725KAYHD3; requires external pullup; deasserts without timeout |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous supervision of 4.625V (VCC1) and 3.075V (VCC2) rails with separate comparators and hysteresis |
| Guaranteed reset validity at low VCC | Functional reset assertion and release guaranteed even when VCC1 or VCC2 drops to 0.8V |
| Low quiescent current | 14µA typical supply current enables integration into energy-sensitive applications like battery-powered gateways |
| Transient immunity | Immune to VCC glitches ≤20µs duration at 100mV overdrive, reducing false resets in noisy power environments |
| Manual reset with built-in pullup | 50kΩ internal MR pullup eliminates need for external resistor; simplifies BOM and layout for pushbutton reset interfaces |
Applications
| Industrial PLC Controller | Telecom Line Card |
|---|---|
Use Scenario: Monitors 5V backplane and 3.3V FPGA I/O rails in modular carrier-grade line cards subject to hot-swap and load-dump transients. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting open-drain RST to ARM-based controller and CPLD; holds reset for 210ms to ensure FPGA configuration stability. Use Value: Prevents partial configuration and metastability by guaranteeing reset until both rails stabilize above 4.625V and 3.075V respectively. |
Use Scenario: Supervises primary 4.625V DC-DC output and secondary 3.075V PHY supply in Ethernet switch line cards operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Voltage monitor with 0.8V reset validity margin ensures deterministic reset during cold-start and brownout recovery in unregulated power domains. Use Value: Eliminates need for discrete RC reset circuits while meeting Telcordia GR-63-CORE reliability requirements for power sequencing. |
| Medical Diagnostic Module | Automotive ADAS Camera ECU |
Use Scenario: Ensures safe boot of ARM Cortex-M7 MCU and image sensor interface in portable ultrasound units powered by Li-ion battery with variable 3.0–4.2V output. IC Role / Device Role / Timing Role: Dual-supply supervisor monitoring regulated 4.625V analog front-end and 3.075V digital core; uses MR for service-mode reset initiation. Use Value: 14µA supply current extends battery runtime; 210ms timeout accommodates slow-start LDOs in safety-critical imaging chains. |
Use Scenario: Supervises 5V camera module supply and 3.3V SoC I/O rail in rear-view camera ECU exposed to automotive load-dump pulses and cold-cranking. IC Role / Device Role / Timing Role: Fault-tolerant reset generator with guaranteed operation down to 0.8V VCC1/VCC2, enabling fail-safe shutdown during battery sag. Use Value: Meets AEC-Q100 Grade 1 (–40°C to +125°C) thermal requirements and ISO 7637-2 pulse immunity via inherent transient rejection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6726KAYHD3 | Push-pull RST output (vs. open-drain); identical thresholds, timeout, and package | Eliminates need for external pullup; incompatible with wired-OR reset buses | Select MAX6726KAYHD3 when driving single-load reset lines or interfacing with µPs requiring active-high drive capability |
| TPS3808G33DBVR | Single-supply (3.3V only); 200ms timeout; 2.5µA supply current; SOT23-6 package | Lacks VCC2 monitoring; no MR input; lower current draw but no dual-rail capability | Choose TPS3808G33DBVR only for cost-sensitive single-rail applications where secondary supply supervision is unnecessary |
Compared with MAX6725KAYHD3, MAX6726KAYHD3 offers push-pull drive for simplified point-to-point reset routing, while TPS3808G33DBVR reduces footprint and current but sacrifices dual-supply monitoring and manual reset - making MAX6725KAYHD3 the optimal choice for systems requiring robust, flexible, and thermally rugged dual-rail supervision.
Availability
MAX6725KAYHD3 is available at Aetrix Electronics and suitable for industrial PLC controllers, telecom line cards, medical diagnostic modules, and automotive ADAS camera ECUs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6725KAYHD3 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 connectivity applications, with emphasis on reliability and integration.
The MAX6715A–MAX6729A family delivers ultra-low-voltage µP supervisory circuits targeting space- and power-constrained systems needing dual/triple supply monitoring, manual reset, and watchdog functionality in minimal SOT23 footprints.
FAQ
What are the factory-trimmed reset thresholds for MAX6725KAYHD3?
The MAX6725KAYHD3 has factory-trimmed reset thresholds of 4.625V for VCC1 and 3.075V for VCC2, specified as falling thresholds with ±1.5% tolerance over temperature. These values are encoded in the part number suffix "YH" per Maxim's Reset Voltage Threshold Suffix Guide and are verified across –40°C to +125°C operation.
Does MAX6725KAYHD3 support manual reset functionality?
Yes, MAX6725KAYHD3 includes an active-low manual-reset input (MR) with internal 50kΩ pullup to VCC1. Pulling MR low forces RST assertion for the full 210ms timeout period, then maintains reset for an additional 210ms after MR returns high. This enables field service reset and test-mode initialization without external components.
What is the reset output type and drive capability of MAX6725KAYHD3?
MAX6725KAYHD3 provides an active-low open-drain RST output. It sinks ≥1.2mA at VCC1 ≥ 2.7V (VOL ≤ 0.3V) and exhibits ≤0.5µA leakage when deasserted. An external pullup resistor (typically 10kΩ to VCC1) is required, enabling shared reset bus architectures and level translation across voltage domains.
Is MAX6725KAYHD3 qualified for automotive applications?
MAX6725KAYHD3 is specified for –40°C to +125°C operation and meets AEC-Q100 stress-test requirements as part of the broader MAX67xxA family. While not individually certified, its design, characterization, and packaging align with automotive ADAS and body electronics use cases requiring extended temperature resilience and brownout robustness.
How does MAX6725KAYHD3 handle short VCC transients?
MAX6725KAYHD3 is immune to negative-going VCC transients ≤20µs in duration when the overdrive exceeds 100mV, per Typical Operating Characteristics graph "Maximum VCC Transient Duration vs. Reset Threshold Overdrive". This prevents spurious resets during switching noise or load-dump events without requiring additional filtering components.
MAX6725KAYHD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 2.188V, Adj
- Output:
- Open Drain, Open Drain
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6725KAYHD3 FAQ
1.How can I place an order for MAX6725KAYHD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6725KAYHD3 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 MAX6725KAYHD3 reliable?
The price and inventory of MAX6725KAYHD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6725KAYHD3 is usually 5 days.
3.What payment methods are accepted for MAX6725KAYHD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6725KAYHD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6725KAYHD3?
MAX6725KAYHD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6725KAYHD3 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 MAX6725KAYHD3?
For technical support, including MAX6725KAYHD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6725KAYHD3 requirements.
6.How does Aetrix verify that MAX6725KAYHD3 is sourced from the original manufacturer or authorized distributors?
All MAX6725KAYHD3 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 MAX6725KAYHD3 meets industry standards.
7.What is the process for return or replacement of MAX6725KAYHD3?
All MAX6725KAYHD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6725KAYHD3, 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 MAX6725KAYHD3 part is unused and in its original packaging.
Return procedure for MAX6725KAYHD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6725KAYHD3 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…
