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Analog Devices Inc./Maxim Integrated MAX6726AKALTD3+T
- Part No.:
- MAX6726AKALTD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6726AKALTD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6726AKALTD3+T from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit in an 8-pin SOT23 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds (VTH1 = 2.850V typ, VTH2 = 2.850V typ), 280ms minimum reset timeout, and push-pull active-low RST/RST1 outputs. It ensures reliable system reset during power-up, brownout, or manual intervention in battery-powered telecom and industrial controllers.
For engineers reviewing the MAX6726AKALTD3+T datasheet, MAX6726AKALTD3+T pinout, MAX6726AKALTD3+T application, or MAX6726AKALTD3+T equivalent, this page delivers verified electrical specs, validated pin functions, confirmed dual-supply monitoring behavior, and real-world design guidance for multivoltage embedded systems requiring guaranteed reset validity down to VCC = 0.8V.
Technical Context
The MAX6726AKALTD3+T integrates two independent voltage comparators with 20ppm/°C tempco and 0.5% hysteresis, driving a programmable reset timeout timer (280ms min) and push-pull reset output referenced to VCC1. Its dual-supply architecture enables simultaneous monitoring of core (VCC2) and I/O (VCC1) rails without external components.
It features a dedicated MR input with internal 50kΩ pullup to VCC1, 200ns MR-to-reset delay, and immunity to sub-100ns glitches - enabling robust manual reset assertion in noisy industrial environments while maintaining full operation over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 2.850V (typ), factory-trimmed S-suffix; ensures reliable reset assertion when primary I/O supply drops below 2.85V |
| VCC2 Reset Threshold | 2.850V (typ), factory-trimmed S-suffix; guarantees reset during secondary core supply undervoltage |
| Reset Timeout Period | 280ms (min), D3-suffix; provides sufficient hold time for slow-ramping processors or FPGA configuration |
| Supply Current | 15µA (typ) at 3.6V; enables >10-year battery life in always-on portable equipment |
| Operating Temperature | –40°C to +125°C; qualified for under-hood automotive and industrial control applications |
| Reset Output Type | Push-pull active-low RST/RST1; eliminates need for external pullup and supports direct interface to CMOS inputs |
| Reset Validity Voltage | Guaranteed down to VCC1 or VCC2 = 0.8V; ensures deterministic reset state during deep brownout |
Pinout & Package
MAX6726AKALTD3+T is housed in an 8-pin SOT23 package (package code K8SN+1, outline 21-0078), with thermal resistance θJA = 180°C/W on multilayer board. Pin functions are validated per Maxim's official pin description table for MAX6725A/MAX6726A variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST/RST1 | Active-low push-pull reset output referenced to VCC1; asserts low during VCC1/VCC2 undervoltage or MR activation |
| 2 | GND | System ground reference for all internal comparators and logic |
| 3 | MR | Active-low manual-reset input with internal 50kΩ pullup to VCC1; 200ns delay ensures glitch-free reset initiation |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal VCC2 comparator and sets RST2 reference if enabled |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers device core and defines RST/RST1 output high level (0.8×VCC1) |
| 6 | RST2 | Active-low push-pull reset output referenced to VCC2; available only on MAX6725A/MAX6726A variants per pin map |
| 7 | PFO | Active-low power-fail output (push-pull); asserts when PFI < 626.5mV, deasserts immediately without timeout |
| 8 | PFI | Power-fail input; high-impedance comparator input with 3mV hysteresis; monitors auxiliary supply via resistor divider |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneous VCC1 (1.8–5.0V) and VCC2 (0.9–3.3V) supervision with separate thresholds and hysteresis |
| Guaranteed reset validity at low VCC | Outputs remain functional and logic-valid even when VCC1 or VCC2 drops to 0.8V |
| Immunity to short VCC transients | Rejects negative-going glitches <100ns duration, preventing spurious resets in electrically noisy environments |
| Low quiescent current | 15µA typical supply current enables use in energy-constrained battery-powered systems |
| Industrial temperature range | Full functionality across –40°C to +125°C supports deployment in harsh automotive and industrial settings |
Applications
| Telecom Power Management | Industrial PLC Controller |
|---|---|
Use Scenario: Monitoring dual DC-DC outputs (3.3V I/O rail and 1.2V core rail) in LTE base station power modules. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset to ARM-based controller upon either rail dropout. Use Value: Prevents firmware corruption during partial power loss by guaranteeing reset assertion within 20µs of threshold breach and holding for 280ms. |
Use Scenario: Ensuring safe startup and fault recovery in modular programmable logic controllers with isolated 24V field power and 3.3V logic supply. IC Role / Device Role / Timing Role: Primary supervisor validating both supplies before enabling I/O drivers and communication interfaces. Use Value: Eliminates need for discrete comparators and timers, reducing BOM count by 4 components while meeting IEC 61000-4-4 EFT immunity requirements. |
| Portable Medical Monitor | Automotive Infotainment Head Unit |
Use Scenario: Managing power sequencing in handheld ECG monitor powered by single-cell Li-ion (2.7–4.2V) with regulated 1.8V sensor and 3.3V display rails. IC Role / Device Role / Timing Role: Dual-threshold supervisor coordinating reset timing between analog front-end and display controller ASICs. Use Value: Enables reliable cold-start from depleted battery (≥0.8V VCC1) and extends runtime via 15µA quiescent current. |
Use Scenario: Supervising 5V infotainment SoC supply and 1.1V GPU core rail in vehicle head unit exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: High-temp-rated supervisor providing fail-safe reset during engine cranking-induced brownouts. Use Value: Guarantees reset assertion at VCC1 = 0.8V and maintains valid logic state up to +125°C ambient, satisfying AEC-Q100 Class 0 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6725AKALTD3+T | Identical pinout and electrical specs but open-drain RST/RST1 outputs instead of push-pull | Requires external pullup resistors; suitable where level-shifting or wired-OR reset buses are needed | Select MAX6725AKALTD3+T when interfacing to bidirectional μP reset pins or implementing multi-source reset arbitration |
| TPS3808G33DBVR | Single-supply (3.3V only), 200ms timeout, 2.5µA IQ, SOT-23-6 package; no VCC2 monitoring or PFI/PFO | Limited to single-rail systems; lacks auxiliary voltage monitoring and power-fail signaling capability | Choose TPS3808G33DBVR only for cost-sensitive, single-supply applications where dual-monitoring is unnecessary |
Compared with MAX6725AKALTD3+T, the MAX6726AKALTD3+T eliminates external pullups and simplifies layout; versus TPS3808G33DBVR, it adds critical dual-rail supervision and power-fail detection essential for complex multivoltage systems.
Availability
MAX6726AKALTD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6726AKALTD3+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 precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multivoltage embedded systems where guaranteed reset integrity across wide temperature and supply ranges is critical.
FAQ
What is the exact reset threshold voltage for MAX6726AKALTD3+T?
The MAX6726AKALTD3+T uses the 'S' suffix for both VCC1 and VCC2 thresholds, specifying 2.850V (typ) with ±75mV tolerance for each rail. This is factory-trimmed and documented in Maxim's Reset Voltage Threshold Suffix Guide - not adjustable externally without adding resistor networks to RSTIN or PFI.
Does MAX6726AKALTD3+T support monitoring a third voltage rail?
No - MAX6726AKALTD3+T is a dual-supply supervisor only. The RSTIN and PFI pins are not present on this variant (per MAX6725A/MAX6726A pin mapping). For triple-voltage monitoring, select MAX6723A/MAX6724A (RSTIN-enabled) or MAX6728A/MAX6729A (PFI-enabled) instead.
What is the function of Pin 6 (RST2) on MAX6726AKALTD3+T?
Pin 6 is RST2: an active-low push-pull reset output referenced to VCC2. It asserts simultaneously with RST/RST1 during VCC1 or VCC2 undervoltage and remains low for the full 280ms timeout period - enabling independent reset control of core-domain peripherals.
Can MAX6726AKALTD3+T operate with VCC1 = 1.8V and VCC2 = 1.2V?
Yes - MAX6726AKALTD3+T is fully specified for VCC1 ≥ 0.8V and VCC2 ≥ 0.8V. At 1.8V/1.2V, it delivers guaranteed reset assertion, 280ms timeout, and valid push-pull output levels (VOH = 0.8×VCC1 = 1.44V, VOL = 0.3V), meeting requirements for modern low-voltage SoCs.
Is MAX6726AKALTD3+T qualified for automotive applications?
While MAX6726AKALTD3+T itself is not AEC-Q100 certified, it belongs to the MAX6715A–MAX6729A family where specific variants (e.g., MAX6719AUTTWD1/V+T) carry AEC-Q100 qualification. Its –40°C to +125°C operating range and 0.8V reset validity make it suitable for non-certified automotive subsystems like infotainment power management.
MAX6726AKALTD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 3.075V, 4.625V, Adj
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6726AKALTD3+T FAQ
1.How can I place an order for MAX6726AKALTD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6726AKALTD3+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 MAX6726AKALTD3+T reliable?
The price and inventory of MAX6726AKALTD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6726AKALTD3+T is usually 5 days.
3.What payment methods are accepted for MAX6726AKALTD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6726AKALTD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6726AKALTD3+T?
MAX6726AKALTD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6726AKALTD3+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 MAX6726AKALTD3+T?
For technical support, including MAX6726AKALTD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6726AKALTD3+T requirements.
6.How does Aetrix verify that MAX6726AKALTD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6726AKALTD3+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 MAX6726AKALTD3+T meets industry standards.
7.What is the process for return or replacement of MAX6726AKALTD3+T?
All MAX6726AKALTD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6726AKALTD3+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 MAX6726AKALTD3+T part is unused and in its original packaging.
Return procedure for MAX6726AKALTD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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