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Analog Devices Inc./Maxim Integrated MAX6723AUTVHD3+
- Part No.:
- MAX6723AUTVHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723AUTVHD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:903
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Product details
Overview
MAX6723AUTVHD3+ from Maxim Integrated is a dual-supply ultra-low-voltage microprocessor supervisory circuit with factory-trimmed VCC1/VCC2 reset thresholds, adjustable RSTIN input for third-voltage monitoring (626 mV reference), 140 ms minimum reset timeout, and watchdog timer support. It asserts active-low push-pull reset when either supply drops below threshold and maintains reset for ≥140 ms after recovery. Used in telecom power management to ensure reliable boot and brownout recovery of dual-rail SoCs.
For engineers reviewing the MAX6723AUTVHD3+ datasheet, MAX6723AUTVHD3+ pinout, MAX6723AUTVHD3+ application, or MAX6723AUTVHD3+ equivalent, key selection criteria include guaranteed reset validity down to VCC1 or VCC2 = 0.8 V, 14 µA typical supply current at 3.6 V, 626 mV RSTIN threshold tolerance (±15.5 mV), push-pull RST output referenced to VCC1, and SOT23-6 package compatibility with space-constrained industrial control modules.
Technical Context
The MAX6723AUTVHD3+ integrates dual independent voltage comparators for primary (VCC1) and secondary (VCC2) supplies, plus an adjustable RSTIN comparator with 626 mV internal reference. Its reset logic combines OR-ed fault detection (VCC1 undervoltage, VCC2 undervoltage, RSTIN undervoltage, MR assertion) with a monolithic timeout counter ensuring ≥140 ms reset pulse width.
It features a dual-mode watchdog timer: 35 s minimum startup period after reset, followed by 1.12 s minimum normal timeout; WDI accepts CMOS-level transitions and disables automatically when left floating. All outputs are push-pull, referenced to VCC1 (RST/RST1) or VCC2 (RST2), with VOL ≤ 0.3 V at ISINK ≤ 1.2 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625 V (factory-trimmed, ±125 mV tolerance) - sets precise brownout detection point for main system rail |
| VCC2 Reset Threshold | 3.075 V (factory-trimmed, ±75 mV tolerance) - monitors auxiliary/IO supply with guaranteed operation down to 0.8 V |
| RSTIN Threshold | 626.5 mV (internal reference, ±15.5 mV) - enables accurate third-voltage monitoring via external resistor divider |
| Reset Timeout Period | 140 ms (min), 210 ms (typ), 280 ms (max) - ensures sufficient hold time for processor initialization sequences |
| Supply Current | 14 µA (typ) at 3.6 V - minimizes quiescent power in battery-backed or energy-sensitive systems |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
| Watchdog Timeout | 35 s (min startup), 1.12 s (min normal mode) - accommodates long boot sequences then enforces tight software liveliness checks |
Pinout & Package
MAX6723AUTVHD3+ uses a 6-pin SOT23 package (2.9 mm × 1.6 mm × 1.1 mm) with gull-wing leads, RoHS-compliant and lead-free.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST/RST1 | Active-low push-pull reset output referenced to VCC1; asserts when any monitored supply falls below threshold or MR is pulled low |
| 2 | GND | Analog/digital ground reference for all internal comparators and timing circuits |
| 3 | MR | Active-low manual-reset input with 50 kΩ internal pullup to VCC1; forces reset on logic-low pulse ≥1 µs |
| 4 | VCC2 | Secondary supply input (0.8 V to 5.5 V); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (0.8 V to 5.5 V); powers device core, sets RST/RST1 output reference, and enables reset assertion logic |
| 6 | RSTIN | Adjustable undervoltage monitor input; compares external divided voltage against 626.5 mV reference; high-impedance (±100 nA leakage) |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply monitoring | VCC1 (1.58–4.63 V thresholds) and VCC2 (0.79–3.08 V thresholds) with separate comparators and hysteresis |
| Externally adjustable third-voltage monitor | RSTIN input with 626.5 mV precision reference enables monitoring of supplies as low as 0.62 V using resistor dividers |
| Dual-mode watchdog timer | 35 s startup window for safe boot, then 1.12 s normal timeout - prevents false resets during initialization while enforcing runtime reliability |
| Guaranteed reset validity at low VCC | Reset output remains functional and logic-valid even when VCC1 or VCC2 drops to 0.8 V - critical for brownout resilience |
| Immunity to short VCC transients | Withstands negative-going VCC glitches ≤20 µs (at 100 mV overdrive) without spurious reset - reduces need for external filtering |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Dual-rail FPGA-based baseband processor with 3.3 V I/O and 1.2 V core supplies requiring coordinated power-up and brownout detection. IC Role / Device Role / Timing Role: Supervises both rails simultaneously; asserts RST on first undervoltage event and holds for 140 ms to guarantee FPGA configuration stability. Use Value: Eliminates need for discrete RC timers and dual comparators, reducing BOM count by 3 components and PCB area by >25 mm². |
Use Scenario: DIN-rail mounted programmable logic controller with isolated 24 V DC input and internal 5 V/3.3 V regulation. IC Role / Device Role / Timing Role: Monitors 5 V regulator output (VCC1) and 3.3 V logic rail (VCC2); triggers reset on either rail collapse to prevent corrupted I/O state. Use Value: Enables deterministic recovery from transient line dips without firmware intervention, meeting IEC 61000-4-4 Level 3 immunity requirements. |
| Automotive ADAS Camera ECU | Medical Infusion Pump Controller |
Use Scenario: Vision-processing module powered from vehicle battery (via buck converter) with 12 V input, 3.3 V I/O, and 1.1 V core. IC Role / Device Role / Timing Role: Uses RSTIN to monitor 3.3 V rail via resistor divider while VCC1/VCC2 supervise primary converters; supports AEC-Q100-compliant designs. Use Value: Provides triple-voltage supervision in single 6-pin SOT23, satisfying ISO 26262 ASIL-B diagnostic coverage for power monitoring. |
Use Scenario: Battery-powered infusion pump with Li-ion pack, 5 V DC-DC, and 3.3 V MCU rail requiring fail-safe shutdown on low battery. IC Role / Device Role / Timing Role: Configures RSTIN to monitor battery voltage via divider; asserts reset before battery reaches critical cutoff, enabling controlled motor stop. Use Value: Achieves <1 µA total system standby current (including supervisor) by leveraging 14 µA ICC1 and open-drain-compatible RSTIN input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724AUTVHD3+ | Identical pinout, same VCC1/VCC2 thresholds (4.625 V / 3.075 V) and 140 ms timeout, but includes PFI/PFO power-fail interface instead of RSTIN | Used where early power-fail warning (e.g., battery low alert) is required instead of third-voltage monitoring | Select MAX6724AUTVHD3+ when PFO-driven interrupt generation is needed; MAX6723AUTVHD3+ is preferred for auxiliary rail supervision. |
| TPS3808G33DBVR | Single-supply (3.3 V only), no RSTIN or VCC2 input; 200 ms fixed timeout; 1.6 µA supply current; SOT23-6 package | Limited to single-rail systems; lacks dual/third-voltage capability and watchdog timer | Choose TPS3808G33DBVR only for cost-sensitive, single-rail applications without watchdog or multi-supply requirements. |
Compared with MAX6724AUTVHD3+, MAX6723AUTVHD3+ trades power-fail signaling for flexible third-voltage monitoring via RSTIN, making it superior for multirail SoC supervision; versus TPS3808G33DBVR, it delivers full dual-supply supervision, watchdog, and adjustable monitoring at higher quiescent current but broader functional coverage.
Availability
MAX6723AUTVHD3+ is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and automotive ADAS applications requiring stable component supply, extended temperature operation, and AEC-Q100-aligned reliability.
Supply support for MAX6723AUTVHD3+ 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 power, sensing, connectivity, and security applications across industrial, automotive, and communications markets.
The MAX6715A–MAX6729A family delivers ultra-low-voltage supervisory circuits optimized for multivoltage systems with tight reset accuracy, low quiescent current, and integrated watchdog functionality - targeting space- and power-constrained embedded controllers.
FAQ
What is the exact reset timeout period for MAX6723AUTVHD3+?
The MAX6723AUTVHD3+ has a guaranteed minimum reset timeout period of 140 ms, a typical value of 210 ms, and a maximum of 280 ms. This timing is factory-trimmed and specified over the full -40°C to +125°C operating temperature range. The timeout begins when the last monitored supply rises above its threshold and ends with deassertion of the RST output.
Does MAX6723AUTVHD3+ support watchdog functionality?
Yes, MAX6723AUTVHD3+ includes a dual-mode watchdog timer with a 35 s minimum startup period after reset and a 1.12 s minimum normal timeout period. The watchdog monitors the WDI pin for transitions; if no edge occurs within the timeout window, it triggers the reset output for the full 140 ms timeout period. WDI is disabled when left unconnected.
What are the factory-trimmed reset thresholds for MAX6723AUTVHD3+?
MAX6723AUTVHD3+ has factory-trimmed VCC1 and VCC2 reset thresholds of 4.625 V (±125 mV) and 3.075 V (±75 mV), respectively. These values are encoded in the "TV" suffix per Maxim's Reset Voltage Threshold Suffix Guide. The RSTIN input uses a fixed 626.5 mV internal reference for externally adjustable monitoring.
Can MAX6723AUTVHD3+ operate with VCC1 or VCC2 below 1.0 V?
Yes, MAX6723AUTVHD3+ guarantees valid reset output logic states with VCC1 or VCC2 as low as 0.8 V. This ensures reliable brownout detection and reset assertion during deep supply sag - a key differentiator versus competitors that require ≥1.2 V for reset validity. Operation below 0.8 V is not specified.
Is MAX6723AUTVHD3+ pin-compatible with other devices in the MAX67xxA family?
MAX6723AUTVHD3+ uses a 6-pin SOT23 package and shares identical pinout with MAX6719A, MAX6720A, MAX6721A, MAX6722A, MAX6724A, and MAX6729A variants. However, pin functions differ across subfamilies - for example, MAX6728A/MAX6729A use Pin 6 for PFI instead of RSTIN. Always verify function mapping using the specific device's Pin Description table.
MAX6723AUTVHD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.313V, 1.575V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6723AUTVHD3+ FAQ
1.How can I place an order for MAX6723AUTVHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723AUTVHD3+ 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 MAX6723AUTVHD3+ reliable?
The price and inventory of MAX6723AUTVHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723AUTVHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6723AUTVHD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723AUTVHD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723AUTVHD3+?
MAX6723AUTVHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723AUTVHD3+ 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 MAX6723AUTVHD3+?
For technical support, including MAX6723AUTVHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723AUTVHD3+ requirements.
6.How does Aetrix verify that MAX6723AUTVHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6723AUTVHD3+ 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 MAX6723AUTVHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6723AUTVHD3+?
All MAX6723AUTVHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723AUTVHD3+, 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 MAX6723AUTVHD3+ part is unused and in its original packaging.
Return procedure for MAX6723AUTVHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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