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Analog Devices Inc./Maxim Integrated MAX6723UTVHD3+
- Part No.:
- MAX6723UTVHD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6723UTVHD3+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
MAX6723UTVHD3+ from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable third supply via RSTIN (626.5mV reference). It asserts active-low open-drain reset for 210ms (min) after any monitored voltage drops below threshold, and features manual reset input and watchdog timer disable - used in telecom power management and multivoltage embedded systems.
For engineers reviewing the MAX6723UTVHD3+ datasheet, MAX6723UTVHD3+ pinout, MAX6723UTVHD3+ application, or MAX6723UTVHD3+ equivalent, key selection criteria include triple-supply monitoring capability, guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, immunity to short VCC transients, and compatibility with battery-backed or low-power industrial controllers requiring precise undervoltage detection.
Technical Context
The MAX6723UTVHD3+ implements dual independent voltage comparators for VCC1 and VCC2, plus a high-impedance RSTIN comparator referenced to a 626.5mV internal bandgap. Reset assertion is latched and held for a factory-programmed 210ms minimum timeout period after all monitored voltages recover above their thresholds.
It includes a manual reset input (MR) with internal 50kΩ pullup to VCC1 and supports watchdog disable mode (no WDI pin connection required). The device operates across -40°C to +85°C and guarantees valid reset logic state as long as either VCC1 or VCC2 remains ≥0.8V - critical for brownout resilience in portable equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (factory-trimmed, falling edge; ensures reliable reset during 5V rail collapse) |
| VCC2 Threshold | 3.075V (factory-trimmed, falling edge; matches common 3.3V I/O supply tolerance) |
| RSTIN Reference | 626.5mV (internal precision reference enables third-supply monitoring down to 0.62V) |
| Reset Timeout | 210ms min (D3 suffix; provides sufficient hold time for FPGA/ASIC configuration recovery) |
| Supply Current | 14µA typ at 3.6V (enables >10-year battery life in always-on monitoring applications) |
| Operating Temp | -40°C to +85°C (supports industrial-grade deployment without derating) |
| Reset Output | Active-low open-drain (requires external pullup; compatible with mixed-voltage µP reset pins) |
Pinout & Package
MAX6723UTVHD3+ is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+ suffix). Pin 1 is marked with dot; pinout follows standard SOT23 orientation with GND at pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserted when VCC1/VCC2/RSTIN fall below thresholds or MR is pulled low |
| 2 | GND | Ground reference for all internal comparators and logic; must be low-impedance connection |
| 3 | MR | Active-low manual reset input; internal 50kΩ pullup to VCC1; 1µs minimum pulse width required |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V range); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V range); powers core logic, VCC1 comparator, and RST output driver |
| 6 | RSTIN | Adjustable reset monitor input; high-impedance node referenced to 626.5mV; used for third-voltage supervision |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply monitoring | Simultaneous VCC1 (4.625V), VCC2 (3.075V), and RSTIN (adjustable via resistor divider) supervision with independent comparators |
| Guaranteed reset validity | Reset output remains logically valid even when VCC1 or VCC2 drops to 0.8V - essential for graceful shutdown sequencing |
| Low-power operation | 14µA typical ICC at 3.6V enables integration into energy-constrained IoT sensor nodes and backup power circuits |
| Transient immunity | Immune to VCC glitches ≤20µs (at 100mV overdrive); eliminates spurious resets in noisy switching power supply environments |
| Manual reset support | MR pin with internal 50kΩ pullup simplifies pushbutton interface - no external components needed for basic reset functionality |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring primary 5V DC-DC output, secondary 3.3V logic rail, and auxiliary 1.2V FPGA core supply in carrier-grade line cards. IC Role / Device Role / Timing Role: Triple-voltage supervisor ensuring synchronized reset assertion across power domains during cold start or brownout. Use Value: Prevents partial initialization of communication ASICs by enforcing 210ms reset hold time until all rails stabilize within ±3%. |
Use Scenario: Supervising 24V field bus supply, 5V controller rail, and 3.3V analog sensor interface in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Fault-detection hub that triggers system-wide reset upon undervoltage on any monitored rail, including isolated auxiliary supplies. Use Value: Enables deterministic fail-safe behavior per IEC 61508 SIL-2 requirements using factory-trimmed thresholds and <20ppm/°C tempco. |
| Medical Diagnostic Handhelds | Automotive Infotainment ECUs |
Use Scenario: Managing battery-backed 3.3V main logic, 1.8V display driver, and 0.9V ultra-low-power MCU core in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor extending battery runtime while guaranteeing reset integrity down to 0.8V on weakest rail. Use Value: Achieves >12-month shelf life on coin cell via 14µA ICC and eliminates false resets during RF transmission-induced supply noise. |
Use Scenario: Monitoring 12V battery input, 5V infotainment SoC rail, and 1.1V GPU core supply in head-unit designs subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Robust voltage monitor interfacing with automotive-grade µP reset pin via open-drain output and external pullup. Use Value: Survives -40°C to +85°C ambient with guaranteed reset assertion at VCC1 = 0.8V - critical for cold-start reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6724UTVHD3+ | Push-pull RST output (vs. open-drain); same VCC1/VCC2 thresholds, RSTIN, and 210ms timeout | Requires no external pullup; better suited for single-rail systems where reset polarity must match µP input logic | Select when µP reset pin is unidirectional and driven only by supervisor - avoids risk of contention with bidirectional reset I/O |
| TPS3808G33DBVR | Dual-supply monitor only (VDD1/VDD2); no RSTIN; fixed 3.08V/3.08V thresholds; 200ms timeout; 1.6µA ICC | Lacks third-supply monitoring; optimized for ultra-low-power wearables rather than multirail telecom infrastructure | Choose only if third-voltage supervision is unnecessary and sub-2µA quiescent current is mandatory for battery lifetime |
Compared with MAX6724UTVHD3+, the MAX6723UTVHD3+ offers open-drain flexibility for mixed-voltage reset buses but requires an external pullup; versus TPS3808G33DBVR, it adds critical RSTIN-based third-rail monitoring at higher ICC, making it suitable for complex power architectures where three independent supply validations are required.
Availability
MAX6723UTVHD3+ is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, and medical diagnostic handhelds requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for MAX6723UTVHD3+ 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, communications, and computing applications, with emphasis on power efficiency and reliability.
The MAX6715–MAX6729 family delivers ultra-low-voltage supervisory functions for multirail systems, targeting applications where simultaneous monitoring of primary, secondary, and auxiliary supplies is essential for fault-tolerant operation.
FAQ
What is the reset timeout period of the MAX6723UTVHD3+?
The MAX6723UTVHD3+ has a factory-programmed minimum reset timeout period of 210ms, indicated by the "D3" suffix in its part number. This duration is guaranteed over the full -40°C to +85°C operating temperature range and ensures sufficient reset assertion time for complex digital systems like FPGAs or multi-core processors to complete safe initialization or shutdown sequences before release.
Does the MAX6723UTVHD3+ support monitoring a third supply voltage?
Yes, the MAX6723UTVHD3+ supports third-supply monitoring via its RSTIN pin, which references an internal 626.5mV precision bandgap. By connecting an external resistor divider from the target supply to RSTIN and GND, users can set custom reset thresholds down to 0.62V - enabling supervision of auxiliary rails such as FPGA core voltages or sensor bias supplies not covered by VCC1 or VCC2.
What is the function of the MR pin on the MAX6723UTVHD3+?
The MR (manual reset) pin on the MAX6723UTVHD3+ is an active-low input with an internal 50kΩ pullup to VCC1. Pulling MR low forces an immediate reset assertion for the full 210ms timeout period, regardless of VCC1/VCC2 status. It requires only a momentary switch to GND - no external debounce components are needed - making it ideal for field service reset or test-mode entry in embedded systems.
Is the MAX6723UTVHD3+ compatible with systems powered by 1.8V logic rails?
Yes, the MAX6723UTVHD3+ is fully compatible with 1.8V systems: its VCC2 input accepts voltages from 0.9V to 3.3V, and its reset output remains valid down to VCC1 or VCC2 = 0.8V. When used with a 1.8V VCC2 supply, the device maintains accurate 3.075V threshold detection and drives the open-drain RST output with proper logic levels referenced to the 1.8V domain.
What package type does the MAX6723UTVHD3+ use?
The MAX6723UTVHD3+ uses a 6-pin SOT23-6 surface-mount package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free, denoted by the "+" suffix. This compact footprint supports high-density PCB layouts in space-constrained applications such as portable medical devices and telecom line cards, while maintaining thermal performance across the full industrial temperature range.
MAX6723UTVHD3+ 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6723UTVHD3+ FAQ
1.How can I place an order for MAX6723UTVHD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6723UTVHD3+ 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 MAX6723UTVHD3+ reliable?
The price and inventory of MAX6723UTVHD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6723UTVHD3+ is usually 5 days.
3.What payment methods are accepted for MAX6723UTVHD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6723UTVHD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6723UTVHD3+?
MAX6723UTVHD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6723UTVHD3+ 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 MAX6723UTVHD3+?
For technical support, including MAX6723UTVHD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6723UTVHD3+ requirements.
6.How does Aetrix verify that MAX6723UTVHD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6723UTVHD3+ 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 MAX6723UTVHD3+ meets industry standards.
7.What is the process for return or replacement of MAX6723UTVHD3+?
All MAX6723UTVHD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6723UTVHD3+, 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 MAX6723UTVHD3+ part is unused and in its original packaging.
Return procedure for MAX6723UTVHD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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