My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6720UTZGD3+T
- Part No.:
- MAX6720UTZGD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720UTZGD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6720UTZGD3+T 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 RSTIN input (626.5mV reference). It asserts active-low push-pull reset for ≥210ms after any monitored supply drops below threshold or manual reset is triggered, and supports watchdog timeout with 35s startup and 1.12s normal mode. Used in multivoltage telecom power systems to ensure reliable µP boot and brownout recovery.
For engineers reviewing the MAX6720UTZGD3+T datasheet, MAX6720UTZGD3+T pinout, MAX6720UTZGD3+T application, or MAX6720UTZGD3+T equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-supply monitoring behavior, and real-world design context for industrial and embedded power integrity validation.
Technical Context
The MAX6720UTZGD3+T implements a dual-threshold comparator architecture with factory-trimmed VTH1 = 4.625V (±125mV) and VTH2 = 3.075V (±75mV), plus a high-impedance RSTIN input referenced to a 626.5mV internal bandgap. Its reset logic combines OR-gated fault detection across VCC1, VCC2, RSTIN, and MR inputs, with a monolithic timeout timer guaranteeing ≥210ms reset assertion after recovery.
It features push-pull RST output referenced to VCC1, internal 50kΩ MR pullup, and watchdog functionality with asymmetric timing: 35s minimum initial timeout post-reset and 1.12s minimum normal-mode timeout after first WDI edge. Reset validity is guaranteed down to VCC1 or VCC2 = 0.8V, enabling robust operation during deep brownouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (±125mV); monitors primary 5V/4.5V rails with precise brownout detection |
| VCC2 Threshold | 3.075V (±75mV); tracks secondary 3.3V supplies independently of VCC1 |
| RSTIN Reference | 626.5mV internal bandgap; enables third-voltage monitoring down to 0.62V via resistor divider |
| Reset Timeout | 210ms (min); ensures µP completes full initialization before release |
| Supply Current | 14µA (typ at 3.6V); ultra-low quiescent draw for battery-backed or energy-sensitive systems |
| Watchdog Period | 35s startup / 1.12s normal mode; accommodates long boot sequences then tight runtime supervision |
| Operating Temp | -40°C to +85°C; qualified for industrial and telecom equipment environments |
Pinout & Package
MAX6720UTZGD3+T uses a 6-pin SOT23-6 package with gull-wing leads, 1.27mm pitch, and 2.9mm × 1.6mm footprint - compatible with standard reflow assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; drives µP reset pin directly without external pullup |
| 2 | GND | System ground reference for all comparators, timers, and I/O; must be low-impedance connection |
| 3 | MR | Active-low manual reset input with internal 50kΩ pullup to VCC1; debounced by 1µs pulse width requirement |
| 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, sets RST output reference, and enables reset validity down to 0.8V |
| 6 | RSTIN | Adjustable undervoltage monitor input; high-impedance node for third-rail sensing using resistor divider to 626.5mV reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VTH1 = 4.625V ±125mV and VTH2 = 3.075V ±75mV enable precise, temperature-stable monitoring of 5V/3.3V rails without calibration |
| Externally adjustable RSTIN input | 626.5mV internal reference allows third-voltage monitoring from 0.62V up to VCC1 using two external resistors - no additional IC needed |
| Asymmetric watchdog timer | 35s startup timeout prevents false resets during boot; 1.12s normal timeout ensures rapid fault detection during runtime |
| Guaranteed reset validity to 0.8V | Ensures clean, deterministic reset assertion even during severe brownout conditions where VCC1 or VCC2 dips near 0.8V |
| Low 14µA supply current | Minimizes system standby power; critical for battery-operated or always-on telecom modules requiring >10-year shelf life |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Monitoring primary 48V-to-5V DC/DC output and isolated 3.3V logic rail in carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting synchronized reset to ARM-based controller and FPGA configuration logic. Use Value: Prevents partial initialization during input voltage sag by holding reset until both rails stabilize above 4.625V and 3.075V for ≥210ms. |
Use Scenario: Ensuring safe startup of analog input/output circuits powered by separate 24V and 5V supplies in programmable logic controllers. IC Role / Device Role / Timing Role: Triple-monitoring IC validating main 24V bus, isolated 5V logic, and auxiliary 3.3V sensor supply before enabling I/O drivers. Use Value: Eliminates need for discrete comparators and RC timers; reduces BOM count by three components while improving threshold accuracy ±0.5%. |
| Embedded Network Router | Battery-Backed Storage Controller |
|
Use Scenario: Coordinating power-up sequence of CPU, DDR memory, and PHY transceivers in fanless enterprise routers. IC Role / Device Role / Timing Role: Supervisory circuit with RSTIN monitoring backup 3.3V LDO to trigger graceful shutdown when main 12V fails. Use Value: Uses single RSTIN pin and resistor divider to add third-rail monitoring - avoids adding dedicated PFI IC or firmware polling overhead. |
Use Scenario: Maintaining data integrity during AC power loss in NVMe SSD controllers with supercapacitor backup. IC Role / Device Role / Timing Role: Low-current (14µA) supervisor detecting 5V rail collapse and asserting reset to halt writes before capacitor depletes. Use Value: Enables >10-second hold-up time with <10µA total system standby current - extends safe shutdown window by 3× vs. typical 50µA supervisors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720UTZTD3+T | VTH1 = 4.25V (vs. 4.625V); same package, timing, and RSTIN capability | Suitable for systems with tighter 4.25V brownout margin on 5V rail | Select when primary supply nominal is 4.5V rather than 5.0V to avoid premature reset assertion |
| TPS3808G33DBVR | Dual fixed thresholds (3.3V/1.2V); no RSTIN input; 200ms timeout; 2.5µA IQ | Lacks third-voltage monitoring and asymmetric watchdog; optimized for ultra-low-power single-rail apps | Choose only for simple 3.3V-only systems where RSTIN and long watchdog startup are unnecessary |
Compared with MAX6720UTZGD3+T, the MAX6720UTZTD3+T offers lower VCC1 threshold for 4.5V systems, while TPS3808G33DBVR trades RSTIN flexibility and watchdog sophistication for lower quiescent current - making MAX6720UTZGD3+T optimal for triple-rail telecom and industrial designs requiring precise, configurable supervision.
Availability
MAX6720UTZGD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, industrial PLC I/O modules, embedded network routers, and battery-backed storage controllers requiring stable component supply across extended product lifecycles.
Supply support for MAX6720UTZGD3+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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX6715–MAX6729 family was designed specifically for multivoltage embedded systems needing compact, accurate, and feature-rich µP supervision - addressing reliability gaps in telecom, server, and portable equipment power domains.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6720UTZGD3+T?
The MAX6720UTZGD3+T has a factory-trimmed VCC1 reset threshold of 4.625V, with a tolerance of ±125mV over temperature. This value is encoded in the "ZG" suffix per Maxim's Reset Voltage Threshold Suffix Guide and is measured under standard conditions with VCC1 falling. The MAX6720UTZGD3+T guarantees this threshold remains stable across -40°C to +85°C with 20ppm/°C tempco.
Does the MAX6720UTZGD3+T support monitoring a third voltage, and how is it configured?
Yes, the MAX6720UTZGD3+T supports third-voltage monitoring via its RSTIN pin, which references an internal 626.5mV bandgap. To configure, connect a resistor divider from the target supply to GND, with the midpoint tied to RSTIN. The monitored threshold is calculated as VEXT_TH = 626.5mV × (R1 + R2)/R2. The MAX6720UTZGD3+T datasheet confirms this function is fully operational and validated for inputs down to 0.62V.
What is the reset timeout period for the MAX6720UTZGD3+T, and is it adjustable?
The MAX6720UTZGD3+T has a fixed reset timeout period of 210ms (minimum), indicated by the "D3" suffix in its part number. This value is laser-trimmed during manufacturing and not user-adjustable. The timeout begins when all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds and ends with RST deassertion. The MAX6720UTZGD3+T guarantees this timing across full temperature and voltage ranges.
Is the reset output of the MAX6720UTZGD3+T open-drain or push-pull?
The MAX6720UTZGD3+T features a push-pull active-low reset output (RST pin), as confirmed by the "U" prefix (indicating push-pull) and "T" suffix (lead-free) in its ordering code, and verified in the Selector Guide. This allows direct drive of µP reset pins without external pullup resistors. The MAX6720UTZGD3+T RST output is referenced to VCC1 and sinks up to 3.2mA while maintaining VOL ≤ 0.4V at VCC1 ≥ 4.5V.
What watchdog timeout modes does the MAX6720UTZGD3+T support?
The MAX6720UTZGD3+T implements a dual-mode watchdog: a 35s minimum startup timeout after any reset event (power-up, MR, or watchdog timeout), followed by a 1.12s minimum normal-mode timeout after the first valid WDI transition. This architecture prevents false resets during boot while ensuring rapid fault detection during runtime. The MAX6720UTZGD3+T watchdog is enabled by default and requires no configuration.
MAX6720UTZGD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.11V, 2.313V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6720UTZGD3+T FAQ
1.How can I place an order for MAX6720UTZGD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720UTZGD3+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 MAX6720UTZGD3+T reliable?
The price and inventory of MAX6720UTZGD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720UTZGD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720UTZGD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720UTZGD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720UTZGD3+T?
MAX6720UTZGD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720UTZGD3+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 MAX6720UTZGD3+T?
For technical support, including MAX6720UTZGD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720UTZGD3+T requirements.
6.How does Aetrix verify that MAX6720UTZGD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720UTZGD3+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 MAX6720UTZGD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720UTZGD3+T?
All MAX6720UTZGD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720UTZGD3+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 MAX6720UTZGD3+T part is unused and in its original packaging.
Return procedure for MAX6720UTZGD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6720UTZGD3+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…
