My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6730UTRD3
- Part No.:
- MAX6730UTRD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6730UTRD3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:843
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6730UTRD3 from Maxim Integrated is a single-voltage microprocessor supervisor IC with active-low open-drain reset output, factory-set +3.075V VCC1 reset threshold, 140ms–280ms reset timeout period (D3), and integrated watchdog timer with 35s startup delay and 1.12s normal timeout. It monitors primary supply voltage in embedded systems requiring reliable power-on reset and code-execution supervision.
For engineers reviewing the MAX6730UTRD3 datasheet, MAX6730UTRD3 pinout, MAX6730UTRD3 application, or MAX6730UTRD3 equivalent, this page delivers verified specifications, SOT23-6 package mapping, manual reset support, watchdog timing behavior, and direct alternatives for multivoltage system design and brownout protection.
Technical Context
The MAX6730UTRD3 implements a dual-mode watchdog timer: a 35s minimum initial timeout after reset enables full system initialization, followed by a 1.12s minimum normal-mode timeout for rapid fault detection during runtime. Its reset logic asserts RST low when VCC1 falls below +3.075V (±1.5% over temperature), with guaranteed validity down to VCC1 = +0.8V.
It features an active-low manual reset input (MR) with internal 50kΩ pullup, 1µs minimum pulse width, and 100ns glitch rejection. The open-drain RST output requires external pullup and remains asserted for the full D3 timeout period (140–280ms) after VCC1 recovery or MR release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | +3.075V nominal (T suffix), ±1.5% tolerance over -40°C to +85°C |
| Reset Timeout Period | D3 option: 140ms (min) to 280ms (max), programmable via part number suffix |
| Watchdog Timeout | 35s min startup delay after reset; 1.12s min normal mode timeout |
| Supply Current | 14µA typical at +3.6V, enabling ultra-low-power battery-backed operation |
| Operating Temperature | -40°C to +85°C extended industrial range, fully specified |
| Reset Output Type | Active-low open-drain RST, requires external pullup resistor |
| Manual Reset Input | Active-low MR with 50kΩ internal pullup to VCC1, 1µs minimum pulse width |
Pinout & Package
SOT23-6 package (6-pin, 1.6mm × 2.9mm footprint), lead-free compatible, rated for -40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; asserts low on VCC1 undervoltage, MR assertion, or watchdog timeout |
| 2 | GND | Ground reference for all internal comparators and logic |
| 3 | WDO | Active-low open-drain watchdog output; asserts low if WDI lacks edge within timeout period |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC1; forces reset when driven low |
| 5 | WDI | Watchdog input; rising/falling edges clear watchdog timer; floating does not disable function |
| 6 | VCC1 | Primary supply input; powers device and feeds VCC1 reset comparator; threshold = +3.075V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set VCC1 threshold | +3.075V (T suffix) eliminates external resistor network and calibration effort |
| Dual-mode watchdog timer | 35s startup delay prevents false timeout during boot; 1.12s runtime timeout ensures fast lockup detection |
| Guaranteed reset validity | RST remains functional down to VCC1 = +0.8V, supporting brownout recovery in low-VCC conditions |
| Immunity to short VCC transients | Rejects sub-100µs falling glitches at VCC1, preventing spurious resets in noisy power environments |
| Low quiescent current | 14µA typical supply current extends battery life in portable and always-on monitoring applications |
Applications
| Computers/Servers | Telecom/Networking Equipment |
|---|---|
Use Scenario: Power-on sequencing and runtime supervision of CPU core and I/O supply rails in x86 or ARM-based servers. IC Role / Device Role / Timing Role: Single-supply supervisor monitoring +3.075V VCC rail; provides clean POR signal and detects firmware hang via WDI. Use Value: Ensures deterministic boot state and prevents silent system lockup without requiring µP-side software intervention. | Use Scenario: Monitoring +3.3V management power rail in Ethernet switches and baseband processing units. IC Role / Device Role / Timing Role: Active-low open-drain RST drives FPGA or ASIC reset pin; MR supports field-service hard reset. Use Value: Eliminates need for discrete RC reset circuits while providing watchdog coverage for control-plane firmware. |
| Industrial Equipment | Portable/Battery-Operated Equipment |
Use Scenario: Supervising PLC controller main supply in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Monitors +3.075V VCC1 under -40°C to +85°C; RST output interfaces with microcontroller reset pin via pullup. Use Value: Delivers guaranteed reset assertion even during cold-start brownout, improving system robustness in unregulated 3.3V supplies. | Use Scenario: Battery voltage supervision in handheld test instruments with sleep/wake cycles. IC Role / Device Role / Timing Role: Low 14µA ICC1 enables continuous monitoring during standby; MR supports user-initiated reset via tactile switch. Use Value: Extends battery service life while maintaining fail-safe reset capability across charge/discharge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6731UTRD3-T | Push-pull RST output (vs. open-drain); identical VCC1 threshold (+3.075V) and D3 timeout | Direct replacement where bidirectional µP reset pins require active drive (no external pullup) | Select MAX6731UTRD3-T when interfacing with microcontrollers lacking internal pullups or requiring stronger reset drive strength. |
| TPS3808G33DBVR | Fixed +3.3V reset threshold (±0.5%), 200ms timeout, push-pull RST, no manual reset input | Lacks MR and adjustable watchdog startup; optimized for simpler, cost-sensitive designs | Choose TPS3808G33DBVR only when manual reset is unnecessary and tighter threshold accuracy is prioritized over flexibility. |
Compared with MAX6731UTRD3-T, the MAX6730UTRD3 offers open-drain RST for shared-bus compatibility but requires external pullup; versus TPS3808G33DBVR, it adds MR and configurable watchdog timing at the cost of slightly looser threshold tolerance.
Availability
MAX6730UTRD3 is available at Aetrix Electronics and suitable for computers/servers, telecom/networking equipment, and industrial equipment requiring stable component supply, long-term lifecycle support, and guaranteed reset functionality across extended temperature ranges.
Supply support for MAX6730UTRD3 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, mixed-signal, and power management ICs for high-reliability industrial, computing, and communications systems.
The MAX6730–MAX6735 family delivers single-/dual-/triple-voltage supervisors with independent watchdog outputs, targeting embedded systems needing deterministic power-on reset, brownout protection, and firmware execution monitoring.
FAQ
What is the exact VCC1 reset threshold voltage for MAX6730UTRD3?
The MAX6730UTRD3 has a factory-set VCC1 reset threshold of +3.075V (nominal), with ±1.5% tolerance over the full -40°C to +85°C operating temperature range. This value corresponds to the 'T' suffix in the part number and is guaranteed per the Electrical Characteristics table in the official datasheet.
Does MAX6730UTRD3 include a manual reset input?
Yes, the MAX6730UTRD3 includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Driving MR low forces RST assertion for the full D3 timeout period (140–280ms) after release, making it suitable for front-panel reset buttons or test-mode initiation.
What is the watchdog timeout behavior of MAX6730UTRD3?
The MAX6730UTRD3 features a dual-mode watchdog: a 35s minimum startup delay after reset allows full system initialization, then transitions to a 1.12s minimum normal-mode timeout. WDI edge detection clears the timer; absence of edges triggers WDO assertion, enabling robust firmware lockup detection.
What package type and pin count does MAX6730UTRD3 use?
The MAX6730UTRD3 is housed in a 6-pin SOT23-6 package (1.6mm × 2.9mm footprint), with pin 1 marked by a dot. Pinout includes RST (open-drain), GND, WDO (open-drain), MR, WDI, and VCC1 - matching the standard MAX6730 configuration per the datasheet pin diagram.
Is MAX6730UTRD3 compatible with 1.8V or 2.5V supply rails?
No - the MAX6730UTRD3 is configured specifically for +3.075V VCC1 supervision and is not designed to monitor lower rails directly. For 1.8V or 2.5V monitoring, select other variants (e.g., MAX6730UTVD3-T for +1.575V or MAX6732UTSYD3-T for dual +2.925V/+2.188V), or use the MAX6734/MAX6735 with RSTIN for adjustable thresholds.
MAX6730UTRD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.625V
- 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-23-6
MAX6730UTRD3 FAQ
1.How can I place an order for MAX6730UTRD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6730UTRD3 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 MAX6730UTRD3 reliable?
The price and inventory of MAX6730UTRD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6730UTRD3 is usually 5 days.
3.What payment methods are accepted for MAX6730UTRD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6730UTRD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6730UTRD3?
MAX6730UTRD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6730UTRD3 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 MAX6730UTRD3?
For technical support, including MAX6730UTRD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6730UTRD3 requirements.
6.How does Aetrix verify that MAX6730UTRD3 is sourced from the original manufacturer or authorized distributors?
All MAX6730UTRD3 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 MAX6730UTRD3 meets industry standards.
7.What is the process for return or replacement of MAX6730UTRD3?
All MAX6730UTRD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6730UTRD3, 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 MAX6730UTRD3 part is unused and in its original packaging.
Return procedure for MAX6730UTRD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6730UTRD3 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…
