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Analog Devices Inc./Maxim Integrated MAX6735KASVD3
- Part No.:
- MAX6735KASVD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6735KASVD3.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:893
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Product details
Overview
MAX6735KASVD3 from Maxim Integrated is a triple-voltage microprocessor supervisory IC with independent watchdog output, monitoring +3.075V (VCC1), +2.188V (VCC2), and an adjustable input down to +0.626V (RSTIN), featuring 210ms reset timeout, push-pull RST/WDO outputs, and manual reset input - deployed in multivoltage telecom and industrial control systems.
For engineers reviewing the MAX6735KASVD3 datasheet, MAX6735KASVD3 pinout, MAX6735KASVD3 application, or MAX6735KASVD3 equivalent, key selection criteria include confirmed triple-supply monitoring capability, push-pull reset/watchdog drive strength, -40°C to +85°C operation, and SOT23-8 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6735KASVD3 implements three independent voltage monitors: a factory-set +3.075V threshold on VCC1, +2.188V on VCC2, and a high-impedance adjustable comparator (626mV reference) on RSTIN for third-rail monitoring via external resistor divider. It guarantees valid reset assertion down to VCC1/VCC2 = +0.8V.
Its dual-mode watchdog timer provides a 35s minimum startup delay after reset to accommodate system boot, then transitions to 1.12s minimum normal-mode timeout; WDI edge detection clears the timer, and WDO asserts low on timeout or undervoltage lockout - all with independent push-pull drive capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +3.075V nominal (S suffix), ±1.5% over temperature - sets primary supply monitor for 3.3V rail integrity |
| VCC2 Threshold | +2.188V nominal (Y suffix), ±1.5% over temperature - monitors secondary 2.2V or 2.5V logic rail |
| RSTIN Reference | 626mV internal reference (±2.5mV), enabling adjustable third-rail monitoring down to +0.63V |
| Reset Timeout | 140ms–280ms (D3 option), ensuring sufficient hold time for processor initialization sequences |
| Supply Current | 14µA typical at +3.6V - enables battery-backed or ultra-low-power always-on supervision |
| Operating Temp | -40°C to +85°C - qualified for industrial and telecom equipment environments |
| Output Type | Push-pull RST and WDO - eliminates need for external pullups and supports direct interface to bidirectional µP reset pins |
Pinout & Package
SOT23-8 package (8-pin, 2.8mm × 2.9mm footprint), lead-free, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Push-pull driver; asserts low during VCC1/VCC2/RSTIN undervoltage or MR activation; no external pullup required |
| 2 - GND | Ground reference | Common return for all internal comparators, watchdog, and I/O; must be low-impedance connection |
| 3 - VCC2 | Secondary supply input | Monitors +2.188V rail; powers internal circuitry when VCC2 > VCC1; supports operation down to +0.8V |
| 4 - MR | Active-low manual reset input | Internal 50kΩ pullup to VCC1; 1µs minimum pulse width; resets watchdog and asserts RST when driven low |
| 5 - WDI | Watchdog input | Edge-sensitive; rising/falling transitions clear 1.12s normal watchdog timer; floating does not disable function |
| 6 - VCC1 | Primary supply input | Monitors +3.075V rail; powers device when VCC1 > VCC2; defines main reset timing reference |
| 7 - RSTIN | Adjustable reset comparator input | High-impedance (±25nA), referenced to 626mV; used with resistor divider to monitor third voltage ≥0.63V |
| 8 - WDO | Active-low watchdog output | Push-pull driver; asserts low on WDI timeout or VCC1/VCC2/RSTIN undervoltage; deasserts immediately when condition clears |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent voltage monitoring | Simultaneously supervises primary, secondary, and configurable third rail - reduces BOM count vs. discrete supervisors |
| Dual-mode watchdog timer | 35s startup delay + 1.12s normal timeout - accommodates complex boot sequences while maintaining rapid fault response |
| Push-pull RST and WDO outputs | Eliminates external pullup resistors and ensures robust drive into capacitive loads or bidirectional µP reset pins |
| Manual reset with internal pullup | 50kΩ internal MR pullup to VCC1 - simplifies PCB layout and enables momentary switch interface without external components |
| Immunity to short VCC transients | Validated rejection of sub-100ns glitches - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Management | Industrial PLC Control |
|---|---|
Use Scenario: Monitoring +3.3V core, +2.2V I/O, and +1.2V FPGA auxiliary rails in carrier-grade line cards. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting coordinated reset across CPU, FPGA, and PHY during brownout or startup sequencing. Use Value: Prevents partial initialization and state corruption by holding reset until all three rails stabilize within tolerance. | Use Scenario: Supervising +24V DC-DC converted +5V logic, +3.3V MCU, and +1.8V sensor interface in modular I/O modules. IC Role / Device Role / Timing Role: Fault-detection hub triggering system-wide reset and watchdog-triggered recovery upon any rail collapse. Use Value: Enables deterministic fail-safe behavior in safety-critical automation systems without software intervention. |
| Server Baseboard Management | Medical Diagnostic Equipment |
Use Scenario: Validating +12V, +5V, and +3.3V supplies powering BMC, memory, and PCIe controllers in rack-mounted servers. IC Role / Device Role / Timing Role: Independent watchdog and manual reset coordination with IPMI firmware for out-of-band recovery. Use Value: Guarantees BMC reset independence from host CPU faults - critical for remote diagnostics and maintenance. | Use Scenario: Ensuring clean power-up of +5V analog front-end, +3.3V digital controller, and +1.2V ADC reference in portable ultrasound units. IC Role / Device Role / Timing Role: Sequenced reset generator with glitch immunity for FDA-compliant power-on self-test (POST) execution. Use Value: Meets IEC 62304 Class C requirements for deterministic reset behavior under transient load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6734KASVD3-T | Same VCC1/VCC2 thresholds (+3.075V/+2.188V), same D3 timeout, but open-drain RST/WDO outputs | Requires external pullup resistors; unsuitable for direct drive of bidirectional µP reset pins without series resistor | Select when board-level pullups already exist or when level-shifting isolation is needed |
| TPS3808G33DBVR | Single-supply monitor only (+3.3V), no RSTIN input, no manual reset, fixed 200ms timeout, push-pull RST | Lacks dual/third-rail monitoring and watchdog independence - limited to basic single-rail systems | Select only for cost-sensitive, single-rail applications where triple monitoring is unnecessary |
Compared with MAX6734KASVD3-T, MAX6735KASVD3 offers stronger drive and simpler interfacing; versus TPS3808G33DBVR, it delivers full triple-rail supervision, manual reset, and independent watchdog - essential for complex embedded systems requiring robust fault containment.
Availability
MAX6735KASVD3 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6735KASVD3 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 demanding industrial, automotive, and communications applications.
The MAX6730–MAX6735 family delivers integrated triple-voltage supervision with independent watchdog functionality - engineered specifically for reliability-critical embedded systems needing coordinated multi-rail power monitoring and fail-safe recovery.
FAQ
What voltage thresholds does the MAX6735KASVD3 monitor?
The MAX6735KASVD3 monitors VCC1 at +3.075V (S suffix), VCC2 at +2.188V (Y suffix), and provides an adjustable RSTIN input with a 626mV internal reference - enabling precise third-rail supervision down to +0.63V using an external resistor divider. All thresholds are factory-trimmed and specified over -40°C to +85°C.
Does the MAX6735KASVD3 support manual reset functionality?
Yes, the MAX6735KASVD3 includes an active-low manual reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Driving MR low forces immediate RST assertion and watchdog timer reset. The minimum MR pulse width is 1µs, and it supports direct interface to pushbutton switches or logic signals without external components.
What is the watchdog behavior of the MAX6735KASVD3 during system startup?
The MAX6735KASVD3 features a dual-mode watchdog: after any reset event (power-up, brownout, or MR), it enters a 35s minimum startup mode to allow full system initialization. Once the first valid WDI edge is detected, it switches to 1.12s minimum normal-mode timeout - ensuring both safe boot and rapid fault detection.
How does the MAX6735KASVD3 handle undervoltage on its supply pins?
The MAX6735KASVD3 guarantees valid RST output down to VCC1 or VCC2 = +0.8V. Below this, reset behavior is not guaranteed. Its internal comparators remain functional across the full -40°C to +85°C range, and the device rejects short VCC transients (<100ns) to prevent false resets in electrically noisy environments.
What package type and pin count does the MAX6735KASVD3 use?
The MAX6735KASVD3 uses an 8-pin SOT23-8 package (2.8mm × 2.9mm body size) with gull-wing leads. This compact, surface-mount package supports automated assembly and is qualified for industrial temperature operation. Pinout is fully documented in the datasheet and matches the MAX6734/MAX6735 variant group.
MAX6735KASVD3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.575V, 2.925V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6735KASVD3 FAQ
1.How can I place an order for MAX6735KASVD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6735KASVD3 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 MAX6735KASVD3 reliable?
The price and inventory of MAX6735KASVD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6735KASVD3 is usually 5 days.
3.What payment methods are accepted for MAX6735KASVD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6735KASVD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6735KASVD3?
MAX6735KASVD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6735KASVD3 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 MAX6735KASVD3?
For technical support, including MAX6735KASVD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6735KASVD3 requirements.
6.How does Aetrix verify that MAX6735KASVD3 is sourced from the original manufacturer or authorized distributors?
All MAX6735KASVD3 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 MAX6735KASVD3 meets industry standards.
7.What is the process for return or replacement of MAX6735KASVD3?
All MAX6735KASVD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6735KASVD3, 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 MAX6735KASVD3 part is unused and in its original packaging.
Return procedure for MAX6735KASVD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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