My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6735KASVD3+T
- Part No.:
- MAX6735KASVD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6735KASVD3+T.pdf
- Description:
- IC SUPERVISOR MPU W/WD SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX6735KASVD3+T from Maxim Integrated is a triple-voltage microprocessor supervisor IC with independent watchdog output, monitoring +3.075V (VCC1), +2.313V (VCC2), and an adjustable input down to +0.63V via RSTIN. It features push-pull RESET and WDO outputs, 140–280ms reset timeout, and operates across –40°C to +85°C for multivoltage embedded systems.
For engineers reviewing the MAX6735KASVD3+T datasheet, MAX6735KASVD3+T pinout, MAX6735KASVD3+T application, or MAX6735KASVD3+T equivalent, this device delivers verified triple-supply monitoring, factory-set thresholds, manual reset input, low 14µA supply current, and AEC-Q100-qualified variants - critical for telecom, industrial, and automotive power sequencing and fault recovery.
Technical Context
The MAX6735KASVD3+T implements three independent voltage monitors: VCC1 at +3.075V nominal, VCC2 at +2.313V nominal, and RSTIN with a fixed 626mV internal reference enabling external resistor-divider-based threshold adjustment. Its dual-mode watchdog timer provides a 35s minimum startup delay after reset and a 1.12s minimum normal-mode timeout.
It integrates push-pull RESET and WDO outputs - eliminating need for external pullups - and includes a 50kΩ internal MR pullup, 100nS MR glitch rejection, and guaranteed reset validity down to VCC = +0.8V. All logic thresholds scale with VCC1 (0.3×/0.7×).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +3.075V (nominal), factory-set for reliable +3.3V rail monitoring |
| VCC2 Threshold | +2.313V (nominal), factory-set for stable +2.5V or +2.2V rail supervision |
| RSTIN Threshold | +626mV (fixed internal reference), enables precise third-rail monitoring via external divider |
| Reset Timeout | 140–280ms (D3 option), ensures sufficient processor initialization time before release |
| Supply Current | 14µA typical at +3.6V, minimizes quiescent power in battery-backed systems |
| Watchdog Startup Delay | 35s minimum after reset, accommodates complex boot sequences without false timeout |
| Operating Temp | –40°C to +85°C, fully specified for industrial and extended-temperature applications |
Pinout & Package
MAX6735KASVD3+T is housed in an 8-pin SOT23 package (K8SN+1 outline), footprint-compatible with industry-standard 8-pin SOT23 layouts and optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RST | Active-low reset output | Push-pull driver; asserts low on VCC1/VCC2/RSTIN undervoltage or MR activation; no external pullup required |
| 2 GND | Ground reference | Common return path for all internal comparators, timers, and I/O; must be low-impedance |
| 3 VCC2 | Secondary supply input | Monitors +2.313V rail; powers secondary comparator; valid down to +0.8V |
| 4 MR | Active-low manual reset input | 50kΩ internal pullup to VCC1; accepts TTL/CMOS levels; 1µs minimum pulse width |
| 5 WDI | Watchdog input | Edge-sensitive; clears watchdog timer on rising/falling transition; unconnected requires 100kΩ-to-GND |
| 6 WDO | Active-low watchdog output | Push-pull driver; asserts low on WDI stall or VCC/RSTIN undervoltage; deasserts immediately on recovery |
| 7 RSTIN | Adjustable reset comparator input | High-impedance (±25nA) 626mV-referenced input; supports external divider for third-rail monitoring |
| 8 VCC1 | Primary supply input | Monitors +3.075V rail; powers core logic and primary comparator; supplies MR pullup and WDI reference |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1 (+3.075V), VCC2 (+2.313V), and RSTIN (adjustable down to +0.63V) - eliminates need for multiple discrete supervisors |
| Push-pull RESET & WDO | Eliminates external pullup resistors and associated board area; ensures fast, deterministic output drive into capacitive loads |
| Dual-mode watchdog timer | 35s startup delay prevents premature timeout during boot; 1.12s normal mode enables rapid lockup detection post-initialization |
| Guaranteed operation down to VCC = +0.8V | Ensures valid reset assertion even during deep brownout conditions, improving system robustness |
| Immunity to short VCC transients | Rejects <100ns glitches on monitored rails - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Supervising +3.3V, +2.5V, and FPGA core voltage in base station control cards. IC Role / Device Role / Timing Role: Triple-rail monitor ensuring synchronized power-up and brownout detection across mixed-voltage domains. Use Value: Prevents firmware corruption by asserting RESET until all rails stabilize above +3.075V, +2.313V, and adjusted RSTIN threshold - validated over –40°C to +85°C. | Use Scenario: Monitoring CPU, I/O expander, and isolated sensor supply in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Fault-detection hub triggering system-wide reset on any rail collapse, with manual reset for field service. Use Value: Push-pull RST drives multiple downstream reset inputs directly; 14µA ICC enables always-on supervision in low-power standby modes. |
| Automotive Infotainment Head Units | Network Switch Management Controllers |
Use Scenario: Validating +3.3V SoC supply, +1.8V memory rail, and +1.2V GPU core in AEC-Q100-compliant infotainment modules. IC Role / Device Role / Timing Role: Triple-supply watchdog supervisor with automotive-grade qualification (via MAX6734KATGD3/V+T lineage) and thermal robustness. Use Value: 35s watchdog startup delay accommodates multi-stage bootloaders; RSTIN divider configures exact core voltage threshold per SoC spec. | Use Scenario: Ensuring reliable restart of ARM-based management processors after PoE power interruptions or hot-swap events. IC Role / Device Role / Timing Role: Supervisor with manual reset and edge-triggered watchdog, interfacing directly with bidirectional processor reset pins via 10kΩ isolation resistor. Use Value: MR input allows remote reset via GPIO; WDO-to-MR loopback enables autonomous recovery from software hangs without host intervention. |
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 | Identical VCC1/VCC2/RSTIN thresholds and D3 timeout, but open-drain RST/WDO outputs | Requires external pullup resistors; suited for wired-OR reset buses or level-shifting interfaces | Select when system architecture mandates open-drain reset signaling or shared reset lines. |
| TPS3808G33DBVR | Single-supply supervisor only (+3.3V threshold); no RSTIN input or dual-voltage monitoring; 200ms timeout | Lacks triple-monitoring capability and manual reset; limited to single-rail applications | Choose only if design uses only one monitored rail and does not require MR or adjustable input. |
Compared with MAX6734KASVD3+T and TPS3808G33DBVR, the MAX6735KASVD3+T uniquely combines triple-supply monitoring, push-pull outputs, manual reset, and adjustable RSTIN in a single 8-pin SOT23 - reducing BOM count and PCB area while enabling robust fault recovery in multirail systems.
Availability
MAX6735KASVD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, automotive infotainment, and network switch applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX6735KASVD3+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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6730–MAX6735 family was engineered specifically for high-reliability microprocessor supervision in multivoltage systems - delivering integrated triple-rail monitoring, independent watchdog, and manual reset in ultra-small packages.
FAQ
What is the exact reset threshold voltage for VCC1 on the MAX6735KASVD3+T?
The MAX6735KASVD3+T has a factory-set VCC1 reset threshold of +3.075V (nominal), with a guaranteed range of +3.000V to +3.150V under falling conditions. This value is defined by the "T" suffix in the part number and is fully specified over –40°C to +85°C with ±20ppm/°C tempco.
Does the MAX6735KASVD3+T support monitoring a third voltage, and how is it configured?
Yes, the MAX6735KASVD3+T supports third-voltage monitoring via its RSTIN pin, which features a fixed +626mV internal reference. To monitor voltages above +626mV, connect a resistive divider between the target rail and GND, with the midpoint fed to RSTIN. The MAX6735KASVD3+T's high-impedance RSTIN input (±25nA) enables use of large-value resistors to minimize power draw.
What is the watchdog timeout behavior of the MAX6735KASVD3+T during system power-up?
The MAX6735KASVD3+T implements a dual-mode watchdog timer: after any reset event (power-up, brownout, or MR assertion), it enters a 35s minimum startup delay period before enforcing the normal 1.12s timeout. This ensures the system completes full initialization - including bootloader execution and peripheral configuration - before watchdog supervision begins.
Is the MAX6735KASVD3+T pin-compatible with other devices in the MAX6730–MAX6735 family?
No - the MAX6735KASVD3+T uses an 8-pin SOT23 package and is not pin-compatible with the 6-pin SOT23 variants (e.g., MAX6730–MAX6733). However, it shares identical pin functions with the MAX6734KASVD3+T (same 8-pin layout), differing only in RST/WDO output type (push-pull vs. open-drain).
What is the supply current consumption of the MAX6735KASVD3+T at +3.6V?
The MAX6735KASVD3+T draws 14µA typical supply current at +3.6V (VCC1 = VCC2 = +3.6V, all outputs unasserted), with a maximum of 39µA across temperature and process variation. This ultra-low quiescent current enables continuous supervision in battery-critical or energy-harvesting applications without significant runtime impact.
MAX6735KASVD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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+T FAQ
1.How can I place an order for MAX6735KASVD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6735KASVD3+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 MAX6735KASVD3+T reliable?
The price and inventory of MAX6735KASVD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6735KASVD3+T is usually 5 days.
3.What payment methods are accepted for MAX6735KASVD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6735KASVD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6735KASVD3+T?
MAX6735KASVD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6735KASVD3+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 MAX6735KASVD3+T?
For technical support, including MAX6735KASVD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6735KASVD3+T requirements.
6.How does Aetrix verify that MAX6735KASVD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6735KASVD3+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 MAX6735KASVD3+T meets industry standards.
7.What is the process for return or replacement of MAX6735KASVD3+T?
All MAX6735KASVD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6735KASVD3+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 MAX6735KASVD3+T part is unused and in its original packaging.
Return procedure for MAX6735KASVD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6735KASVD3+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…
