My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6753KA26+T
- Part No.:
- MAX6753KA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6753KA26+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,017
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6753KA26+T from Analog Devices is a window watchdog supervisory IC for automotive-grade microprocessor monitoring, featuring factory-trimmed 2.625V ±2% VCC reset threshold, adjustable slow/fast watchdog timeout (tWD2 = 0.65×10⁹×CSWT; tWD1 selectable via SET0/SET1 pin strapping), and push-pull active-low RESET output. It operates from 1.2V to 5.5V supply and supports dual-voltage monitoring in select variants.
For engineers reviewing the MAX6753KA26+T datasheet, MAX6753KA26+T pinout, MAX6753KA26+T application, or MAX6753KA26+T equivalent, this device delivers AEC-Q100 qualified, capacitor-adjustable reset/watchdog timing with transient immunity and guaranteed RESET validity down to VCC ≥ 1V - critical for battery-powered controllers, medical equipment, and intelligent instrumentation requiring robust brownout and windowed fault detection.
Technical Context
The MAX6753KA26+T implements a min/max (windowed) watchdog architecture that asserts RESET when WDI falling edges occur either faster than tWD1 (fast fault) or slower than tWD2 (slow fault), with tWD2 set by CSWT and tWD1 selected via SET0/SET1 logic states (8×, 16×, or 64× ratio). It does not support extended-mode watchdog or manual reset input.
Unlike MAX6746–MAX6751, it lacks WDS and MR pins; instead, it uses SET0 and SET1 as dedicated watchdog window-ratio configuration inputs. Its fixed 2.625V VCC reset threshold is factory-trimmed to ±2% over –40°C to +125°C, and RESET remains asserted for tRP = 4.94×10⁶×CSRT after recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.625V ±2% (factory-trimmed); ensures precise brownout detection at nominal 2.625V supply without external resistor network. |
| Supply Voltage Range | 1.2V to 5.5V; supports operation across low-voltage battery systems (e.g., 1.8V/2.5V rails) and standard 3.3V/5V domains. |
| Quiescent Current | 3.7µA (typ at VCC ≤ 2.0V); enables multi-year battery life in portable and remote sensor applications. |
| Reset Timeout Period | Adjustable from ~0.5ms to ~9.5ms via CSRT capacitor; matches μP power-up sequencing requirements across diverse embedded platforms. |
| Slow Watchdog Period (tWD2) | Calculated as tWD2 = 0.65×10⁹ × CSWT (seconds); provides long-duration fault detection window (e.g., 975ms at CSWT = 1500pF). |
| Fast Watchdog Period (tWD1) | Selectable ratios: 8×, 16×, or 64× tWD2 via SET0/SET1 pin strapping; enables fine-grained window tuning for real-time software execution monitoring. |
| Operating Temperature | –40°C to +125°C; fully specified for under-hood automotive, industrial control, and medical environments. |
| RESET Output Type | Push-pull active-low; eliminates need for external pull-up, simplifies interface to μP reset inputs, and guarantees valid logic state down to VCC = 1V. |
Pinout & Package
MAX6753KA26+T is housed in an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176), RoHS-compliant, with 1.9mm × 2.8mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SET0 | Logic input selecting fast watchdog window ratio (low/high); defines tWD1 as 8×, 16×, or 64× tWD2 when used with SET1. |
| 2 | SET1 | Logic input co-defining watchdog window ratio with SET0; disables watchdog when SET0 = high, SET1 = low. |
| 3 | SWT | Watchdog timeout input; connects to ground via capacitor CSWT to set slow watchdog period tWD2. |
| 4 | SRT | Reset timeout input; connects to ground via capacitor CSRT to set reset assertion duration tRP. |
| 5 | GND | Ground reference for all internal circuitry and external capacitors; must be low-impedance connection. |
| 6 | WDI | Window watchdog input; falling edge triggers fault detection if interval violates tWD1/tWD2 boundaries. |
| 7 | RESET | Push-pull active-low reset output; drives μP reset pin directly; sinks current up to 3.2mA at VCC ≥ 4.5V. |
| 8 | VCC | Main supply input (1.2V–5.5V); powers internal circuitry and serves as monitored voltage source for fixed-threshold reset. |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Detects both fast and slow processor faults - prevents runaway code and missed deadlines by enforcing strict timing windows on WDI activity. |
| Factory-trimmed 2.625V reset threshold | ±2% accuracy over full automotive temperature range eliminates calibration overhead and reduces BOM count vs. adjustable-threshold alternatives. |
| Capacitor-adjustable timing | Independent CSRT and CSWT capacitors enable precise, board-level tuning of reset hold time and watchdog window without firmware changes. |
| AEC-Q100 qualified | Qualified to Grade 1 (–40°C to +125°C), supporting functional safety requirements in automotive ECUs and ADAS subsystems. |
| Low 3.7µA quiescent current | Minimizes standby power draw in always-on battery-powered systems such as portable medical monitors and telematics units. |
| Push-pull RESET output | Eliminates external pull-up resistor, reduces component count, and ensures deterministic reset state during VCC ramp-down to 1V. |
Applications
| Automotive Engine Control Unit (ECU) | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 2.6V microcontroller supply and validates firmware execution timing in engine management systems exposed to harsh thermal and EMI environments. IC Role / Device Role / Timing Role: Window watchdog supervisor asserting RESET on out-of-window WDI pulses; fixed 2.625V VCC threshold detects brownout during cranking. Use Value: Prevents undetected processor lockup during transient voltage sags or software hangs - critical for ASIL-B compliance and fail-safe behavior. |
Use Scenario: Ensures reliable boot and runtime supervision of ARM-based patient monitoring SoC powered by lithium coin cell or rechargeable battery. IC Role / Device Role / Timing Role: Provides capacitor-tuned reset timeout and dual-boundary watchdog enforcement to catch missed interrupt servicing or stack overflow. Use Value: Extends battery life via 3.7µA supply current while guaranteeing safe shutdown or reboot upon detected timing violations. |
| Industrial Programmable Logic Controller (PLC) | Smart Energy Meter |
Use Scenario: Supervises dual-rail FPGA configuration and real-time controller in DIN-rail mounted PLC operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Factory-trimmed reset threshold ensures stable trip point across temperature; window watchdog validates cyclic task execution. Use Value: Eliminates need for external voltage divider and trimming components, reducing layout area and qualification effort for industrial certifications. |
Use Scenario: Monitors 2.6V RTC and metering ASIC supply in utility-grade smart meters deployed in outdoor enclosures with wide temperature swings. IC Role / Device Role / Timing Role: Push-pull RESET output interfaces directly to metering SoC reset pin; tWD1/tWD2 window adapts to variable firmware update cycles. Use Value: Guarantees valid reset assertion down to VCC = 1V, preventing undefined behavior during deep brownout conditions common in grid-edge deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6752KA32+T | Same window watchdog architecture and pinout, but factory-trimmed to 3.200V ±2% VCC reset threshold. | Targeted at 3.3V systems requiring higher reset threshold; not suitable for 2.6V rail monitoring without external scaling. | Select MAX6752KA32+T only when supervising 3.3V supplies where 3.2V trip point aligns with system brownout margin. |
| TLV803EB26DBZR | Single-function reset IC with fixed 2.63V threshold and no watchdog; SOT23-5 package; 0.9µA typical ICC. | Lacks window watchdog capability and adjustable timing; suited for basic power-on reset only, not runtime fault detection. | Choose TLV803EB26DBZR only for cost-sensitive, non-safety-critical applications where watchdog functionality is omitted from system design. |
Compared with MAX6753KA26+T, MAX6752KA32+T offers identical windowed watchdog operation but targets 3.3V rails, while TLV803EB26DBZR provides ultra-low-power basic reset without timing supervision - making MAX6753KA26+T the sole option for AEC-Q100-compliant, capacitor-tunable 2.6V window watchdog supervision.
Availability
MAX6753KA26+T is available at Aetrix Electronics and suitable for automotive engine control units, portable medical monitors, industrial PLCs, smart energy meters, and battery-powered controllers requiring stable component supply with full lifecycle support.
Supply support for MAX6753KA26+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision timing, power management, and sensor solutions.
The MAX6746–MAX6753 family was designed specifically for AEC-Q100-compliant microprocessor supervision in harsh environments, delivering capacitor-adjustable reset and advanced windowed watchdog functionality for functional safety-critical embedded systems.
FAQ
What is the factory-trimmed reset threshold voltage of the MAX6753KA26+T?
The MAX6753KA26+T features a factory-trimmed VCC reset threshold of 2.625V with ±2% tolerance over the full –40°C to +125°C temperature range. This value is confirmed in the Electrical Characteristics table and Reset Threshold Voltage Suffix table (suffix "26" corresponds to 2.625V typ). The threshold is internally fixed and does not require external resistor networks.
Does the MAX6753KA26+T support manual reset input (MR)?
No, the MAX6753KA26+T does not include a manual reset (MR) input. Per the Pin Configurations table and Selector Guide, MR is only present on MAX6746/MAX6747. The MAX6753KA26+T uses SET0 and SET1 pins exclusively for watchdog window-ratio selection and has no MR pin - its reset assertion is triggered solely by VCC drop below 2.625V, RESET IN violation (not applicable here), or windowed watchdog fault on WDI.
How is the watchdog timeout configured on the MAX6753KA26+T?
The MAX6753KA26+T implements a windowed watchdog with two independent timeouts: slow period tWD2 is set by capacitor CSWT on SWT pin (tWD2 = 0.65×10⁹ × CSWT), and fast period tWD1 is selected via SET0/SET1 logic states (8×, 16×, or 64× tWD2). Unlike MAX6746–MAX6751, it has no WDS pin and does not support extended-mode timeout multiplication.
What package type and footprint does the MAX6753KA26+T use?
The MAX6753KA26+T is packaged in an 8-pin SOT23 (package code K8+5A, outline 21-0078, land pattern 90-0176), measuring 1.9mm × 2.8mm with 0.95mm height. It is RoHS-compliant and compatible with standard SOT23 reflow profiles, including peak soldering temperature of +260°C.
Is the MAX6753KA26+T AEC-Q100 qualified?
Yes, the MAX6753KA26+T is AEC-Q100 qualified per the "Benefits and Features" section and Ordering Information. It is rated for Grade 1 temperature range (–40°C to +125°C) and meets stress testing requirements for automotive electronic components, making it suitable for under-hood and infotainment applications.
MAX6753KA26+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- 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:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6753KA26+T FAQ
1.How can I place an order for MAX6753KA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6753KA26+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 MAX6753KA26+T reliable?
The price and inventory of MAX6753KA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6753KA26+T is usually 5 days.
3.What payment methods are accepted for MAX6753KA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6753KA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6753KA26+T?
MAX6753KA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6753KA26+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 MAX6753KA26+T?
For technical support, including MAX6753KA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6753KA26+T requirements.
6.How does Aetrix verify that MAX6753KA26+T is sourced from the original manufacturer or authorized distributors?
All MAX6753KA26+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 MAX6753KA26+T meets industry standards.
7.What is the process for return or replacement of MAX6753KA26+T?
All MAX6753KA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6753KA26+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 MAX6753KA26+T part is unused and in its original packaging.
Return procedure for MAX6753KA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6753KA26+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…
