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Analog Devices Inc./Maxim Integrated MAX6753KA30/V+T
- Part No.:
- MAX6753KA30/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6753KA30/V+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6753KA30/V+T from Analog Devices is a window watchdog supervisory IC for automotive-grade microprocessor monitoring, featuring factory-trimmed 3.0V ±2% VCC reset threshold, adjustable slow/fast watchdog timeout (tWD2/tWD1) via external capacitor and pin-strapped ratio (8×/16×/64×), and push-pull active-low RESET output. It operates across -40°C to +125°C and supports dual-voltage monitoring when configured with external resistor divider on RESET IN.
For engineers reviewing the MAX6753KA30/V+T datasheet, MAX6753KA30/V+T pinout, MAX6753KA30/V+T application, or MAX6753KA30/V+T equivalent, key selection criteria include its windowed watchdog behavior (fast/slow fault detection), AEC-Q100 qualification, 3.7µA supply current at 1.8V, and SOT23-8 package compatibility with space-constrained automotive and industrial embedded systems.
Technical Context
The MAX6753KA30/V+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 strapping. It does not support extended-mode watchdog scaling like MAX6746–MAX6751.
Its fixed 3.0V VCC reset threshold (±2% over -40°C to +125°C) is factory-trimmed and independent of external components; RESET IN monitoring remains available for secondary voltage supervision using an external resistor divider referenced to 1.235V internal threshold. The device guarantees valid RESET assertion down to VCC ≥ 1V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.000V ±2% (factory-trimmed, guaranteed over -40°C to +125°C) |
| Supply Current | 3.7µA typical at VCC = 1.8V, enabling ultra-low-power battery-backed operation |
| Watchdog Type | Windowed (min/max) watchdog: detects both fast and slow WDI transitions outside defined tWD1/tWD2 boundaries |
| Reset Timeout | Adjustable via CSRT capacitor: tRP = 4.94 × 10⁶ × CSRT (e.g., 1500pF → ~7.4ms) |
| Slow Watchdog Period | tWD2 = 0.65 × 10⁹ × CSWT (e.g., 1500pF → 975ms typical) |
| Fast Watchdog Period | Selectable tWD1 ratios: 8×, 16×, or 64× slower than tWD2 via SET0/SET1 pins |
| Operating Temp | -40°C to +125°C (AEC-Q100 qualified for automotive applications) |
| Package | 8-pin SOT23 (K8+5A outline, RoHS-compliant) |
Pinout & Package
MAX6753KA30/V+T is housed in an 8-pin SOT23 package (outline 21-0078, land pattern 90-0176), optimized for high-density PCB layouts in automotive and portable electronics. Thermal resistance is 196°C/W (Junction-to-Ambient, four-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET IN | High-impedance input for adjustable reset threshold; connects to center tap of external R-divider to monitor secondary voltage (e.g., 1.235V reference) |
| 2 | SET1 | Logic input selecting fast watchdog ratio: low/high configures tWD1 as 8×/16×/64× slower than tWD2 or disables watchdog |
| 3 | SWT | Capacitor connection point setting slow watchdog timeout tWD2; grounded to disable watchdog |
| 4 | SRT | Capacitor connection point setting reset timeout period tRP; value directly determines deassertion delay after fault clearance |
| 5 | GND | Ground reference for all internal circuitry and external timing capacitors |
| 6 | WDI | Watchdog input detecting falling edges; triggers RESET if edge timing violates tWD1 (too fast) or tWD2 (too slow) |
| 7 | RESET | Push-pull active-low reset output; drives µP reset pin directly without external pullup; valid for VCC ≥ 1V |
| 8 | VCC | Main supply input (1.2V–5.5V); powers internal circuitry and enables fixed 3.0V VCC reset monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Windowed watchdog timer | Detects both processor lockup (slow WDI) and runaway execution (fast WDI), eliminating single-threshold blind spots |
| Factory-trimmed 3.0V reset threshold | ±2% accuracy over full automotive temperature range eliminates calibration overhead and external resistor networks |
| Capacitor-adjustable timeouts | Independent tuning of reset (CSRT) and slow watchdog (CSWT) periods enables precise alignment with µP boot/firmware timing |
| AEC-Q100 qualification | Validated for automotive use including HTOL, TCT, and ESD testing - suitable for engine control, ADAS, and body electronics |
| Ultra-low quiescent current | 3.7µA at 1.8V enables >10-year battery life in always-on monitoring applications such as telematics and remote sensors |
| Power-supply transient immunity | Rejects ≤50µs transients 100mV below VTH, reducing false resets in noisy automotive electrical environments |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Safety Monitor |
|---|---|
|
Use Scenario: Real-time monitoring of main 3.3V rail and auxiliary 5V sensor supply in diesel ECU under cranking conditions (-12V to +16V transients). IC Role / Device Role / Timing Role: MAX6753KA30/V+T asserts RESET during brownout on VCC and detects firmware hang via windowed WDI strobing every 50–200ms. Use Value: Prevents unsafe actuator commands during voltage instability; tWD1/tWD2 guard against both stuck-loop and accelerated-execution faults missed by standard watchdogs. |
Use Scenario: Supervising ARM Cortex-M7-based controller in SIL2-certified programmable logic controller with dual-redundant power rails. IC Role / Device Role / Timing Role: Provides independent reset generation and windowed watchdog supervision, decoupled from software-based health checks. Use Value: Enables deterministic fail-safe response within 7.4ms (tRP) and eliminates undetected latent faults through dual-boundary watchdog enforcement. |
| Medical Infusion Pump Controller | Smart Energy Meter MCU |
|
Use Scenario: Battery-powered infusion pump requiring continuous µP supervision during 10-year shelf life and runtime operation on Li-ion cells (2.7–4.2V). IC Role / Device Role / Timing Role: MAX6753KA30/V+T monitors VCC and uses WDI strobes synchronized to motor step timing to validate real-time control loop integrity. Use Value: 3.7µA ICC extends battery life while windowed watchdog ensures delivery accuracy - no missed or double-delivered doses due to silent firmware corruption. |
Use Scenario: AMI meter with metrology SoC operating in harsh grid environments subject to lightning-induced surges and voltage sags. IC Role / Device Role / Timing Role: Resets metering core on VCC dip below 3.0V and validates firmware liveness via WDI pulses aligned to billing interval interrupts. Use Value: Guarantees data integrity during grid disturbances; tWD2 = 975ms (CSWT = 1500pF) accommodates longest allowable interrupt latency without false trigger. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6752KA32/V+T | Identical pinout and windowed watchdog, but fixed 3.2V reset threshold (3.136V–3.224V) and tighter hysteresis (0.65–0.90%) | Better suited for 3.3V systems requiring higher reset margin; same AEC-Q100 qualification and SOT23-8 footprint | Select MAX6752KA32/V+T when system VCC nominal is 3.3V and tighter threshold tolerance improves noise margin. |
| TLV809E30DBVR | Single-function 3.0V reset IC only (no watchdog), 1.6µA ICC, SOT23-3 package, no RESET IN or WDI capability | Limited to basic power-on reset; lacks windowed watchdog, manual reset, or dual-voltage monitoring features | Choose TLV809E30DBVR only for cost-sensitive, space-constrained designs where watchdog functionality is implemented in firmware. |
Compared with MAX6752KA32/V+T and TLV809E30DBVR, the MAX6753KA30/V+T uniquely balances AEC-Q100 compliance, windowed watchdog coverage, and 3.0V threshold precision - making it optimal for automotive and industrial controllers requiring both robust reset and advanced fault-detection timing.
Availability
MAX6753KA30/V+T is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC safety monitors, medical infusion pump controllers, and smart energy meter MCUs requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MAX6753KA30/V+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 automotive, industrial, communications, and healthcare markets with precision timing, power management, and supervisory solutions.
The MAX6746–MAX6753 family was designed specifically for automotive and industrial microprocessor supervision, emphasizing AEC-Q100 reliability, ultra-low power, and flexible reset/watchdog configurability in minimal SOT23-8 packaging.
FAQ
What is the exact reset threshold voltage of MAX6753KA30/V+T and how is it specified?
The MAX6753KA30/V+T has a factory-trimmed VCC reset threshold of 3.000V with ±2% tolerance over the full automotive temperature range (-40°C to +125°C). This value is confirmed in the Electrical Characteristics table under "VCC Reset Threshold" with MIN/TYP/MAX values of 2.940V/3.000V/3.060V. The /V suffix in the part number denotes AEC-Q100 qualification, and the "30" suffix explicitly indicates the 3.0V threshold variant per Table 2 in the datasheet.
Does MAX6753KA30/V+T support manual reset functionality?
No, MAX6753KA30/V+T does not include a dedicated manual-reset (MR) input. Its pinout (SOT23-8) allocates Pin 1 to RESET IN, Pin 2 to SET1, and omits MR - unlike MAX6746/MAX6747 which feature MR on Pin 1. Manual reset must be implemented externally, for example by pulling RESET IN low via a switch and resistor network, as described in the Applications Information section for MAX6748–MAX6751.
How is the windowed watchdog timeout configured on MAX6753KA30/V+T?
The MAX6753KA30/V+T uses two independent timeout settings: slow watchdog period tWD2 is set by capacitor CSWT on Pin 3 (SWT), calculated as tWD2 = 0.65 × 10⁹ × CSWT; fast watchdog period tWD1 is selected via logic levels on SET0 and SET1 (Pins 2 and 6), offering 8×, 16×, or 64× ratios relative to tWD2. No WDS pin is present - extended-mode scaling is exclusive to MAX6746–MAX6751.
What package type and RoHS status does MAX6753KA30/V+T use?
MAX6753KA30/V+T is supplied in an 8-pin SOT23 package with outline number 21-0078 and land pattern 90-0176. The "+T" suffix confirms tape-and-reel packaging, and the "/V" denotes AEC-Q100 qualification. Per Maxim/Analog Devices documentation, the "+" in the package code K8+5A indicates RoHS-compliant construction, verified per JEDEC J-STD-609.
Can MAX6753KA30/V+T monitor a second voltage besides VCC?
Yes, MAX6753KA30/V+T supports dual-voltage monitoring via its RESET IN pin (Pin 1), which references an internal 1.235V comparator threshold. By connecting an external resistor divider between VCC and GND with RESET IN at the midpoint, users can configure supervision of a secondary rail (e.g., 5V, 2.5V) using the formula VMON_TH = 1.235 × (R1 + R2)/R2. This function operates independently of the fixed 3.0V VCC threshold.
MAX6753KA30/V+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:
- 3V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6753KA30/V+T FAQ
1.How can I place an order for MAX6753KA30/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6753KA30/V+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 MAX6753KA30/V+T reliable?
The price and inventory of MAX6753KA30/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6753KA30/V+T is usually 5 days.
3.What payment methods are accepted for MAX6753KA30/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6753KA30/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6753KA30/V+T?
MAX6753KA30/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6753KA30/V+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 MAX6753KA30/V+T?
For technical support, including MAX6753KA30/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6753KA30/V+T requirements.
6.How does Aetrix verify that MAX6753KA30/V+T is sourced from the original manufacturer or authorized distributors?
All MAX6753KA30/V+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 MAX6753KA30/V+T meets industry standards.
7.What is the process for return or replacement of MAX6753KA30/V+T?
All MAX6753KA30/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6753KA30/V+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 MAX6753KA30/V+T part is unused and in its original packaging.
Return procedure for MAX6753KA30/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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