My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6750KA26+T
- Part No.:
- MAX6750KA26+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6750KA26+T.pdf
- Description:
- IC SUPERVISOR UP RESET CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6750KA26+T from Maxim Integrated is a capacitor-adjustable microprocessor supervisory circuit with dual-voltage monitoring (VCC and external RESET IN), factory-trimmed 2.625V ±2% reset threshold, 7.59ms typical reset timeout (CSRT = 1500pF), and window watchdog capability. It operates across -40°C to +125°C and supports automotive-grade systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6750KA26+T datasheet, MAX6750KA26+T pinout, MAX6750KA26+T application, or MAX6750KA26+T equivalent, this device delivers precise dual-supply monitoring, configurable windowed watchdog timing (tWD1/tWD2), AEC-Q100 qualification, and push-pull/open-drain RESET output selection - critical for safety-critical embedded controllers and battery-powered instrumentation.
Technical Context
The MAX6750KA26+T implements dual independent reset comparators: one monitors VCC against its factory-set 2.625V threshold (±2%), while the other monitors an externally divided voltage at RESET IN using a fixed 1.235V internal reference. Its window watchdog uses two distinct timeout periods - tWD1 (fast fault) and tWD2 (slow fault) - determined by CSWT capacitance and SET0/SET1 pin strapping.
Reset assertion is guaranteed for VCC ≥ 1.0V, and the device maintains valid RESET logic during supply transients up to 50µs at 100mV overdrive. Supply current is 3.7µA typical at VCC = 2.0V, enabling ultra-low-power operation in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.625V ±2% (factory-trimmed, VCC monitor); enables accurate brownout detection at nominal 2.6V rail |
| Reset Timeout | 7.59ms typical (CSRT = 1500pF); ensures µP completes power-up initialization before release |
| Supply Current | 3.7µA typical (VCC ≤ 2.0V); minimizes quiescent drain in always-on battery systems |
| Operating Temp | -40°C to +125°C; fully specified for under-hood automotive and industrial control environments |
| Watchdog Type | Window watchdog (tWD1/tWD2); detects both premature and delayed WDI transitions - prevents runaway or stalled firmware |
| RESET Output | Push-pull or open-drain active-low; supports direct µP reset input or level-shifted interfacing up to 6V |
| AEC-Q100 | Qualified per Grade 0 (-40°C to +125°C); meets automotive reliability and stress-test requirements |
Pinout & Package
MAX6750KA26+T is housed in an 8-pin SOT23 package (package code K8+5, outline 21-0078), optimized for space-constrained PCB layouts in automotive and portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Adjustable reset comparator input | Accepts external resistor-divider to monitor secondary supply (e.g., 3.3V, 1.8V); threshold referenced to 1.235V internal bandgap |
| 2 - GND | Ground reference | Common return path for all analog and digital functions; must be low-impedance for noise immunity |
| 3 - SWT | Slow watchdog timeout capacitor input | Connects to ground via CSWT to set tWD2 (slow fault period); formula: tWD2 = 0.65 × 10⁹ × CSWT (seconds) |
| 4 - SRT | Reset timeout capacitor input | Connects to ground via CSRT to set tRP (reset pulse width); formula: tRP = 4.94 × 10⁶ × CSRT (seconds) |
| 5 - VCC | Power supply input | Monitored primary supply (1.2V–5.5V); powers internal circuitry and enables VCC reset detection |
| 6 - SET0 | Watchdog window ratio select (logic input) | Strapped high/low with SET1 to configure tWD1:tWD2 ratio (8×, 16×, 64×) or disable watchdog |
| 7 - WDI | Watchdog input | Falling-edge-triggered; asserts RESET if pulses fall outside tWD1–tWD2 window (fast/slow fault detection) |
| 8 - RESET | Active-low reset output | Drives µP reset pin directly; push-pull version guarantees defined state down to VCC = 1V |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage monitoring | Simultaneously supervises VCC (2.625V ±2%) and external supply via RESET IN - eliminates need for second supervisor IC |
| Window watchdog timer | Detects both fast (tWDI < tWD1) and slow (tWDI > tWD2) WDI transitions - prevents false resets from jitter and catches hung firmware |
| Capacitor-adjustable timing | Independent CSRT (reset) and CSWT (watchdog) capacitors enable precise, application-tailored timeouts without firmware changes |
| Transient immunity | Immune to VCC glitches ≤50µs at 100mV overdrive - avoids spurious resets in noisy automotive or industrial power environments |
| AEC-Q100 Grade 0 | Validated for automotive under-hood use; includes extended temperature stress, ESD, and latch-up testing per JEDEC standards |
Applications
| Automotive Engine Control Unit (ECU) | Medical Infusion Pump Controller |
|---|---|
|
Use Scenario: Monitors 2.6V microcontroller supply and 3.3V sensor interface rail in engine management system exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Dual-supply supervisor asserting RESET during brownout and detecting firmware hang via window watchdog on CAN controller WDI line. Use Value: Prevents unsafe ECU operation during voltage sags; window watchdog catches stuck states missed by standard timeout-based supervision. |
Use Scenario: Ensures safe startup and runtime integrity of battery-powered infusion pump MCU operating from 2.6V Li-ion cell with isolated 3.3V analog front-end. IC Role / Device Role / Timing Role: Provides fail-safe reset during battery depletion and validates motor control loop timing via tWD1/tWD2 windowed watchdog. Use Value: Guarantees deterministic reset behavior down to 1.0V VCC; eliminates risk of silent firmware lockup compromising dose accuracy. |
| Industrial PLC I/O Module | Portable Test Equipment |
|
Use Scenario: Supervises 2.6V FPGA configuration supply and 5.0V isolated communication rail in DIN-rail mounted PLC module subjected to EFT and surge events. IC Role / Device Role / Timing Role: Dual-threshold monitoring with transient-immune reset generation and manual-reset support via MR-compatible RESET IN pin. Use Value: Maintains functional safety integrity during EMC stress; RESET IN allows shared manual reset with system-level diagnostics. |
Use Scenario: Manages power-up sequencing and runtime watchdog for ARM Cortex-M based handheld multimeter powered by single-cell Li-ion (2.6V–4.2V). IC Role / Device Role / Timing Role: Factory-trimmed 2.625V threshold matches nominal battery voltage; capacitor-adjustable tRP accommodates variable µP boot time. Use Value: Eliminates external resistor network for reset threshold; ultra-low 3.7µA ICC extends battery life without sacrificing supervision fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6751KA26+T | Same pinout and electrical specs, but includes manual-reset input (MR) instead of SET0; no window watchdog - only basic watchdog with WDS extend mode | Suitable for designs needing simple manual reset but not windowed fault detection | Select MAX6751KA26+T when MR functionality is required and window watchdog is unnecessary |
| TLV809E26DBZR | Single-supply supervisor only (2.63V ±1.5%), no adjustable timeout, no watchdog, SOT23-3 package, lower ICC (0.5µA), non-AEC-Q100 | Applicable only for basic reset-only applications without dual monitoring or watchdog needs | Choose TLV809E26DBZR for cost-sensitive, non-automotive designs where only VCC reset is required |
Compared with MAX6750KA26+T, MAX6751KA26+T adds manual reset but removes window watchdog flexibility, while TLV809E26DBZR reduces feature set and automotive compliance to achieve lower cost and quiescent current - making each suitable for distinct safety and complexity tiers.
Availability
MAX6750KA26+T is available at Aetrix Electronics and suitable for automotive engine control units, medical infusion pumps, industrial PLC modules, and portable test equipment requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MAX6750KA26+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 and mixed-signal ICs for demanding industrial, automotive, and medical applications, emphasizing reliability, low power, and integration.
The MAX6746–MAX6753 product line delivers highly configurable µP supervisors with capacitor-adjustable timing, dual-voltage monitoring, and window watchdogs - engineered specifically for functional safety-critical embedded systems in harsh environments.
FAQ
What is the factory-trimmed reset threshold voltage for MAX6750KA26+T?
The MAX6750KA26+T features a factory-trimmed VCC reset threshold of 2.625V ±2% over -40°C to +125°C. This value corresponds to the "26" suffix in the part number and is laser-trimmed during production for high accuracy without external components. The device also provides a separate 1.235V ±0.8% internal reference for RESET IN monitoring.
Does MAX6750KA26+T support window watchdog functionality?
Yes, MAX6750KA26+T implements a true window watchdog using two independent timeout periods: tWD1 (fast fault) and tWD2 (slow fault). These are configured via CSWT capacitance and SET0/SET1 pin strapping (e.g., low/low = 8× ratio). A WDI falling edge outside the tWD1–tWD2 window triggers RESET for the full tRP duration.
What is the minimum VCC required for guaranteed RESET output validity in MAX6750KA26+T?
MAX6750KA26+T guarantees valid RESET logic (VOH/VOL specifications met) for VCC ≥ 1.0V. Below 1.0V, output drive strength degrades; however, the push-pull variant (as indicated by "KA" in the part number) maintains defined logic states down to VCC = 1V, unlike open-drain versions that require external pullup.
How is the reset timeout period adjusted on MAX6750KA26+T?
The reset timeout period (tRP) is set by connecting a capacitor (CSRT) between the SRT pin and GND. The relationship is tRP = 4.94 × 10⁶ × CSRT (tRP in seconds, CSRT in farads). For example, a 1500pF capacitor yields ~7.59ms typical timeout. Low-leakage ceramic capacitors are recommended for stability.
Is MAX6750KA26+T qualified for automotive applications?
Yes, MAX6750KA26+T is AEC-Q100 qualified (Grade 0, -40°C to +125°C) and designed for automotive use. It undergoes rigorous stress testing including temperature cycling, HTOL, ESD, and latch-up per JEDEC standards, with full traceability and PPAP support available through Aetrix Electronics.
MAX6750KA26+T 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:
- 2
- Voltage - Threshold:
- 2.625V, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6750KA26+T FAQ
1.How can I place an order for MAX6750KA26+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6750KA26+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 MAX6750KA26+T reliable?
The price and inventory of MAX6750KA26+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6750KA26+T is usually 5 days.
3.What payment methods are accepted for MAX6750KA26+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6750KA26+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6750KA26+T?
MAX6750KA26+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6750KA26+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 MAX6750KA26+T?
For technical support, including MAX6750KA26+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6750KA26+T requirements.
6.How does Aetrix verify that MAX6750KA26+T is sourced from the original manufacturer or authorized distributors?
All MAX6750KA26+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 MAX6750KA26+T meets industry standards.
7.What is the process for return or replacement of MAX6750KA26+T?
All MAX6750KA26+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6750KA26+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 MAX6750KA26+T part is unused and in its original packaging.
Return procedure for MAX6750KA26+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6750KA26+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…
