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Analog Devices Inc./Maxim Integrated MAX6734AKATID3+T
- Part No.:
- MAX6734AKATID3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6734AKATID3+T.pdf
- Description:
- IC MPU CIRCUIT TRPL-VOLT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,599
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Product details
Overview
MAX6734AKATID3+T from Maxim Integrated is a triple-voltage microprocessor supervisor IC with independent watchdog output, monitoring two factory-set supply rails (VCC1/VCC2) and one adjustable input (RSTIN), featuring 140ms–280ms reset timeout, open-drain RST/WDO outputs, and manual reset input - used in multivoltage embedded systems requiring reliable power-on reset and lockup recovery.
For engineers reviewing the MAX6734AKATID3+T datasheet, MAX6734AKATID3+T pinout, MAX6734AKATID3+T application, or MAX6734AKATID3+T equivalent, this page delivers verified specifications, validated pin functions, confirmed triple-supply monitoring capability, and real-world substitution guidance for telecom, industrial, and portable equipment designs.
Technical Context
The MAX6734AKATID3+T implements dual-threshold voltage monitoring (VCC1 at +3.075V nominal, VCC2 at +1.665V nominal) plus an adjustable RSTIN comparator referenced to a precise 626mV internal bandgap, enabling third-rail supervision down to +0.63V via external resistor divider. Its reset logic asserts active-low RST when any monitored rail falls below threshold or MR is pulled low.
It integrates a dual-mode watchdog timer: 35s minimum startup delay after reset enables full system initialization, followed by 1.12s minimum normal-mode timeout on WDI transitions. The open-drain RST and WDO outputs require external pullups and remain valid down to VCC1/VCC2 = +0.8V, ensuring robust operation during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | +3.075V (nominal, falling edge), factory-set for primary supply monitoring |
| VCC2 Threshold | +1.665V (nominal, falling edge), factory-set for secondary supply monitoring |
| RSTIN Threshold | +626mV (typical), enables adjustable third-rail monitoring down to +0.63V |
| Reset Timeout | 140–280ms (D3 suffix), guarantees minimum reset assertion duration after fault clearance |
| Watchdog Timeout | 35s min startup / 1.12s min normal mode, prevents premature timeout during boot |
| Supply Current | 14µA (typ at +3.6V), supports ultra-low-power battery-operated applications |
| Operating Temp | −40°C to +125°C, qualified for automotive-grade and industrial environments |
Pinout & Package
MAX6734AKATID3+T is housed in an 8-pin SOT23-8 package (K8S-3), measuring 3.00mm × 1.75mm × 1.30mm, with gull-wing leads and pin 1 marked by a dot. The package supports reflow soldering and is available in lead-free (+T) configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RST | Active-low reset output | Open-drain output; requires external pullup; asserts low on VCC1/VCC2/RSTIN undervoltage or MR activation |
| 2 - GND | Ground reference | Common return path for all internal circuitry and comparator references |
| 3 - WDO | Active-low watchdog output | Open-drain output; asserts low on WDI timeout or VCC/RSTIN undervoltage; deasserts immediately upon valid WDI edge |
| 4 - VCC2 | Secondary supply input | Power source and monitored rail; supplies internal circuitry when > VCC1; threshold = +1.665V |
| 5 - VCC1 | Primary supply input | Power source and monitored rail; supplies internal circuitry when > VCC2; threshold = +3.075V |
| 6 - WDI | Watchdog input | Edge-sensitive input; clears watchdog timer on rising/falling transition; floating = no disable |
| 7 - RSTIN | Adjustable reset comparator input | High-impedance input referenced to 626mV; monitors third rail via resistive divider; leakage < ±100nA |
| 8 - MR | Active-low manual reset input | Pulled up internally to VCC1 (50kΩ); drives RST low when asserted; pulse width ≥ 1µs sufficient |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage monitoring | Simultaneously supervises VCC1, VCC2, and RSTIN - eliminates need for three discrete supervisors |
| Factory-set dual thresholds | VCC1 = +3.075V, VCC2 = +1.665V (suffix "AT") - reduces BOM count and layout complexity |
| Adjustable third-rail input | RSTIN comparator with 626mV reference - enables precise monitoring of core voltages as low as +0.63V |
| Dual-mode watchdog timer | 35s startup delay + 1.12s normal timeout - accommodates long boot sequences without false resets |
| Immunity to VCC transients | Rejects falling transients ≤ 100ns at 75mV overdrive - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Supervising +3.3V control logic, +1.8V FPGA core, and +1.2V analog supply in a remote radio unit. IC Role / Device Role / Timing Role: Triple-rail supervisor asserting synchronized reset across domains and triggering watchdog recovery on firmware hang. Use Value: Eliminates discrete reset ICs and ensures deterministic power-up sequencing with 140ms reset hold time. |
Use Scenario: Monitoring +24V field bus interface, +5V controller supply, and +3.3V communication PHY in an industrial controller. IC Role / Device Role / Timing Role: Fault-detection node that asserts system-wide reset on any rail collapse and initiates watchdog recovery if CPU locks. Use Value: Guarantees reset validity down to VCC = +0.8V and survives harsh EMI environments due to transient immunity. |
| Portable Medical Monitor | Set-Top Box SoC Platform |
|
Use Scenario: Managing battery-backed +3.0V MCU, +1.8V sensor interface, and +1.1V display driver in a handheld diagnostic device. IC Role / Device Role / Timing Role: Low-quiescent-current (14µA) supervisor enabling extended standby life while maintaining reliable wake-up reset integrity. Use Value: Reduces total solution size vs. discrete alternatives and supports adjustable RSTIN for custom LDO tracking. |
Use Scenario: Coordinating +12V power stage, +3.3V SoC I/O, and +1.1V processor core in a consumer media box. IC Role / Device Role / Timing Role: Centralized reset arbiter with manual reset button support and independent WDO for software health monitoring. Use Value: Enables single-button factory reset and automatic recovery from frozen bootloader states via MR–WDO loopback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6734AKASVD3+T | VCC2 threshold = +1.575V (vs. +1.665V); same package, pinout, and D3 timeout | Better match for 1.5V logic rails; less margin for 1.6V/1.65V supplies | Select when supervising +1.5V secondary rail instead of +1.65V |
| MAX6735AKATID3+T | Push-pull RST/WDO outputs (vs. open-drain); identical thresholds, timeout, and pinout | Eliminates external pullups but requires level compatibility with µP reset pin | Select when driving bidirectional µP reset pins without series resistor |
Compared with MAX6734AKATID3+T, MAX6734AKASVD3+T offers tighter VCC2 threshold alignment for 1.5V systems, while MAX6735AKATID3+T replaces open-drain outputs with push-pull - simplifying board design where load capacitance and rise-time constraints permit.
Availability
MAX6734AKATID3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and portable medical devices requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX6734AKATID3+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 MAX6730A–MAX6735A family delivers integrated triple-supply supervision with independent watchdog functionality - engineered for high-reliability embedded systems where deterministic reset behavior and lockup recovery are critical.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6734AKATID3+T?
The MAX6734AKATID3+T has factory-set thresholds: VCC1 nominal = +3.075V (suffix "T"), VCC2 nominal = +1.665V (suffix "I"). These values are specified over −40°C to +125°C with ±1.5% tolerance and 20ppm/°C tempco. The actual trip points fall within 3.000V–3.150V (VCC1) and 1.620V–1.710V (VCC2) per datasheet Table 1.
Does MAX6734AKATID3+T support manual reset, and how is it implemented?
Yes, MAX6734AKATID3+T includes an active-low manual reset input (MR) on pin 8. It features an internal 50kΩ pullup to VCC1, accepts CMOS-level inputs, and requires only a ≥1µs low pulse to assert RST. Leaving MR unconnected defaults to inactive state; connecting to GND via a momentary switch provides hardware reset capability without external debounce.
What is the function of the RSTIN pin on MAX6734AKATID3+T, and what voltage range can it monitor?
RSTIN (pin 7) is a high-impedance comparator input with a fixed 626mV internal reference. It enables monitoring of a third supply rail - e.g., a processor core voltage - by connecting an external resistor divider. With VRSTIN = 626mV × (R1 + R2)/R2, MAX6734AKATID3+T can supervise voltages from +0.63V up to VCC1, with input leakage < ±100nA ensuring minimal divider current draw.
How does the watchdog timer operate in MAX6734AKATID3+T, and what are its timing modes?
The MAX6734AKATID3+T watchdog operates in two modes: a 35s minimum startup delay after reset (to allow full system initialization), then transitions to 1.12s minimum normal timeout on WDI edges. WDI must receive a rising or falling edge within each timeout window; failure asserts WDO low. Floating WDI does not disable the timer - it continues counting.
Is MAX6734AKATID3+T compatible with 1.8V or 2.5V logic levels on its MR and WDI inputs?
Yes - MR and WDI inputs are referenced to VCC1 and accept standard CMOS thresholds: VIH = 0.7 × VCC1, VIL = 0.3 × VCC1. With VCC1 = +3.075V, this yields VIH ≥ +2.15V and VIL ≤ +0.92V, making MAX6734AKATID3+T fully compatible with 1.8V and 2.5V logic families driving those pins, provided VCC1 remains within spec.
MAX6734AKATID3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6734AKATID3+T FAQ
1.How can I place an order for MAX6734AKATID3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6734AKATID3+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 MAX6734AKATID3+T reliable?
The price and inventory of MAX6734AKATID3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6734AKATID3+T is usually 5 days.
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4.How is shipping managed for MAX6734AKATID3+T?
MAX6734AKATID3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6734AKATID3+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 MAX6734AKATID3+T?
For technical support, including MAX6734AKATID3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6734AKATID3+T requirements.
6.How does Aetrix verify that MAX6734AKATID3+T is sourced from the original manufacturer or authorized distributors?
All MAX6734AKATID3+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 MAX6734AKATID3+T meets industry standards.
7.What is the process for return or replacement of MAX6734AKATID3+T?
All MAX6734AKATID3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6734AKATID3+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 MAX6734AKATID3+T part is unused and in its original packaging.
Return procedure for MAX6734AKATID3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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