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Analog Devices Inc./Maxim Integrated MAX6734KATZD3+T
- Part No.:
- MAX6734KATZD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6734KATZD3+T.pdf
- Description:
- IC SUPERVISOR MPU W/WD SOT23-6
- Quantity:
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Product details
Overview
MAX6734KATZD3+T from Maxim Integrated is a triple-voltage microprocessor supervisor IC with independent watchdog timer, monitoring VCC1 (4.625V threshold), VCC2 (2.313V threshold), and adjustable RSTIN (626mV reference), featuring open-drain RST/WDO outputs, manual reset input, and 140ms–280ms reset timeout. It ensures reliable power-on reset and brownout detection in multivoltage embedded systems.
For engineers reviewing the MAX6734KATZD3+T datasheet, MAX6734KATZD3+T pinout, MAX6734KATZD3+T application, or MAX6734KATZD3+T equivalent, this page delivers verified electrical parameters, SOT23-8 pin mapping, real-world use cases in telecom and industrial equipment, and two validated alternative parts with documented functional differences.
Technical Context
The MAX6734KATZD3+T implements dual-threshold voltage monitoring (VCC1/VCC2) plus a high-impedance adjustable comparator input (RSTIN) referenced to an internal 626mV bandgap. Its reset logic asserts active-low RST when any monitored supply falls below its factory-set threshold or when MR is pulled low.
It integrates a dual-mode watchdog timer: 35s minimum startup delay after reset, followed by 1.12s minimum normal-mode timeout; WDI edge detection clears the timer, and WDO asserts independently of RST. All functions operate across –40°C to +85°C with guaranteed reset validity down to VCC = +0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Reset Threshold | 4.625V (factory-set, L suffix), ensures reliable reset at +4.63V nominal supply |
| VCC2 Reset Threshold | 2.313V (factory-set, Z suffix), matches common +2.3V auxiliary rails |
| RSTIN Threshold | 626.5mV (typ), enables precise monitoring of third voltage via external resistor divider |
| Reset Timeout Period | 140ms (min) / 280ms (max), D3 suffix provides mid-range delay for stable initialization |
| Watchdog Startup Delay | 35s (min), allows full system boot before watchdog enforcement begins |
| Supply Current | 15µA (typ at +3.6V), minimizes quiescent load in battery-powered applications |
| Operating Temperature | –40°C to +85°C, fully specified for industrial-grade reliability |
Pinout & Package
MAX6734KATZD3+T is housed in an 8-pin SOT23 package (K8SN+1 outline), measuring 2.9mm × 1.6mm × 1.1mm, with exposed pad for thermal performance. Pin 1 is marked with a dot; device orientation follows JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup; asserts during VCC1/VCC2/RSTIN undervoltage or MR activation |
| 2 | GND | Power ground reference for all internal comparators and logic |
| 3 | VCC2 | Secondary supply input; powers secondary monitor and contributes to device biasing |
| 4 | MR | Active-low manual reset input; internally pulled up to VCC1 (50kΩ); debounced by design |
| 5 | RSTIN | Adjustable reset comparator input; high-impedance (±25nA), referenced to 626mV internal reference |
| 6 | WDI | Watchdog input; edge-sensitive; resets watchdog timer on rising/falling transitions |
| 7 | WDO | Active-low open-drain watchdog output; independent of RST; asserts on WDI timeout or VCC fault |
| 8 | VCC1 | Primary supply input; powers core circuitry and primary reset monitor; dominant supply above VCC2 |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneously monitors VCC1 (+4.625V), VCC2 (+2.313V), and adjustable RSTIN (down to +0.63V), reducing need for discrete supervisors |
| Dual-mode watchdog timer | 35s startup delay enables safe boot; 1.12s normal timeout detects runtime lockups without false triggers |
| Immunity to VCC transients | Rejects short-duration falling glitches (e.g., <100ns at 100mV overdrive), preventing spurious resets |
| Low-power operation | 15µA typical supply current at +3.6V supports always-on monitoring in portable systems |
| Guaranteed reset down to 0.8V | Ensures valid RST assertion even during deep brownout, critical for fail-safe shutdown sequencing |
Applications
| Telecom Power Management | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Monitoring +48V DC/DC converter output, +3.3V logic rail, and +2.5V FPGA core voltage in base station power subsystems. IC Role / Device Role / Timing Role: MAX6734KATZD3+T acts as centralized reset arbiter and watchdog enforcer, coordinating power-up sequencing and detecting processor hang during firmware updates. Use Value: Eliminates three discrete reset ICs; 140ms reset timeout aligns with telecom power-good timing requirements per GR-1089. |
Use Scenario: Supervising +24V field bus supply, +5V controller rail, and +1.8V ADC reference in programmable logic controller backplanes. IC Role / Device Role / Timing Role: MAX6734KATZD3+T provides deterministic reset initiation and independent watchdog oversight of real-time control loops. Use Value: Adjustable RSTIN input monitors isolated analog supply; open-drain outputs interface safely with 24V-tolerant PLC inputs. |
| Network Switch ASIC Boot | Battery-Powered Medical Monitor |
Use Scenario: Validating +12V PoE midspan supply, +3.3V switch fabric rail, and +1.0V ASIC core voltage during cold start of managed Ethernet switches. IC Role / Device Role / Timing Role: MAX6734KATZD3+T serves as primary boot supervisor, asserting RST until all rails stabilize and initiating watchdog supervision post-boot. Use Value: Factory-set thresholds eliminate calibration; 35s watchdog startup delay accommodates complex ASIC initialization sequences. |
Use Scenario: Ensuring reliable reset of ARM Cortex-M4 MCU, +3.3V sensor interface, and +1.2V RF transceiver in handheld ECG devices powered by Li-ion cells. IC Role / Device Role / Timing Role: MAX6734KATZD3+T guarantees clean reset during battery voltage sag and detects firmware crashes via WDI polling. Use Value: 15µA quiescent current extends battery life; RSTIN monitoring of battery voltage divider enables low-battery warning before shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6734KALTD3+T | VCC2 threshold = 2.925V (L suffix) vs. 2.313V (Z); otherwise identical pinout, timing, and features | Suitable for systems with +3.0V secondary rail instead of +2.3V; requires revalidation of VCC2 margin | Select when monitoring higher VCC2 voltages; same SOT23-8 footprint and reset timeout |
| TPS3808G33DBVR | Single-supply supervisor (3.3V only); no RSTIN input or dual-VCC monitoring; push-pull RST; 200ms timeout | Lacks triple-monitoring capability; cannot replace MAX6734KATZD3+T in multivoltage designs without additional components | Use only in single-rail applications where VCC1 = VCC2 = 3.3V and no adjustable monitoring is needed |
Compared with MAX6734KATZD3+T, MAX6734KALTD3+T offers identical architecture with shifted VCC2 threshold for different rail voltages, while TPS3808G33DBVR provides simpler single-rail supervision but omits critical triple-monitoring and adjustable input functionality required for complex embedded systems.
Availability
MAX6734KATZD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical electronics requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability (note: this variant is industrial-grade, not automotive-qualified).
Supply support for MAX6734KATZD3+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 power, sensing, and interface applications, with emphasis on high-reliability industrial and communications solutions.
The MAX6730–MAX6735 family targets embedded systems requiring robust, multi-rail power supervision and autonomous watchdog protection-designed specifically for space-constrained, multivoltage μP platforms where discrete solutions increase BOM cost and board area.
FAQ
What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6734KATZD3+T?
The MAX6734KATZD3+T has a VCC1 reset threshold of 4.625V (L suffix) and a VCC2 reset threshold of 2.313V (Z suffix), both factory-trimmed and guaranteed over temperature. These values are fixed per the part number suffix and do not require external configuration. The MAX6734KATZD3+T uses these precise thresholds to supervise primary and secondary rails without trimming resistors or calibration.
Does the MAX6734KATZD3+T support adjustable voltage monitoring, and how is it implemented?
Yes, the MAX6734KATZD3+T supports adjustable voltage monitoring via its RSTIN pin, which features a 626.5mV (typ) internal reference. To monitor voltages above 626mV, connect a resistive divider from the target rail to RSTIN and GND. The MAX6734KATZD3+T asserts RST when the divided voltage drops below the reference, enabling supervision of a third rail such as +5V, +12V, or battery voltage.
What is the watchdog timeout behavior of the MAX6734KATZD3+T during power-up?
The MAX6734KATZD3+T implements a dual-mode watchdog: after any reset event (power-up, brownout, or MR assertion), it enters a 35s minimum startup delay before enforcing the normal 1.12s timeout. This allows time for full system initialization. The MAX6734KATZD3+T does not assert WDO during startup unless WDI remains static beyond 35s, preventing premature resets during boot.
Is the MAX6734KATZD3+T pin-compatible with other devices in the MAX6730–MAX6735 family?
Yes, the MAX6734KATZD3+T shares the same 8-pin SOT23-8 (K8SN+1) package and pinout with all MAX6734/MAX6735 variants, including MAX6734KALTD3+T and MAX6735KAxxDx+T. Pin functions (RST, GND, VCC2, MR, RSTIN, WDI, WDO, VCC1) are identical across the MAX6734/MAX6735 series, enabling drop-in replacement when voltage thresholds and output type match.
What are the absolute maximum ratings for VCC1 and VCC2 on the MAX6734KATZD3+T?
The MAX6734KATZD3+T specifies absolute maximum ratings of –0.3V to +6V for VCC1 and VCC2 pins. Operation is guaranteed within 0.8V to 5.5V per Electrical Characteristics. Exceeding +6V risks permanent damage; the device is not rated for 12V or higher supplies without external clamping or regulation. Always observe these limits in MAX6734KATZD3+T designs.
MAX6734KATZD3+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:
- -
MAX6734KATZD3+T FAQ
1.How can I place an order for MAX6734KATZD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6734KATZD3+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 MAX6734KATZD3+T reliable?
The price and inventory of MAX6734KATZD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6734KATZD3+T is usually 5 days.
3.What payment methods are accepted for MAX6734KATZD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6734KATZD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6734KATZD3+T?
MAX6734KATZD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6734KATZD3+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 MAX6734KATZD3+T?
For technical support, including MAX6734KATZD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6734KATZD3+T requirements.
6.How does Aetrix verify that MAX6734KATZD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6734KATZD3+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 MAX6734KATZD3+T meets industry standards.
7.What is the process for return or replacement of MAX6734KATZD3+T?
All MAX6734KATZD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6734KATZD3+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 MAX6734KATZD3+T part is unused and in its original packaging.
Return procedure for MAX6734KATZD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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